Harris RF Communications Division MX-9325 Multimode data transceiver User Manual in PDF format

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PUBLICATION NUMBER: 10515-0152-4300
JUNE 2000
Rev. 02
Air Traffic Control Communications
MX-9325
TRANSCEIVER
INTERMEDIATE MAINTENANCE
MANUAL
next level solutions
The material contained herein is subject to U.S. export approval.
No export or re-export is permitted without written approval from the U.S. Government.
LIMITED ONE YEAR WARRANTY
HARRIS CORPORATION (RF COMMUNICATIONS DIVISION)
FROM HARRIS TO YOU – This warranty is extended to the original buyer and applies to all Harris Corporation, RF
Communications Division equipment purchased and employed for the service normally intended, except those products
specifically excluded.
WHAT WE WILL DO – If your Harris Corporation, RF Communications Division equipment purchased from us for use outside the
United States fails in normal use because of a defect in workmanship or materials within one year from the date of shipment, we
will repair or replace (at our option) the equipment or part without charge to you, at our factory. If the product was purchased for
use in the United States, we will repair or replace (at our option) the equipment or part without charge to you at our Authorized Repair
Center or factory.
WHAT YOU MUST DO – You must notify us promptly of a defect within one year from date of shipment. Assuming that Harris
concurs that the complaint is valid, and is unable to correct the problem without having the equipment shipped to Harris:
•
•
Customers with equipment purchased for use outside the United States will be supplied with information for the return
of the defective equipment or part to our factory in Rochester, NY, U.S.A., for repair or replacement. You must prepay
all transportation, insurance, duty and customs charges. We will pay for return to you of the repaired/replaced equipment
or part, C.I.F. destination; you must pay any duty, taxes or customs charges.
Customers with equipment purchased for use in the United States must obtain a Return Authorization Number, properly
pack, insure, prepay the shipping charges and ship the defective equipment or part to our factory or to the Authorized
Warranty Repair Center indicated by us.
Harris Corporation
RF Communications Division
Customer Service
1680 University Avenue
Rochester, NY 14610, U.S.A.
Telephone: (716) 244-5830
Fax: 716-242-4755
http://www.harris.com
Harris will repair or replace the defective equipment or part and pay for its return to you, provided the repair or replacement is due
to a cause covered by this warranty.
WHAT IS NOT COVERED – We regret that we cannot be responsible for:
•
•
•
•
•
Defects or failures caused by buyer or user abuse or misuse.
Defects or failures caused by unauthorized attempts to repair or alter the equipment in any way.
Consequential damages incurred by a buyer or user from any cause whatsoever, including, but not limited to
transportation, non-Harris repair or service costs, downtime costs, costs for substituting equipment or loss of anticipated
profits or revenue.
The performance of the equipment when used in combination with equipment not purchased from Harris.
HARRIS MAKES NO OTHER WARRANTIES BEYOND THE EXPRESS WARRANTY AS CONTAINED HEREIN. ALL
EXPRESS OR IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY ARE
EXCLUDED.
SERVICE WARRANTY – Any repair service performed by Harris under this limited warranty is warranted to be free from defects
in material or workmanship for sixty days from date of repair. All terms and exclusions of this limited warranty apply to the service
warranty.
IMPORTANT – Customers who purchased equipment for use in the United States must obtain a Return Authorization Number
before shipping the defective equipment to us. Failure to obtain a Return Authorization Number before shipment may result in a
delay in the repair/replacement and return of your equipment.
IF YOU HAVE ANY QUESTIONS – Concerning this warranty or equipment sales or services, please contact our Customer Service
Department.
PUBLICATION NUMBER: 10515-0152-4300
JUNE 2000
Rev. 02
MX-9325
TRANSCEIVER
The material contained herein is subject to U.S. export approval. No export or
re-export is permitted without written approval from the U.S. Government.
Information and descriptions contained herein are the property of Harris Corporation. Such information
and descriptions may not be copied or reproduced by any means, or disseminated or distributed without
the express prior written permission of Harris Corporation, RF Communications Division, 1680 University
Avenue, Rochester, New York 14610-1887.
Copyright  2000
By Harris Corporation
All Rights Reserved
Firmware Release: rev. TBD
HARRIS CORPORATION RF COMMUNICATIONS DIVISION
1680 University Avenue Rochester, New York 14610-1887 USA
Tel: 716-244-5830. Fax: 716-242-4755. http://www.harris.com
MX-9325
When an Adult Stops Breathing
WARNING
DO NOT attempt to perform the rescue breathing techniques provided
on this page, unless certified. Performance of these techniques by
uncertified personnel could result in further injury or death to the victim.
Does the Person
Respond?

 Tap or gently shake
victim.

 Shout, “Are you OK?”
Shout, “Help!”

 Call people who can
phone for help.
Roll Person
Onto Back

 Roll victim toward you
by pulling slowly.
Open Airway

 Tilt head back and lift
chin.
Check for
Breathing

 Look, listen, and feel
for breathing for
3 to 5 seconds.
Give 2 Full
Breaths
Keep head tilted back.
Pinch nose shut.
Seal your lips tight
around victim’s mouth.
Give 2 full breaths for
1 to 1-1/2 seconds each.
10
Check for Pulse
at Side of Neck

 Feel for pulse for
5 to 10 seconds.
ii
Begin Rescue
Breathing
Keep head tilted back.
Lift chin.
Pinch nose shut.
Give 1 full breath
every 5 seconds.
Look, listen, and feel for
breathing between breaths.
Phone
for Help

 Send someone to call
an ambulance.
Recheck Pulse
Every Minute

 Keep head tilted back.

 Feel for pulse for
5 to 10 seconds.

 If victim has pulse but is
not breathing, continue
rescue breathing. If no
pulse, begin CPR.
For more information about these and other life–saving techniques, contact your Red Cross chapter for training.
“When Breathing Stops” reproduced with permission from an American Red Cross Poster.
MX-9325
SAFETY SUMMARY
SAFETY SUMMARY
1. INTRODUCTION
All operators and maintenance personnel must observe the following safety precautions during operation and
maintenance of this equipment. Specific warnings and cautions are provided in the manual and at the end of this
Safety Summary. Warnings, Cautions, and Notes appear before various steps in the manual and will be used as
follows:
•
WARNING – Used when injury or death to personnel and damage to equipment is possible
•
CAUTION – Used when there is a possibility of damage to equipment
•
NOTE
– Used to alert personnel to a condition that requires emphasis
2. PERSONNEL AND EQUIPMENT SAFETY
Basic safety precautions consider factors involved in protecting personnel from injury or death. Electrical,
mechanical, EMR, material, or chemical hazards are the most common types of hazards found in electronic
equipment. The following are types of hazards that may exist:
ELECTRICAL
– Hazardous voltage and current levels may exist throughout the equipment. Contact
with these hazards could cause electrocution, electrical shock, burns, or injury due to
involuntary reflexes of the body.
MECHANICAL – Mechanical hazards are created when heavy assemblies and components must be
removed and replaced. Moving parts (such as fan blades) and hot surfaces are
potential mechanical hazards.
THERMAL
– Burn hazards may exist in the equipment that could cause personal injuries and/or
serious equipment damage. Internal surfaces of the equipment may be in excess of
65°C, the point at which personnel could be burned. Extreme caution should be used
when working with any hot assemblies (for example, power supply or power amplifier
assemblies). Physical injury or damage may result to personnel and/or equipment as a
result of a reflex action to a burn.
CHEMICAL
– Chemicals or materials used for servicing the equipment may present potential
hazards. Many chemical agents, such as cleaners and solvents, may be toxic, volatile,
or flammable. If used incorrectly, these agents can cause injury or death.
EMR
– Overexposure to electromagnetic radiation results from amplified radio frequencies
that may produce a health hazard.
xi
MX-9325
SAFETY SUMMARY
3. OPERATIONAL AND MAINTENANCE SAFETY GUIDELINES
Good safety discipline is critical to prevent injury to personnel. All other safety measures are useless if personnel
do not observe the safety precautions and do not follow safety disciplines. Once aware of a hazard, personnel
should ensure that all other personnel are aware of the hazard. The following basic safety disciplines are stressed:
a.
Read a procedure entirely before performing it. Personnel must always perform each assigned task in a
safe manner.
b.
Prior to applying equipment power after maintenance, personnel must ensure that all unsecured hand
tools and test equipment are disconnected from the serviced/maintained equipment and properly stored.
c.
Power to the equipment must be removed before a piece of equipment is removed.
d.
Extreme care must be used when adjusting or working on operating equipment. Voltages in excess of
70 V or current sources in excess of 25 A are covered with barriers. Barriers include warning information
about the hazard encountered upon barrier removal.
e.
Personnel must react when someone is being electrically shocked. Perform the following steps:
1.
Shut off power.
2.
Call for help.
3.
Administer first aid if qualified.
Under no circumstances should a person come directly in contact with the body unless the power has
been removed. When immediate removal of the power is not possible, personnel must use a
non-conductive material to try to jolt or pry the body away from the point of shock.
xii
f.
Personnel should work with one hand whenever possible to prevent electrical current from passing
through vital organs of the body. In addition, personnel must never work alone. Someone must be
available in the immediate area to render emergency first aid, if necessary.
g.
Lifting can cause injury. Items weighing more than 37 pounds must be lifted by two or more people.
h.
Some electrolytic capacitors contain aluminum oxide or tantalum. If connected incorrectly, the capacitor
will explode when power is applied. Extreme care must be used when replacing and connecting these
capacitors. The capacitor terminals must always be connected using the correct polarity: positive to
positive and negative to negative.
MX-9325
SAFETY SUMMARY
The next section contains general safety precautions not directly related to specific procedures or equipment.
These precautions are oriented toward the maintenance technician. However, all personnel must understand and
apply these precautions during the many phases of operation and maintenance of the equipment. The following
precautions must be observed:
DO NOT SERVICE EQUIPMENT ALONE
Never work on electrical equipment unless another person familiar with the operation and hazards of the
equipment is near. When the maintenance technician is aided by operators, ensure that operators are aware of
the hazards.
GROUNDING
Always ensure that all equipment and assemblies are properly grounded when operating or servicing.
TURN OFF POWER AND GROUND CAPACITORS
Whenever possible, power to equipment should be turned off before beginning work on the equipment. Be
sure to ground all capacitors that are potentially dangerous.
KEEP AWAY FROM LIVE CIRCUITS
Operators and maintainers must observe all safety regulations at all times. Do not change components or
make adjustments inside equipment with a high voltage supply on unless required by the procedure. Under
certain conditions, dangerous potentials may exist in circuits with power controls off, due to charges retained
by capacitors.
DO NOT BYPASS INTERLOCKS
Do not bypass any interlocks unnecessarily. If it is necessary to employ an interlock bypass for equipment
servicing, use extreme care not to come in contact with hazardous voltages.
USE CARE HANDLING HEAVY EQUIPMENT
Never attempt to lift large assemblies or equipment without knowing their weight. Use enough personnel or a
mechanical lifting device to properly handle the item without causing personal injury.
HEED WARNINGS AND CAUTIONS
Specific warnings and cautions are provided to ensure the safety and protection of personnel and equipment.
Be familiar with and strictly follow all warnings and cautions on the equipment and in technical manuals.
PROTECTIVE EYEWEAR
All personnel must wear protective eyewear when servicing or maintaining equipment. Protective eyewear
must be worn at all times when using tools.
xiii
MX-9325
SAFETY SUMMARY
4. PROTECTION OF STATIC-SENSITIVE DEVICES
Diode input-protection is provided on all CMOS devices. This protection is designed to guard against adverse
electrical conditions such as electrostatic discharge. Although most static-sensitive devices contain protective
circuitry, several precautionary steps should be taken to avoid the application of potentially damaging
voltages to the inputs of the device.
To protect static-sensitive devices from damage, the following precautions should be observed.
a.
Keep all static-sensitive devices in their protective packaging until needed. This packaging is
conductive and should provide adequate protection for the device. Storing or transporting these
devices in conventional plastic containers could be destructive to the device.
b.
Disconnect power prior to insertion or extraction of these devices. This also applies to PWBs
containing such devices.
c.
Double check test equipment voltages and polarities prior to conducting any tests.
d.
Avoid contact with the leads of the device. The component should always be handled carefully by
the ends or side opposite the leads.
e.
Avoid contact between PWB circuits or component leads and synthetic clothing.
f.
Use only soldering irons and tools that are properly grounded. Ungrounded soldering tips or tools
can destroy these devices. SOLDERING GUNS MUST NEVER BE USED.
5. EXPLANATION OF HAZARD SYMBOLS
The symbol of drops of a liquid onto a hand shows that the material will cause burns or
irritation of human skin or tissue.
The symbol of a person wearing goggles shows that the material will injure your eyes.
The symbol of a flame shows that a material can ignite and burn you.
The symbol of a skull and crossbones shows that a material is poisonous or a danger to life.
The symbol of a human figure in a cloud shows that vapors of a material present danger to your
life or health.
xiv
MX-9325
GENERAL INFORMATION
MX-9325
TRANSCEIVER
MX-9325
GENERAL INFORMATION
9325-001
Figure 1-1. MX-9325 Transceiver
MX-9325
GENERAL INFORMATION
CHAPTER 1
GENERAL INFORMATION
1.1 INTRODUCTION
This manual provides the technician with all technical information required to support level III maintenance as
described in Appendix B.
The overall intent of this manual is to help the technician expedite repair of the unit in a reasonable amount of
time, resulting in reduced down-time and increased system availability. Detailed information that is useful to the
technician is provided: configuration, specifications, fault isolation, repair, tools, test equipment, and functional
descriptions of the assemblies. A glossary of terms is also provided in Appendix A.
1.2 WARRANTY
For warranty information refer to the inside front cover of this manual.
NOTE
Contractual agreements may supersede standard warranty. Refer
to contract agreement for additional warranty information.
1.3 GENERAL EQUIPMENT DESCRIPTION
1.3.1
MX-9325 Transceiver
Figure 1-1 shows the MX-9325 Transceiver.
The MX-9325 Transceiver is a rack-mounted, fully programmable unit. The MX-9325 Transceiver operates as a
double sideband AM-MSK analog data Transceiver or as a D8PSK digital-data transceiver. The MX-9325
Transceiver yields a 25-Watt power output that covers the frequency range of 118.000 to 136.975 MHz with 25
kHz spacing between channels. All programmable features and functions are controlled via asynchronous serial
port on front panel from a PC or an ASCII terminal. The MX-9325 Transceiver operates from 87 Vac to 265 Vac,
47 Hz to 63 Hz.
The MX-9325 Transceiver represents a new generation of ground-to-air VHF radio equipment to meet the
demanding needs for ATC communications. This advanced MX-9325 Transceiver is designed to operate in two
modes. As a double sideband AM-MSK analog data transceiver, the MX-9325 Transceiver supports the
requirements for a multiple-mode communications radio for ACARS utilizing an MSK modem integral to the
radio providing all modulation/demodulation and CSMA for media access control. As a D8PSK digital-data
transceiver, the MX-9325 Transceiver supports the following operational requirements:
•
Mode 2 ICAO Annex 10, Volume III
•
Mode 3 operation per RTCA SC-172, working group 3 MOPS
•
EUROCAE working group 47 MOPS
The MX-9325 Transceiver is operated from a VHF Ground Computer (VGC) using ACARS software. For more
information on operations, refer to the VGC and ACARS Operations Manual. Locally the VGC interfaces to the
MX-9325 Transceiver Host Port. Remote operations are controlled using a VGC with an optional VHF Extender
Unit. Refer to Paragraph 1.3.2 for VHF Extender Unit description. The Extender Unit is also required for split site
configuration (MX-9325 Transceiver installed as a separate transmitter and receiver function). Remote control is
via an RS-422 electrical connection using a baud rate up to 192 k baud programmable from the VGC.
1-1
MX-9325
GENERAL INFORMATION
The MX-9325 Transceiver maintains three non-volatile storage areas called Software Banks, to hold downloaded
software data. At any time, two of the banks are considered active and contain valid copies of the MX-9325
Transceiver operating software. This enables the radio to execute the most recent downloaded version of its
software, or to switch to a previously downloaded version via instruction from the VGC. When a MX-9325
transceiver is shipped from the factory, it contains identical versions of software in all software banks, although
only two banks are regarded as containing active software versions.
Another feature of the MX-9325 Transceiver is its BIT capability. BIT self-test routine diagnoses and isolates
faults within the MX-9325 Transceiver to the assembly level. Faults are reported to the MX-9325 Transceiver
front panel fault LED. The fault code is diagnosed at a PC or ASCII terminal connected to the front panel
mounted maintenance port or from the VGC using a BIT command. This feature helps to quickly test and repair
the transceiver. Within the MX-9325 Transceiver BIT, it continuously monitors power supply output, synthesizer
lock status, receiver sensitivity and the PA temperature.
1.3.2
VHF Extender Unit (optional)
Figure 1-2 shows the VHF Extender Unit. The VHF Extender Unit is required for remote and split site
configurations.
The VHF Extender Unit is rack mounted and consists of 14 plug-in card modules and two fused power supplies to
accommodate inputs of 115 or 230 Vac. The VHF Extender Unit is designed to interface signal or multiple
Transceivers to the VGC and to an optional 4 by 4 antenna relay switch that automatically switches the VGC to a
reserved MX-9325 Transceiver during a disabling fault situation.
Using the VHF Extender Unit, the receivers channel busy and the transmitter’s receiver mute differential signal
output lines are extended to the remote site by means of a current loop interface circuit, capable of driving the
required maximum length of hard wire lines between sites. Refer to Chapter 3 for MX-9325 Transceiver
configuration. Refer to Chapter 8 for system interconnect diagrams.
The VHF Extender Unit specifications are included in Table 1-3.
1.3.2.1
VHF Extender Unit Plug-in Module Cards
The VHF Extender Unit uses three types of plug-in module cards. The type and quantity depend on the MX-9325
Transceiver system configuration. The following are the plug-in module card types and configuration when used:
•
•
•
1-2
EIA-530 Modem - A high speed, short range synchronous COTS data modem card. The EIA-530 Modem
is required for each MX-9325 Transceiver to communicate in remote site configuration, quantity 14
maximum. The EIA-530 Modem is utilized to extend the Host Port EIA-serial data interface between the
local site computer or MX-9325 Transceiver and remote site MX-9325 Transceiver.
Discrete I/O Card - A circuit card containing two (2) discrete control line level converters. The Discrete
I/O Card is required along with each EIA-530 Modem for split site MX-9325 Transceiver configuration,
quantity seven (7) maximum of discreet I/O cards with seven (7) maximum EIA-530 Modems. The
Discrete I/O Card is utilized to extend the transmit mute and receiver channel busy signals between local
and remote site MX-9325 Transceivers to support ACARS and Mode 2 operation. Each board has an
EIA-422 signal level input and output (TX/RX) which is converted to and from differential 20 mA loop
levels for transmission over the intersite lines.
RS-232 Modem - A low speed, short-range asynchronous COTS data modem card. Required for each
optional antenna relay switch installed. One (1) antenna relay switch accommodates eight (8)
transceivers. The RS-232 Modem is utilized to extend EIA-232 Serial data between VGC and multiple
Transceivers to a 4 by 4 antenna relay switch that automatically switches the VGC to a reserved
MX-9325 Transceiver during a disabling fault situation.
MX-9325
GENERAL INFORMATION
Refer to Table 1-2 for additional VHF Extender Unit configuration information.
1.3.3
MX-9325 Transceiver Front Panel
See Figure 1-1. The MX-9325 Transceiver front panel provides serial connector for maintenance interface. Also
provided on the front panel, on/off switch, status indication LEDs, reference oscillator test connection and an
accessory connector.
1.3.4
MX-9325 Transceiver Rear Panel
Refer to Chapter 8, Figure 8-2. The MX-9325 Transceiver rear panel provides AC power connector, antenna (RF)
connection, discrete I/O port, extender port, and host (data) port.
1.3.5
VHF Extender Unit Rear Panel
Refer to Chapter 8, Figure 8-3. The VHF Extender Unit rear panel provides 14 snap type terminal block
transmission line connections, 14-dB 25 female data interface connections.
1-3
MX-9325
GENERAL INFORMATION
9325–002
Figure 1-2. VHF Extender Unit
1-4
MX-9325
GENERAL INFORMATION
1.3.6
Mounting
The MX-9325 Transceiver and VHF extender unit are designed to be rack mounted. Refer to Chapter 6 and
Chapter 8 for installation information.
1.3.7
MX-9325 MX-9325 Transceiver Configuration Information
Table 1-1 identifies the MX-9325 Transceiver configuration and part number described in this manual. Table 1-2
identifies the VHF extender unit configurations and part numbers described in this manual. Refer to Chapter 7 for
family tree. For firmware revision of this manual, refer to the title page that appears just after the warranty inside
the front cover.
Table 1-1. MX-9325 Transceiver Configurations
Product
Description
MX-9325
1.3.8
Part Number
VHF Multimode Transceiver
12007-1000-01
VHF Extender Unit Configuration Information
Table 1-2 identifies the VHF extender unit configurations and part numbers described in this manual. Column one
(1) lists the part number with the last two (2) digits being the number of MX-9325 Transceivers supported. Refer
to Chapter 7 for the family tree. For firmware revision of this manual, refer to the title page that appears just after
the warranty inside the front cover.
Table 1-2. VHS Extender Unit Configurations
Part Number
VHF Extender Unit
Configuration Description
Qty
Slot
of
Position
EIA-530 in use
Modem
by
EIA-530
Modem
Qty
of
I/O
Card
Slot
Position
in use
by
I/O
Card
Qty of
RS-232
Modem
Slot
Position
in use
by
RS-232
Modem
12007-6000-001 Remote or Split Site 1 XCVR
Thru
Thru
12007-6000-014 Remote or Split Site 14 XCVR’s
thru
14
thru
14
Thru
Thru
Thru
Thru
12007-6000-101 Remote Site 1 XCVR 1 Ant. Sw.
Thru
Thru
12007-6000-108 Remote Site 8 XCVR’s 1 Ant. Sw.
12007-6000-109 Remote Site 9 XCVR’s 2 Ant. Sw.
Thru
Thru
Remote
Site
12
XCVR’s 2 Ant. Sw.
12007-6000-112
thru
thru
12
thru
thru
12
Thru
Thru
Thru
Thru
Thru
Thru
14
Thru
14
13,14
Thru
13,14
12007-6000-201 Split Site 1 XCVR
Thru
Thru
12007-6000-207 Split Site 7 XCVR’s
thru
thru
1,3,5,7,9,
11,13
Thru
Thru
2,4,6,8,
10,12,14
Thru
Thru
12007-6000-301 Split Site 1 XCVR 1 Ant. Sw.
Thru
Thru
12007-6000-306 Split Site 6 XCVR’s 1 Ant. Sw.
thru
thru
1,3,5,
7,9,11
Thru
Thru
2,4,6,8,10
,12,14
Thru
14
Thru
14
1.3.8.1
MX-9325 Transceiver Unit Identification
MX-9325 Transceiver identification information is located on the front panel identification tag.
1-5
MX-9325
GENERAL INFORMATION
1.3.8.2
VHF Extender Unit Identification
VHF Extender Unit Identification is located TBD.
1.4 ADDITIONAL ITEMS SHIPPED WITH UNIT
The MX-9325 Transceiver is shipped with an ancillary kit which is listed in Chapter 7, Paragraph 7.4.4.
1.5 REFERENCE DOCUMENTS
Refer to the following documents for additional information on the OEM VHF Extender Unit.
•
•
•
RAD Data Communications Publication No. 601-200-04/99, ASM-20 Synchronous/Asynchronous Short
Range Modem Installation and Operation manual, April 1999.
RAD Data communications Website, www.rad.com, September 1999.
Electronics Industries Association, EIA-530 Standard: High Speed 25-position Interface for Data
Terminal Equipment and Data circuit-Terminating Equipment, 18 March 1987.
•
Black Box Corporation, 256-kbps Line-Driver (LDM-256) Cards User Manual, August 1997.
•
Black box Corporation, Racknest 2/14 User Manual, March 1997.
•
Black Box Corporation, LDM-MR19.2 User Manual, April 1998.
1.6 RECOMMENDED TOOLS AND TEST EQUIPMENT
Tools and test equipment recommended for installing, troubleshooting, and repairing the MX-9325 Transceiver
are listed in Chapter 7, Paragraph 7.3.
1.7 SPECIFICATIONS
Refer to Table 1-3 for MX-9325 Transceiver specifications.
Table 1-3. MX-9325 Transceiver Specifications
Function
Frequency Range
Frequency Tolerance
Channel Spacing
Tuning Time
Receive to Transmit Turnaround
Transmit to Receive Turnaround
EMI/EMC Approvals
Safety Agency Approvals
BIT
Data Interface
Modes
1-6
Specification
GENERAL
118 MHz to 136.975 MHz
1 PPM, –20C to +55C, aging 1 ppm per year maximum
25 kHz
100 ms from the receipt of the last bit of the frequency change
command.
1 ms after terminating the receive function
1 ms after terminating the final information
BZT, CE OFCOM and U.S. FCC Class B Operation
CSA, UL, BSI
DC power supplies, PA temperature, synthesizer lock, receiver
sensitivity
Data Port: RS-422 synchronous, rear panel DB-25 with RS-530
connector definition
Maintenance Port: RS-232 asynchronous, up to 192 kbps, via front
panel DB-9 female connector
AM-MSK : Per ARINC Specification 618-2
Mode 2: Per ICAO Annex 10
Mode 3: Per RTCA SC-172 WG3 MOPS
MX-9325
GENERAL INFORMATION
Table 1-3. MX-9325 Transceiver Specifications – Continued
Function
Channel Statistics
Output Power
VSWR
Duty Cycle
Harmonic and Spurious Emissions
Adjacent Channel Power and Wideband Noise
Transmitter Time-out Time
Transmitter Keying
RF Power Rise time
RF Power Release Time
Data Rate
Transmitter Pre-key
Transmitter Phase and Amplitude
Balance
Transit Delay
Frequency Response
Differential Phase Delay
Audio Distortion
Modulation Level
Internal Test Signals
Digital Interface, Data (J3)
Sensitivity
IF Selectivity
Adjacent Channel Rejection
Spurious Radiation
Rejection of Signals in the VHF
Band
Rejection of Signals outside the
VHF Band
In-Band Signal Rejection
FM Broadcast Intermodulation
Specification
SNR,RSSI, Pre-key value, message duration, cumulative receive time,
cumulative standby time.
TRANSMITTER
MSK: 25 Watts adjustable from 5 to 25 Watts via maintenance port
D8PSK: 25 Watts average
No degradation for up to 2:1; no damage from infinite VSWR
50% Continuous
- 80 dBc minimum for all modes
MSK: -70 dBc minimum;
D8PSK: Per ICAO Annex 10
5 to 60 seconds, adjustable
Via maintenance port for installation setup and test
Less that 190 µs (two symbols)
Within 190 µs after transmitting the final information symbol
MSK: 2400 bps
D8PSK: 31.5 kilobits per second ± 0.005%
0 to 190 msec, adjustment via maintenance port 85 msec default
D8PSK: 90± 3 degrees phase, and ± 1 dB amplitude maximum
MSK: 10 mS maximum
MSK: 200 Hz to 3600 Hz ± 2 dB
MSK: 20 µS
MSK: 5%
MSK: adjustable 30 to 95% via maintenance port
MSK: 1200 or 2400 Hz individual; random sequence of 1200 Hz and
2400 Hz; 1 kHz
D8PSK: CW carrier, continuous random data
RS-232 or RS-422
RECEIVER
MSK: - 99 dBm for 10 dB SINAD, 30% AM with 1 kHz modulation
signal;
D8PSK: - 103 dBm for 10– uncorrected BER
- 6 dB at ± 10kHz; - 80 dB at ± 25 kHz
44 dB minimum for 10– uncorrected BER (per EUROCAE MOPS)
80 dB minimum
For -3 dBm interferer (Fi) removed from desired 450 ≤ (Fi) ≤ 2000
kHz, less than 3 dB SINAD degradation;
For 0 dB interferer (Fi) removed from desired Fi ≤ 2 MHz, less that
3 dB SINAD degradation
For signal interferer 0 dB or less within FM broadcast band, no SINAD
degradation.
70 dB minimum for interfering signals spaced greater that 100 kHz
from desired.
For two interfering signals 0 dB or less within FM broadcast band, no
SINAD degradation.
1-7
MX-9325
GENERAL INFORMATION
Table 1-3. MX-9325 Transceiver Specifications – Continued
Function
Noise Rejection
Desired Signal Dynamic Range
Symbol Rate Capture Range
Frequency Capture Range
Doppler Rate
Co-Channel Interference
Conducted Spurious Emission
Cross Modulation
Transit Delay
AGC Attack Time
AGC Release Time
Squelch Disable
Loudspeaker
Receiver Mute
Signal Quality Output (RSSI)
Maximum RF Input
AS Power Requirements
DC Power Requirements
Input Power Consumption
Operating Temperature
Humidity
Storage Temperature
Altitude
Self Test
MTBF
MTTR
Size
Weight
Specification
For -157 dBm/Hz AWG noise input and -95 dBm desired, 10–
uncorrected BER minimum
+ 10 to – 103 dBm for 10– corrected BER
60 parts per million minimum for 10– uncorrected BER
± 965 Hz minimum for 10– uncorrected BER
±18 Hz/s minimum for 10– uncorrected BER within ± 140 Hz Doppler
shift range
–20 dB for 10– uncorrected BER
–64 dBm maximum 50 kHz to 1215 MHz
60 dB for interferer (Fi) removed from desired 25 ≤ Fi ≤ 1000 kHz
80 dB for interferer (Fi) removed from desired Fi > 1 MHz
MSK: 10 ms maximum
MSK: 7.5 ms maximum
MSK: 7.5 ms maximum
Internal, via maintenance port
External, handset via maintenance port jack
internal, via maintenance port
Reported to GSC via ACARS message format
5 Vrms minimum without damage
87 to 265 Vac 47 Hz – 63 Hz
POWER
None
250 Watts
ENVIRONMENTAL
–20C to +55C
Up to 95% Non-Condensing
–40C to + 70C
10,000 ft
RELIABILITY/MAINTAINABILITY
BITE
>50,000 Hours
<15 Minutes
MECHANICAL
5.25 H x 18.5 L x 19.0 W inches
(13.36 H x 45.72 D x 48.26 W centimeters)
35 lbs
(15.4 kg)
Table 1-4. VHF Extender Unit Specifications
Function
Physical Dimensions
1-8
Specification
OEM CHASSIS ASSEMBLY
7” H x 19” W x 10” D (17.8 cm H x 48.3 cm W x 25.4 cm D) Fits
standard 19” rack, 4 rack units high.
MX-9325
GENERAL INFORMATION
Table 1-4. VHF Extender Unit Specifications – Continued
Function
Capacity
Power Supply
Temperature
Humidity
Certifications
Diagnostics
Specification
14 slots for circuit cards, 2 slots for non-interchangeable power supply
cards
115 Vac ± 10%, 47 - 63 Hz
230 Vac ± 10%, 47 - 63 Hz
0° - 50°C (32° - 122°F)
10 to 90%, non-condensing
CE, UL
EIA-530 MODEM
Local Digital Loopback: Activated by a manual switch (DIG)
Remote Digital Loopback: Activated by manual switch (REM) or
RL pin 21 of the EIA-530 I/F (per V.54, Loop 2)
Local Analog Loopback: Activated by manual switch (ANA) or
LL Pin 18 of the EIA-530 I/F (per V.54, Loop 3)
Function
Connectors
Power Consumption
Temperature
Humidity
Maximum Altitude
Certifications
Function
Physical Dimensions
Weight
Transmission Line I/F
Output Signal
Digital Interface
Signal Rates
Transmission Delay
Diagnostics
Alarm Output
Alarm Reset Input
Connectors
Power Consumption
Temperature
Specification
Male Board Edge connector, 44 pin (38 contact), mates with chassis slot
connector
5 watts
0° - 50°C (32° - 122°F)
10 to 90%, non-condensing
8000 ft. (2438.4m)
FCC Class A
Specification
DISCRETE I / O CARD
6.2” H x 1” W x 9.1” D (15.7 cm H x 2.5 cm W x 23.0 cm D)
8 oz. approx.
Unloaded twisted pair, 19 to 26 AWG
20 mA loop, in a differential configuration
2x RS-422 Balanced pairs, TX, 1 RX
1000 pps maximum
Dependent on characteristics of Intersite Transmission line
typical 50µsec
Receive Loop fail indication - with front panel LED and Alarm contact
closure.
Bi-directional Solid State relay, NO or NC strap configuration
Output On resistance = 1Ω normal
Maximum Output Current = < 250 mA
Maximum Output Voltage = 55 Vdc
Input/Output Insulation Voltage = 2500 VAC Maximum
Contact closure (TTL compatible)
Male Board Edge Connector, 44 pin (38 contact), mates with chassis slot
connector
< 100 mA from Chassis supply
0° - 50°C (32° - 122°F)
1-9
MX-9325
GENERAL INFORMATION
Table 1-4. VHF Extender Unit Specifications – Continued
Function
Humidity
Alternate Source
Physical Dimensions
Weight
Transmission Line I/F
Transmit Level
Transmit Impedance
Receive Impedance
Return Loss
Carrier
Modulation
Digital Interface
Data Rates, Sync / Async
RTS/CTS Delay
Data Word Length
Stop Bits
Timing Elements
Diagnostics
Specification
10 to 90%, non-condensing
RS-232 MODEM
Unloaded twisted pair, 19 to 26 AWG
20 mA loop, in a differential configuration
2x RS-422 Balanced pairs, TX, 1 RX
1000 pps maximum
Dependent on characteristics of Intersite Transmission line
typical 50µsec
Receive Loop fail indication - with front panel LED and Alarm contact
closure.
150, 300, 600Ω, or HIGH, strap selectable
> 15 dB
Controlled by RTS or constantly ON
Conditioned differential di-phase EUROCOM Standard D1
V.24/RS-232D (EIA-232)
19.2 kbps (other rates include 1.2, 2.4 3.6, 4.8, 7.2, 9.6 and 14.4 kbps)
0, 8, 64 milliseconds, switch selectable
8, 9, 10 11 bits
1, 1.5, 2 bits
Receive Clock is derived from the receive signal; Transmit Clock is
derived from 3 alterative source: Internal oscillator, External from DTE,
or Loop Clock derived from the receive signal.
Local Digital Loopback: Activated by a manual switch (DIG)
Remote Digital Loopback: Activated by manual switch (REM) or
RL pin 21 of the RS-232 I/F (per V.54, Loop 2)
Connectors
Power Consumption
Temperature
Humidity
Certifications
Local Analog Loopback: Activated by manual switch (ANA) or
LL Pin 18 of the RS-232 I/F (per V.54, Loop 3)
Male Board Edge Connector, 44 pin (38 contact), mates with chassis
connector
3 watts
0° - 50°C (32° - 122°F)
up to 90%, non-condensing
FCC Part 15, Subpart J Class A
NOTE
Because Harris engineers continuously strive to improve all
aspects of Harris equipment, specifications are subject to change
without notice.
1-10
MX-9325
OPERATION
CHAPTER 2
OPERATION
2.1 INTRODUCTION
This chapter contains information necessary for operation of the MX-9325 Transceiver at the intermediate
maintenance level. This information consists of operator controls and indicators, and operating instructions. A
description of the front panel controls, indicators, and connectors is provided in Paragraph 2.2. Basic operating
procedures are provided in Paragraph 2.3. Setup and programming procedures are provided in Chapter 3.
2.2 FRONT PANEL CONTROLS, INDICATORS, AND CONNECTORS
Figure 2-1 shows the controls, indicators, and connectors on the MX-9325 Transceiver front panel. Table 2-1
describes the controls, indicators, and connectors.
Figure 2-2 shows the controls and indicators on the VHF Extender Unit front panel. Table 2-2 describes the
controls and indicators.
2-1
MX-9325
OPERATION
FRONT VIEW
9325-003
Figure 2-1. Front Panel Controls, Indicators, and Connectors
Table 2-1. Front Panel Controls, Indicators, and Connectors
Key
(Fig 2-1)
Control/Indicator
Function
Power ON/OFF Switch
Maintenance Port
Frequency Reference Oscillator
Accessory connector
Fault LED
Transmit LED
Receive LED
AC Power LED
Product Identification Tag
Used to power MX-9325 Transceiver on or off.
Used for local control and setup of transceiver.
Test – used to measure and calibrate MX-9325 Transceiver reference oscillator.
Used to test receive and transmit audio parameters in MSK
mode.
Lights when internal fault is detected.
Lights when MX-9325 Transceiver is transmitting data.
Lights when MX-9325 Transceiver is receiving data.
Lights when MX-9325 Transceiver is powered on.
Contains MX-9325 Transceiver part number and serial number.
2-2
MX-9325
OPERATION
Figure 2-2. VHF Extender Unit
9325-004
9325–004
Table 2-2. VHF Extender Unit Controls, Indicators, and Connectors
Key
(Fig 2-2)
Control/Indicator
PWR
RTS
EIA-530 Modem
EIA-530 Modem - LED
EIA-530 Modem – LED
TD
EIA-530 Modem - LED
RD
EIA-530 Modem - LED
DCD
EIA-530 Modem - LED
Function
High Speed Modem
Lights Green when modem power is on.
Lights Yellow when terminal (DTE) activates the
Request-to-Send line.
Lights Yellow when SPACE is being transmitted. Flickers as data
is transmitted.
Lights Yellow when steady SPACE is being received. Flickers as
data is received.
Lights Yellow when a valid receive signal is present.
2-3
MX-9325
OPERATION
Table 2-2. VHF Extender Unit Controls, Indicators, and Connectors – Continued
Key
(Fig 2-2)
TEST
EIA-530 Modem - LED
ERR
EIA-530 Modem - LED
RPF
EIA-530 Modem - LED
DIG
EIA-530 Modem - LED
ANA
EIA-530 Modem - Pushbutton
REM
EIA-530 Modem - Pushbutton
switch
PATT
EIA-530 Modem - Pushbutton
switch
RPF
EIA-530 Modem - RESET
Pushbutton switch
Discrete I/O Card
Discrete I/O Card - LED
Discrete I/O Card - LED
Discrete I/O Card - LED
Discrete I/O Card - LED
Discrete I/O Card - Pushbutton
switch
RS-232 Modem
RS-232 Modem - LED
RS-232 Modem - LED
PWR
TX
RX
ALM
RESET
RTS
PWR
2-4
Control/Indicator
TD
RS-232 Modem - LED
RD
RS-232 Modem - LED
DCD
RS-232 Modem - LED
Function
Lights Red when the modem is in any one of the three Loopback
modes - DIG, ANA, REM, or when the PATT pushbutton is
depressed.
Lights Yellow momentarily when PATT switch is activated and
then goes out. If there are errors in the test pattern, the LED blinks
or remains lit.
Lights when there’s a power failure in remote standalone unit.
May be reset by depressing the red RPT reset pushbutton.
The Digital loopback switch causes the local modem to loop
received data and clock back to its transmitter. Data set ready will
turn off.
The Analog Loopback switch causes the local modem to loop its
transmitter output back to its receiver. This Loopback may also be
activated from the DTE per V.54, Loop 3- Local Loopback, via
pin 18 on the EIA-530 D sub-connector interface.
The Remote Signal Loopback switch causes the remoted EIA-530
modem to loop received data and clock to its transmitter. Data set
Ready will turn off. This loopback may be also activated from the
DTE per V.54, Loop 2 – Remote Loopback, via pin 21 on the
EIA-530 D sub-connector interface.
The pattern switch causes the EIA-530 modem to send and receive
a 511-bit test pattern. If errors are encountered by the receiver, the
ERR LED will light or flicker. The RD and CTS will turn off.
NOTE
The modem must be set to constant carrier, or if set to switched
carrier the RTS signal must be asserted (high) for the test to work.
When pushed will reset the ERR LED.
Lights Green when Discrete I/O Card power is on.
Lights Yellow when transmit discrete line signal is asserted.
Lights Yellow when receive discrete line signal is asserted.
Lights Red when circuit does not receive a valid signal for > 10 ms
When pushed, will reset the ALM LED.
Low Speed Modem
Lights Green when RS-232 power is on.
Lights Yellow when terminal (DTE) activates the
Request-to-Send line.
Lights Yellow when SPACE is being transmitted. Flickers as data
is transmitted.
Lights Yellow when SPACE is being received. Flickers as data is
received.
Lights Yellow when a valid receive signal is present.
MX-9325
OPERATION
Table 2-2. VHF Extender Unit Controls, Indicators, and Connectors – Continued
Key
(Fig 2-2)
Control/Indicator
TEST
RS-232 Modem- LED
RPF
RS-232 Modem - LED
DIG
RS-232 Modem Pushbutton
Switch
ANA
RS-232 Modem - Pushbutton
Switch
REM
RS-232 Modem - Pushbutton
Switch
RPF
RS-232 Modem - RESET
Pushbutton Switch.
Power Supply
Power Supply
Function
Lights Red when the modem is in any one of the three Loopbac k
modes DIG, ANA, or REM.
Lights Red and indicates power failure in remote standalone units.
May be reset by depressing the red RPT reset pushbutton.
Digital Loopback Switch. When pushed, causes the local modem
to loop received data and clock back to its transmitter. Data set
ready will go low.
Analog loopback switch, when pushed will cause the local modem
to loop its transmitter output back to its receiver. This loopback
may also be activated from the DTE per V.54, Loop 3- Local
Loopback, via pin 18 on the RS-232 D sub-connector interface.
Remote Digital Loopback Switch, when pushed will cause the
remote RS-232 modem to loop received data and clock to its
transmitter. Data Set Ready will go low. This loopback is also
activated from the DTE per V.54, Loop 2 – Remote Loopback, via
pin 21 on the RS-232 D sub-connector interface.
When pushed, will reset the RPF LED.
115 Vac Power Supply
230 Vac Power Supply
2.3 BASIC OPERATION
Before operating, the MX-9325 transceiver and VHF Extender Unit must be installed per Chapter 8 and
configured per Chapter 3. The following paragraphs provide basic operating procedures of the MX-9325
Transceiver and VHF Extender Unit.
2.3.1
Initial Settings and Power Up
Initial settings and power up consists of powering up the transmitter and running BIT. Table 2-3 provides the
initial settings and power up procedure.
NOTE
The  following each command means that an ASCII CR
(carriage return) is sent to the transmitter microcontroller which
causes the command to be executed.
2-5
MX-9325
OPERATION
Table 2-3. Initial Settings and Power Up Procedure
Step
Control
Action
Transmitter rear panel
J104 Antenna Connector
POWER switch on the PC Place switch in the ON position.
or terminal.
Observe
Connect Antenna or a 50-Ohm/100 W
RF Attenuator.
The PC boots or terminal
powers on.
Refer to the PC or terminal
operation instructions for
more information.
If using a PC, run the desired terminal The PC runs the terminal
emulation program. Refer to Chapter 3 emulation program.
Paragraph 3.2.1.
Refer to software operation
instructions for more
information.
Ensure that the terminal or terminal
emulation program communication
parameters are correctly configured,
as described in Chapter 3, Paragraph
3.2.1.
Place switch in the ON position.
POWER switch on the
transmitter.
Refer to software operation
instructions for more
information.
The front panel AC power
indicator LED lights and the
PC or terminal displays the
initial power up screen. See
Figure 2-1.
If the PC or terminal does not
display the initial power up
screen, refer to Chapter 5,
Paragraph 5.2.3.
PC or terminal keyboard
Type bit v .
The transmitter executes all
BIT tests, then displays the
results on the PC or terminal.
If a BIT fault is detected, refer
to Chapter 5 Paragraph 5.2.2.
2.3.2
MX-9325 Transceiver Operation
The MX-9325 Transceiver is operated by means of a VGC. The transceiver’s rear panel mounted host port
provides the interface. The communications protocol is the LAPB, variant of the HDLC protocol. The VGC is
linked to the MX-9325 Transceiver rear panel HOST port for local operation or to the rear panel EXTENDER
port for remote or split site (two transceivers used as separate receiver and transmitter) operation via a VHF
extender unit. All operations are performed from the VGC using ACARS, Mode 2 and management software
packages. Refer to the VGC and software operations manual for operating information.
2-6
MX-9325
PROGRAMMING/SETUP
CHAPTER 3
PROGRAMMING/SETUP
3.1 INTRODUCTION
This chapter provides information required to setup and configure the MX-9325 Transceiver.
The MX-9325 Transceiver should be powered up and pass BIT fault isolation before setup or configuration
procedures are performed. Refer to Chapter 2.
3.2 SETUP
The following provides instructions on configuration and setup of the MX-9325 Transceiver. These are generally
performed once during installation.
Setup and configuration maintenance commands are performed locally using a PC or ASCII terminal attached to
the MX-9325 Transceiver front panel mounted maintenance port.
WARNING
Voltages hazardous to human life are present if Maintenance
commands are not performed properly. Failure to preform
Maintenance commands properly can cause Injury or death to
personnel.
CAUTION
Maintenance commands are intended for maintenance personnel
only. Failure to perform maintenance commands properly could
cause equipment damage.
The following paragraphs describe access levels, setup and configuration commands performed locally from
the MX-9325 Transceiver maintenance port.
3.2.1
Terminal Emulation Software Configuration
The PC running terminal emulation software or the terminal that is connected to the transmitter (rear panel J1
MAINTENANCE connector) must be configured as follows:
•
19,200 baud rate
•
8 data bits
•
1 start bit
•
1 stop bit
•
No parity
Refer to the operation documentation supplied with the terminal or terminal emulation software for more
information.
3-1
MX-9325
PROGRAMMING/SETUP
NOTE
Ensure that the correct Comm. Port (i.e. Comm. 1) on the PC is
selected to correspond with the connection to the MX-9325
Transceiver J1 connector.
3.2.2
Access Levels
The MX-9325 Transceiver can be accessed at the following levels:
•
Monitor Level
•
Maintenance Level
•
Off-line Level
In Monitor level, the maintenance port user can view various radio operational and configuration parameters.
In Maintenance level, the maintenance port user can modify various operational and configuration parameters. All
host computers connected through the host port are prohibited from changing any operational and configuration
parameters until the maintenance port returns to monitor access. The host port will continue the ability to transmit
and receive data in the access level.
In Off–line level, the maintenance port user has the same restrictions as when the user has maintenance level
access. In addition, the radio cannot accept data from the host for transmission, and cannot forward to the host
port any data that is received off-the-air.
3.2.3
Changing Access Levels
The following paragraphs describe how to change the MX-9325 Transceiver access levels.
3.2.3.1
Monitor Level
To place the MX-9325 Transceiver into Monitor Level, type the following command on the PC/Terminal:
PWD 
3.2.3.2
Maintenance Level
To place the MX-9325 Transceiver into Maintenance Level, type the following command on the PC/Terminal:
PWD Maintenance 
3.2.3.3
Off-line Level
To place the MX-9325 Transceiver into Offline Level, type the following command on the PC/Terminal:
PWD No RF 
3.2.4
Configuration Index
Table 3-1 lists the configuration index for the MX-9325 Transceiver. Column 1 contains the command as would
be typed on the PC/Terminal. Column 2 contains the brief descriptions of the command. Columns 3, 4 and 5
contain the access level the command can be performed at. Column 6 contains a reference to the paragraph that
describes the command in detail.
3-2
MX-9325
PROGRAMMING/SETUP
Table 3-1. MX-9325 Transceiver Configuration Index
Command
Operation Procedure
Monitor
Maintenance
Offline
Paragraph
BIT
FRQ
Display BIT results.
Display/Modify the current radio operating
frequency.
Display a history of PBIT and CBIT faults
that have occurred since the last time the
historical BIT status word was cleared.
Display the revision of each assembly in the
MX-9325 Transceiver.
Display radio power supply voltages.
Change current access level.
Display/Modify the current transmitter
output power level.
Display the radio operational status.
Display the Voltage Standing Wave Ratio
measured during the last transmission.
Display the power amplifier and power supply heatsink temperatures.
Display the version identifiers of the active
and back-up software images currently
resident in the radio.
Display the forward power level of the last
transmission.
Display the detailed BIT results for each
assembly in the radio.
Display/Modify the current transmitter key
state.
Display/Modify the modulation level set
point.
Display the reverse power level of the last
transmission.
Display/Modify the TCXO adjustment
value.
Display/Modify transmitter continuous key
time-out interval.
Display/Modify radio system
configuration.
Display/Modify current operating mode.
Generate a test tone.
3.2.4.1
3.2.4.2
3.2.4.3
3.2.4.4
Display/Modify the local maintenance port
baud rate and parity settings.
Display/Modify the host data port baud rate
setting.
HIS
HWV
PSU
PWD
PWR
STA
SWR
TMP
VER
FPW
DBT
KEY
MDL
RPW
TCO
TIM
SYC
MOD
TTO
MPS
DPS
3.2.4.5
3.2.4.6
3.2.4.7
3.2.4.8
3.2.4.9
3.2.4.10
3.2.4.11
3.2.4.12
3.2.4.13
3.2.4.14
3.2.4.15
3.2.4.16
3.2.4.17
3.2.4.18
3.2.4.19
3.2.4.20
3.2.4.21
3.2.4.22
3.2.4.23
3-3
MX-9325
PROGRAMMING/SETUP
Table 3-1. MX-9325 Transceiver Configuration Index – Continued
Command
Operation Procedure
Monitor
Maintenance
Off-line
Paragraph
RST
CLF
Reset the radio.
Clear the BIT fault word and detailed BIT
fault words for all assemblies.
Clear the historical BIT status word.
Run the receiver sensitivity test.
Display/Modify the Mode 2 maximum
number of channel access attempts
parameter value.
Display/Modify Mode 2 link level address.
Display/Modify the Mode 2 persistence
numerator parameter value.
Display/Modify the Mode 2 inter-access
delay timer parameter value.
Display/Modify the Mode 2 channel busy
timer time-out parameter.
Display/Modify the ACARS channel busy
time-out parameter value.
Display/Modify uplink filtering enable/
disable state.
Display/Modify downlink filtering enable/
disable state.
Display/Modify RSSI filtering enable/
disable state.
Display/Modify RSSI filtering threshold
value.
Display ACARS or Mode 2 statistics,
depending on current mode.
Display/Modify Category B mode filter
character.
Display/Modify the radio serial number.
Display/Modify the LAP-B parameters.
Display the number of overruns.
Display the number of overruns and reset
the number to zero.
Purge the messages and display the
number that were purged.
Display/Modify the print software error
log enabled/disabled flag.
Display the software error log.
Display the commands available at the
current access level.
Display the Tx VCO lock state.
3.2.4.24
3.2.4.25
3.2.4.26
3.2.4.27
3.2.4.28
3.2.4.29
3.2.4.30
3.2.4.31
3.2.4.32
3.2.4.33
3.2.4.34
3.2.4.35
3.2.4.36
3.2.4.37
3.2.4.38
3.2.4.39
3.2.4.40
3.2.4.41
3.2.4.42
3.2.4.43
3.2.4.44
3.2.4.45
3.2.4.46
3.2.4.47
3.2.4.48
CLH
SEN
ACC
ADL
PER
TM1
TM2
CBT
UPF
DNF
RSF
RFT
ACS
CBF
SER
LPB
OVN
OVZ
PRG
ELP
ERR
HELP
TVLS
3-4
MX-9325
PROGRAMMING/SETUP
Table 3-1. Transmitter Operation Index – Continued
Command
Operation Procedure
Monitor
Maintenance
Offline
Paragraph
RVLS
Display the Rx VCO lock state.
3.2.4.49
BFLS
LOLS
Display the BFO PLL lock state.
Display the LO PLL lock state.
3.2.4.50
3.2.4.51
3.2.4.1
BIT – Display Current BIT Results
Display the current BIT fault code in hexadecimal format using the bit command. Refer to Chapter 5,
Paragraph 5.2.2 for a list of all BIT fault codes.
3.2.4.2
FRQ – Display or Modify the Current Radio Operating Frequency
Entering the command frq displays the current frequency in Hz.
Entering the command frq followed by a  and a valid frequency value in Megahertz will change the
MX-9325 Transceiver operating frequency to the specified value.
If an attempt to change the operating frequency to a value less than 118.000 or greater than 136.975, the
MX-9325 Transceiver rejects the command by displaying an error indication on the PC/Terminal, and no change
will be made to the operating frequency.
3.2.4.3
HIS – Display a History of BIT Fault Codes
Display a history of BIT fault codes using that have occurred since the last time the BIT status word was cleared
using his.
3.2.4.4
HWV - Display the Revision of each Assembly in the MX-9325 Transceiver
Display the character string containing the revision identifiers of each assembly in the MX-9325 Transceiver
using hwv. The revision identifiers will be displayed in the following order:
•
Digital Processor Board: 12NNN-NNNN-NNX
•
Receiver Board: 12NNN-NNNN-NNX
•
Exciter Board: 12NNN-NNNN-NNX
•
Directional Coupler: 12NNN-NNNN-NNX
•
Power Amplifier: 12NNN-NNNN-NNX
•
High Voltage Power Supply: 12NNN-NNNN-NNX
•
Low Voltage Power Supply: 12NNN-NNNN-NNX
3.2.4.5
PSU – Display MX-9325 Transceiver Power Supply Voltages
Display MX-9325 Transceiver power supply voltages using psu. MX-9325 Transceiver voltages will be
displayed in tenths of a volt, for example +5V: 4.9. If any of the power supply voltages are not present in the
MX-9325 Transceiver, the corresponding value is displayed as 0 V.
3.2.4.6
PWD – Change Current Access Level
Entering the pwd command, followed by the correct level password to access to the Maintenance levels. Refer to
Paragraph 3.2.3 correct password.
3-5
MX-9325
PROGRAMMING/SETUP
3.2.4.7
PWR – Display or Change the Current MX-9325 Transceiver Output Power Level
Display the current MX-9325 Transceiver output power level using pwr command.
Change the MX-9325 Transceiver output power level using pwr followed by the new value in tenths of a watt.
For example, to change the MX-9325 Transceiver to a power output of 15 watts, type pwr 15.0.
3.2.4.8
STA – Display the Radio Operational Status
Entering the command sta displays the MX-9325 Transceiver operational status word in a hexadecimal
format.
3.2.4.9
SWR – Displays Voltage Standing Wave Ratio Measured During the Last Transmission
Display the most recently calculated SWR value using swr. The MX-9325 Transceiver displays with a
resolution of +/–.1.
3.2.4.10 TMP – Display the Power Amplifier and Power Supply Heatsink Temperatures
Display the current power supply and power amplifier heatsink temperatures using tmp command. The
temperatures displays with a resolution of +/–.1 degrees Celsius.
3.2.4.11 VER – Display Active and back-up Software versions
Display the active and back-up software versions stored in the MX-9325 Transceiver memory using ver.
3.2.4.12 FPW – Display the Forward Power Level
Display the MX-9325 Transceiver forward power level of the last transmission using fpw.
3.2.4.13 DBT – Display BIT Results for Each Assembly
Display the MX-9325 Transceiver detailed BIT results for each assembly using dbt.
3.2.4.14 KEY – Display or Change the Current Transmitter Key State
Entering the command key displays the MX-9325 Transceiver’s current transmitter key state as either
“ON” or “OFF.”
Entering the command key followed by a space and either the word “ON” or “OFF” will cause the MX-9325
Transceiver to key or unkey.
3.2.4.15 MDL – Display or Change Modulation Level Set Point
Display the current modulation level set point using the command mdl.
Entering the command mdl followed by a space and a valid modulation present value in decimal will change
the MX-9325 Transceiver modulation level set point.
3.2.4.16 RPW - Display the Reverse Power Level of the Last Transmission
Display the most recently measured reverse power level using the command rpw.
3.2.4.17 TCO - Display or Modify the TCXO Adjustment Value
Display the current MX-9325 Transceivers current TCXO adjustment value using the command tco.
Entering the command tco followed by a space and either + or – will change the TCXO adjustment value to up
one step or down one step, respectively.
3-6
MX-9325
PROGRAMMING/SETUP
3.2.4.18 TIM - Display or Modify Transmitter Continuous Key Time-out Interval
This is the maximum number of seconds the transmitter may be keyed continuously before it will automatically
unkey.
Display the maximum number of seconds of the transmitter continuous key time-out interval using the command
tim.
Entering the command tim followed by a space and a valid time-out value in seconds will change the continuous
key time-out interval.
3.2.4.19 SYC - Display or Modify Radio System Configuration
This defines how the radio is installed and what role it is to play in the communications system it is a part of. The
first command parameter defines what type of radio (MX-9325 Transceiver, transmitter, or receiver) the radio will
operate as. The second command parameter defines whether the radio talks to the host computer directly through
the host data port (Local), or whether it talks to a host computer or another radio via an extender unit through the
extender port (Remote). For a radio acting as a transmitter or receiver, it also defines whether the radio is installed
as a master radio in a split site configuration, and will be communicating with a remote radio as well as with a
host computer.
NOTE
Changing the radio system configuration will cause the radio
to reboot.
Display the radio system configuration using the syc command.
The configuration will be displayed in two parts. The first part as either XC, TX or RX to indicate that the radio is
acting as a MX-9325 Transceiver, transmitter, or receiver, respectively. The second part as either LOC, MAS or
REM to indicate whether the radio is operating in standalone local, split site master, or remote mode, respectively.
Entering the command syc followed by a space and either the word XC, TX or RX followed by a space and either
the word LOC, MAS or REM causes the radio to set it’s system configuration according to the specified
combination.
3.2.4.20 MOD – Display or Modify Current Operating Mode
Display the MX-9325 Transceiver operating mode using the mod command.
Entering the command mod followed by a space and either the word “ACARS” or “M2” will change the
MX-9325 Transceiver operating mode to ACARS or MODE 2.
3.2.4.21 TTO – Generate a Test Tone
Internally generate a 1200 Hz test tone, a 2400 Hz test tone, a random sequence of 1200 Hz and 2400 Hz test
tones, or a 1 kHz test tone while the transmitter is keyed.
Entering the command tto followed by a space and either the word 1000, 1200, 2400 or RAND causes the
MX-9325 Transceiver to continuously transmit a 1000 Hz, 1200 Hz, 2400 Hz, or a random sequence of 1200 Hz
and 2400 Hz tones, respectively.
Entering the command tto followed by a space and the word OFF causes the MX-9325 Transceiver to terminate
any test tone generation and transmission currently taking place. Upon receiving a valid “TTO” command and
parameter, the radio displays the action being taken on the PC/Terminal.
3-7
MX-9325
PROGRAMMING/SETUP
3.2.4.22 MPS – Display or Modify the Maintenance Port Baud Rate and Parity Settings
Display the current Maintenance Port baud rate and parity settings using the command mps.
The radio displays the maintenance port configuration in two parts: the first part as a numerical value to indicate
maintenance port baud rate, and the second part as either O, E, or N to indicate that the maintenance port is set for
Odd, Even, or No parity, respectively.
Entering the command mps followed by a space and a numerical value for the desired baud rate, followed by a
space and either the character O, E, or N shall cause the radio to set its maintenance port baud rate and parity
setting to the specified values.
3.2.4.23 DSP – Display or Modify the Host Data Port Baud Rate Setting
Display the current Host Data Port baud rate setting using dsp command.
Entering the command dsp followed by a space and a numerical value for the desired baud rate, shall cause the
radio to set it’s host data port baud rate to the specified value.
3.2.4.24 RST – Reset the Radio
Entering the command rst causes the radio to reset and go through its power-up initialization sequence.
3.2.4.25 CLF – Clear the BIT Fault Word and Detailed BIT Fault Words for all Assemblies
Entering the command clf causes the radio to clear all current faults by resetting all bits in the BIT fault
word and in the detailed BIT fault words for each assembly.
3.2.4.26 CLH – Clear Historical BIT Status Word
Entering the command clh causes the radio to clear the fault history by resetting all bits in the historical
BIT status word.
3.2.4.27 SEN – Run Receiver Sensitivity Test
Entering the command sen causes the radio to run the receiver sensitivity test.
3.2.4.28 ACC – Display or Modify Mode 2 Maximum Number of Channel Access Attempts
Parameter Value
Display the radio Mode 2 maximum number of channel access attempts parameter value using the acc
command.
Entering the command acc followed by a space and a numerical value for the desired Mode 2 maximum
number of channel access attempts, causes the radio to set the maximum number of channel access attempts
parameter to the specified value.
3.2.4.29 ADL – Display or Modify Mode 2 Link Level Address List
Display the current link level address list, or an indication that the list is empty if there are no addresses in the list
using the command adl.
Entering the command adl followed by a space and a value representing an address to be added to the list, causes
the radio to add the specified value to the address list. If a user attempts to add an address and the list already
contains four addresses, the radio will reject the command by displaying an error indication on the PC/Terminal,
and no change will be to the link level address list.
Entering the command adl followed by a character ‘c’ causes the radio to delete all addresses currently in the list
and indicate on the PC/Terminal that the list is now empty.
3-8
MX-9325
PROGRAMMING/SETUP
3.2.4.30 PER – Display or Modify the Mode 2 Persistence Numerator Parameter Value
Display the Mode 2 persistence numerator parameter value using the per command.
Entering the command per followed by a space and a numerical value for the persistence numerator value,
causes the radio to set the Mode 2 persistence numerator parameter to the specified value. If changing the Mode 2
persistence numerator parameter outside the range 0 to 255 (inclusive), the radio rejects the command by
displaying an error indication on the PC/Terminal, and no change will be made to the persistence numerator
parameter.
3.2.4.31 TM1 – Display or Modify the Mode 2 Inter-Access Delay Timer Parameter Value
Display the Mode 2 inter-access delay timer parameter in half-milliseconds using the tm1 command.
Entering the command tm1 followed by a space and a numerical value for the desired Mode 2 inter-access
delay timer in half-milliseconds, causes the radio to set the inter-access delay timer parameter to the specified
value. Changing the Mode 2 inter-access delay timer outside the range 1 to 250 (inclusive), the radio rejects the
command by displaying an error indication on the PC/Terminal, and no change will be made to the inter-access
delay timer parameter.
3.2.4.32 TM2 – Display or Modify the Mode 2 Channel Busy Timer Time-out Parameter Value
Display the Mode 2 channel busy timer time-out parameter in seconds using the tm2 command.
Entering the command tm2 followed by a space and a numerical value for the desired Mode 2 channel busy
timer time-out value in seconds, causes the radio to set the channel busy timer time-out parameter to the
specified value. Changing the Mode 2 channel busy timer time-out outside the range 6 to 120 (inclusive), the
radio rejects the command by displaying an error indication on the maintenance port terminal, and no change will
be made to the channel busy timer time-out parameter.
3.2.4.33 CBT – Display or Modify the ACARS Channel Busy Time-out Parameter Value
Display the ACARS channel busy time-out parameter in seconds using the cbt command.
Entering the command cbt followed by a space and a numerical value for the desired ACARS channel busy
time-out value in seconds, causes the radio to set the ACARS channel busy time-out parameter to the specified
value. Changing the ACARS channel busy time-out outside the range 6 to 120 (inclusive), the radio rejects the
command by displaying an error indication on the PC/Terminal, and no change will be made to the channel busy
time-out parameter.
3.2.4.34 UPF – Display or Modify Uplink Filtering Enable/Disable State
Display the current uplink filtering state as either “ON” or “OFF” using the upf command.
Entering the command upf followed by a space and either the word “ON” or “OFF” causes the radio to enable or
disable uplink filtering, respectively.
3.2.4.35 DNF – Display or Modify Downlink Filtering Enable/Disable State
Display the current downlink filtering state as either “ON” or “OFF“ using the dnf command.
Entering the command dnf followed by a space and either the word “ON” or “OFF” causes the radio to enable or
disable downlink filtering, respectively.
3-9
MX-9325
PROGRAMMING/SETUP
3.2.4.36 RSF – Display or Modify RSSI Filtering Enable/Disable State
Display the current RSSI filtering state as either “ON” or “OFF” using the rsf command.
Entering the command rsf followed by a space and either the word “ON” or “OFF” causes the radio to enable or
disable RSSI filtering, respectively.
3.2.4.37 RFT – Display or Modify RSSI Filtering Threshold Value
Display the RSSI filtering threshold parameter value using the rft command.
Entering the command rft followed by a space and a numerical value for the RSSI filtering threshold value,
causes the radio to set the RSSI filtering threshold parameter to the specified value. Changing the RSSI filtering
threshold parameter outside the range 0 to 100 (inclusive), the radio rejects the command by displaying an error
indication on the PC/Terminal, and no change will be made to the RSSI filtering threshold parameter.
3.2.4.38 ACS - Display ACARS or Mode 2 Statistics
Display the most recently calculated S1 and S2 statistic values when in ACARS using the acs command.
Display the most recently calculated S3 and S4 statistic values when in Mode 2 using the acs command.
3.2.4.39 CBF – Display or Modify Category B Mode Filter Character
Display the current Category B mode filter character using the cbf command.
Entering the command cbf followed by a space followed by a valid Category B mode filter character, causes
the radio to change Category B mode filter character to the specified character.
3.2.4.40 SER – Display the Radio Serial Number
Display the MX-9325 Transceiver serial number using the ser command.
3.2.4.41 LPB – Display or Modify the LAP-B Parameters
Display the Host Port LAP-B parameter values using the lpb command.
Entering the command lpb followed by a space and a numerical value for each of the window size, t1, t2, t4,
and n2 values, causes the radio to set the LAP-B parameters to the specified values.
3.2.4.42 OVN – Display the Number of Overruns
Display the number of overruns using the ovn command.
3.2.4.43 OVZ – Display the Number of Overruns and Reset the Number to Zero
Display the number of overruns and reset the number to zero using the ovz command.
3.2.4.44 PRG – Purge the Messages and Display the Number of Purged Messages
Purge messages and display the number of messages that have been purged using the ovz command.
3.2.4.45 ELP – Display or Modify the Print Software Error Log enabled/disabled Flag
Display the current print software error log state as either “ON” or “OFF” using the elp command.
Entering the command elp followed by a space and either the word “ON” or “OFF” causes the radio to change
the current print software error log state.
3.2.4.46 ERR – Display the Software Error Log
Display the current software error log using the err command.
3-10
MX-9325
PROGRAMMING/SETUP
3.2.4.47 HELP – Display the Commands Available at the Current Access Level
Display the commands that are valid at the current access level using the help command.
3.2.4.48 TVLS – Display the Tx VCO Lock State
Display the Tx VCO lock state using the tvls command.
3.2.4.49 RVLS – Display the Rx VCO Lock State
Display the Rx VCO lock state using the rvls command.
3.2.4.50 BFLS – Display the BFO PLL Lock State
Display the BFO PLL lock state using the bfls command.
3.2.4.51 LOLS – Display the LO PLL Lock State
Display the LO PLL lock state using the lols command.
3-11
MX-9325
PROGRAMMING/SETUP
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3-12
MX-9325
FUNCTIONAL DESCRIPTION
CHAPTER 4
FUNCTIONAL DESCRIPTION
4.1 INTRODUCTION
This chapter covers the functional description of the circuitry in the transceiver. Paragraph 4.2 provides a
simplified functional description and Paragraph 4.4 provides a detailed transceiver functional description.
Paragraph 4.3 provides a detailed extender unit functional description. Refer to Chapter 5 for BIT and
troubleshooting information. For parts list and family tree information, refer to Chapter 7, Paragraph 7.4. Refer to
Appendix A for the glossary of terms.
4.2 SIMPLIFIED TRANSCEIVER FUNCTIONAL DESCRIPTION
See Figure 4-1. The transceiver contains J1 Host Port for computer interface, digital processor and MSK/D8
modem function, receiver function, Transmitter function, power amplifier, and low pass filter/directional coupler.
It operates as a DSB AM MSK data transceiver and a digital data transceiver. As an AM MSK DSB data
transceiver, the radio operates according to the ACARS specifications. The transceiver contains an internal MSK
modem function providing all modulation/demodulation and CSMA for media access control. As a digital data
transceiver, the radio operates in Mode 2 (31.5 kbit per second suppressed carrier Differential 8 Phase Shift Key
modulation, CSMA.
4.3 SIMPLIFIED VHF EXTENDER UNIT FUNCTIONAL DESCRIPTION
See Figure 4-2. The VHF Extender Unit contains a EIA-530 Modem and a discrete I/O card required for remote
and split site system configurations. A RS-232 Modem is used with an optional Antenna Relay Switch installed.
The Discrete I/O card extends the receiver’s channel busy and the transceiver’s receiver mute differential signal
output lines for transceiver operation in split site ACARS and Mode 2. Signal interfaces are extended to the
remote site by means of a current loop interface circuit, capable of driving the required maximum length of hard
wire lines between sites.
The EIA-530 modem interface is used in the VHF Extender Unit to support the extension of computer to the
remote transceiver rear panel host port, or the from a local transceiver to a remote transceiver in split site
configuration. The Modem accommodates a variety of digital data interfaces: V.24/RS-232, V/35, X.21, EIA-530,
V.36 (RS-449), G.703 and Ethernet.
The EIA-530 modem features V.54 diagnostic capabilities to perform local analog loopback and local and remote
digital loopback. The loops can be manually activated from the front panel or via control signals from the
interface connector. In addition, the EIA-530 modem incorporates a built-in BERT to enable complete testing of
both modems and the intersite line. A front panel switch generates a pseudo-random test pattern (511 bits)
according to ITU V.52, for testing end-to-end connectivity. An ERROR LED located on the front or the modem,
flashes when a bit error is detected.
The modem’s range at a particular data rate is dependent on the transmission line wire gauge. At a data rate of 192
kbps, 22 AWG wire is sufficient for intersite lines up to 4.5 km in length. Intersite lines of 19 AWG wire are
required to support transmission at 192 kbps on lines greater than 4.5 km long. Table 4-1 lists the approximate
range of the EIA-530 modem over various gauges of unconditioned transmission line.
The RS-232 modem provides an RS-232D (EIA-232/V.24) digital data interface to the Computer. The RS–232
modem is selected for use in the Extender Units to support the extension of the Antenna Switch Serial Control
Port from the local computer to remote site Antenna Switches in Remote Site and Split Site configurations.
4-1
MX-9325
FUNCTIONAL DESCRIPTION
The modem’s range at a particular data rate is dependent on the transmission line wire gauge. At a maximum data
rate of 19.2 kbps, 26 AWG wire is sufficient for intersite lines up to 7.5 km in length. The RS–232 modem
features V.54 diagnostic capabilities to perform local analog loopback and local and remote digital loopback. The
loops can be manually activated from the front panel or via control signals from the interface connector. Table 4-2
lists the approximate range or the RS-232 Modem over various gauges of unconditional transmission lines.
Ground
computer
Interface
Digital
Processor
MS K
Function
Receiver
Function
Filter
Directional
coupler
Power
Amp
Transmitter
Function
9325-005
Figure 4-1. Transceiver Simplified Block Diagram
5Km
Discrete
I/O
Ground
computer
Interface
Rear Panel
Interface
5Km
EIA-530
Modem
5Km
RS-232
Modem
(For ARS)
9325-006
Figure 4-2. Extender Unit Simplified Block Diagram
4-2
MX-9325
FUNCTIONAL DESCRIPTION
Table 4-1. EIA-530 Modem Approximate Maximum Range
DATA
RATE
19 AWG
km
192 kbps
144 kbps
128 kbps
6.0
10.6
12.4
22 AWG
miles
3.7
6.6
7.7
km
24 AWG
miles
4.5
6.75
7.3
2.8
4.2
4.5
km
3.5
4.5
5.0
26 AWG
miles
2.2
2.8
3.1
km
2.7
3.4
3.6
miles
1.7
2.1
2.2
Table 4-2. RS-232 Modem Approximate Maximum Range
DATA
RATE
19 AWG
km
19.2 kbps
14.4 kbps
9.6 kbps
22.5
24.5
29
24 AWG
miles
14
15.2
18
km
10
11
13
26 AWG
miles
6.2
6.8
km
7.5
8.2
9.5
miles
4.6
5.1
5.9
4.4 DETAILED TRANSCEIVER FUNCTIONAL DESCRIPTION
The following paragraphs provides detailed functional description of the transceiver. Paragraph 4.4.1 describes
the transceiver signal paths. Figures 4-3 through 4-7 shows the transceiver signal path block diagrams.
4.4.1
Transceiver Signal Paths
•
Transmit/Receive Data Signal Paths – Paragraph 4.4.2
•
Transmit RF Signal Paths - Paragraph 4.4.3
•
Receive RF Signal Paths - Paragraph 4.4.4
•
Control/Interface Signal Paths – Paragraph 4.4.5
•
BIT Signal Path – Paragraph 4.4.6
•
Power Distribution – Paragraph 4.4.7
4.4.2
Data/RF/IF Signal Paths
The following paragraphs describe the functions of each assembly as they relate to the transmit and receive signal
path through the transceiver.
See Figure 4-3. Data messages enter A1A2 Digital Board PWB Assembly via the rear panel host port, extender
port as LAPB Frames.
4.4.2.1
A1A2 Digital PWB Assembly
Data to be transmitted enters A1A2 Digital PWB Assembly Host or extender interface port. The interface port
performs level shifting and routes serial data to a Power PC860 microprocessor. The microprocessor performs all
required integrity checks then sends data to a DSP which processes the digital data signals. The digital data is then
sent to the DAC to be converted to baseband analog. The DAC routes a parallel analog In-phase and Quadrature
4-3
MX-9325
FUNCTIONAL DESCRIPTION
(I and Q) audio signal to the exciter interface on A1A2 Digital PWB Assembly where it is sent to A1A3 Exciter
PWB Assembly.
In receive mode, the received signal is sent to A1A2 Digital PWB Assembly where the analog baseband signal is
converted to digital. The A1A2 Digital PWB Assembly mounted DSP measures the RSSI and implements AGC
by controlling the receiver’s IF and RF gain. In split site configuration, the DSP monitors the RSSI as reported by
local receiver, via the VHF extender unit, interfaces to generate a channel busy signal. The channel busy signal
applies the algorithm to the DSP to determine the correct transmission time. The DSP accepts baseband I and Q
audio from the receiver’s demodulator section and digitally demodulates those signals to generate recovered data.
Upon successful receipt of a data burst, the DSP executes any FEC algorithms, if available, and provides the data
to the microprocessor. The microprocessor formats the data for delivery to the VGC via A1A2 Digital PWB host
or extender interface port.
4.4.3
Transmit RF Signal Path
See Figure 4-4. The following paragraphs describe the Transmit RF Signal path of the MX-9325 Transceiver.
4.4.3.1
A1A3 Exciter PWB Assembly
The A1A3 Exciter PWB Assembly produces a frequency synthesized RF output modulated signal. The I and Q
audio signals are amplified and sent to a Vector Modulator Circuit. The modulated RF is sent through a second
amplifier then attenuated before leaving A1A3 Exciter PWB Assembly and routed to A1A4A1 Power Amplifier
PWB.
4.4.3.2
A1A4A1 Power Amplifier Assembly
The A1A4A1 Power Amplifier Assembly consists of two amplifier stages which amplify the modulated RF
signals from A1A3 Exciter PWB Assembly to a level of 25 watts, nominal. The amplified RF signal is sent to
A1A5 Low Pass Filter and Directional Coupler PWB Assembly.
4.4.3.3
A1A6 Directional Coupler Assembly
The A1A5 Low Pass Filter and Directional Coupler Assembly contains a low pass filter and antenna switch. The
low pass filter provides the required amount of attenuation at harmonics of the transmitter frequency.
The directional coupler is located between the low pass filter and antenna switch, and monitors both forward and
reflected power on the antenna feedline. The antenna switch switches the antenna between the power amplifier
output and receiver RF input. It consists of a solid-state PIN diode switch using quarter-wave transmission lines to
provide isolation between the transmitter output and the receiver input.
4.4.4
Receiver RF Signal Path
See Figure 4-5. The following paragraphs describe the Receive RF Signal Path.
4.4.4.1
A1A5 Low Pass Filter and Directional Coupler Assembly
The transceiver receives RF messages via the J5 antenna port. RF is passed through A1A5 Low Pass Filter and
Directional Coupler Assembly and A1A8 Helical Filter Assembly before entering A1A7 Receiver PWB
Assembly.
4.4.4.2
A1A7 Receiver PWB Assembly
The A1A7 Receiver PWB Assembly utilizes frequency synthesized oscillators to down convert and demodulate
on channel signals to be sent to A1A2 Digital PWB Assembly. The received signal strength voltage is also sent to
A1A2 Digital PWB Assembly for processing.
4-4
MX-9325
FUNCTIONAL DESCRIPTION
RF_RSSI
RSSI
A4
CODEC
RF_AGC_CTRL
AM_DEMOD
IF_AGC_CTRL
DEMOD_DC
PART OF
REAR PANEL
A/D
RECEIVER
INTERFACE
AM_DEMOD
2:1 MUX
FROM
RECEIVER
PWB
I IN
Q IN
RX_I
P/O
J12
RX_Q
HOST
INTERFACE
LOCAL
VGC
POWER
PC860
MICROPROCESSOR
VHF
EXTENDER
UNIT
(MODEM)
I OUT
DSP
DAC
EXCITER
INTERFACE
TO
EXCITER
PWB
Q OUT
P/O
J20
EXTENDER
INTERFACE
PART OF
REAR PANEL
VHF
EXTENDER
UNIT
(MODEM)
9325-007
REMOTE/SPLIT
SITE
VGC
Figure 4-3.
Data/Transmit/Recieve
Signal Path Block Diagram
4-5/4-6
A4
MX-9325
FUNCTIONAL DESCRIPTION
EXCITER PWB ASSEMBLY
POWER AMPLIFIER
ASSEMBLY
A1A4A1
P/O
J3
I CHANNEL
FILTER
I IN
I CHANNEL
DRIVER
I CHANNEL
MIXER
DIRECTIONAL COUPLER ASSEMBLY A5
EXCITER
AMPLIFIER
FROM
DIGITAL
PWB
Q IN
PRE
DRIVER
J2
QUAD
COUPLER
Q CHANNEL
FILTER
VARIABLE
ATTENUATOR
RF
COMBINER
J1
OUTPUT
DRIVER
J2
J1
LOW
PASS
FILTER
J5
STRIPLINE
COUPLER
ANTENNA
SWITCH
Q CHANNEL
DRIVER
Q CHANNEL
MIXER
FEEDBACK
AMPLIFIER
TO RECEIVER
CIRCUITS
REFERENCE
OSCILLATOR
CIRCUIT
9325-008
Figure 4-4.
Transmit RF Signal Path
Block Diagram
4-7/4-8
MX-9325
FUNCTIONAL DESCRIPTION
A1A2 RECEIVER PWB ASSEMBLY
NARROW
BAND
FILTER
A4
P/O A4 HEAT SINKS
DIRECTIONAL
COUPLER
ASSEMBLY
J3
J5
HELICAL
FILTER
ASSEMBLY
RF PRE
AMPLIFIER
J1
MIXER
1ST IF
AMPLIFIER
LOW
PASS
FILTER
2ND IF
AMPLIFIER
P/O J3
45 MHz IF
ANTENNA
SWITCH
455 KHz IF
NARROW
BAND
MIXER/IF
ANTENNA
PORT
FROM
TRANSMITTER
CIRCUITS
NARROW
BAND
FILTER
REFERENCE
OSCILLATOR IN
SWITCH
DEMOD_INV
455 KHz
AM
DETECTOR
–
DEMOD_NINV
VCO
LO
AM_DEMOD
OUT
TO A1A2
DIGITAL PWB
ASSEMBLY
RSI
AMPLIFIER
RF_RSI
SWITCH
WIDE
BAND
FILTER
RSSI OUT
WIDE
BAND
FILTER
45 MHz IF
WIDE
BAND
MIXER/IF
455 MHz IF
RSSI
LO
NARROW
BAND
FILTER
WIDE
BAND
FILTER
455 KHz IF
I PRE
AMPLIFIER
45 MHz IF
AMPLIFIER
I OUT
MIXER/
QUADRATURE
DETECTOR
BFO_TV
Q PRE
AMPLIFIER
BFO
BFO_ENABLE
455 KHz
TO A1A2
DIGITAL PWB
ASSEMBLY
AMPLIFIER
Q OUT
9325-009
Figure 4-5.
Recieve RF Signal path
Block Diagram
4-9/4-10
MX-9325
FUNCTIONAL DESCRIPTION
4.4.5
Control / Interface Signal Paths
See Figure 4-6. This figure illustrates the control paths that exist between the front panel maintenance port, front
panel LEDs, rear panel data port, DSP, exciter, receiver, power amplifier, and antenna. The control paths are
where the transceiver interacts with an external control terminal in the form of a PC or ASCII terminal. Since no
operator controls exist on the transceiver front panel, all control functions for the transceiver originate at the PC
or terminal. Control functions include parameter changes and readbacks, BIT and system status.
The following are descriptions of the various types of control that occur within the transceiver. The types of
control include the following:
•
Front Panel Interface – Paragraph 4.4.5.1
•
Internal A1A2 Digital PWB Assembly Functions – Paragraph 4.4.5.2
•
A1A3 Exciter PWB Assembly – Paragraph 4.4.5.3
•
Power Control Interfaces – Paragraph 4.4.5.4
•
Receiver Control Interface– Paragraph 4.4.5.5
4.4.5.1
Front Panel Interface
Front panel interface consists of interfacing the maintenance port to A1A2 Digital PWB Assembly.
The PC or terminal is connected to the transceiver front panel mounted MAINTENANCE connector, an RS-232
port using a standard DB-9 serial connector. Data signals from the PC or terminal enter the transceiver through
this port and go directly to A1A2 Digital PWB Assembly. The control software is actually contained in a
EEPROM on A1A2 Digital PWB Assembly, allowing transceiver control via a dumb terminal. The control
software is accessed by the microcontroller on A1A2 Digital PWB Assembly, decoded, and used to initiate such
actions as frequency and bandwidth changes, self-test, and other parameter changes or readbacks. In addition, an
A1A2 Digital PWB Assembly mounted light-emitting diodes on the front panel indicate AC power, receive
carrier detector, transmit key status and fault.
4.4.5.2
Internal A1A2 Digital PWB Assembly
The A1A2 Digital PWB Assembly controls all functions in the transceiver and provides all interfaces to the rear
panel data port. A Flash EEPROM IC contains all software for the processors. At initialization, the
microprocessor fetches its operating software from the Flash EEPORM IC and copies it to its external DRAM IC
for execution. The microprocessor then initializes the DSP. The DSP operates exclusively from internal memory.
Factory programmed calibration data is fetched during power-on initialization. This data, as well as part number,
revision code, manufacturing date and serial number is stored in serially accessed EEPROM devices located on
each internal electrical subassembly. A single I2C bus interconnects these assemblies and the microprocessor. This
bus is inactive during normal operation of the transceiver.
Upon system reset, A1A2 Digital PWB Assembly configures all programmable parts of the system (synthesizers,
RDACs, etc) as required with data fetched from configuration memory. This memory consists of parameter
blocks in the EEPROM, updated when changes are commanded by the host or extender interface port. These
devices reside on a software controlled serial bus, which is not used after initialization is complete and remains
idle during normal transceiver operation.
During operation, A1A2 Digital PWB Assembly monitors certain diagnostic signals to determine if the
transceiver is still capable of operation within specifications. This process is known as BIT. Synthesizer lock
detect lines, heatsink temperature, antenna port match and regulated power supply voltages are examples of
monitored signals which, when out of tolerance, cause the unit to either reduce transmitter power level or create a
4-11
MX-9325
FUNCTIONAL DESCRIPTION
key inhibit condition. A multiplexed eight bit A/D converter connects to the microprocessor for most of the
analog BIT functions. The host port is notified of any change in BIT results.
The A1A2 Digital PWB Assembly is the source of the frequency reference for the other subassemblies in the
transceiver. A VCTCXO on A1A2 Digital PWB Assembly provides a 14.745 MHz signal which is stable to
within 1 ppm over the temperature range. The RDAC provides a means of accurately setting the oscillator
frequency and for compensating for crystal aging. The microprocessor controls the RDAC at initialization to fine
tune the output frequency. The RDAC value is determined during factory testing, and stored into the Flash
Memory IC parameter blocks.
4.4.5.3
A1A3 Exciter PWB Assembly
To perform the transmit function, A1A2 Digital PWB Assembly accepts data conforming to the interface
specification from the host port and performs all required integrity checks on the data. The A1A2 Digital PWB
Assembly enables circuitry on the exciter and power amplifier assemblies, and monitors the output of the dual
directional coupler in order to measure forward and reflected power. The output power level of the transmitter is
under control of A1A2 Digital PWB Assembly for ALC purposes. At the conclusion of the transmitted burst, it
disables the exciter and power amplifier until transmission is again required. The microprocessor monitors the
‘key confirm’ signal at all times to determine if a failure has enabled unauthorized transmission of RF energy.
4.4.5.4
Power Control Interfaces
The A1A2 Digital PWB Assembly individually controls A1A5 Low Pass Filter and Directional Coupler
Assembly mounted antenna switch, PA bias and driver bias and power control attenuator. These functions along
with the timing relationship between these signals and the exciter control signals for key up and down are
determined by the DSP.
Forward and reflected power samples are input to the DSP for power measurement. The DSP calculates the power
and SWR using calibration data stored on the directional coupler assembly and fetched by the microprocessor at
power up or reset. It controls the power output level, by changing the attenuation at the exciter level.
A digital signal, key confirm, is derived from the forward power sample and is input to the microprocessor. This
input is used to monitor the length of RF transmissions. If a transmission exceeds a fixed value, the
microprocessor unilaterally and permanently disables the transmit capability. Two mechanisms exist for disabling
transmissions: the microprocessor can disable the transmit VCO via a digital switch, and prevent the DSP from
biasing the power amplifier, via the power control interface described above.
The transceiver reports a Stuck Carrier condition on the RF channel when operating in either the ACARS mode or
Mode 2. In ACARS mode, a stuck carrier is declared when a carrier signal is detected for more than a configured
amount of time. Upon detecting the presence of a carrier for more than this configured time, the transceiver sends
an unsolicited response message to the computer via the host port indicating a stuck carrier condition. The
transceiver detects the absence of a stuck carrier signal and sends an unsolicited response message to the
computer indicating that a stuck carrier condition no longer exists.
In Mode 2, a stuck carrier condition is declared when the configured TM2 timer has expired. Upon the expiration
of the TM2 timer, the transceiver shall send an unsolicited response message to the computer indicating timer
TM2 has expired and a stuck carrier condition exists. The transceiver determines the absence of a stuck carrier
when successful access of the channel occurs. The transceiver sends an unsolicited response message to the
computer indicating that a stuck carrier condition no longer exists.
4-12
MX-9325
FUNCTIONAL DESCRIPTION
DC POWER
A4
J28
DIGITAL PWB ASSEMBLY
PS_TEMP
P/O REAR PANEL
HS_TEMP
EXCITER_AMP
ADC
FLASH
EEPROM IC
DRAM IC
TX_OSC_AMP
FRONT PANEL
mAINTENANCE
PORT
SQL_CTL
J12
J1
RF_RSSI
RECEIVER
INTERFACE
RECEIVER
CIRCUITS
CODEC
RSSI
RS–232
MAINTENANCE
PORT
INTERFACE
MAINTENANCE
PC / TERMINAL
FRONT
PANEL
LED
DSP
J12
POWER
PC860
MICROPROCESSOR
RX BIT SIGNALS
TEMP ADJ
VCTXO
REFERENCE
OSCILLATOR
RECEIVER
BOARD
RECEIVER
REFERENCE
DIRECTIONAL
COUPLER
J20
RDAC
EXCITER
BOARD
EXCITER
REFERENCE
J20
LOCK DETECT
RF_RSSI
EXCITER
CIRCUITS
EXCITER
INTERFACE
P/O REAR PANEL
TX BIT SIGNALS
FRONT
PANEL
REFERENCE
PWR_CTRL
CONFIGURATION
EEPROM
J16
PA
RVS_PWR
PA
INTERFACE
J1
LOCAL VGC
HOST PORT
INTERFACE
FWD_PWR
FWR_PWR
J3
VSWR
RVS_PWR
CODEC
J3
EXTENDER
PORT
INTERFACE
J2
EXTENDER
(MODEM)
EXTENDER
(MODEM)
REMOTE/
SPLIT SITE
VGC
9325-010
Figure 4-6.
Control Signal Path
Block Diagram
4-13/4-14
MX-9325
FUNCTIONAL DESCRIPTION
4.4.5.5
Receive Control Interface
The microprocessor programs the DDS and synthesizer loops with the common software controlled clock and
data outputs. Discrete, chip select outputs are provided for each serially programmed device and IF bandwidth
select and BFO enable outputs are provided to the receiver. The microprocessor monitors the three synthesizer
lock detect lines.
The DSP accepts an RSSI voltage supplied to an A/D converter, and uses D/A converters to control the IF gain
and RF attenuator stages for AGC. The bandwidth of the RSSI input is 10.5 kHz. Analog I&Q audio inputs to
matched A/D converters are used for D8PSK demodulation. A DC offset voltage for I&Q audio is provided for
level shifting purposes. For AM demodulation, the recovered AM signal and a DC voltage proportional to the
noise level of the signal is applied to A/D converters. The DSP is responsible for ALC and squelch functions.
4.4.6
MX-9325 Transceiver Built In Test (BIT)
See Figure 4-6. The transceiver executes internal diagnostic testing upon power up and under software command
to detect faults and ensure proper operation. BIT activates either remotely or locally via the front panel
maintenance interface port. The transceiver reports the results of BIT tests to the PC/Terminal upon operator
command either remotely or locally.
The extender unit provides internal diagnostic testing to ensure proper operation. Internal diagnostic testing is
applicable to transceivers and extender units in split site and remote site configurations. As part of BIT for split
site configuration, the local transceiver will control the loopback function of the transceivers and extender units.
The local transceiver reports separate BIT status to the computer via the host port for both the local and remote
transceivers.
BIT measures transmitter forward and reflected power in an online mode, as normal transmit traffic.
The transceiver reports to the computer via host port, a high VSWR condition in the BIT fault word response
whenever there is a change in the status.
BIT tests receiver sensitivity as part of the power up or initialization sequence. The transceiver has the capability
for a commanded receiver sensitivity test. The result of the receiver sensitivity test is reported in the BIT status
response.
Table 4-3 lists the BIT performed when the MX-9325 Transceiver is powered on. Refer to Chapter 3 for
information on performing a BIT command while the MX-9235 Transceiver is in operation. Refer to Chapter 5
for BIT fault code descriptions.
Table 4-3. MX-9325 Transceiver Power On BIT
BIT Test
Failure Criteria
Memory test
Boot sequence
DC voltage test
EEPROM assembly checks
Synthesizers and oscillators out of
lock
Power amplifier bias/RSSI check
Receiver sensitivity
Interprocessor communications test
RAM checks
Read/write RAM test fail (critical fault), EEPROM test fail (Boot Fault).
Software image failed to load correctly.
Voltage out of tolerance.
Configuration information of EEPROM assemblies is invalid.
Oscillators failed to lock.
No power reading of RSSI.
Sensitivity is too low.
Communications with the VGC is lost.
RAM verification checks failed.
4-15
MX-9325
FUNCTIONAL DESCRIPTION
4.4.7
MX-9325 Transceiver Power Distribution
See Figure 4-7. Power distribution consists of converting a 85 Vac to 265 Vac input to the various DC voltages
required by the transceiver assemblies, as discussed in the following paragraphs.
4.4.7.1
AC Line Voltage Path
85 Vac to 265 Vac enters the transceiver through rear panel mounted connector J1. The AC passes through a line
filter and the front panel mounted AC Power Switch (CB1) and goes to A1A4A2 28 Vdc Power Supply. The
A1A4A2 28 Vdc Power Supply takes the AC voltage and sends it to a power factor corrector module where it is
converted to 300 Vdc, then converted again to +28 Vdc. The +28 Vdc is sent to A1A6 Low Voltage Power Supply
where +5 Vdc, +15 Vdc, –15 Vdc and distributed along with +28 Vdc to the transceiver assemblies. A seperate
+28 Vdc is also sent directly to A1A4A1 Power Amplifier Assembly.
4.4.7.2
+28 Vdc Path
The +28 Vdc is routed to the following:
•
A1A4A1 Power Amplifier Assembly via connector A1A4J1.
•
A1A6 Low Voltage Power Supply via connector A1A4J2.
4.4.7.3
+5 Vdc, +15 Vdc, –15 Vdc and +28 Vdc Path
The +5Vdc, +15 Vdc, –15 Vdc and +28 Vdc is routed to the following:
•
A1A2 Digital PWB Assembly via connector A1A6J4.
•
A1A3 Exciter PWB Assembly via connector A1A6J6.
•
A1A4A1 Power Amplifier Assembly via connector A1A6J2.
•
A1A5 Low Pass Filter and Directional Coupler Assembly via connector A1A6J9.
•
A1A7 Receiver PWB Assembly via connector A1A6J6
4.4.8
Software Download
The MX-9325 Transceiver maintains three non-volatile storage areas called Software Banks, to hold downloaded
software data. At any time, two of the banks are considered active and contain valid copies of the MX-9325
Transceiver operating software. This enables the radio to execute the most recent downloaded version of its
software, or to switch to a previously downloaded version via instruction from the VGC. The third bank is
regarded as inactive and is kept available as a receiving area for the next version to be downloaded. When a
MX-9325 Transceiver is shipped from the factory, it contains identical versions of software in all software banks,
although only two banks are regarded as containing active software versions.
The software download feature enables the host computer to update software in the MX-9325 Transceiver through
the host or Extender interface port. The MX-9325 Transceiver remains fully operational during the software
download process. software for all of the various processors inside the MX-9325 Transceiver are sent to the radio
bundled as one large package of binary data. Software downloads are stored by the radio into a volatile buffer
until the MX-9325 Transceiver has received all of the data and the data’s integrity has been verified.
4.4.9
VHF Extender Unit
The following paragraphs describe the data and control signal paths of the VHF Extender Unit circuit cards. For
additional information on the VHF Extender Unit and Modem Cards, refer to Chapter 1 Paragraph 1.5.
4-16
MX-9325
FUNCTIONAL DESCRIPTION
A1A4A2 28 VDC POWER SUPPLY ASSEMBLY
CB1
AC HOT
POWER
FACTOR
CORRECTION
85 – 265
VAC
DC/DC
CONV
+28 V
To A4A1
AC NEUTRAL
A1A6 LOW VOLTAGE POWER SUPPLY ASSEMBLY
DC/DC
CONV
DC/DC
CONV
DC/DC
CONV
+28 V
5V
REG
+15 V
15V
REG
+5 V
9325-011
Figure 4-7. Power Distribution Functional Block Diagram
4-17
MX-9325
FUNCTIONAL DESCRIPTION
4.4.9.1
EIA-530 Modem
A high speed, short-range synchronous data modem card. The EIA-530 MODEM is utilized to extend the Rear
panel mounted Host Port EIA-530 serial data interface between the local site VGC or MX-9325 and remote site
MX-9325.
The following paragraphs describe the data signal path of the EIA-530 Modem.
4.4.9.1.1
CDP Encoder/Decoder
The receive signal from the EIA-530 Modem TXD input is sent to the CDP encoder and modulates the data.
Similarly, the CDP decoder receives data from the RX input and demodulates the data stream. The
encoder/decoder can be configured for 4-wire full duplex or 4-wire half-duplex. Refer to Chapter 8 for
configuration information.
4.4.9.1.2
Timing Clock
A timing and clock circuit provides the transmit clock to the CDP encoder.
4.4.9.1.3
Transmit Level
The transmit output signal level is configured from 0 to -6 dBm.
4.4.9.1.4
Receive Circuit
A receive filter attenuates unwanted out-of-band frequency content. The automatic equalizer selects the proper
equalization level dependent upon the selected data rate. The AGC provides gain to compensate for transmission
line attenuation.
4.4.9.1.5
Asynchronous / Synchronous Converter
The data is transmitted between modems synchronously. If an asynchronous data signal is input to the modem,
this circuit provides the conversion to synchronous data in compliance with ITU V.22.
4.4.9.1.6
V.54 Loopback Diagnostics
The V.54 loops are activated whether manually from modem front panel pushbutton or via pins 18 and 21 on the
DTE data interface. Pins 18 and 21 adhere to the EIA standard, providing a Type II circuit (EIA-423) bi-polar
signal interface to the DTE. The circuits will provide local analog loopback, local digital loopback and remote
digital loopback. Either the front panel pushbutton or the DTE interface controls may be disabled via jumper
settings. Refer to Chapter 8 for configuration information.
4.4.9.1.7
Test Pattern
The test pattern generator (PATT GENER) facilitates local and remote modem testing with the standard 511
pseudo-random bit pattern. When one of the loopback tests is invoked and the PATT pushbutton on the front panel
is activated, the circuit sends and checks the pattern with an internal Bit Error Rate Tester (BERT). If the BERT
finds errors, the front panel ERROR LED will flicker or remain lit continuously.
4.4.9.1.8
Remote Power Failure (RPF)
This circuit detects an alarm tone transmitted from the remote modem if the remote site power fails. This feature
can only be utilized when an EIA-530 Modem is connected to a remote stand-alone version of the modem. It
cannot be utilized in the modem while in the extender units.
4.4.9.1.9
EIA-530 Modem power Distribution
The EIA-530 Modem interfaces the VHF Extender Unit chassis via a 44-pin card edge connector. The card
receives DC power from the chassis rear panel via the edge connector. The corresponding 5-pin terminal block
and 25-pin connector provide the external interfaces to all signals.
4-18
MX-9325
FUNCTIONAL DESCRIPTION
4.4.9.2
Discrete I/O Card
The Discrete I/O Card is a plug-in card that resides in alternate, even numbered slots of the extender unit. This
card is only required for the extension of Channel Busy and mute signals in split site configurations operating
ACARS or Mode 2. It permits a discrete control signal to be sent or received over a dedicated intersite line. There
are two (2) sections to the circuit, one transmit and one receive. The transmit circuit converts an RS-422 level
input signal to a 20 mA loop interface signal for transmission over twisted pair line in a differential configuration.
The receive circuit performs the opposite conversion function, the loop interface circuit is converted to RS-422
level output signals. The loop receive signal from transmission line interface is also differential. The assembly
contains an alarm function that activates under a variety of fault conditions, such as: Line Open, Line Short,
Absence of RX Signal.
The following paragraphs describe the data signal path of the Discrete I/O Card.
4.4.9.2.1
20mA Loop Transmitter Circuit
A front panel TX indicator (yellow LED) provides polarity status of the transmitting data signal. When the
RS-422 (+) input lead is positive with respect to the (–) lead, the LED will light, indicating a 0 or SPACE (ON)
condition. The 20 mA loop (+) lead will also be positive with respect to the (–) lead. The discrete control signal
(CH BUSY or RX MUTE) state change is applied to the Discrete I/O Card per RS-422 signal standard. The
RS-422 signal passes through a RF filter circuit, then is converted to a TTL signal that is formed into a
differential 20 mA loop signal. The 20 mA loop signal excursions will not exceed 24 volts. This permits
operation over long dedicated transmission lines where loop resistance is measured in 100’s of ohms. A current
limiting circuit is provided to protect the 20 mA loop transmitter from inadvertent transmission line shorts (either
conductor to conductor or conductor to shield). Secondary transient protection is included in the 20 mA loop to
reduce external EMI threats.
4.4.9.2.2
20 mA Loop Transmitter Circuit
The Discrete I/O Card provides an RX indicator (green LED) located on the front panel that provides polarity
status of the received data signal. When the 20 mA loop (+) lead is positive with respect to the (–) lead, the LED
will light, indicating a 0 or space (on) condition present. The RS-422 (+) lead will be positive with respect to the
(–) lead. A DIP switch located on the circuit board may be used to reverse the data sense of the receive circuit.
In the event a transmission fault exists (e.g. a shorted or open transmission line) the front panel ALARM LED
(red) will light and the alarm relay shall provide an output for remote fault indication. The alarm condition may
be reset from the front panel of the Discrete I/O Card or from a remote location via a ground closure input.
Secondary transient protection is applied to the incoming differential 20 mA loop signal to reduce external EMI
threats. The incoming 20 mA signal is translated into separate TTL signals for each current direction, the digital
signals are logically conditioned so that leading and trailing edges of the signals are clean. The signals
representing the differential state are converted into a single TTL signal that may be inverted by way of a DIP
switch if desired. The TTL signal is then converted into an RS-422 standard signal. The RS-422 signal passes
through RF filtering and to the external world.
The alarm circuitry operates on the TTL output before it is converted to RS-422. The alarm detector is simply an
exclusive–OR of the separate TTL signals representing the original differential 20 mA signal. An alarm exists if
the TTL levels are the same. This condition will exist if the transmission line is inadvertently open, closed, or it
the 20 mA loop transmitter fails. A transient fault must exist for at least 10 ms in order to be passed to the alarm
logic. The alarm logic may be reset locally from the front panel of the Discrete I/O Card or from a remote
location. A solid-state relay provides a remote alarm interface. This alarm relay may be configured for either a
normally open or normally closed fault indication.
4-19
MX-9325
FUNCTIONAL DESCRIPTION
4.4.9.2.3
RS-232 Modem (optional)
The RS-232 modem provides an RS-232D (EIA-232/V.24) digital data interface to the VGC. The RS-232 modem
is selected for use in the extender units to support the extension of the optional Antenna Switch Serial Control
Port from the local computer to remote site antenna switches in remote site and split site configurations.
The RS-232 Short Range Modem operates synchronously/asynchronously at speeds up to 19.2 kbps full or
half-duplex over unconditioned lines.
The modem utilizes conditioned differential di-phase modulation (EUROCOM Standard D1) which provides
immunity to background noise and eliminates normal line distortion. This modulation scheme enables efficient
transmission and reception of serial data over unconditioned twisted pair cable.
The following paragraphs describe the data signal path of the RS-232 Modem.
4.4.9.2.4
CDP Encoder/Decoder
The CDP encoder receives data from the TXD (DTE TX Data) input and modulates the data using the conditional
di–phase modulation (CDP) technique. Similarly, the CDP decoder receives data from the (RCV) transmission
line interface and demodulates the receive data stream. The encoder/decoder may be configured for 4-wire full
duplex or 4-wire half-duplex operation. Refer to Chapter 8 for the proper configuration setting.
4.4.9.2.5
Timing Clock
The modulation timing circuit provides the transmit clock to the CDP encoder. There are four clock sources
selectable, dependent upon the mode of operation. The Internal Oscillator (TCX), External Clock (EXT CLK),
or RV CLK clock derived from the receive signal apply to synchronous operation, and should not be selected.
Instead, the ASYNC setting should be used. Refer to Chapter 8 for the proper configuration setting.
4.4.9.2.6
Asynchronous / Synchronous Converter
The data is transmitted over the lines between modems synchronously. When the asynchronous data signal is
input to the modem, this circuit provides the necessary conversion to synchronous data in compliance with ITU
V.22. Frequency deviations between the modem and the DTE up to +/– 1.1% are compensated for by
lengthening/shortening the stop bit every 8 Async characters (12.5%). For frequency deviations from +/–
1.2–2.3%, the stop bits should be lengthened/shortened every four characters (25%). Refer to Chapter 8 for the
proper configuration setting.
4.4.9.2.7
Transmit Level
The transmit output signal (XMT) level may be configured for 0, –3, –6, or –9 dBm. Refer to Chapter 8 for the
proper configuration settings.
4.4.9.2.8
Receive Circuit
The Receive Filter attenuates unwanted out-of-band frequency content. The Automatic Equalizer circuit selects
the proper equalization level dependent upon the selected data rate. The AGC circuit provides gain to compensate
for transmission line attenuation. The AGC operates in one of two modes: continuously ON or controlled by the
DCD line. When the DCD line is active, the AGC is active – when the DCD line is inactive, the AGC will remain
at its last setting level. Refer to Chapter 8 for the proper configuration setting.
NOTE
For full-duplex point-to-point applications, there is no difference
between the Controlled and Continuous AGC modes of
operation.
4-20
MX-9325
FUNCTIONAL DESCRIPTION
4.4.9.2.9
V.54 Loopback Diagnostics
The V.54 loops are activated either manually from the RS-232 Modem front panel or via pins 18 and 21 of the
RS-232 data interface. The circuits will provide Local Analog loopback, Local Digital Loopback and Remote
Digital loopback. Either the front panel pushbuttons or the data interface controls may be disabled via jumper
settings. Refer to Chapter 8 for proper configuration settings.
NOTE
The V.54 delay jumper must be set to OFF to work for
asynchronous operation.
4.4.9.2.10 Remote Power Failure (RPF)
The circuit detects an alarm tone transmitted from the remote modem if the remote site power fails. This feature
can only be utilized when the RS-232 modem is connected to a remote stand–alone version of the modem.
4.4.9.2.11 RS-232 Modem power Distribution
The RS-232 Modem interfaces the extender unit chassis via a 44-pin card edge connector. The card receives DC
power from the chassis rear panel via the edge connector. The corresponding 5-pin terminal block and 25-pin
connector provide the external interfaces to all signals.
4-21
MX-9325
FUNCTIONAL DESCRIPTION
This page intentionally left blank.
4-22
MX-9325
TROUBLESHOOTING
CHAPTER 5
FAULT ISOLATION
5.1 INTRODUCTION
This chapter provides procedures for fault isolation to the assembly level.
5.1.1
Scope of this Chapter
See Figure 5-1. The procedures presented in this chapter assume that the MX-9325 Transceiver is suspected to
have a fault. The maintenance power-on procedure is used to find a fault indication with the unit. If there is a fault
without a BIT code displayed, use the non-BIT fault isolation procedures. If there is a BIT fault code, generated
by running BIT or during normal operation, use the BIT fault isolation procedure. If a TAP is referenced, perform
those procedures. If the problem is not corrected using any of these procedures, use the support data in Chapter 7
based on the functional area of the fault.
PROBLEM
REPORTED
MAINTENANCE
POWER-ON
(PARAGRAPH 5.2.1)
NON-BIT FAULT
(PARAGRAPH 5.2.3)
RUN-TIME FAULT
(PARAGRAPH 5.2.2)
BIT FAULT
(PARAGRAPH 5.2.2)
TROUBLESHOOT USING
TABLES OR TAPs
TROUBLESHOOT USING
THEORY AND SUPPORT
DATA (CHAPTER 7)
REMOVE AND REPLACE
SUSPECTED ASSEMBLY
AND REPEAT THIS PROCESS
Figure 5-1. Fault Isolation Process Used in this Chapter
5-1
MX-9325
TROUBLESHOOTING
5.2 FAULT ISOLATION PROCEDURES
Fault isolation begins with performing the maintenance power-on procedure. The maintenance power-on
procedure references the non-BIT and BIT fault isolation procedures. Refer to Paragraph 5.2.1.
5.2.1
MX-9325 Transceiver Maintenance Power-On Procedure
Table 5-1 is the procedure to power on the MX-9325 Transceiver UUT and execute BIT.
Table 5-1. Maintenance Power-On Procedure
Step
a. Connect a 50-Ohm RF attenuator to
rear panel connector J104.
b. Place PC or terminal POWER switch
in ON position.
c. If using a PC, run the desired terminal
emulation program.
d. Ensure that the terminal emulation
software or terminal is correctly
configured.
e. Place POWER switch on MX-9325
Transceiver front panel in the ON
position.
f.
PC or terminal keyboard, type BIT
command: bit v .
g. PC or terminal keyboard, type test
command: tst .
Observe
Reference
The PC boots or terminal powers
on.
The PC runs the terminal emulation
program.
Refer to PC or terminal operation
instructions.
Refer to software operation
instructions for more information.
Refer to Chapter 3, Paragraph 3.2.1.
Also refer to terminal or emulation
software operation instructions.
The PC or terminal displays the
If the PC or terminal does not
power-up screen. See Figure
display the power-up screen, refer
TBD.
to the non-BIT troubleshooting
procedures in Paragraph 5.2.3.
If a BIT fault is displayed on the PC Refer to the BIT troubleshooting
or terminal as a result of the BIT
procedures in Paragraph 5.2.2.
command, write down the fault
code.
If no errors occur during BIT, con- If a run-time fault is generated,
tinue operating the radio system in refer to the non-BIT troubleshootan attempt to generate a run-time
ing procedures in Paragraph 5.2.3.
fault.
If a BIT fault is generated, refer to
the BIT troubleshooting procedures
in Paragraph 5.2.2.
If no fault is generated, return radio
system to operational readiness.
5.2.2
MX-9325 Transceiver BIT Fault Isolation
The MX-9325 Transceiver BIT is a thorough self-test that is run when the MX-9325 Transceiver is powered on.
Additionally, the MX-9325 Transceiver runs continuous BIT while the MX-9325 Transceiver is in use.
To display BIT fault codes, execute BIT using the bit  command. To Display a text (verbose) description
of the BIT fault codes use the bit v  command. Refer to Table 5-2 for a complete listing of BIT fault
codes.
Table 5-2 lists all the BIT fault codes, fault text, and the suspected cause of the fault. The fault codes listed in
Table 5-2 are in the form of hexadecimal readbacks of a binary value. Each code listed is for an individual fault.
More than one fault may occur which will result in a combination of fault codes. When this happens, the binary
value will be combined to be represented as an equivalent hexadecimal readback.
5-2
MX-9325
TROUBLESHOOTING
Example 1: Fault Code [00000014] indicates the Exciter Failure and Directional Coupler Failure.
Example 2: Fault Code [0000000A] indicates the 28 Volt Power Supply Failure and Power Amplifier Failure.
After replacing or repairing the suspected cause of the fault, execute BIT, to see whether the original fault has
been eliminated. If the actions do not correct the problem, proceed to the troubleshooting index in Paragraph
7.6.2.
Table 5-2. BIT Fault Codes, Descriptions, and Suspected Assemblies
Fault Code
00000001
00000002
00000004
00000008
00000010
00000020
00000040
00000080
00000100
00000400
00000200
00000800
00001000
00002000
00004000
00008000
5.2.3
Fault Text
Suspect SRU (Prioritized)
Low Voltage Power Supply Failure
28 Volt Power Supply Failure
Directional Coupler Failure
Power Amplifier Failure
Exciter Failure
Receiver Failure
Digital Processor Failure
Unused
Power Amplifier Heat Sink Low Temp
Cooling Fan B
Power Amplifier Heat Sink High Temp
Cooling Fan A
Rx Sensitivity Low
Power Supply Heat Sink Low Temp
Power Supply Heat Sink High Temp
System Boot Error
AC Input Voltage,A1A4, A1A6
AC Input Voltage, A1A4,A1A6
A1A5, A1A2, Antenna
A1A4,A1A3
A1A3, A1A4, A1A6, A1A2
A1A7, A1A4, A1A6, A1A2
A1A2, A1A4, A1A6
Unused
A1A4, A1A2
N/A
A1A4, A1A6, A1A2
N/A
Antenna, A1A5, A1A7, A1A2
A1A4, A1A2
A1A4, A1A2
A1A2
Non-BIT Fault Isolation
Table 5-3 is a list of the non-BIT fault symptoms. Next to the symptom observed is a reference to the
recommended action to take. When the recommended action is to remove and replace assemblies, replace the
assemblies one at a time in the order listed, testing the UUT (repeat Paragraph 5.2.1) after replacing each
assembly. Chapter 6, Table 6-1, references the assembly removal and replacement procedures. When the
recommended action is to perform a TAP, proceed to the specified TAP. Refer to Paragraph 5.2.5 for more TAP
information. If the actions do not correct the problem, proceed to the fault isolation support data in Chapter 7.
Table 5-3. Non-BIT Fault Symptoms
Symptom Observed
Probable
Area
Suggested SRU
MX-9325 Transceiver does not power up.
No RF output
Power Supply
Transmit Signal Path
Proceed to TAP-1. Paragraph 5.2.5.
A1A2, A1A3, A1A4, A1A5
Weak RF output
Transmit Signal Path
A1A2, A1A3, A1A4, A1A5
No Receiver Signal
Receive Signal Path
A1A5, A1A8, A1A7, A1A2
Weak Receiver Signal
Receive Signal Path
A1A5, A1A8, A1A7, A1A2
Loss of PC/terminal control
Data Signal Path
A1A2, PC/Terminal
5-3
MX-9325
TROUBLESHOOTING
5.2.4
VHF Extender Unit Diagnostics
The VHF Extender Unit has diagnostics capabilities to perform local analog loopback or local and remote digital
loopback. The loopbacks can be manually activated from a front panel pushbutton switch or remotely via a
control signal to the rear panel interface connector from the VGC.
The VHF Extender Unit must be properly installed into a system and AC power applied to perform diagnostics.
Refer to Chapter 8, Paragraph 8.4.6.
Table 5-4 lists the VHF Extender Unit diagnostic tests and suspected SRU. Refer to Chapter 6, Corrective
Maintenance for removal and replacement procedures. Refer to Chapter 2, Paragraph 2.2 for front panel control
and indicator descriptions.
Table 5-4. VHF Extender Unit Diagnostic Test
Diagnostic Pushbutton Switch
Observe
Suggested SRU
EIA-530 Modem DIG
EIA-530 Modem ANA
TEST LED Blinks Red
TEST LED Blinks Red
EIA-530 Modem, Intersite lines
EIA-530 Modem, Intersite lines
EIA–530 Modem REM
TEST LED Blinks Red
EIA-530 Modem, Intersite lines
EIA-530 Modem PATT
TEST LED Blinks Red
ERR LED Blinks Yellow
EIA-530 Modem, Intersite lines
Discrete I/O Card (no pushbutton present)
ALM Lights Red
Discrete I/O Card, Intersite lines
RS-232 Modem DIG
TEST LED Blinks Red
RS-232 Modem, Intersite lines
RS-232 Modem ANA
TEST LED Blinks Red
RS-232 Modem, Intersite lines
RS-232 Modem REM
TEST LED Blinks Red
RS-232 Modem, Intersite lines
5.2.5
TAPs
TAPs are provided to help the technician isolate faults using procedures other than simple assembly swapping.
Each TAP begins with a simple description of the fault or symptom.
When applicable, begin by performing the listed initial checks. These are checks that can be performed without
the use of tools or test equipment. If the initial checks do not solve the problem, continue by performing the
procedure itself. Assembly and module removal and replacement procedures are located in Chapter 6, Corrective
Maintenance. If the problem still exists after completing the TAP, proceed to the fault isolation support data in
Chapter 7.
5-4
MX-9325
TROUBLESHOOTING
TAP-1: NO POWER
The MX-9325 Transceiver does not power on.
INITIAL CHECKS
Ensure that AC power is supplied to the
MX-9325 Transceiver.
Ensure that the MX-9325 Transceiver front panel AC
power switch is in the on position.
PROCEDURE
Check for the following voltages at the location provided:
A1A6J4 Pin 1 +28 Vdc
A1A6J4 Pin 2 +15 Vdc
A1A6J4 Pin 3 + 5 Vdc
A1A6J4 Pin 5 +–15 Vdc
Are all voltages present?
Are some of these voltages present?
Disconnect power connector A1A4A2J3 to
A1A4A2 Power Supply Assembly. Check
cable for the following voltages:
87 to 230 Vac – Pins 3 and 4
Is voltage present?
Disconnect power connector
A1A4A2J3 to A1A4A2 Power
Supply Assembly. Check cable
for the following voltages:
87 to 230 Vac – Pins
1 and 2
Is voltage present?
Remove and replace
AC
input
cable.
Return
unit
to
operation.
Remove and replace CB1 on
Front Panel Assembly. Return
unit to operation.
Remove and replace A1A4 Assembly.
Return unit to operation.
Remove and replace A1A6 Assembly. Return unit to
operation.
Remove and replace A1A2 Assembly. Return unit to operation.
5-5
MX-9325
TROUBLESHOOTING
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5-6
MX-9325
MAINTENANCE
CHAPTER 6
MAINTENANCE
6.1 INTRODUCTION
This chapter provides the maintenance procedures for the MX-9325 Transceiver. Paragraph 6.2 provides
preventive maintenance procedures. Paragraph 6.3 provides scheduled maintenance procedures. Paragraph 6.5
provides corrective maintenance which includes adjustment and alignment procedures and assembly removal and
replacement procedures. The MX-9325 Transceiver assemblies are listed in Table 6-1 with a reference to the
corresponding removal and replacement procedure paragraph. For parts list and family tree information, refer to
Chapter 7, Paragraph 7.4.
Table 6-1. MX-9325 Transceiver Assembly Removal and Replacement Paragraph References
SRU Name
MX-9325 Transceiver
A1A2 Digital PWB Assembly
A1A3 Exciter PWB Assembly
A1A4 Heatsink Assembly
A1A5 Low Pass Filter & Directional Coupler Assembly
A1A6 Low Voltage Power Supply Assembly
A1A7 Receiver PWB Assembly
A1A8 Helical Filter Assembly
Paragraph
Reference
6.5.1
6.5.2
6.5.3
6.5.4
6.5.5
6.5.6
6.5.7
6.5.8
Table 6-2. VHF Extender Unit Assembly Removal and Replacement Paragraph References
Paragraph
Reference
6.5.9
6.5.10
SRU Name
VHF Extender Unit
VHF Extender Unit Circuit Card
NOTE
If a product has been fielded for several years, there is the
possibility of firmware incompatibility between new replacement
assemblies and an older unit. If unsure of compatibility, contact
Harris RF Communications customer service department (tel:
716-244-5830).
6-1
MX-9325
MAINTENANCE
6.2 PREVENTIVE MAINTENANCE
No periodic (preventive) maintenance or electronic adjustments are required for the MX-9325 Transceiver or
VHF Extender Unit. All that is recommended is periodic cleaning and inspection.
6.2.1
List of Preventive Maintenance Procedures
Table 6-3 lists the preventive maintenance procedures recommended for the MX-9325 Transceiver and VHF
Extender Unit. The table is divided into the following columns:
a.
Column 1 – Paragraph Number, where the procedure begins.
b.
Column 2 – Preventive Maintenance Procedure, describes the test to be performed.
c.
Column 3 – Periodicity, interval in which the procedure should be performed (that is; daily, weekly,
monthly, etc.).
Table 6-3. Preventive Maintenance Procedures
Paragraph
Number
6.2.2
6.2.3
6.2.2
Preventive Maintenance
Procedure
Clean and inspect chassis
exterior.
Clean and inspect chassis
interior.
Periodicity
Semi-annual
During repair
Clean and Inspect Chassis Exterior
Refer to Chapter 7, Paragraph 7.3 for a list of tools and materials. Perform the following procedure to clean and
inspect the MX-9325 Transceiver exterior:
WARNING
Failure to remove electrical connections from the unit can cause
injury or death to personnel.
NOTE
When the MX-9325 Transceiver is supplied as part of a system,
the system documentation takes precedence.
a.
At MX-9325 Transceiver front panel, verify power switch is in the OFF position.
b.
Disconnect AC power at the source.
c.
Inspect MX-9325 Transceiver exterior for:
6-2
1.
Physical damage
2.
Loose hardware including knobs and switches
3.
Accumulated dust and/or other foreign matter
MX-9325
MAINTENANCE
d.
Use a clean lint-free cloth (Item 10) to wipe exterior surfaces.
e.
Connect AC power at the source.
6.2.3
Clean and Inspect Chassis Interior
Refer to Chapter 7, Paragraph 7.3 for a list of tools and materials. Perform the following procedure to clean and
inspect the MX-9325 Transceiver interior before and during repair:
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
a.
Use a flat-tip screwdriver (Item 1) to remove the (9) screws that secure MX-9325 Transceiver top cover
to chassis. Remove the top cover.
b.
Use service-vacuum cleaner (Item 11) to remove any accumulated dust from the chassis interior.
c.
Inspect MX-9325 Transceiver interior for:
d.
1.
Foreign matter
2.
Discolored or scorched components
3.
Loose or damaged circuit cards or connectors
4.
Moisture
5.
Stripped threaded holes
Replace MX-9325 Transceiver top cover. Use a flat-tip screwdriver (Item 1) to replace the nine (9) screws
that secure exciter top cover to chassis.
6.3 SCHEDULED MAINTENANCE
The following provides scheduled maintenance for the MX-9325 Transceiver. Scheduled maintenance should be
performed annually upon completion of a service task. All scheduled maintenance procedures should pass test
before the MX-9325 Transceiver is put back into operation.
6.3.1
Scheduled Maintenance Procedure List
Table 6-4 lists the scheduled maintenance procedures recommended for the MX-9325 Transceiver. The table is
divided into the following columns:
a.
Column 1 – Paragraph Number, where the procedure begins.
b.
Column 2 – Scheduled Maintenance Procedure, describes the test to be performed.
c.
Column 3 – Periodicity, interval in which the procedure must be performed (that is, daily, weekly,
monthly, annually, etc.).
6-3
MX-9325
MAINTENANCE
Table 6-4. Scheduled Maintenance Test Procedures
Paragraph
Number
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5
6.4.6
6.4.7
6.3.2
Scheduled Maintenance
Test Procedure
BIT
LED Test
Rx Sensitivity and Distortion
Tx Power Output and Distortion
Tx 2:1 VSWR Load
Tx Time–out
Tx Spurious Suppression
Periodicity
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Recommended Test Equipment
Refer to Chapter 7, Table 7-2 for a list of recommended test equipment to perform scheduled maintenance
test procedures.
NOTE
Most test functions can be performed by a communications test
set, or service monitor, which performs the combined functions
of RF and audio signal generator, frequency counter, modulation
analyzer, and RF wattmeter. Service monitors are typically
equipped with an input attenuator pad/dummy load that allows
the full output of the MX-9325 Transceiver to be coupled
directly to the instrument. If this feature is not provided, a
separate pad/dummy load will be required. Separate instruments
can also be used, but this is usually not practical for field work.
Suitable service monitors are manufactured by Hewlett Packard,
the IFR Division of Regency, Inc., and Marconi Instruments Ltd.
NOTE
The frequency measuring instrument (counter, etc.) must have a
high stability time base (better than 0.1 ppm) to ensure accuracy.
Do not attempt to set the reference frequency unless the test
equipment conforms.
6.4 SCHEDULED MAINTENANCE PROCEDURES
The following paragraphs contain information about tests to be performed on a MX-9325 Transceiver as part of
scheduled maintenance.
6.4.1
MX-9325 Transceiver BIT Test
The following paragraphs provide instructions for performing the MX-9325 Transceiver BIT test as part of
scheduled maintenance.
6-4
MX-9325
MAINTENANCE
6.4.1.1
Required Equipment
The following equipment is required to perform the power output test:
•
PC or ASCII Terminal
6.4.1.2
Test Procedure
Perform the following procedure to perform the MX-9325 Transceiver BIT test:
a.
Set up the radio system as shown in Figure 6-1.
b.
Use PC/terminal to set MX-9325 Transceiver UUT frequency to 127.000 MHz.
c.
On PC/terminal enter his command to display the history of all BIT faults codes which have occurred
since the last time the historical BIT status word was cleared.
d.
On PC/terminal enter dbt command to obtain detailed BIT results for each assembly in the radio.
e.
If any of the detailed BIT results are non–zero, refer to Chapter 5, Paragraph 5.2.2 for BIT fault isolation.
MX-9325 TRANSCEIVER
UNIT UNDER TEST
FRONT PANEL
MAINTENANCE
CONNECTOR
9325-012
PC/TERMINAL
Figure 6-1. MX-9325 Transceiver BIT Test Set Up
6-5
MX-9325
MAINTENANCE
6.4.2
MX-9325 Transceiver LED Test
The following paragraphs provide instructions for performing the MX-9325 Transceiver LED test as part of
scheduled maintenance.
6.4.2.1
Required Equipment
The following equipment is required to perform the MX-9325 Transceiver LED test:
•
Signal Generator
•
PC or ASCII Terminal
6.4.2.2
Test Procedure
Perform the following procedure to test the MX-9325 Transceiver front panel LEDs:
a.
Set up the radio system as shown in Figure 6-2. Refer to Chapter 3, Paragraph 3.2.4 for command
information.
b.
Verify that the AC POWER LED lit when the power switch was turned on.
c.
Apply a –60 dBm receive signal to the J5 antenna port.
d.
Verify that the RECEIVE LED lit.
e.
On PC/terminal, enter key on command to key the MX-9325 Transceiver.
f.
Verify that the TRANSMIT LED lit.
g.
On PC/terminal, enter key off command to unkey the MX-9325 Transceiver.
h.
Remove the MX-9325 Transceiver bottom cover.
i.
Simulate a critical fault by removing the coaxial cable from J21 on the A1A2 Digital PWB Assembly.
j.
Verify that the FAULT LED lit.
6-6
MX-9325
MAINTENANCE
MX-9325 TRANSCEIVER
UNIT UNDER TEST
J5
ANTENNA
SIGNAL
GENERATOR
FRONT PANEL
MAINTENANCE
CONNECTOR
9325-013
PC/TERMINAL
Figure 6-2. MX-9325 Transceiver LED Test Set Up
6.4.3
Receive Sensitivity and Distortion Test
Performs a series of receive sensitivity tests by reading the SINAD at a single specified drive level.
The following paragraphs provide instructions for performing the Receive Sensitivity and Distortion test as part
of scheduled maintenance.
6.4.3.1
Required Equipment
The following equipment is required to perform the Receiver Sensitivity and Distortion test:
•
RF signal generator
•
30 dB attenuator
6.4.3.2
Test Procedure
Perform the following procedure to test the MX-9325 Transceiver: Receive Sensitivity and Distortion
a.
Set up the radio system as shown in Figure 6-3. Refer to Chapter 3, Paragraph 3.2.4 for command
information.
b.
Configure the audio analyzer to measure SINAD.
c.
Use PC/terminal frq command to set MX-9325 Transceiver to receive AM at a test frequency of 127.500
MHz .
d.
Set the signal generator to the test frequency with AM modulation of a 1 kHz tone at 30% modulation.
e.
Adjust the signal generator to provide –99.0 dBm at the antenna port of the MX-9325 Transceiver
(accounting for path loss through the attenuator, cables, and switches).
f.
Measure the SINAD on the audio analyzer. The measurement should be > or = 10 dB.
6-7
MX-9325
MAINTENANCE
g.
Adjust the signal generator to –60.0 dBm (at the antenna port of the MX-9325 Transceiver) and measure
the distortion on the audio analyzer.
h.
Measure the distortion on the audio analyzer. The measurement should be <5 dB.
i.
Repeat Steps c through h using test frequencies of 118 MHz and 136.975 MHz.
MX-9325 TRANSCEIVER
UNIT UNDER TEST
FRONT PANEL
MAINTENANCE
CONNECTOR
J5
ANTENNA
PORT
30 DB
ATTENUATOR
SIGNAL
GENERATOR
FRONT PANEL
ACCESSORY
PORT
(J9-3)
AUDIO IN HI
AUDIO
ANALYZER
9325-014
PC/TERMINAL
Figure 6-3. MX-9325 Transceiver Receive Sensitivity and Distortion Test Set Up
6.4.4
Transmit Power Output and Distortion
Performs a series of tests of transmit power output level, percent modulation, and distortion at various carrier
frequencies.
The following paragraphs provide instructions for performing the Transmit Power Output test as part of scheduled
maintenance.
6.4.4.1
Required Equipment
The following equipment is required to perform the percent modulation test:
•
30 dB, 50-Ohm Attenuator
•
RF Power Meter
•
Modulation Analyzer
•
PC or ASCII Terminal
6.4.4.2
Test Parameters
The following are the power outputs to be tested:
•
6-8
Power Output at high power mode, 25 Watts ±5%
MX-9325
MAINTENANCE
•
Power Output at medium power mode, 10 Watts ±5%
•
Power Output at low power mode, 2 Watts ±5%
6.4.4.3
Test Procedure
The Transmit Power Output and Distortion Tests are done at high power mode using carrier frequencies at
118.0 MHz, 126.9 MHz, 127.1 MHz and 136.975 MHz.
The Transmit Power Output and Distortion Tests are done at medium and low power mode using a carrier
frequency at 136.975 MHz. only.
Perform the following procedure to test the Transmit Output Power and Distortion of the MX-9325 Transceiver:
a.
Set up the radio system as shown in Figure 6-4. Refer to Chapter 3, Paragraph 3.2.4 for command
information.
b.
Use PC/terminal enter frq command to set the frequency of the MX-9325 Transceiver to 136.975 MHz.
c.
Use PC/terminal enter mod acars command to set MX-9325 Transceiver UUT to transmit AM.
d.
Use PC/terminal enter pwr command to set MX-9325 Transceiver UUT to transmit the specified power.
e.
Use PC/terminal enter mdl 50 command to set MX-9325 Transceiver UUT to transmit the operating
frequency with 50% modulation of the 1 kHz internal test tone.
f.
On PC/terminal, enter key on command to key the MX-9325 Transceiver.
g.
Measure the power level (in dBm) from the power meter, and correct for the directional coupler and cable
loss to calculate the power output directly at the antenna port.
h.
On the modulation analyzer, measure the actual AM percent modulation of the radio’s transmission and
verify measurement is ±5% at 50% AM modulation.
i.
On the audio analyzer, measure the distortion of the demodulated audio output of the modulation analyzer
and verify measurement is < 5%.
j.
If the modulation appears distorted, check power supply voltages.
k.
If distortion is still present, replace A1A4 Heatsink Assembly, then A1A3 Exciter PWB Assembly, and
A1A2 Digital PWB Assembly.
6-9
MX-9325
MAINTENANCE
MX-9325 TRANSCEIVER
UNIT UNDER TEST
J5
30 dB
ATTENUATOR
POWER
METER
FRONT PANEL
MAINTENANCE
CONNECTOR
AUDIO
ANALYZER
PC/TERMINAL
MODULATION
ANALYZER
Figure 6-4. MX-9325 Transceiver Transmit Power Output and Distortion Test Setup
6.4.5
9325-016
MX-9325 Transceiver VSWR Load
Verifies performance of the MX-9325 Transceiver into a load with a 2:1 VSWR and verifies the radio’s internal
directional coupler by reading back the forward and reflected power.
The following paragraphs provide instructions for performing the MX-9325 Transceiver VSWR load test as part
of scheduled maintenance.
6.4.5.1
Required Equipment
The following equipment is required to perform the MX-9325 Transceiver VSWR load test:
•
RF Power Meter
•
Audio Analyzer
•
Modulation Analyzer
•
50 Ohm Load
•
50 Ohm Attenuator
•
BNC T Connector
•
PC or ASCII Terminal
6-10
MX-9325
MAINTENANCE
6.4.5.2
Test Procedure
Perform the following procedure to test the VSWR Load of the Transceiver:
NOTE
The 2:1 load is constructed by connecting a 50 ohm attenuator
and a 50 ohm load together with a BNC T. To present an
effective 25 ohm load at the antenna connector, the total cable
length (including switching) from the antenna port to the T must
be an integer multiple of half the wavelength. For 136.975 MHz,
this length is approximately 1.09 meters.
a.
Set up the test bed radio system as shown in Figure 6-5. Refer to Chapter 3, Paragraph 3.2.4 for command
information.
b.
Refer to Paragraph 6.4.4. Repeat the Transmit Power Output and Distortion test procedure using a carrier
frequency of 136.975 MHz and power output at 25.0 WATTS.
c.
On PC/terminal, read the forward power of the transmission using the fpw  command.
d.
On PC/terminal, read the reverse power of the transmission using the rpw  command.
BNC
CONNECTOR
MX-9325 TRANSCEIVER
UNIT UNDER TEST
J5
FRONT PANEL
MAINTENANCE
CONNECTOR
APPROXIMATE
CABLE LENGTH
1.09 METERS
POWER
METER
30 dB
ATTENUATOR
50 OHM
LOAD
AUDIO
ANALYZER
MODULATION
ANALYZER
PC/TERMINAL
2205-016
Figure 6-5. MX-9325 VSWR Load Test Set Up
6-11
MX-9325
MAINTENANCE
6.4.6
MX-9325 Transceiver Transmit Time-Out test
Verifies the MX-9325 Transceivers continuous key timer. The time-out specified is the number of seconds the
MX-9325 Transceiver may be keyed continuously before it will automatically unkey.
The following paragraphs provide instructions for performing the MX-9325 Transceiver Transmit Time-Out Test
as part of scheduled maintenance.
6.4.6.1
Required Equipment
The following equipment is required to perform the MX-9325 Transceiver Transmit Time-Out Test:
•
RF Power Meter
•
50 Ohm Load
•
PC or ASCII Terminal
6.4.6.2
Test Procedure
Perform the following procedure to execute the MX-9325 Transceiver Transmit Time-Out Test:
a.
Set up the test bed radio system as shown in Figure 6-5. Refer to Chapter 3, Paragraph 3.2.4 for command
information.
b.
On PC/terminal, enter tim 3 command to set the transmitter continuous key time–out interval to 3
seconds.
c.
On PC/terminal, enter pwr 10 command to set the transmit power output level to 10 Watts.
d.
On PC/terminal, enter key on command to key the MX-9325 Transceiver.
e.
After keying for a total of 2 seconds, measure the power output on the power meter and verify the
measurement is 10 Watts ±5%.
f.
After keying for a total of 4 seconds, measure the power output on the power meter and verify the
measurement is 0 Watts ±0.1.
g.
On PC/terminal, enter key off command to unkey the MX-9325 Transceiver.
h.
Return the time-out interval to the desired value using the tim command.
6-12
MX-9325
MAINTENANCE
MX-9325 TRANSCEIVER
UNIT UNDER TEST
J5
POWER
METER
50 OHM
LOAD
FRONT PANEL
MAINTENANCE
CONNECTOR
PC/TERMINAL
2205-033
Figure 6-6. MX-9325 Transceiver Transmit Time–out
6.4.7
MX-9325 Transceiver Transmit Spurious Suppression
Performs a series of spurious suppression tests at various transmit frequencies. For each frequency, the MX-9325
Transceiver UUT will be keyed and the frequency spectrum from 118.0 to 137.0 MHz will be analyzed for spurs
that may indicate improper circuit operation of the PA, exciter, power supply, etc.
The following paragraphs provide instructions for performing the MX-9325 Transceiver Transmit Spurious
Suppression Test as part of scheduled maintenance.
6.4.7.1
Required Equipment
The following equipment is required to perform the MX-9325 Transceiver Transmit Spurious Suppression Test:
•
30 dB Attenuator
•
Spectrum Analyzer
•
PC or ASCII Terminal
6.4.7.2
Test Procedure
The MX-9325 Transceiver Transmit Spurious Suppression Tests are done at a 25 Watt power output using
operating frequencies at 118.0 MHz, 126.9 MHz, 127.1 MHz and 136.975 MHz.
Perform the following procedure to execute the MX-9325 Transceiver Transmit Spurious Suppression Test:
6-13
MX-9325
MAINTENANCE
NOTE
The suppression level, specified as a positive value, represents
the amount of suppression below the carrier amplitude. For
example 60 dB of suppression indicates that the amplitude of the
spur relative to the carrier is –60 dBc.
a.
Set up the test bed radio system as shown in Figure 6-7. Refer to Chapter 3, Paragraph 3.2.4 for command
information.
b.
Use PC/terminal enter frq command to set the frequency of the MX-9325 Transceiver to desired carrier
frequency.
c.
Use PC/terminal enter pwr command to set the output power of the MX-9325 Transceiver to 25 Watts.
d.
Set the spectrum analyzer of the RF communications test set to sweep from 118.0 to 137.0 MHz.
e.
Use PC/terminal enter key on command to key the MX-9325 Transceiver.
f.
Inspect the entire spectrum analyzer waveform for any spurs which have an amplitude greater than the
carrier amplitude minus the suppression of 60-dB. For example a carrier with an amplitude of 100 dB,
count the spurs that occur after 40-dB.
g.
Do not count the fundamental in the spur analysis. For example discard spurs that occur within 2 MHz of
the carrier frequency.
h.
If any spurs are within 2 MHz of each other, assume that this is a single spur with a wide bandwidth and
record the frequency and level in this region at which the maximum peak occurs.
i.
Record the resulting number of spurs detected.
j.
Use PC/terminal enter key off command to unkey the MX-9325 Transceiver.
MX-9325 TRANSCEIVER
UNIT UNDER TEST
J5
30 dB
ATTENUATOR
SPECTRUM
ANALYZER
FRONT PANEL
MAINTENANCE
CONNECTOR
2205-034
PC/TERMINAL
Figure 6-7. MX-9325 Transceiver Transmit Spurious Suppression Test Set up
6-14
MX-9325
MAINTENANCE
6.5 CORRECTIVE MAINTENANCE
The following provides corrective maintenance procedures consisting of adjustments and alignments, and removal
and replacement procedures.
6.5.1
MX-9325 Transceiver Removal and Replacement Procedure
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 6-8 for typical MX-9325 Transceiver rack
mounting. The following paragraphs provide instructions for the removal and replacement of the MX-9325
Transceiver.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.1.1
MX-9325 Transceiver Removal
Perform the following procedure to remove the MX-9325 Transceiver from the equipment rack:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and extender unit.
b.
Use a No. 2 cross-tip screwdriver (item 1) to remove four (4) screws that secure the MX-9325
Transceiver front panel to the equipment rack.
c.
Use the handles to pull the unit forward until the slides are fully extended and in the locked position.
d.
Disconnect the power cable from the MX-9325 Transceiver AC power input connector. Disconnect all
other connections to the MX-9325 Transceiver rear panel.
e.
Press the slide release button, and remove the MX-9325 Transceiver from the rack by pulling it forward
until it clears the slides.
f.
Place the unit on a steady work surface.
g.
Push the extended rack slides back into the rack.
6.5.1.2
MX-9325 Transceiver Replacement
Perform the following procedure to replace the MX-9325 Transceiver into the equipment rack:
a.
Pull the rack portion to the slides from the equipment rack until they are fully extended and locked.
b.
Install the MX-9325 Transceiver to the slides and push into the equipment rack until the slides lock.
c.
Connect the power cable to the MX-9325 Transceiver AC power input connector. Connect all other
required electrical connections to the MX-9325 Transceiver rear panel connectors.
6-15
MX-9325
MAINTENANCE
d.
Press the release tabs on the slides and push the unit into the equipment rack.
e.
Use No. 2 cross-tip screwdriver (item 1) to replace the four (4) screws that secure the MX-9325
Transceiver front panel to the equipment rack.
f.
Apply AC power to equipment rack. Set the equipment rack POWER ON switch to the ON position. Set
the MX-9325 Transceiver POWER ON switch to the ON position.
6-16
MX-9325
MAINTENANCE
DISCONNECT CABLING
BEFORE REMOVING UNIT.
SLIDE LOCKS ON
BOTH SIDES
LIFT UP TO UNLOCK SLIDE MECHANISM
(BOTH SIDES OF UNIT SIMULTANEOUSLY).
UNIT SHOWN IN
FULLY EXTENDED
POSITION.
SCREWS
(8 PLACES)
FRONT PANEL
SCREWS
(4 PLACES)
9325-017
Figure 6-8. MX-9325 Transceiver Rack Mounting Details
6-17
MX-9325
MAINTENANCE
6.5.2
A1A2 Digital PWB Assembly
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. The
following paragraphs provide instructions for the removal and replacement of A1A2 Digital PWB Assembly.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.2.1
A1A2 Digital PWB Assembly Removal
Perform the following procedure to remove A1A2 Digital PWB Assembly from the MX-9325 Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to Paragraph 6.5.1. Remove MX-9325 Transceiver from equipment rack.
c.
Use flat tip screwdriver (item 6) to loosen 10 captive screws that secure the top cover MP1 to the chassis.
Remove the cover.
d.
Disconnect the following connectors:
e.
f.
6-18
•
A1A2J11
•
A1A2J3
•
A1A2J12
•
A1A2J28
•
A1A2J20
•
A1A2J16
Remove the following RF connectors
•
A1A2J22
•
A1A2J21
•
A1A2J18
Use a No. 1 cross-tip screwdriver (Item2) and loosen 14 captive screws that secure the A1A2 Digital
PWB Assembly.
MX-9325
MAINTENANCE
g.
Use a 3/16-inch nutdriver to remove two (2) hex screws from the front panel maintenance connector.
h.
Use a 11/32-inch combination wrench (item 5) to remove nut from front panel reference connector.
i.
Lift A1A2 Digital PWB Assembly and slide to the rear far enough for the maintenance and reference
connectors to clear the front panel cutouts. Then continue to lift the A1A2 Digital PWB Assembly out of
the chassis.
6.5.2.2
A1A2 Digital PWB Assembly Replacement
Perform the following procedure to replace A1A2 Digital PWB Assembly in the MX-9325 Transceiver:
a.
Place A1A2 Digital PWB Assembly into the chassis front first so that the maintenance and reference
connectors line up and position the board into the chassis.
b.
Use a 3/16-inch nutdriver to replace two (2) hex screws on the front panel maintenance connector.
c.
Use a 11/32-inch combination wrench (Item 5) to replace nut on front panel reference connector.
d.
Use a No. 1 cross-tip screwdriver (Item2) and tighten 14 captive screws that secure the A1A2 Digital
PWB Assembly.
e.
Connect the following RF connectors:
f.
•
A1A2J22
•
A1A2J21
•
A1A2J18
Connect the following connectors:
•
A1A2J11
•
A1A2J3
•
A1A2J12
•
A1A2J28
•
A1A2J20
•
A1A2J16
g.
Replace top cover MP1 onto chassis.
h.
Use a flat-tip screwdriver (Item 6) to tighten 10 captive screws that secure the top cover to chassis.
i.
Refer to Paragraph 6.5.1. Install MX-9325 Transceiver into equipment rack.
6-19
MX-9325
MAINTENANCE
6.5.3
A1A3 Exciter PWB Assembly Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. The
following paragraphs provide instructions for the removal and replacement of A1A3 Exciter PWB Assembly.
6.5.3.1
A1A3 Exciter PWB Assembly Removal
Perform the following procedure to remove A1A3 Exciter PWB Assembly from the MX-9325 Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to Paragraph 6.5.1. Remove the MX-9325 Transceiver from the equipment rack.
c.
Use a flat-tip screwdriver (Item 1) to loosen the ten (10) captive screws that secure bottom cover MP2 to
chassis. Remove bottom cover.
d.
Disconnect the following connectors:
e.
•
A1A3J3
•
A1A3J4
Remove the following RF cables:
•
A1A3J1
•
A1A3J2
f.
Use a No. 1 cross-tip screwdriver (Item 2) to loosen eight (8) captive screws that secure A1A3 Exciter
PWB Assembly to the chassis.
g.
Use a No. 2 cross-tip screwdriver (Item 1) to loosen two (2) captive screws that secure A1A3 Exciter
PWB Assembly into the chassis.
h.
Remove A1A3 Exciter PWB Assembly from chassis.
6.5.3.2
A1A3 Exciter PWB Assembly Replacement
Perform the following procedure to replace A1A3 Exciter PWB Assembly in the MX-9325 Transceiver:
a.
Replace A1A3 Exciter PWB Assembly into the chassis.
b.
Use a No. 2 cross-tip screwdriver (Item 1) to tighten two (2) captive screws that secure A1A3 Exciter
PWB Assembly into the chassis.
c.
Use a No. 1 cross–tip screwdriver (Item 2) to tighten eight (8) captive screws that secure A1A3 Exciter
PWB Assembly to the chassis.
d.
Replace the following RF connectors:
6-20
•
A1A3J1
•
A1A3J2
MX-9325
MAINTENANCE
e.
Replace the following connectors:
•
A1A3J1
•
A1A3J2
f.
Place the bottom cover (MP2) onto the chassis.
g.
Use a flat-tip screwdriver (Item 1) to tighten the ten (10) captive screws that secure bottom cover MP2 to
chassis.
h.
Refer to Paragraph 6.5.1. Install the MX-9325 Transceiver into the equipment rack.
6.5.4
A1A4 Heatsink Assembly Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figures 7-2 and 7-4 for hardware and component
locations. The following paragraphs provide instructions for the removal and replacement of A1A4 Heatsink
Assembly.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.4.1
A1A4 Heatsink Assembly Removal
Perform the following procedure to remove A1A4 Heatsink Assembly from the MX-9325 Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to Paragraph 6.5.1. Remove the MX-9325 Transceiver from the equipment rack.
c.
Use a flat-tip screwdriver (Item 6) to loosen the ten (10) captive screws that secure top cover MP1 to
chassis. Remove top cover.
d.
Use a flat-tip screwdriver (Item 6) to loosen the tem (10) captive screws that secure the bottom cover
MP2 to the chassis. Remove the bottom cover.
e.
With MX-9325 Transceiver placed bottom side up disconnect the following connectors:
•
A1A4A1J4
•
A1A4A1J5
•
A1A4A2J2
6-21
MX-9325
MAINTENANCE
f.
g.
h.
•
A1A4A2J3
•
A1A4A2J2
•
A1A4A1J3
Remove the following RF connectors from:
•
A1A5J2
•
A1A4A1J1
With the MX-9325 Transceiver placed top side up remove the following connectors from:
•
A1A2J11
•
A1A2J3
Remove the following RF connector from:
•
A1A4A1J2
i.
Use a No. 2 cross-tip screwdriver (Item 1) to remove four (4) screws, lockwashers and flatwashers.
j.
Use a No. 2 cross-tip screwdriver (Item 1) to remove one (1) ground screw, lockwasher and flatwasher.
k.
Remove A1A4 Heatsink Assembly from chassis.
6.5.4.2
A1A4 Heatsink Assembly Replacement
Perform the following procedure to replace A1A4 Heatsink Assembly in the MX-9325 Transceiver:
a.
Place A1A4 Heatsink Assembly onto chassis.
b.
Use a No. 2 cross-tip screwdriver (Item 1) to replace four (4) screws that secure A1A4 Heatsink
Assembly onto chassis.
c.
Use a No. 2 cross-tip screwdriver (Item 1) to replace one (1) ground screw onto A1A4 Heatsink
Assembly.
d.
With MX-9325 Transceiver placed top side up, connect the following RF connector:
•
e.
f.
6-22
A1A4A1J2
Connect the following connectors:
•
A1A2J11
•
A1A2J3
With the MX-9325 Transceiver placed bottom side up, connect the following RF connectors:
•
A1A5J2
•
A1A4A1J1
MX-9325
MAINTENANCE
g.
Connect the following connectors:
•
A1A4A1J4
•
A1A4A1J5
•
A1A4A2J2
•
A1A4A2J3
•
A1A4A2J2
•
A1A4A1J3
h.
Replace top cover (MP1)
i.
Replace bottom cover (MP2)
j.
Refer to Paragraph 6.5.1. Install the MX-9325 into the equipment rack.
6.5.5
A1A5 Low Pass Filter and Directional Coupler Assembly Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. The
following paragraphs provide instructions for the removal and replacement of A1A5 Low Pass Filter and
Directional Coupler Assembly removal and replacement.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.5.1
A1A5 Low Pass Filter and Directional Coupler Assembly Removal
Perform the following procedure to remove A1A5 Low Pass Filter and Directional Coupler Assembly from the
MX-9325 Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to Paragraph 6.5.1. Remove the MX-9325 Transceiver from the equipment rack.
c.
Refer to Paragraph 6.5.4. Remove A1A4 Heatsink Assembly.
d.
Disconnect the following connectors:
•
A1A5J5
6-23
MX-9325
MAINTENANCE
•
A1A5J6
e.
Disconnect RF connector from A1A5J4.
f.
Use a 5/16-inch combination wrench and remove the following RF connectors:
•
A1A5J3
•
A1A5J1
g.
Use no. 1 cross-tip screwdriver (Item 2) to loosen four (4) captive screws.
h.
Remove A1A5 Low Pass Filter and Directional Coupler Assembly from chassis.
6.5.5.2
A1A5 Low Pass Filter and Directional Coupler Assembly Replacement
Perform the following procedure to replace A1A5 Low Pass Filter and Directional Coupler Assembly in the
MX-9325 Transceiver:
a.
Place the A1A5 Low Pass Filter and Directional Coupler Assembly into the MX-9325 Transceiver
Chassis.
b.
Use a No. 1 cross-tip screwdriver (Item 2) to tighten four (4) captive screws.
c.
Use a 5/16-inch combination wrench and replace the following RF connectors:
•
A1A5J3
•
A1A5J1
d.
Connect RF connector to A1A5J4.
e.
Connect the following connectors:
•
A1A5J5
•
A1A5J6
f.
Refer to Paragraph 6.5.4. Replace A1A4 Heatsink Assembly.
g.
Refer to Paragraph 6.5.1. Replace the MX-9325 Transceiver into the equipment rack.
6.5.6
A1A6 Low Voltage Power Supply Assembly Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. The
following paragraphs provide instructions for the removal and replacement of A1A6 Low Voltage Power Supply
Assembly.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
6-24
MX-9325
MAINTENANCE
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.6.1
A1A6 Low Voltage Power Supply Assembly Removal
Perform the following procedure to remove A1A6 Low Voltage Power Supply Assembly from the MX-9325
Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to Paragraph 6.5.1. Remove the MX-9325 Transceiver from the equipment rack.
c.
Use a flat-tip screwdriver (Item 6) to loosen ten (10) captive screws that secure the top cover MP1.
Remove the top cover.
d.
Refer to Paragraph 6.5.4. Remove A1A4 Heatsink Assembly from the chassis.
e.
Disconnect the following connectors:
•
A1A6J5
•
A1A6J9
•
A1A6J8
•
A1A6J7
•
A1A6J4
•
A1A6J1
f.
Use a No.1 cross-tip screwdriver (Item 2) to loosen two (2) captive screws that secure the A1A6 Low
voltage Power Supply Assembly.
g.
Use a No. 2 cross-tip screwdriver (Item 1) to remove two (2) screws from behind mounting bracket.
h.
Remove A1A6 Low Voltage Power Supply Assembly from chassis.
6.5.6.2
A1A6 Low Voltage Power Supply Assembly Replacement
Perform the following procedure to replace A1A6 Low Voltage Power Supply Assembly in the MX-9325
Transceiver:
a.
Place A1A6 Low Voltage Power Supply Assembly in the MX-9325 Transceiver.
b.
Use a No. 2 cross-tip screwdriver (Item 1) to replace two (2) screws behind mounting bracket.
c.
Use a No.1 cross-tip screwdriver (Item 2) to tighten two (2) captive screws that secure the A1A6 Low
Voltage Power Supply Assembly.
6-25
MX-9325
MAINTENANCE
d.
Connect the following connectors:
•
A1A6J5
•
A1A6J9
•
A1A6J8
•
A1A6J7
•
A1A6J4
•
A1A6J1
e.
Refer to Paragraph 6.5.4. Replace A1A4 Heatsink Assembly.
f.
Use a flat-tip screwdriver (Item 6) to tighten ten (10) captive screws that secure the top cover MP1.
g.
Refer to Paragraph 6.5.1. Replace the MX-9325 Transceiver into the equipment rack.
6.5.7
A1A7 Receiver PWB Assembly Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. The
following paragraphs provide instructions for the removal and replacement of A1A7 Receiver PWB Assembly.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.7.1
A1A7 Receiver PWB Assembly Removal
Perform the following procedure to remove A1A7 Receiver PWB Assembly from the MX-9325 Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to 6.5.1. Remove the MX-9325 Transceiver from the equipment rack.
c.
Use a flat-tip screwdriver (Item 6) to loosen the ten (10) captive screws that secure bottom cover to
chassis. Remove bottom cover.
d.
Disconnect the following connectors:
6-26
•
A1A7J3
•
A1A7J4
MX-9325
MAINTENANCE
e.
Disconnect the following RF connectors:
•
A1A7J1
•
A1A7J5
f.
Use a No. 1 cross-tip screwdriver to loosen eight (8) captive screws that secure the A1A7 Receiver PWB
Assembly.
g.
Remove A1A7 Receiver PWB Assembly from chassis.
6.5.7.2
A1A7 Receiver PWB Assembly Replacement
Perform the following procedure to replace A1A7 Receiver PWB Assembly in the MX-9325 Transceiver:
a.
Place A1A7 Receiver PWB Assembly into chassis.
b.
Use no. 1 cross-tip screwdriver to tighten eight (8) captive screws that secure the A1A7 Receiver PWB
Assembly.
c.
Connect the following RF connectors:
d.
•
A1A7J1
•
A1A7J5
Connect the following connectors.
•
A1A7J3
•
A1A7J4
e.
Use a flat-tip screwdriver (Item 6) to loosen the ten (10) captive screws that secure bottom cover to
chassis. Remove bottom cover.
f.
Refer to Paragraph 6.5.1. Replace the MX-9325 Transceiver into the equipment rack.
6.5.8
A1A8 Helical Filter Assembly Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. The
following paragraphs provide instructions for the removal and replacement of A1A8 Helical Filter Assembly.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6-27
MX-9325
MAINTENANCE
6.5.8.1
A1A8 Helical Filter Assembly Removal
Perform the following procedure to remove A1A8 Helical Filter Assembly from the MX-9325 Transceiver:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and MX-9325 Transceiver.
b.
Refer to Paragraph 6.5.1. Remove the MX-9325 Transceiver from the equipment rack.
c.
Use a flat-tip screwdriver (Item 6) to loosen the ten (10) captive screws that secure bottom cover to
chassis. Remove bottom cover.
d.
Use 5/16-inch combination wrench to remove the two (2) RF connectors from both sides of A1A8 Helical
Filter Assembly.
e.
Use no. 2 cross-tip screwdriver (Item 1) to remove two (2) screws that secure A1A8 Helical Filter
Assembly to chassis.
f.
Remove A1A8 Helical Filter Assembly from chassis.
6.5.8.2
A1A8 Helical Filter Assembly Replacement
Perform the following procedure to replace A1A8 Helical Filter Assembly in the MX-9325 Transceiver:
a.
Place A1A8 Helical Filter Assembly into chassis.
b.
Use a No. 2 cross-tip screwdriver (Item 1) to replace two (2) screws that secure A1A8 Helical Filter
Assembly to chassis.
c.
Use a 5/16-inch combination wrench to replace the two (2) RF connectors on both side of A1A8 Helical
Filter Assembly.
d.
Use a flat-tip screwdriver (Item 6) to tighten the ten (10) captive screws that secure bottom cover to
chassis.
e.
Refer to Paragraph 6.5.1. Replace the MX-9325 Transceiver into the equipment rack.
6.5.9
Extender Unit Removal and Replacement Procedures
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 6-8 for typical extender unit rack mounting. The
following paragraphs provide instructions for the removal and replacement of extender unit.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6-28
MX-9325
MAINTENANCE
6.5.9.1
Extender Unit Removal
Perform the following procedure to remove VHF Extender Unit from the equipment rack:
a.
Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver AC
POWER switch to the OFF position. Disconnect power to rack and extender unit.
b.
Use a No. 2 cross-tip screwdriver (Item 1) to remove four (4) screws that secure the VHF Extender Unit
front panel to the equipment rack.
c.
Use the handles to pull the unit forward until the slides are fully extended and in the locked position.
d.
Disconnect the power cable from the VHF Extender Unit AC power input connector. Disconnect all other
connections to the VHF Extender Unit rear panel.
e.
Press the slide release button, and remove the VHF Extender Unit from the rack by pulling it forward
until it clears the slides.
f.
Place the unit on a steady work surface.
g.
Push the extended rack slides back into the rack.
6.5.9.2
Extender Unit Replacement
Perform the following procedure to replace the VHF Extender Unit into the equipment rack:
a.
Pull the rack portion to the slides from the equipment rack until they are fully extended and locked.
b.
Install the VHF Extender Unit to the slides and push into the equipment rack until the slides lock.
c.
Connect the power cable to the VHF Extender Unit AC power input connector. Connect all other required
electrical connections to the VHF Extender Unit rear panel connectors.
d.
Press the release tabs on the slides and push the unit into the equipment rack.
e.
Use a No. 2 cross-tip screwdriver (Item 1) to replace the four (4) screws that secure the VHF Extender
Unit front panel to the equipment rack.
f.
Apply AC power to equipment rack. Set the equipment rack POWER ON switch to the ON position.
6.5.10 Extender Unit Circuit Card Removal and Replacement
Refer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-3 for hardware and component locations. Only
one procedure is needed for all types of circuit cards. The following paragraphs provide instructions for the
removal and replacement of all VHF Extender Unit circuit cards.
WARNING
Failure to remove electrical connections from the unit could
cause injury or death.
6-29
MX-9325
MAINTENANCE
CAUTION
Failure to take the proper precautions may damage the assembly
due to static discharge.
6.5.10.1 VHF Extender Unit Circuit Card Removal
Perform the following procedure to remove a circuit card from the VHF Extender Unit:
a.
Set the equipment rack POWER ON switch to the OFF position. Disconnect power to rack and extender
unit.
b.
Loosen thumb screw at the top of the circuit card bracket.
c.
Pull card forward to remove from VHF Extender Unit chassis rails.
6.5.10.2 VHF Extender Unit Circuit Card Replacement
Perform the following procedure to replace a circuit card in the VHF Extender Unit:
a.
Align circuit card on VHF Extender Unit chassis rails and push forward until circuit card edge connector
has locked with rear chassis connector.
b.
Tighten thumb screw at top of circuit card bracket.
c.
Refer to Paragraph 6.5.1. Replace VHF Extender Unit into equipment rack.
6-30
MX-9325
SUPPORT DATA
CHAPTER 7
SUPPORT DATA
7.1 INTRODUCTION
This chapter contains reference data for fault isolation and maintenance of the MX-9325 Transceiver. The data
consists of suggested tools and test equipment, parts lists, assembly component references, troubleshooting
indexes, chassis connector data, and interconnect diagrams.
7.2 ADDITIONAL SUPPORT
To ensure our customers have continued success with our products, Harris RF Communications provides logistics
planning, spares, tools, technical documentation, training, product service, and field service. For any of these
services contact 716-244-5830.
7.3 TOOLS, MATERIALS, AND TEST EQUIPMENT
Table 7-1 lists the tools and materials for the procedures in this book. The first column, Item, provides the item
number for the tools referenced in the procedures. Table 7-2 lists the suggested test equipment for the procedures
in this book. Manufacturers and models numbers listed in this table are only suggested and is not Harris’
endorsement of the product. Parameter values in column two are for the measurements made in testing procedures
and can be used to obtain available test equipment. The most important factor is that the test equipment used
needs to be calibrated and accurate.
Table 7-1. Tools and Materials
Item
10
11
Description
No. 2 Cross-Tip Screwdriver
No. 1 Cross-Tip Screwdriver
3/16-Inch Nutdriver
5/16-Inch combination Wrench
11/32-Inch Combination Wrench
Six Inch Flat-Tip Screwdriver
Standard Needle–noses Pliers
Wire Cutters
Miniature Flat-Tip Screwdriver
Lint-Free Cloth
Service-Vacuum Cleaner (ESD Safe)
7-1
MX-9325
SUPPORT DATA
Table 7-2. Test Equipment
Equipment Description
RF Power Meter, with 50 W, 100–250 MHz Element
RF Attenuator, 30 dB, 50 Ohm, 50 Watt minimum
Frequency Counter
DC Voltmeter/Digital Multimeter
Spectrum Analyzer
Audio Analyzer
Signal Generator
PC Terminal (ASCII) or personal computer with
Terminal Emulation Software
Testing Parameters
25 Watts
50 Ohm load; 30 dB attenuation of
transmitter RF output signal.
117.975 to 137.000 MHz
+5 Vdc to +30Vdc
85 Vac to 265 Vac
118.000 MHz to 137.000 MHz
Sensitivity SINAD > 10 dB,
Distortion < 5.0%
AM modulation 1 kHz tone at -99
dBm, 99% modulation at 118 MHz to
137 MHz RF.
Operational Commands using
RS 232 protocol.
7.4 PARTS LISTS
The following provides parts lists of the MX-9325 Transceiver. Parts lists are separate for the assemblies,
mechanical parts, attaching hardware, and ancillary kit. Figure 7-1, the family tree, shows the relationship
between the various assemblies in the MX-9325 Transceiver. Figure 7-2 shows the locations of the assemblies,
mechanical parts, and attaching hardware.
7.4.1
Assemblies
Table 7-3 list the assemblies in the MX-9325 Transceiver. Figure 7-2 shows the locations of the assemblies within
the MX-9325 Transceiver. These items are called out in the fault isolation and maintenance procedures.
Table 7-3. MX-9325 Transceiver Assemblies
Ref. Des.
7-2
Item Name
Part
Number
A1
MX-9325 Transceiver
12007–1000
A1A2
Digital PWB Assembly
12007-2500
A1A3
Exciter PWB Assembly
12007-3000
A1A4
Heatsink Assembly
12007-4000
A1A5
12007-4200
A1A6
Low Pass Filter & Directional Coupler
Assembly
Low Voltage Power Supply Assembly
A1A7
Receiver PWB Assembly
12007-5000
A1A8
Helical Filter Assembly
12007-5600
A2
A2A1
(Optional) Extender Unit
Discrete I/O Card
12007-6000
12007-6100
12007-4600
Figure
Number
Figure 7-2
Sheet 1 or 2
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 2
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 2
Figure 7-2,
Sheet 2
Figure 7-3
Figure 7-3
MX-9325
SUPPORT DATA
Table 7-3. MX-9325 Transceiver Assemblies – Continued
A2A2
A2A3
7.4.2
Part
Number
Item Name
Ref. Des.
EIA- 530 Modem
RS-232 Modem
Figure
Number
12007-6050
12007-6151
Figure 7-3
Figure 7-3
Mechanical Parts
Table 7-4 lists the MX-9325 Transceiver mechanical parts. Figure 7-2 shows the locations of the mechanical
parts. These items are called out in the fault isolation and maintenance procedures, or can be damaged or lost.
Table 7-4. MX-9325 Transceiver Mechanical Parts
Ref. Des.
7.4.3
Item Name
Part Number
MP1
Chassis Top Cover
12007-1104
MP2
Chassis Bottom Cover
12007-1104
Figure Number
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 2
Attaching Hardware
Table 7-4 lists the MX-9325 Transceiver attaching hardware. Figure 7-2 shows the locations of the mechanical
parts. These items are called out in the fault isolation and maintenance procedures, or can be damaged or lost.
Table 7-5. MX-9325 Transceiver Attaching Hardware
Letter Code
Part Number
MS51957-81
Pan Head Screw, Stainless
Steel, 8-32 x 1-1/4
Lockwasher
Flatwasher
MS15795-809
Pan Head Screw, Stainless
Steel, 8-32
Pan Head Screw, Stainless
Steel,Philip, 6-32 x1/2
Screw, Hex, Stainless Steel,
4-40
Flat Head Screw, Stainless
Steel, 8-32 x 5/16
MS51958-66
7.4.4
Item Name
MS35338-139
H21-0001-108
MS-24693-C27
Figure Number
Figure 7-2,
Sheet 1
Figure 7-2
Sheet 1
Figure 7-2
Sheet 1
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 1
Figure 7-2,
Sheet 1
Figure 7-2
Sheet 2
Ancillary Kit
Table 7-4 lists the MX-9325 Transceiver ancillary kit items. These items are generally used during installation.
7-3
MX-9325
SUPPORT DATA
Table 7-6. MX-9325 Transceiver Ancillary Kit Items
Quantity.
7-4
Item Name
Part Number
MX-9325 Transceiver
10515-0152-4300
Intermediate Maintenance Manual
MX-9325 Transceiver
10515-0152-4400
Level IV Data Package
AC Power Cord
W80-0029-001
MX-9325
SUPPORT DATA
MX-9325
MULTIMODE TRANSCEIVER
CHASSIS
ANCILLARY KIT
12007–1000
12007–0005–01
A2
DIGITAL PWB
ASSEMBLY
A3
EXCITER PWB
ASSEMBLY
A4
HEATSINK
ASSEMBLY
A5
LOW PASS FILTER
DIRECTIONAL COUPLER
ASSEMBLY
12007-2500
12007-3000
12007–4000
12007–4200
SOFTWARE
TBD
A4A1
POWER AMPLIFIER
ASSEMBLY
A4A2
28 VDC POWER
SUPPLY
ASSEMBLY
12007-4100
02-6014A01
A6
LOW VOLTAGE
POWER SUPPLY
ASSEMBLY
12007–4600
A7
RECEIVER PWB
ASSEMBLY
A8
HELICAL FILTER
ASSEMBLY
12007–5000
12007–5600
OPTIONAL
EXTENDER UNIT
A4A3
REAR PANEL
CONNECTOR HUSING
ASSEMBLY
12007–6000
04–5133A03
EIA–530
MODEM
DISCRETE I/O
ASSEMBLY
RS-232
MODEM
12007–6050
12007–6100
12007–6150
9325-018
Figure 7-1.
Tranceiver Family Tree
7-5/7-6
MX-9325
SUPPORT DATA
A4
(MP1)
TOP
COVER
J18
J21
J22
CAPTIVE SCREWS
(10 PLACES)
FRONT PANEL
REFERENCE
CONNECTOR
(2 PLACES)
A1A2J16
A1A2J20
FRONT PANEL
MAINTENANCE
PORT
(2 PLACES)
A1A2J11
A1A2
ASSEMBLY
A1A2J12
A1A2J28
A1A2J30
A1A4
ASSEMBLY
A1A6
ASSEMBLY
A1A4A1
(4 PLACES)
A1A5J5
A1A5
ASSEMBLY
A1A5J6
J1
A1A5J3
A1A5J1
J5
J9
CAPTIVE
SCREWS
(4 PLACES)
A1A4A2
J8
J7
J4
9325–019
CAPTIVE
SCREWS
(2 PLACES)
Figure 7-2.
MX-9325 Transceiver
Illustrated Parts List
(Sheet 1 of 2)
A1A4A3
7-7/7-8
MX-9325
SUPPORT DATA
(MP2)
BOTTOM
COVER
A1A3
ASSEMBLY
A1A3J1
CAPTIVE
SCREWS
(8 PLACES)
CAPTIVE SCREWS
(10 PLACES)
A4
CAPTIVE SCREW
(2 PLACES)
A1A3J2
A1A8
ASSEMBLY
RF CONNECTOR
(BOTH SIDES)
A1A3J3
A1A7J6
A1A3J4
CAPTIVE
SCREWS
(8 PLACES)
A1A7J5
A1A7J4
A1A7J3
A1A7
ASSEMBLY
(2 PLACES)
9325–020
Figure 7-2.
MX-9325 Transceiver
Illustrated Parts List
(Sheet 2 of 2)
7-9/7-10
MX-9325
SUPPORT DATA
EIA–530
MODEM CARD
DISCRETE I/O
CARD
RS–232
MODEM CARD
9325-021
Figure 7-3.
VHF Extender Unit
Illustrated Parts List
7-11/7-12
MX-9325
SUPPORT DATA
7.5 ASSEMBLY COMPONENT LOCATION REFERENCES
The following provides component locations that are referenced during fault isolation and maintenance. If the
connectors and pins are labeled on an assembly, and there are no other components referenced, then there is no
figure for that assembly. Figure 7-4 provides reference to assembly locations of A4 HeatSink Assembly.
7.6 FAULT ISOLATION INDEXES
The following provides indexes that are helpful during fault isolation. These indexes consist of a protective device
index and fault isolation index. the indexes are described in their respective paragraphs.
7.6.1
Protective Device Index
A protective device index provides information on protective devices such as circuit breakers and fuses. Table 7-7
provides the protective device index for the MX-9325 Transceiver.
Table 7-7. Protective Device Index
Rating
Reference
Designation
CB1
7.6.2
Panel Marking
or ID
Volts
Amps
230
8 Amps
AC Power
Circuit
Protected
Diag.
Ref.
AC Input
2-1, 7-2
Fault Isolation Index
Table 7-8 is the fault isolation index for the MX-9325 Transceiver. It is nearly impossible to identify and publish
procedures for every fault that may, or may not, occur with a particular product. To help isolate faults that are not
listed in Chapter 5, Paragraphs 5.2.2 and 5.2.3. The functional areas are listed in the left column of the index in
Table 7-8. The second column references the functional block diagrams for each functional area. A reference for
the text description for each functional area is provided in column three. Before using the index, consider the
following:
a.
Is the problem in the Data signal paths? Examples may be boot errors, software errors etc.
b.
Is the problem in the Transmit Signal Paths? Examples may be low power output, poor over-the-air data
transfers etc.
c.
Is the problem in the Receive Signal Paths? Examples may be, poor received data quality etc.
d.
Is the problem in the control signal paths? Examples may be loss of PA control, loss of remote control,
loss of front panel control, poor over-the-air data transfers etc.
e.
Is the problem in the power distribution between the various assemblies? Examples could be any of those
listed for Data, Transmit, Receive or control.
Table 7-8. Fault Isolation Index
Signal Path
Diagram
Functional
Description
Paragraph
Data Signal Paths
Transmit Signal Paths
4-3
4-4
4.4.2
4.4.2.1
Receive Signal Paths
Control Signal Paths
Power Distribution Paths
4-5
4-6
4-7
4.4.2.1
4.4.5
4.4.7
Functional Area
7-13
MX-9325
SUPPORT DATA
A4A3
A4
A4A2
A4A1
9325-022
Figure 7-4. A4 Heatsink Assembly Component Location References
7-14
MX-9325
SUPPORT DATA
7.7 CHASSIS CONNECTOR DATA
The following provides chassis connector data that is helpful during installation.
7.7.1
Connectors and Mating Connectors Part Numbers
Table 7-9 provides the chassis connector part numbers and their mating connector part numbers.
Table 7-9. Connectors and Mating Connectors Part Numbers
Mating Connector
Part Number
Part Number
Connector
TO BE DETERMINED
7.7.2
MX-9325 Transceiver Chassis Connector Pinout Data
Tables 7-10 through 7-12 provide pinout data for the connectors mounted on the MX-9325 Transceiver chassis.
Figure 8-2 provides the pin and connector locations.
Table 7-10. J1 Host Interface Port
Pin
Name
SHIELD
DCE_TX_DATA_A
DCE_RX_DATA_A
DCE_RTS_A
DCE_CTS_A
DCE_DSR_A
SIGNAL COMMON
DCE_DCD_A
DCE_RX_CLK_B
10
DCE_DCD_B
11
N/A
12
DCE_TX_CLK_B
13
DCE_CTS_B
14
DCE_TX_DATA_B
15
DCE_TX_CLK_A
16
DCE_RX_DATA_B
17
DCE_RX_CLK_A
18
N/A
19
DCE_RTS B
20
N/A
21
N/A
22
DCE_DSR B
23
N/A
7-15
MX-9325
SUPPORT DATA
Table 7-10. J1 Host Interface Port - Continued
Pin
Name
24
N/A
25
N/A
Table 7-11. J2 Extender Port
Pin
Name
SHIELD
DTE_TX_A
DTE_RX_A
DTE_RTS_A
DTE_CTS_A
DTE_DSR_A
SIGNAL COMMON
DTE_DCD_B
DTE_RX_CLK_B
10
DTE_DCD_B
11
N/A
12
DTE_TX_CLK_B
13
DTE_CTS_B
14
DTE_TX_DATA_B
15
DTE_TX_CLK_A
16
DTE_RX_DATA_B
17
DTE_RX_CLK_A
18
DTE_LOCAL_LOOPBACK
19
DTE_RTS_B
20
DTE_DTR_A
21
DTE_REMOTE_LOOPBACK
22
DTE_DSR_B
23
DTE_DTR_B
24
N/A
25
N/A
Table 7-12. J3 Discrete I/O
Pin
7-16
Name
SHIELD/EARTH GROUND
TIME_REF_IN_A
MX-9325
SUPPORT DATA
Table 7-12. J3 Discrete I/O - Continued
Pin
7.7.3
Name
TIME_REF_IN_B
TIME_REF_OUT_A
TIME_REF_OUT_B
CHAN_BUSY_IN_A
CHAN_BUSY_IN_B
CHAN_BUSY_OUT_A
CHAN_BUSY_OUT_B
10
RX_MUTE_IN_A
11
RX_MUTE_IN_B
12
RX_MUTE_OUT_A
13
RX_MUTE_OUT_B
14
KEY INHIBIT
15
SIGNAL COMMON
VHF Extender Unit Chassis Connector Pinout Data
Tables 7-13 through 7-15 provide pinout data for the connectors mounted on the MX-9325 Transceiver chassis.
Figure 8-3 provides the pin and connector locations.
Table 7-13. EIA-Modem Connections
EIA-530
Signal Description
Circuit Board
Data Port
(Circuit Mnemonic)
Edge Connector
(Card Cage
DB-25 Female)
Chassis Ground (Shield)
17, 18, 39, 40
Local Analog Loopback (LL)
10
18
TX Data A (BA)
14
TX Data B (BA)
37
14
RX Data A (BB)
35
RX Data B (BB)
36
16
RTS A (CA)
34
RTS B (CA)
12
19
CTS A (CB)
33
CTS B (CB)
24
13
DSR A (CC)
32
DSR B (CC)
22
Signal Ground (AB)
9, 31
Remote Loopback (RL)
29
21
Carrier Detect A (CF)
Wire Line (Card
Cage
Terminal Block)
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7-17
MX-9325
SUPPORT DATA
Table 7-13. EIA-Modem Connections - Continued
EIA-530
Circuit Board
Data Port
Signal Description
Edge Connector
(Card Cage
(Circuit Mnemonic)
DB-25 Female)
Carrier Detect B (CF)
15
10
Serial Clock RX A (DD)
11
17
Serial Clock RX B (DD)
16
Serial Clock TX–External/DTE A (DA)
24
Serial Clock TX–External/DTE B (DA)
38
11
Serial Clock TX–Internal/DCE A (DB)
13
15
Serial Clock TX–Internal/DCE B (DB)
12
DTR A (CD)
30
20
DTR B (CD)
27
23
Test Mode Indicator (TM)
25
RX Line (–)
20
–
RX Line (+)
42
–
TX Line (–)
22
–
TX Line (+)
44
–
Wire Line (Card
Cage
Terminal Block)
–
–
–
–
–
–
–
–
–
–
The pinout convention for the EIA-530 modem card edge connector is as follows:
•
•
•
Facing the component side of the PWB with the card edge connector to the right, pin 1 is located at the
bottom and pin 22 is at the top.
Facing the wire side of the PWB with the card edge connector to the left, pin 23 is at the bottom and pin
44 is at the top.
Note that the keying slot is also counted as a “pin”.
Table 7-14. Discrete I/O Card Connections
REF CARD CAGE PINOUTS
Signal Description
RS-422 (–) TX
RS-422 (+) TX
RS-422 (–) RX
RS-422 (+) RX
7-18
Card Edge
Connector
(Discrete I/O
Card)
P2–10
P1–5
P2–12
P1–16
Card Edge
Connector
(Motherboard)
32
34
16
Discrete I/O Interface To
MX-9325
Transceiver
(Card Cage
DB-25 Female)
22
17
Wireline
(or Loop)
Interface
(Card Cage
Terminal
Block)
MX-9325
SUPPORT DATA
Table 7-14. Discrete I/O Card Connections - Continued
REF CARD CAGE PINOUTS
Signal Description
+17 VDC
– 17 VDC
GND (SIGNAL)
GND (FRAME)
LOOP (–) TX
LOOP (+) TX
LOOP (–) RX
LOOP (+) RX
ALARM (+)
ALARM (–)
ALARM RESET
RESERVED
RESERVED
Card Edge
Connector
(Discrete I/O
Card)
P1–1, P2–1
P1–3, P2–3
P1–9, P2–9
P1–17, P1–18,
P2–17, P2–18
P1–22
P2–22
P2–20
P2–20
P1–7
P1–6
P1–2
P1–11
P1–2
Card Edge
Connector
(Motherboard)
1, 23
3, 25
9, 31
17, 18, 39, 40
22
44
20
42
33
24
Discrete I/O Interface To
MX-9325
Transceiver
(Card Cage
DB-25 Female)
Wireline
(or Loop)
Interface
(Card Cage
Terminal
Block)
24
25
12
13
The pinout convention for the Discrete I/O PWB card edge connector is as follows:
•
•
•
Facing the component side of the PWB with the card edge connector to the right, pin P1-1 is located at
the bottom and pin P1-22 is at the top.
Facing the wire side of the PWB with the card edge connector to the left, pin P2-1 is at the bottom and
pin P2-22 is at the top.
Note that the keying slots are also counted as “pins”.
The pin convention for the Motherboard connector is the same as that of the EIA-530 modem.
7-19
MX-9325
SUPPORT DATA
Table 7-15. RS-232 Modem Connections
REF CARD CAGE PINOUTS
CIRCUIT BOARD
EDGE CONNECTOR
(PWB AND
MOTHERBOARD)
Chassis Ground
17, 18, 39, 40
Local Loopback (V.54, Loop 3)
10
TX Data
14
37
RX Data
35
36
RTS
34
12
CTS
33
24
DSR
32
Signal Ground
9, 31
Remote Loopback (V.54 Loop 2)
29
Carrier Detect
–8 VDC Output
15
RX Clock Output (Sync mode)
11
+8 VDC Output
16
TX Clock Input – External (Sync Mode) 7
38
TX Clock Output – Internal (Sync
13
Mode)
30
27
Test Mode Indicator
RX Line
20
RX Line
42
TX Line
22
TX Line
44
Signal Description
RS–232
DATA PORT
DB-25 (Female)
WIRE LINE
(CARD CAGE
TERMINAL
BLOCK)
18
14
16
19
13
22
21
10
17
24
11
15
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
12
20
23
25
–
–
–
–
–
–
–
–
The pin convention for the RS-232 modem card edge connector is the same as that of the EIA-530 modem.
7-20
MX-9325
SUPPORT DATA
7.7.4
VHF Extender Unit Jumper/Dip Switch Setting
Tables 7-16 through 7-18 provides jumper setting available on the VHF Extender Unit Modem and Discrete I/O
Cards. Figures 7-6 through 7-10 provides the jumper locations.
Table 7-16. EIA-530 Modem Jumper Settings
Jumper
J1
V54 DIS
Function
Possible
Settings
Prevents activation of remote V.54 loops
Enable
Disable
J2
Carrier
Selects the transmit carrier mode. When ON, transmit carrier
is constantly ON. When CNTRL, transmit carrier is ON only
when RTS is HIGH
ON
CNTRL
J3
XMT Clock
Selects the transmit timing signal from either: internal clock,
external clock or receive clock and enables working in Asynchronous mode.
INT
EXT
RCV
ASSY
J4
Selects the delay between RTS and CTS.
RTS-CTS Delay
J5
J6
SW Enable
0 ms
9 ms
70 ms
N/A
Enables activation of DIG, ANA and REM loopbacks via the
front panel push buttons.
ON
OFF
J7
Enables Remote Loopback command from the DTE interface
RLB DTE (RL) (21)
ENABLE
DISABLE
J8
Enables Analog Loopback command from the DTE interface
ALB DTE (LL) (18).
ENABLE
DISABLE
J9
RCV Level
J10
RCV Impedance
Selects the receiver sensitivity level required
LOW
HIGH
Selects receive line impedance.
150W
HIGH
J11
Enables the Remote Power Failure feature. (Does not apply to
REM PWR Fail EU.)
J12
XMT Level
J13
XMT Impedance
Selects the transmit output level to the line.
Selects the transmit line impedance.
J14
The CON setting connects Signal Ground to Chassis Ground.
Chassis Ground The DIS setting disconnects them.
ON
OFF
0 dBm
–6 dBm
150W
LOW
CON
DIS
7-21
MX-9325
SUPPORT DATA
Table 7-17. Discrete I/O Card DIP Switch Settings
Switch
Closed
Open
S1A
Normal
(Data Polarity)
Inverted
S1B (Alarm)
NO – Relay Closes on Alarm
NC – Relay Opens on Alarm
N/a
N/a
S1C
S1D
Default
Settings
Closed
Open
Closed
Closed
Table 7-18. RS-232 Modem Jumper/DIP Switch Settings
Jumper/
Switch
Data Rate
Selects the data rate of the modem.
Possible
Settings
0=19.2 kbps
1=14.4k
2=9.6k
3=7.2k
4=4.8k
5=3.6k
6=2.4k
7=1.2k
XMT Timing
For synchronous operation, determines whether the transmit
timing signal comes from the internal clock, external clock or
receive clock. Select ASY for asynchronous operation.
INT
ASY
EX
RCV
2W/4W
Selects the line output configuration of the modem 2W or 4 W.
2W
4W
CTS Delay
Carrier
XMT Level
7-22
Function
Selects the RTS to CTS delay.
0ms
8ms
64ms
Selects the transmit carrier mode. ON setting is for constant
carrier, the CTRL setting is used to switch the carrier on only
when RTS is high
ON
OFF
Selects the transmit line level output.
0dBm
–3dBm
–6dBm
–9dBm
MX-9325
SUPPORT DATA
Table 7-18. RS-232 Modem Jumper/DIP Switch Settings - Continued
Jumper/
Switch
Function
Possible
Settings
XMT IMPD
Selects the transmit line impedance (ohms).
600
300
150
LOW
RCV IMPD
Selects the receive line impedance (ohms).
600
300
150
HIGH
LL Pin 18
Enables or disables the Analog Loopback (LL) from the DTE
interface pin 18.
EN
DIS
10
RL Pin 21
Enables or disables the Remote Loopback (RL) from the DTE
interface pin 21.
EN
DIS
11
FP Switch
Enables or disables control of the DIG/ANA/REM loopback
via front panel pushbutton switches.
EN
DIS
12
Ground
Selects or deselects connection of signal ground to chassis
ground.
CONNECT
DIS CONN
13
AGC
ON selects AGC always on; CTRL selects AGC on when DCD
is on, when DCD goes off, AGC remains at last level.
ON
CTRL
14
V.54 Delay
ON activates V.54 delay for use in tail-end circuits (prevents
multiple loopback) OFF setting sets no delay (standard configuration).
ON
OFF
15
S1 is not used.
ASYNC Length S2 determines the amount of stop bit shortening for Async
mode.
S3 & S4 determine the character lengths for asynchronous operation.
A length of 10 bits is the required for 8 data bits, no parity, 1
stop bit.
Refer to Table 7-19 for a complete listing of all data length settings.
–
ON= 25%
OFF=12.5%
S3=ON,
S4=OFF
7-23
MX-9325
SUPPORT DATA
Table 7-19. RS-232 Modem Data Length Settings
7-24
Start
Bit
Data
Bit
NONE
OFF
OFF
ODD/EVEN
1 or 1.5
OFF
OFF
ODD/EVEN
OFF
ON
NONE
1 or 1.5
OFF
OFF
NONE
OFF
ON
ODD/EVEN
1 or 1.5
OFF
ON
ODD/EVEN
10
ON
OFF
NONE
1 or 1.5
OFF
ON
NONE
10
ON
OFF
ODD/EVEN
1 or 1.5
10
ON
OFF
ODD/EVEN
11
ON
ON
NONE
1 or 1.5
10
ON
OFF
NONE
11
ON
ON
ODD/EVEN
1 or 1.5
11
ON
ON
Parity
Stop Bits
Total Bits
Length
Switch
S3
Switch
S4
MX-9325
SUPPORT DATA
7.8 SYSTEM CABLING REQUIREMENTS
The following provides system cabling requirements and construction recommendations that is helpful during
installation. Table 7-20 lists the cabling requirements for the various site configurations. The quantities listed are
for each channel, which is equivalent to each transceiver or each TX/RX pair in the case of the Split Site
configurations.
Table 7-20. MX-9325 System Cable Requirements - Quantity per Channel
Cable Letter Identification and Quantity per Channel
System Configuration
Standard System (Local)
Standard System (Local)
With Antenna Switch
Remote Site Configuration
Remote Site Configuration
With Antenna Switch
Split Site Configuration
Split Site Configuration
with Local and Remote Antenna
Switches
**
7.8.1
C**
G**
M*
Cable M is optional, not required for normal system operation.
Cable B is required for Mode 3 only (replacing Cable C or Cable G if applicable).
Cables C and G are required for ACARS and Mode 2 only.
Cable Construction
The following paragraphs provide construction recommendations for each cable type. The length requirements are
determined by site rack and equipment arrangements. The typical cable consists of a single cable with 2 connector
ends, denoted P1 and P2 as shown in Figure 7-5.
P1
P2
Figure 7-5. Typical System Cable
9325-035
7-25
MX-9325
SUPPORT DATA
7.8.1.1
Cable Type “A” EIA-530 DB25 Data Cable Male/Female
This cable provides twisted pair connection for EIA–530 data between the VGC, XCVR and EU. A COTS cable
may be purchased such as Black Box Corporation EVN530–#–MF, where # is the length in feet (standard lengths
of 5, 10, 25, 50, 75, 100, 150, and 200 feet, or custom lengths available). Alternatively, a custom cable may be
constructed as described below.
The custom cable may be constructed from the material listed below:
•
•
•
1 DB25 Male Connector (Crimp & Poke): AMP HDP–20 Connector Part 747554-1, Ferrule Part
1-747579-0 (Alternate Shielded Backshell Kit – with plastic cover): AMP Kit Part 747956-1
1 DB25 Female Connector (Crimp & Poke): AMP HDP–20 Connector Part 747555-1, Ferrule Part
1-747579-0 (Alternate Shielded Backshell Kit – with plastic cover): AMP Kit Part 747955-1
Cable – Foil shield, 12 ½ twisted pairs, plenum rated: Alpha cable 58812, 24 AWG, .294” Diameter or
similar.
Table 7-21 lists the pinout of the EIA-530 Modem cable.
Table 7-21. Type “A” EIA-530 Cable Wiring
Connector Pin
Signal Description
P1 and P2
DB25 Male & Female
Chassis Ground (Shield)
Local Analog Loopback (LL)
18
TX Data A (BA)
TX Data B (BA)
14
RX Data A (BB)
RX Data B (BB)
16
RTS A (CA)
RTS B (CA)
19
CTS A (CB)
CTS B (CB)
13
DSR A (CC)
DSR B (CC)
22
Signal Ground (AB)
Remote Loopback (RL)
21
Carrier Detect A (CF)
Carrier Detect B (CF)
10
Serial Clock RX A (DD)
17
Serial Clock RX B (DD)
Serial Clock TX–External/DTE A (DA)
24
Serial Clock TX–External/DTE B (DA)
11
Serial Clock TX–Internal/DCE A (DB)
15
Serial Clock TX–Internal/DCE B (DB)
12
DTR A (CD)
20
DTR B (CD)
23
Test Mode Indicator (TM)
25
7-26
Cable Pair
10
10
11
11
12
12
13 (single)
MX-9325
SUPPORT DATA
NOTE
The EIA-530 Modem uses RS-422 signalling convention for
most interfaces. (Exceptions are the RL, LL, and TM interfaces
which use RS-423, and the ground connections.) Each RS-422
interface involves a pair of leads labeled ”A” and ”B”. The A
lead may also be referred to as (–) and the B lead may also be
referred to as (+), which reflects the fact that, in the de-asserted
(mark) condition, B is positive with respect to A.
7.8.1.2
Cable Type “B” – Timing Cable, Custom – Standard and Remote Configuration
This cable provides twisted pair connection for the 1 pulse per 6 second (1 PP 6S) Mode 3 timing signal source
from the VGC and the Transceiver Discrete I/O connector.
The custom cable may be constructed from the material listed below:
•
•
•
1 DE9 Male Connector (Crimp & Poke): Cinch Connector Part DEMA–9P Cinch Backshell Part
DMH–E–001
DA15 Male Connector (Crimp & Poke): Cinch Connector Part DAMA–15P Cinch Backshell Part
DMH–A–001
Cable – Foil shield, 1 twisted pair, plenum rated: Alpha cable 58902, 24 AWG, .210” Diameter or
similar.
Table 7-22 lists the pinout of the timing cable.
Table 7-22. Type “B” Timing Signal Cable Wiring
Circuit Name
P1 DE9 Male
P2 DA15 Male
Shield (Connect drain)
Time Ref In A (from VGC – PUL6–)
Time Ref In B (from VGC – PUL6+)
NOTE
The above interface uses the RS-422 signalling convention, with
leads labeled ”A” and ”B”. The A lead may also be referred to
as (–) and the B lead may also be referred to as (+), which
reflects the fact that, in the de–asserted (mark) condition, B is
positive with respect to A.
7.8.1.3
Cable Type “C” –Discrete I/O Cable, Custom – Split Site Configuration (Local)
This cable is a custom configuration, connecting the Channel Busy and Receiver Mute signals to/from the EU
Discrete I/O Card to the Transceiver (configured as a TX) Discrete I/O connector.
The custom cable may be constructed from the material listed below:
•
•
1 DA15 Male Connector (Crimp & Poke): Cinch Connector Part DAMA-15P Cinch Backshell Part
DMH-A-001
1 DB25 Male Connector (Crimp & Poke): Cinch Connector Part DBMA-25P Cinch Backshell Part
DMH-B-001
7-27
MX-9325
SUPPORT DATA
•
•
Cable – Foil shield, 4 twisted pairs, plenum rated: Alpha cable 58904, 24 AWG, .221” Diameter or
similar.
Shrink sleeve/Cable JacketingThe pinout of the cable is listed in the following table:
Table 7-23 lists the pinout of the Discrete I/O cable.
Table 7-23. Type ‘C’ – Timing and Discrete Signal Cable Wiring (Split TX)
Circuit Name
Signal
Transceiver
Extender Unit
Pair
Direction
P1 DA15 Male P2 DB25 Male
Shield (Drain Wire)
Shield
Chan Busy In A
EU → XCVR
Chan Busy In B
EU → XCVR
Rx Mute Out A
XCVR → EU
12
Rx Mute Out B
XCVR→ EU
13
22
NOTE
The above interfaces use the RS–422 signalling convention, with
pairs of leads labeled ”A” and ”B”. The A lead in each case may
also be referred to as (–) and the B lead may also be referred to
as (+), which reflects the fact that, in the de–asserted (mark)
condition, B is positive with respect to A.
7.8.1.4
Cable Type “D”RG-213/214 Type Coaxial Cable, COTS
The “D” cable provides the coaxial RF connection between the XCVR and the input to the Optional Antenna
Switch, between the XCVR and the building Coaxial Lightning Protector and/or between the Optional Antenna
Switch output and the building Coaxial Lightning Protector. The cable should be constructed of RG-213/214 Low
Loss Coax Cable or similar such as Belden 9913, with Type N male connectors on each end. For reference, the RF
attenuation of the RG-213/214 type cable is approximately 2.3 dB (typical) per 100 feet at 120 MHz, and
approximately 1.5 dB per 100 feet at 120 MHz for Belden 9913. This does not include connector losses. Various
cable manufacturers carry suitable cable, such as Pasternack (mfg) part number PE3062–#, where # denotes the
length in inches, or Cable Experts 9913FCN#, where # denotes the length in feet (standard lengths of 3, 6, 50, and
100 feet, or custom lengths available).
7.8.1.5
Cable Type “E”– RS–232 DB25 Cable, COTS
Male/Female and Null Modem Adapter where applicable.
The “E“ cable provides the 25-pin RS-232 serial data connection between the VGC Antenna Control port
(RS-232 DTE – DB25 male on VGC) and the optional Null Modem Adapter (and Antenna Switch) or the
Extender Unit COTS RS–232 modem (RS-232 DCE – DB25 female on unit). The cable wiring is straight
through, 25-Pin D Male/Female cable, L-COM part number CS2N25MF–#, where # denotes the length of the
cable in feet (standard lengths of 2.5, 5, 6, 10, 12, 15, 25, and 50 feet). The Null Modem Adapter is L-COM part
number DAS25R.
7.8.1.6
Cable Type “F”– RS–232 DB25 Cable, COTS – Male/Female
The “F“ cable provides the 25-pin RS-232 serial data connection between the Extender Unit COTS RS-232
Modem (RS-232 DCE – DB25 female on unit) and the control port of the Antenna Switch. The Antenna Switch
interface is assumed to be that of the Delta Electronics MCU-8 or equivalent. Note that this interface includes a
DB25 female connector on the unit, yet adheres to a DTE pinout (signal direction) convention. The cable wiring
7-28
MX-9325
SUPPORT DATA
is straight through, 25 Pin D Male/Male cable, L-COM part number CS2N25MM–#, where # denotes the length
of the cable in feet (standard lengths of 2.5, 5, 6, 10, 12, 15, 25, and 50 feet).
7.8.1.7
Cable Type “G” – Discrete I/O Cable, Custom – Split Site Configuration (Remote)
This cable is a custom configuration, connecting the Channel Busy and Receiver Mute signals to/from the
Extender Unit Discrete I/O card to the Transceiver (configured as an RX) Discrete I/O connector. The cable uses
the same material as the C cable in section 5.3; however, the pinout is different.
The custom cable may be constructed from the material listed below:
•
•
•
•
1 DA15 Male Connector (Crimp & Poke): Cinch Connector Part DAMA-15P Cinch Backshell Part
DMH-A-001
1 DB25 Male Connector (Crimp & Poke): Cinch Connector Part DBMA-25P Cinch Backshell Part
DMH-B-001
Cable – Foil shield, 4 twisted pairs, plenum rated: Alpha cable 58904, 24 AWG, .221” Diameter or
similar.
Shrink sleeve/Cable Jacketing
Table 7-24 lists the pinout of the Discrete I/O cable.
Table 7-24. Type G - Discrete I/O Signal Cable Wiring (Split RX)
Circuit Name
Signal Direction
P1 DA15 Male P2 DB25 Male
Pair
Shield (Drain Wire)
Shield
Chan Busy Out A
XCVR → EU
Chan Busy Out B
XCVR→ EU
22
Rx Mute In A
EU → XCVR
10
Rx Mute In B
EU → XCVR
11
NOTE
The above interfaces use the RS-422 signalling convention, with
pairs of leads labeled ”A” and ”B”. The A lead in each case may
also be referred to as (–) and the B lead may also be referred to
as (+), which reflects the fact that, in the de-asserted (mark)
condition, B is positive with respect to A.
7.8.1.8
Cable Type - H, MX-9325 and VGC Prime Power, COTS
This cable provides prime power to the MX-9325 or VGC. It is a commercial cord set suitable for 120/240 Vac.
One is supplied with each MX-9325. It is Volex part number 17518 (length 2M) or similar. An IEC60320 type
plug is fitted on the end which connects to the MX-9325 or VGC. The other end of the cable is left open (wires
only) for installation of an appropriate customer supplied plug and subsequent connection (or hardwiring) within
the customer’s rack or at a nearby wall location. Wiring conforms to the international color code of BLUE for AC
Line, BROWN for AC Neutral, and GREEN/YELLOW for Safety Ground.
7-29
MX-9325
SUPPORT DATA
7.8.1.9
Cable Type “J” – Extender Unit 115 Vac Prime Power, COTS
This cable provides 115 Vac prime power to the Extender Unit. One is supplied with each extender unit.
Approximate length is 2M. An IEC60320 type plug is fitted on the end which connects to the extender unit. A
NEMA 15 (3 prong North American) type plug is fitted on the other end which is intended for direct connection
to grounded 115 Vac power outlet within the customer’s rack or at a nearby wall location. If installed outside
North America and/or for 230 Vac operation, this cord is not used (see Cable K below).
7.8.1.10 Cable Type “K” – Extender Unit 230 Vac Prime Power, COTS
This cable provides 230Vac prime power to the Extender Unit. One is supplied with each Extender Unit.
Approximate length is 2M. An IEC60320 type plug is fitted on the end which connects to the Extender Unit. The
other end of the cable is left open (wires only) for installation of an appropriate customer supplied plug and
subsequent connection (or hardwiring) within the customer’s rack or at a nearby wall location. Wiring conforms
to the international color code of BLUE for AC Line, BROWN for AC Neutral, and GREEN/YELLOW for
Safety Ground. If the Extender Unit is installed in North America and operated on 115VAC, this cord is not used
(see Cable J above).
7.8.1.11 Cable Type “M” – RS-232 DE9 Cable Male/Female, COTS Maintenance Terminal
Connection
This cable provides the RS-232 serial data connection (temporary) between the Transceiver maintenance port and
the maintenance terminal. The cable wiring is straight through, 9 Pin D Male/Female cable, L–COM part number
CS2N9MF–6 or equivalent (standard 6 ft length recommended; other standard lengths are 2.5, 5, 10, 12, 15, 25,
and 50 feet – replace “6” with desired length).
7.8.1.12 Transmission Line - RF Coax Cable to Antennas
The ½ inch foam filled flexible transmission line is recommended for external and/or lengthy cables (e.g. 100
feet) to antennas. For reference, the RF attenuation of this type cable is approximately .23 dB (typical) per 100
feet at 120 MHz. RFS Cablewave part number 810918–001 (FLC12-50J) and N male connector part number
738802 (CONN FLC12–50NM) may be used (or Andrews equivalents). The use of a short section of flexible
cable (such as RG-213/214 as used in Cable Type D) to connect the antenna to the transmission line is
recommended for ease of installation and maintenance, and to limit mechanical stresses on the transmission line
connector due to antenna vibrations. All connector junctions exposed to the elements should be protected (e.g.
weatherproof by use of sealant and butyl tape). Installers should take care to provide adequate drip loops where
necessary, especially at building ingress/egress panels.
7-30
MX-9325
SUPPORT DATA
EDGE CONNECTOR
J1
J7
J11
J9
J10
J13
J2
J3
J4
J6
J8
J12
J14
9325-023
Figure 7-6. EIA-530 Modem Card
7-31
MX-9325
SUPPORT DATA
9325-024
Figure 7-9. Discrete I/O Card
7-32
MX-9325
SUPPORT DATA
11
14
15
13
10
12
9325-025
Figure 7-10. RS-232 Modem Card
7-33
MX-9325
SUPPORT DATA
9325-026
Figure 7-11. MX-9325 Interconnect
Schematic Diagram
7-35/7-36
MX-9325
INSTALLATION
CHAPTER 8
INSTALLATION
8.1 INTRODUCTION
This chapter provides installation instructions for the MX-9325 Transceiver. Paragraph 8.2 provides
recommendations and Paragraph 8.3 provides unpacking and repacking guidelines. Paragraph 8.4 provides the
step-by-step installation procedures. Paragraph 8.5 provides post-installation procedures which consist of checks,
setup, and operational tests, all of which should be performed after installation.
8.2 INSTALLATION RECOMMENDATIONS
The information contained here provides general guidelines for installing the System. Read this chapter in its
entirety before beginning installation.
8.2.1
Selection of Physical Location
When choosing a location, become familiar with the dimensions listed in Paragraphs 8.2.2 through 8.5.3. Take
into account the following:
•
Location accommodates dimensions shown on Figure 8-1.
•
Room for maintenance personnel to access cabling and connectors.
•
Room for proper ventilation (approximately 2 in [5.8 cm] around MX-9325 Transceiver chassis).
8-1
MX-9325
INSTALLATION
5.25”
18.5”
19”
9325–027
Figure 8-1. MX-9325 Transceiver Dimensions
9325-001
8-2
MX-9325
INSTALLATION
8.2.2
Grounding
When installing the MX-9325 Transceiver into a system rack, perform the following:
WARNING
Inadequate or defective grounding presents a personnel hazard
that could result in injury or death.
CAUTION
Inadequate or defective grounding could damage the equipment.
•
Connect ground braid to the ground stud provided on the rear panel.
•
Use as thick a braid as possible.
•
Make sure braid is short (typically less than six feet [182.9 cm]).
•
Connect other end of braid to TBD.
•
TBD In arid climates, use ground radials.
8.2.3
Power Requirements
The MX-9325 Transceiver is designed to be powered from a 115 Vac or 230 Vac single phase source as listed in
Chapter 1, Paragraph 1.7. When the MX-9325 Transceiver is supplied as part of a system designed by Harris,
refer to the system documentation. If installing the MX-9325 Transceiver in a customer specific application, use
the supplied AC power cable listed in Chapter 7, Paragraph 7.4.4.
8.2.4
Environmental
The MX-9325 Transceiver is designed to function in the environments listed in Chapter 1, Paragraph 1.7.
8.2.5
Access Clearance and Ventilation Requirements
When the MX-9325 Transceiver is supplied as part of a system designed by Harris, refer to the system
documentation. If installing the MX-9325 Transceiver in a customer specific application, make sure there is
approximately 2-Inches (5.8 cm) around chassis.
8.2.6
Antenna Considerations
To Be Determined.
8.2.7
Tools and Materials Required
A typical installation requires standard tools listed in Chapter 7, Paragraph 7.3.
8-3
MX-9325
INSTALLATION
8.3 UNPACKING AND REPACKING
Equipment is packed in corrugated boxes. A two-piece foam enclosure protects the equipment against abrasion
and rough handling. The boxes and packing materials should be retained in case the equipment is reshipped.
The following paragraphs describe how to unpack and repack the MX-9325 Transceiver.
8.3.1
Unpacking
Perform the following procedure to unpack the equipment:
a.
Inspect the exterior of the box for signs of damage during shipment. Note any problems and report them
to the proper authority. An external sticker on the shipping box provides additional instructions
concerning inspection of the package.
b.
Use normal care to move the boxed equipment into the general location where it is to be installed. Certain
boxes, depending on system configuration, may be heavy. Exercise care when moving boxed assemblies
to and from locations.
c.
After removing the equipment from the box, check the contents against the packing slip to see that the
shipment is complete. Report discrepancies to Harris RF Communications customer service department
(tel: 716-244-5830).
d.
Save ancillary kit contents for installation in Paragraph 8.4. Parts list for kit can be found in Chapter 7,
Paragraph 7.4.4.
8.3.2
Repacking
Perform the following procedure to repack the equipment:
a.
Use the original box if it was retained. If not, use a box that allows three inches of clearance on all sides
of the unit.
b.
Use the original packing material if it was retained. If not, use foam packing material to fill the space
between the unit and the box. Surround the entire unit with three inches of foam packing material.
c.
Use a good quality packing tape (or straps) to seal the box after closing.
8.4 INSTALLATION PROCEDURES
The following paragraphs describe the procedures performed to properly install the MX-9325 Transceiver.
NOTE
Perform the procedures in the order the paragraphs are presented
for installation. Reverse the order for MX-9325 Transceiver
removal.
8-4
MX-9325
INSTALLATION
8.4.1
Jumper/DIP Switch Settings
The following paragraphs describe the jumpers and DIP switch setting of the MX-9325 Transceiver and VHF
Extender Unit.
8.4.1.1
MX-9325 Transceiver
The MX-9325 Transceiver does not require setting of jumpers or dip-switches, however, when multiple MX-9325
Transceivers are installed in a system, their IDs need to be configured.
8.4.1.2
VHF Extender Unit
The VHF Extender Unit Modem Cards have jumper setting that need to be set depending on configuration.
Refer to Chapter 7, Paragraph 7.7.4 for jumper settings and functions.
8.4.2
Rack Mount Installation
The MX-9325 Transceiver is designed to be rack mounted on slides or brackets.
The VHF Extender Unit is designed to be rack mounted on slides or brackets.
Refer to Chapter 6, Paragraph 6.5.1 for installation procedures.
8.4.3
Stack Mount Installation
The MX-9325 Transceiver can be stack mounted as long as proper ventilation is applied between top and bottom
of equipment.
The VHF Extender Unit can be stack mounted as long as proper ventilation is applied between top and bottom of
equipment.
CAUTION
Incorrect voltage selection will damage equipment.
WARNING
Contact with line voltages will cause injury or death.
8.4.4
MX-9325 Transceiver Rear Panel Connections
Figure 8-2 shows the MX-9325 Transceiver rear panel connectors. Refer to Figures 8-4, 8-5 and 8-6 for a typical
system interconnect diagrams. Refer to Chapter 7, Paragraph 7.7 for connector data and pinout information. Refer
to Chapter 7, Paragraph 7.8 for system cabling information.
8.4.5
VHF Extender Unit Rear Panel Connections
Figure 8-3 shows the VHF Extender Unit rear panel connectors. Refer to Figures 8-4, 8-5 and 8-6 for typical
system interconnect diagrams. Refer to Chapter 7, Paragraph 7.7 for connector data and pinout information. Refer
to Chapter 7, Paragraph 7.8 for system cabling information.
8-5
MX-9325
INSTALLATION
REAR VIEW
9325-028
Figure 8-2. MX-9325 Transceiver Rear Panel Connectors
TERMINAL BLOCK (14 PLACES)
115 VAC
9325-029
230 VAC
DB-25 CONNECTOR (14 PLACES)
Figure 8-3. VHF Extender Unit Rear Panel
8.4.6
MX-9325 Transceiver and VHF Extender Unit System Interconnects.
Figure 8-4 illustrates a typical standard site system interconnect. Figure 8-5 illustrates a typical split site system
interconnect. Figure 8-6 illustrates a typical remote site system interconnect.
8-6
MX-9325
INSTALLATION
KEY
Represents a male connector (pins)
Represents a female connector (sockets)
Represents a male connector, NEMA 15 Type power plug
Represents a coax cable
Maint.
Terminal
DE9
GROUND STATION (VGC)
DB25
Antenna Switch
Control Port–Local
(RS–232 DTE)
MX–9325
TRANSCEIVER
DE9
DB 25
DB25
EIA 530
Data & Maint Port
Timing Signal
DE9
RS–422
Local Maint Port
Data & Maint Port
(Host)
Cable A
Antenna Switch
Control Port (Remote)
(RS–232 DTE)
Cable M
DA15
Discrete I/O Port
Cable B
Antenna I/F
Type N
Extender Unit Port
120/240 VAC
Cable H
120/240 VAC
CABLE H
Cable D
ANTENNA SWITCH
XCVR 1
RF
Antenna 1
Type N
Type N
XCVR 8
RF
Cable E
NULL
MODEM
ADAPTER
Antenna 8
1/2 Foamflex
Transmission Line
Lightning
Protection
and
Antennas
(CFE)
DB25 Antenna Switch
Control Port
(RS–232 DTE)
(OPTIONAL)
NOTES
CABLE A: EIA–530 DATA M/F
CABLE B: CUSTOM TIMING CABLE (REQUIRED FOR MODE 3 ONLY)
CABLE D: RG–213/214 LOW LOSS COAX
CABLE E: COTS RS–232 DATA – 25 PIN M/F
CABLE H: MX–9325 AND VGC PRIME POWER
CABLE M: COTS RS–232 DATA – 9 PIN M/F
9325-030
Figure 8-4. Typical Standard Site System Interconnect Diagram
8-7
MX-9325
INSTALLATION
GROUND STATION (VGC)
DB25
Antenna Switch
Control Port–Local
(RS–232 DTE)
MX–9325
TRANSCEIVER
DB 25
DB25
EIA 530
MX–9325
TRANSCEIVER
Maint.
Terminal
DB25
DE9
Data & Maint Port
(Host)
Data & Maint Port
Cable A
DE9
DE9
Data & Maint Port
(Host)
Cable M
DE9
Local Maint Port
Cable M
A4
Local Maint Port
Maint.
Terminal
DE9
Timing Signal
RS–422
(MODE 3)
Cable B
DB25
Antenna Switch
Control Port (Remote)
(RS–232 DTE)
Cable B
(Mode 3)
1PP 6S
TIMING SOURCE
DA15
(OPTIONAL–MODE 3 ONLY)
Discrete I/O Port
Antenna I/F
Cable C
(ACARS & Mode 2)
DA15
Discrete I/O Port
or
Type N
Cable D
Antenna I/F
Cable C
(ACARS & Mode 2)
Type N
Cable D
DB25
Extender Unit Port
Extender Unit Port
Cable A
Cable A
120/240 VAC
Cable H
120/240 VAC
120/240 VAC
Cable H
Cable H
Cable K
Cable J
Cable K
Cable J
115 VAC or 230 VAC
115 VAC or 230 VAC
ANTENNA SWITCH
PS
EXTENDER UNIT
PS
COTS EIA–530 MODEM
TB
4W
DISCRETE I/O CARD
TB
4W
DB25
DB25
PS
4W
INTERSITE
CABLE
(CFE)
(NOT REQ”D FOR MODE 3)
Cable E
DB25
OPTIONAL
EXTENDER UNIT
TB
XCVR 1
RF
DB25
COTS EIA–530 MODEM
DISCRETE I/O CARD
Antenna 1
Type N
Coax
Type N
Coax
TB
4W
XCVR 8
RF
DB25
Antenna 8
Lightning
Protection
and
Antennas
(CFE)
(NOT REQ”D FOR MODE 3)
TB
4W
TB
4W
PS
COTS RS–232 MODEM
OPTIONAL
DB25
Cable F
DB25
COTS RS–232 MODEM
Antenna Switch
Control Port
(RS–232 DTE)
REMOTE SITE
(OPTIONAL)
ANTENNA SWITCH
XCVR 1
RF
Type N
Coax
XCVR 8
RF
Cable E
LOCAL SITE
NULL
MODEM
ADAPTER
DB25
Antenna 1
Type N
Coax
Antenna 8
Lightning
Protection
and
Antennas
(CFE)
NOTES
CABLE A: EIA–530 DATA – 25 PIN M/F
CABLE B: CUSTOM TIMING SIGNAL CABLE (REQUIRED FOR MODE 3)
Antenna Switch
Control Port
(RS–232 DTE)
CABLE C: CUSTOM TIMING AND SIGNAL CABLE (REQUIRED FOR ACARS & MODE 2)
CABLE D: RG–213/214 COAX
CABLE E: COTS RS–232 DATA – 25 PIN M/F
(OPTIONAL)
CABLE H: MX–9325 AND VGC PRIME POWER
CABLE F: COTS RS–232 DATA – 25 PIN M/M
CABLE G: CUSTOM DISCRETE I/O SIGNAL CABLE (REQUIRED FOR ACARS & MODE 2)
CABLE J: EXTENDER UNIT PRIME POWER – 115 VAC
CABLE K: EXTENDER UNIT PRIME POWER – 230 VAC
9325-031
CABLE M: RS–232 DATA – 9 PIN M/F
KEY
Represents a male connector (pins)
Represents a female connector (sockets)
Represents a male connector, NEMA 15 Type power plug
Figure 8-5.
Typical Split Site System
Interconnect Diagram
Represents a coax cable
8-9/8-10
A4
MX-9325
INSTALLATION
MX–9325
TRANSCEIVER
Maint.
Terminal
DE9
Data & Maint Port
(Host)
1PP 6S
Cable B
TIMMING SOURCE
DA15
Discrete I/O Port
(OPTIONAL–MODE 3 ONLY)
DE9
Cable M
Local Maint Port
Cable J
120/240 VAC
Cable H
GROUND STATION (VGC)
Antenna Switch
Control Port–Local
(RS–232 DTE)
PS
DB 25
EIA 530
EXTENDER UNIT
DB25
Data & Maint Port
COTS EIA–530 MODEM
Cable A
DB25
Cable K
Cable K
Cable J
115 VAC or 230 VAC
115 VAC or 230 VAC
PS
PS
EXTENDER UNIT
TB
TB
4W
4W
ANTENNA SWITCH
PS
Antenna I/F
DB25
Cable D
XCVR 1
RF
Type N
DB25
Antenna 1
Type N
Extender Unit Port
COTS EIA–530 MODEM
Cable A
INTERSITE
CABLE
(CFE)
Antenna Switch
Control Port (Remote)
(RS–232 DTE)
Timing Signal
Cable E DB25
OPTIONAL
COTS RS–232 MODEM
TB
4W
DB25
XCVR 8
RF
120/240 VAC
Cable H
TB
4W
OPTIONAL
DB25
DB25
COTS RS–232 MODEM
Cable F
Antenna 8
1/2 Foarm Flex
Lightning
Protection
and
Antennas
(CFE)
Antenna Switch
Control Port
(RS–232 DTE)
(OPTIONAL)
REMOTE SITE
LOCAL SITE
9325-032
NOTES
CABLE A: EIA–530 DATA – 25 PIN M/F
KEY
Represents a male connector (pins)
Represents a female connector (sockets)
CABLE B: CUSTOM TIMING CABLE (REQUIRED FOR MODE 3 ONLY)
CABLE D: RG–213/214 LOW LOSS COAX
CABLE E: COTS RS–232 DATA – 25 PIN M/F
CABLE F: COTS RS–232 DATA – 25 PIN M/M
CABLE H: MX–9325 AND VGC PRIME POWER
Represents a male connector, NEMA 15 Type power plug
CABLE J: EXTENDER UNIT PRIME POWER –115 VAC
Represents a coax cable
CABLE K: EXTENDER UNIT PRIME POWER –230 VAC
Figure 8-6.
Typical Remote Site System
Interconnect Diagram
CABLE M: COTS RS–232 DATA – 9 PIN M/F
8-11/8-12
MX-9325
INSTALLATION
8.5 POST-INSTALLATION PROCEDURES
8.5.1
Inspection of Installation
When the radio system is installed and all connector cables are attached, verify that the following items are
completed:
•
All connectors are attached and tight.
•
All associated hardware is secure.
•
The equipment cannot be tipped over or moved.
8.5.2
Initial Settings and Power On
Table 8-1 lists the initial settings and power on procedures.
Table 8-1. Initial Settings and Power On Procedure
Step
a. Connect a 50-Ohm RF attenuator to
rear panel connector J104.
b. Place PC or terminal POWER
switch in ON position.
c. If using a PC, run the desired
terminal emulation program.
d. Ensure that the terminal emulation
software or terminal is correctly
configured.
Observe
Reference
The PC boots or terminal powers
on.
The PC runs the terminal
emulation program.
Refer to PC or terminal operation
instructions.
Refer to software operation instructions for more information.
Refer to Chapter 3, Paragraph
3.2.1. Also refer to terminal or
emulation software operation
instructions.
If the PC or terminal does not
display the power-up screen, refer to the non-BIT
troubleshooting procedures in
Paragraph 5.2.3.
Refer to the BIT troubleshooting
procedures in Paragraph 5.2.2.
e. Place POWER switch on MX-9325
Transceiver front panel in the ON
position.
The PC or terminal displays the
power-up screen. See Figure
TBD.
f.
If a BIT fault is displayed on the
PC or terminal as a result of the
BIT command, write down the
fault code.
If no errors occur during BIT,
continue operating the radio
system in an attempt to generate
a run-time fault. Periodically
enter the tst  command
in order to force the transmitter
into running BIT.
PC or terminal keyboard, type BIT
command: bit v .
If a run-time fault is generated,
refer to the non-BIT troubleshooting procedures in Paragraph
5.2.3. If a BIT fault is generated,
refer to the BIT troubleshooting
procedures in Paragraph 5.2.2.
If no fault is generated, return
radio system to operational
readiness.
8-13
MX-9325
INSTALLATION
8.5.3
Radio Check
After installing the MX-9325 Transceiver and it has passed the initial setting and power on procedure a radio
check should be preformed. A radio check consists of programing for channels, modes, and power levels that are
going to be used. Transmit and receive between two stations with identical programming/configurations. During
back-to-back tests, verify the following:
•
All channels used
•
All modes
•
All power levels
8-14
MX-9325
GLOSSARY
APPENDIX A
GLOSSARY
A.1 GLOSSARY
The following provides a glossary of Abbreviation and Acronyms used in this manual.
List of Abbreviations and Acronyms
Abbreviation
Term
A, AMP
Ampere(s)
ac, AC
Alternating Current
ACARS
ADC
Aircraft Communications Addressing and Reporting systems
Analog-to-Digital Converter
ADS
Automatic Dependent Surveillance
ANSI
American National Standards Institute
ANT
Antenna
AOC
Aeronautical Operational Control
ARTCC
Air route traffic control center
ASCII
ATC
ATCRBS
American Standard Code for Information Interchange
Air Traffic Control
Air traffic control radar beacon system
ATCT
air traffic control tower
AVPAC
Aviation VHF Packet communications
AUX
Auxiliary
AWG
American Wire Gauge
BERT
BPS
Bit Error Rate Tester
bits per second
BSI
British Standard Institute
BIT
BITE
BW
Built-In Test
Built-In Test Equipment
Bandwidth
Centigrade/Celsius
CAA
civil aviation authority
CARC
CB
CBIT
CCW
CE
Chemical Agent Resistive Coating
Circuit Breaker
Continuous Built-In Test
Counterclockwise
European Community
cm
CMU
Centimeter
Communication Management Unit
A-1
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
COTS
CPLR
CR
CSA
Commercial Off-the-Shelf
Coupler
Carriage Return
Canadian Standard Association
CSMA
D8PSK
Carrier Sense Multiple Access
Differential 8 Phase Shift Keying
DAC
Digital-to-Analog Converter
DAM
Direct Access Memory
dB
Decibel(s)
dBm
Decibels referenced to 1 milliwatt
dc, DC
Direct Current
DCD
Data Carrier Detect
DCE
Data Circuit Terminating Equipment
DE
Data Encryption
Demod
Demodulated
Diff
Differential
Dip, DIP
Dual In-Line Package
DMM
Digital Multimeter
DP
Double Pole
DPDT
Double Pole, Double Throw
DPRAM
Dual-Port RAM
DPST
Double Pole, Single Throw
D/A
DSP
Digital to Analog
Digital Signal Processor
DSR
Data Set Ready
DTE
Data Terminal Equipment
DTL
Diode Transistor Logic
DTM
Data Text Message
DV
Digitized Voice
DTMF
Dual Tone Multi-Frequency
DTR
Data Terminal Ready
DUART
Dual Universal Asynchronous Receiver-Transmitter
DUSART
Dual Universal Synchronous/Asynchronous Receiver-Transmitter
DVM
Digital Voltmeter
DVOM
Digital Volt-Ohm Meter
A-2
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
EAM
Embedded Adaptive Module
EAROM
Electronically Alterable Read Only Memory
ECM
Electronic Counter Measure
ECCM
EEPROM,
Electronic Counter-Counter Measure
E2PROM
Electrically Erasable Programmable Read Only Memory
EMI
Electromagnetic Interference
EIA
Electronic Industries Association
EOM
End of Message
EPROM
Erasable Programmable Read-Only Memory
EUROCAE
The European Organization for civil aviation Equipment
FAA
Federal Aviation Administration
FCC
Federal Communications Commission
FD
Full Duplex
FEC
Forward Error Correction
FET
Field-Effect Transistor
F/F
Flip-Flop
FFT
Fast Fourier Transform
FH
Frequency Hopping
FSK
Frequency Shift Keying
F/W, FW
Firmware
G-A, G/A
Ground-to-Air
GF
Government (or customer) Furnished
GFE
Government-Furnished Equipment
Gnd, GND
Ground
GNI
Ground Network Interface
GPIB
General Purpose Interface Bus
GUI
Graphical User Interface
HD
Half Duplex
HDCP
Harris Data Communications Protocol
HDLC
HF
High-Level Data Link Control
High Frequency
HSS
High-Speed Synchronizer
HSSB
High-Speed Serial Bus
HWCI
Hardware Configuration Item
Hz
Hertz
A-3
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
IC
Integrated Circuit
ID
Identification
IDF
Intermediate Distribution Frame
IF
Intermediate Frequency
INT
Interrupt
INTLK
Interlock
INTR
Interrupt
I/O
Input/Output
ICAO
International Civil Aviation Authority
ISB
Independent Sideband
ISO
International Standards Organization
Joules
Kilo (thousand)
KBPS
Kilo Bits Per Second
kbyte
Kilobyte
kHz
Kilohertz
km
Kilometer(s)
kV
Kilovolt(s)
kVA
Kilovolt Ampere(s)
KVD
Keyboard Visual Display
KVDU
Keyboard Visual Display Unit
kW
Kilowatt(s)
LAN
Local Area Network
LAPB
LBT
Link Access Protocol, Balanced
Listen Before Transmit
LC
Inductive Capacitive
LCD
Liquid Crystal Display
LD
Lock Detect
LED
Light-Emitting Diode
LF
Low Frequency
LLSB
Lower Lower Sideband
LOS
Line of Sight
LP
Low Pass
LPC
Linear Predictive Coding
LQA
Link Quality Analysis
A-4
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
LRU
Line Replaceable Unit
LSB
Lower Sideband
LSD
Least Significant Digit
Meter, Mega (one million)
Milli, one-one thousandth
mA
Milliampere(s)
MART
Multimode Aeronautical Radio System
Mbyte
Megabyte
MDM
MODEM
MHz
Megahertz
MIC
Microphone
MIL-STD
Military Standard
mm
Millimeter(s)
Mod
Modification, Modulated
Mod/Demod
Modulator/Demodulator
Modem
Modulator/Demodulator
MOPS
MOS
Minimum Operational Performance Standard
Metal Oxide Semiconductor
MOSFET
Metal Oxide Semiconductor Field Effect Transistor
ms, msec
Millisecond
MSK
Minimum Shift Keying
MTBCF
Mean Time Between Critical Failure
MTBF
Mean Time Between Failure
MTBM
Mean Time Between Maintenance
MTBR
Mean Time Between Replacement
MUF
Maximum Usable Frequency
Mux
Multiplex, Multiplexer
mVac
Millivolts Alternating Current
mVdc
Millivolts Direct Current
Nano (1 x 10–9)
NB
Narrowband
NC, N.C.
Normally Closed
N/C
Not Connected
NMOS
N-channel Metal-Oxide-Semiconductor
NO, N.O.
Normally Open
A-5
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
No.
Number
NPN
N-type, P-type, N-type (transistor)
nsec
Nanoseconds
NVG
Night Vision Goggles
Ohms, a unit of resistance measurement
O&M
Operation and Maintenance
O&R
Operation and Repair
O.C.
Open Circuit or Open Collector
OEM
Original Equipment Manufacturer
Op Amp
Operational Amplifier
OCXO
Oven Controlled Crystal Oscillator
Pico
PA
Power Amplifier
PBIT
PABX
Periodic Built-In Test
Private Automatic Branch Exchange
PCB
Printed Circuit Board
PC
PCM
Personal Computer
Pulse Code Modulation
PEP
Peak Envelope Power
pF
Picofarad (1 x 10–12 Farads)
PIV
Peak Inverse Voltage
PLL
Phase-Locked Loop
PNP
P-type, N-type, P-type (transistor)
P-P
Peak-to-Peak
PPS
Pulse Per Second
PROM
Programmable Read Only Memory
PS
Power Supply
Pt Pt, Pt-Pt
Point-to-Point
PTT
Push-to-Talk
PWB
Printed Wiring Board
QTY
Quantity
R, RG
Receiver Circuit: Receive, Receive Ground (from teletype)
RAD
Random Access Data
RAM
Random Access Memory
RC
Resistive Capacitive
A-6
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
RCU
Remote Control Unit
RCV/RX
Receive
RCVR
Receiver
RD
Read
RDY
Ready
REC
Receptacle
RETX
Retransmit
RF
Radio Frequency
RFI
Radio-Frequency Interference
RLPA
Rotatable Log Periodic Antenna
RLSD
Receive Level Sense Detect
RMS
Root Mean Squared
ROM
Read-Only Memory
RST
Reset
RTC
Real Time Clock
RTN
Return
RTS
Request to Send
RTTY
Radio Teletype
RTU
Remote Terminal Unit
S, SG
Send Circuit, Send Ground (to teletype)
SA
Spectrum Analyzer
SB
Sideband
SCR
Silicon Controlled Rectifier
SHLD
Shield
SINAD
A ratio of (signal + noise + distortion) to (noise + distortion) used to measure
the signal quality of a communication channel. SINAD is commonly used to
evaluate the ability of a channel to pass voice traffic.
Sip, SIP
Single In-Line Package
SMD
Surface-Mount Device
SNR
Signal-to-Noise Ratio
SOM
Start of Message
SP
Single Pole
SPDT
Single-Pole, Double-Throw
SSB
Single Sideband
ST
Single Throw
A-7
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
SWR
Standing Wave Ratio
SYNC
Synchronous
TB
Terminal Board
TCXO
Temperature Controlled Crystal Oscillator
TDQPSK
Time Differential Quaternary Phase Shift Keying
TGC
Transmitter Gain Control
T/R
Transmit/Receive
TT
Teletype
TTL
Transistor-Transistor Logic
TT VFT
Teletype Voice Frequency Tone
TTY
Teletype
TX
Transmit
Micro (1 x 10–6)
UART
Universal Asynchronous Receiver-Transmitter
uF
Microfarad (1 x 10–6 Farads)
UHF
Ultra High Frequency
USART
Universal Synchronous/Asynchronous Receiver-Transmitter
USB
Upper Sideband
usec
Microseconds
UUSB
Upper Upper Sideband
UUT
Unit Under Test
uW
Microwave
Volt
VA
Volt-Ampere
Vac
Volts, Alternating Current
VCA
Voltage Controlled Attenuator
VCO
Voltage Controlled Oscillator
VCTCXO
VDC, Vdc
Voltage Controlled Temperature Compensated Crystal Oscillator
Volts, Direct Current
VDL
VHF Data Link
VDU
Video Display Unit
VECT
Vector
VF
Voice Frequency
VFO
Variable Frequency Oscillator
VFR
Voice Frequency Repeater
A-8
MX-9325
GLOSSARY
List of Abbreviations and Acronyms – Continued
Abbreviation
Term
VGC
VHF
VHF Ground Station Computer
Very High Frequency
VLF
Very Low Frequency
VMOS
V-groove Metal-Oxide-Semiconductor
VOM
Volt-Ohm-Meter
VOX
Voice Operated Transmitter
Vpp
Volts peak-to-peak
VSWR
Voltage Standing Wave Ratio
Watt(s)
WRL
Wire Run List
XCVR
Transceiver
XMT
Transmit
XMTR
Transmitter
A-9
MX-9325
GLOSSARY
This page intentionally left blank.
A-10
MX-9325
MAINTENANCE LEVELS
APPENDIX B
MAINTENANCE LEVELS
B.1 MAINTENANCE LEVELS
Figure B-1 describes the Harris defined and supported maintenance levels.
B-1
MX-9325
MAINTENANCE LEVELS
B-2
MAINTENANCE CONCEPT OUTLINE
CORRECTIVE
AND PREVENTIVE
MAINTENANCE
LEVEL I
HUMM,
THERE’S
SOMETHING
WRONG WITH
MY SYSTEM
NO SPECIAL ITEMS
TRAINING
SPARES
LEVEL III
LEVEL IV
I SEE, THE
PROBLEM IS
WITH THE PA.
WELL...BIT
LEADS ME TO
SUSPECT A
FAULTY MODULE
THAT’S THE
PROBLEM WITH
THE MODULE...
A BAD IC!
MODULE#: A30
FAULT #: F12
PA BAD FILTER
NO SPECIAL ITEMS
NO TOOLS/TEST
EQUIPMENT
SOFTWARE
MAINTENANCE
PROGRAMS
TECHNICAL
MANUALS
COMMON TOOLS
AND
TEST EQUIPMENT
MAINTENANCE
REPAIR KITS
PA BAD FILTER
LEVEL II
TEST FIXTURE
DATA
UNIT
MAINTENANCE
MANUAL
SYSTEMS
MANUAL
SCHEMATIC PACKAGE
TECHNICAL REPAIR
STANDARD
SMT REPAIR
OPERATOR
TRAINING
SYSTEMS
MAINTENANCE
TRAINING
LEVEL IV MAINT
TRAINING
UNIT
MAINTENANCE
MANUAL
PRE–FAULTED
MODULES
NO SPARES
MCO–001A
Figure B-1. Harrris Defined Maintenance Levels
TECHNICAL PUBLICATION
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MANUAL TITLE:
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PARTS LISTS
SCHEMATIC DIAGRAMS
CHAPTER
INTRODUCTION/GENERAL INFORMATION
OPERATION
FUNCTIONAL DESC/THEORY OF OPERATION
SCHEDULED MAINTENANCE
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REVISION:
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HARRIS CORPORATION RF COMMUNICATIONS DIVISION
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