Cubic Communications MTC-100TMCPA MTC-100T MCPA User Manual manual

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TECHNICAL MANUAL
OPERATION INSTRUCTIONS
VHF TRANSMITTER
MTG-1 00T
fi
Cubic Communlcations, Inc.
9535 Waples SIreeI
San Diego, CaliIDrnia 92121-2953
Telephone: (553) 54375300 TeleIax: (553) 643-5303
Manual ParI N0. 30034021'8
Issue 1.0
30 JUNE 2000
MTC-100T TECHNICAL MANUAL ©CUBIC‘» COMMUNICATIONS
Amomwolm- Cumeunbnl-mlryvlmmhn
RECORD OF CHANGES
CHANGE TITLE OF BRIEF DESCRIPTIONS ENTERED BY
Issue 1.0
© CUE lc. CQMMUNl cAT'QNS MTC-100T TECHNICAL MANUAL
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FOREWORD
SCOPE
This manual contains information to obtain best perfommnce from the MTC-IOOT Transmitter. The information includes: a
general description of the equipment, preparation for use and installation instructions, operating instructions, general theory
of operation, maintenance instructions, preparation for reshipment, storage, and parts list.
PROPRIETARY DATA
Infomtalion contained in this document is the property of Cubic Communications. Inc This information may not be disclosed
to a third party. either wholly or in part, without the written consent of Cubic Communications, Inc,
CORRECTION NOTICE
Information contained in this document is believed to be correct as of the publication date. If a variation is noted between the
information in this manual and the equipment in your possession, contact the factory for clarification. Future issues will be
updated if necessary.
RIGHTS RESERVED
Cubic Communications, Inc. reserves the right to change the specifications, design details, and method of fabrication of the
equipment at any time without notice.
Issue 1.0 i
MTG-100T TECHNICAL MANUAL
©CUBIC.CDMMUNICATIDN5
A mmbqlpfm- mammnyummm
TABLE OF CONTENTS
Cr_t_agler m
1 GENERAL DESCRIPTION ..... 1-1
1 - I INTRODUCTION ..................... 1>1
1-2 EQUIPMENT DESCRIPTION , T . 1
1—3 SPECIFICATIONS ............. 1
1—4 EQUIPMENT FURNISHED . . . 1
1-5 STORAGE DATA ........... 1
1-6 TOOLS AND TEST EQUIPMENT . . 1
1-7 SAFETY PRECAUTIONS ......... 1
2 PREPARATION FOR USE AND
INSTALLATION INSTRUCTIONS 2-1
2-1 INTRODUCTION , .
2-2 UNPACKING AND INSPECTION
2-3 INSTALLATION ................ 4 A
2-4 CONNECTIONS .....................
3 OPERATING INSTRUCTIONS . 3-1
3-1 INTRODUCTION ..................... 3-1
3-2 REMOTE OPERATION USING
SERIAL BUS. . . 4 3-1
3-21 MTC—lUDT Setup , . . 4 3-1
3—21 Software Installation Up Grade
Procedure
3—23 Serial Bus Description ,
3-2.4 Serial Bus Message Farmal , 373
3-25 Serial Bus Message Types . , . , 3-3
3—Z.5.1 Serial Bus Command Messages . 3-3
3-25.111 Serial Bus Radio Command
Messages .................. 373
3-2512 Serial Bus Interface Command
Messages ................... 3-3
3-252 Serial Bus Slams Messages v . 4 . 3-3
3—25.21 Serial Bus Radio Status
Messages ................... 3-3
3-25.22 Serial Bus lurerface Slams
Messages .................. 3-3
3-26 Serial Bus Message Protocol . 4 . 3—5
316.1 Serial Bus NormalMode ...... 3—5
3—2.6.2 Serial Bus Acknowledge Mode I 375
3—27 Line Driver Operation . . . 375
3-28 Broadcast Address . . 4 , . , 3—5
3-29 Serial Bus Message Defi/Iilioh . . 3—5
3-3 POWER UP AND TESTING
CONSIDERATIONS , .
Chapter Page
4 MAINTENANCE INSTRUCTIONS 4-1
Section II PREVENTIVE
MAINTENANCE .......... 4—1
4-1 INTRODUCTION ................
4—2 CLEANING AND LUBRICATION A
4-3 INSPECTION .............
4-3.1 External Inspection .
4—32 lnlemallnspeclion ..
4—4 PERFORMANCE VERIFICATION
4-41 External Connections .......
4-412 TransmitterPerj’ormance
Verification ................... 4-2
Section II. CORRECTIVE J
MAINTENANCE ........ 4-3
4—5 TROUBLESHOOTING ................ 4—3 ‘
4-5.1 Troubleshooting Philosophy 473
4-51 Builr~ln Tesls. , ., .. 4-3
45.2.1 POST .
4-512 BIT...
4—53 Troubleshooting Procedure
45.3.1 Initial Checks ........
4-532 Fault ldenlificalian .
4-6 SOFTWARE UPIDADING ............. 4—5
5 PREPARATION FOR
RESHIPMENT ................. 5-1
5-1 INTRODUCTION ...............
5—2 DISASSEMBLY AND REMOVAL
5-3 PACKAGING . .
5-4 SHIPPING ..
6 STORAGE 6-1
6-1 INTRODUCTION ..................... 6—1
6-2 STORAGE ENVIRONMENT .. .. 6—1
6—3 PRESERVATION 16-1
7 PARTS LIST .................... 7-1
7-1 INTRODUCTION .................... 7—1
7—2 REPLACEABLE PARTS LISTING ...... 7—1
Issue 1.0
©GUBIC- COMMUNICATIONS MTC-1OOT TECHNICAL MANUAL
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LIST OF ILLUSTRATIONS
Fi ure mg
1-1 MTC-lOOT Front View ............................................ . . 10
2-1 MTC— 1 OOT Rear View ................................... 2—2
2-2 AC Power Connector (17) Pin Descriptions 2.3
3-1 DIP Circuit Switch Settings ............ 3-1
3-2 Serial Bus Message Format i 4 A _ 344
3-3 Serial Bus Character Format ................... 3-4
F071 MTCelOOT Outline and Mounting Drawing . , ,,,,,, F111
FO-Z MTC-IOOT Block Diagram ............. _ _ _ FP.3
FO-3 MTC—IOOT Interconnect Diagram ........................ FP-S
F0-4 MTC-IOOT Replaceable Parts Locator Diagram ............................... FP-7
Issue 1.0 iii
MTC-100T TECHNICAL MANUAL © CUB |c. CDMMUNICATl DNB
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LIST OF TABLES
Laws
MTC—IOOT Specifications ................................................. 1-2
Items Furnished ............. l-3
Recommended Tools and Test Equipment (Or Equivalent) ....................... 1-3
Rear Panel Connections ..................................................
AUDIO Connector (J 1) Pin Descriptions .....
Maintenance Connector (12) Pin Descriptions , .
Serial Bus Interface Command Messages ..............................
Serial Bus Interface Status Messages ................................. . . 3-6
Primary Operational Commands ............................................ 3-7
Secondary Operational Commands . .
Utility Commands .............
Measurement Request Commands ......................
Built In Test Diagnostics .............................. . 4 3-12
Fault Messages .............................................. , .......... 4~4
Replaceable Parts. ....................................................... 7-l
Issue 1.0
MTC-1OOT TECHNICAL MANUAL ©CUBIC- COMMUNICATIONS
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MTC-100T TECHNICAL MANUAL
CHAPTER 1
GENERAL DESCRIPTION
1-1 INTRODUCTION.
This chapter contains an equipment description, equipment
supplied and required, storage data, tools and test
equipment, and a summary of safety precautions.
1-2 EQUIPMENT DESCRIPTION.
The MTCleOT Transmitter (figure 1-1) is a
superheterodyne design using digital signal processing
(DSP) and direct 1&Q digital modulation in transmit. The
DSP gives superior accuracy and flexibility for
modulation. The MTC-lOO T has a frequency range from
150 MHz to 174 MHz with 12.5 kHz channel spacing.
The transmitter contains circuit card assemblies and
modules mounted in a 19" wide by 1.75" (lU) high by
19.5" deep rack»mount chassis.
The transmitter is controlled through a remote interface by
any suitable bus controller using an RS-232 serial interface
bus, using specific command messages to request status or
change conditions of the transmitter. There are three LED
indicators on the front panel which provide power, no—
fault and transmit status.
The Power LED is green or off. Green indicates that
power is being supplied to the unit. If the power LED is
off, there is no power being supplied to the unit.
The No Fault LED is green, flickering, or off. Green
indicate that the unit is working perfectly. Flickering
indicates the power supply or voltage control oscillator
(VCO) is not working correctly. If the No Fault LED is off
and the Power LED is green (on), then various fault
conditions can exist. Refer to paragraph 33 for fault
detemiination.
The Transmit LED is red or off. Red indicates that the
transmitter is keyed and a signal is being emitted. When
the LED is off no signal is being emitted.
The 600 Q balanced line audio input is available on the
rear Audio 15 pin D-subminiature connector.
An internal 10 MHz reference frequency is used.
Issue 1.0
1-3 SPECIFICATIONS.
Refer to table 1-1 for specifications of the equipment.
1-4 EQUIPMENT FURNISHED.
Table 1-2 lists the items furnished, items required but not
furnished, and optional items.
1 -5 STORAGE DATA.
Refer to Chapter 6 for storage data.
1-6 TOOLS AND TEST EQUIPMENT.
Table 1—3 lists recommended tools and test equipment for
operational level maintenance. There are no special tools
or test equipment required.
1-7 SAFETY PRECAUTIONS.
Safety precautions are presented in this manual preceded
by the word WARNING or CAUTION just prior to the
point where the hazard is likely to be encountered.
Warnings and cautions are defined as follows:
Refers to a procedure or practice that, if not
correctly followed, could result in injury,
death, or long term health hazard.
Refers to a procedure or practice that, if not
correctly followed, could result in equipment
damage or destruction.
1-1
MTG-1007 TECHNICAL MANUAL ©CUBIC-CDMMUNICATIDNS
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Table 1- 1 MT C— 1 HOT Seecifications.
Item
FREQUENCY
Tuning Range
geclfication
150 MHz - 174 MHz
Tunin Tlme Can tune to an of the 12.5 kHz channels within 100 ms
Channel Spacing 125 kHz
Frequency Stability
TRANSMIT FUNCTION
2 ppm (0°C to +40°C)
Antenna Im-edance 50 ohms nominal
Channel Spacing 12.5 kHz
“R_emote RS- 232
Load VSWR Caacit _. rates intoan nassive load
Transmitter Total Harmonic THD <5% across 300 Hz to 3400 Hz
Distortion
Radiated Spurious Emissions <-37 dBm
FM (F315), 750 ms Ere-empahsis
Modulation
RF Carrier Power +20 dBm maximum
Act-usable 1m... 0 15... m +20 as... m 1 dBm m
Operation Duty Cycle Continuous
Intermodulation Attenuation At least —40 dBc
Audio Frequency Response @ 25 kHz 300 to 3400 Hz: 3 4 dB (+1, -3 dB/ref 1 kHz)
5 -15 dB at 100 Hz: s -20clB at 5000 Hz
< 1.5 msee (Goin from Transmit —‘ idle or idle —' Transmit)
Test Generator
Built in tone and noise source for modulation analysis. Tone frequency
adjustable from 50-6000 Hz
GENERAL DATA
90 - 260 VAC, 47 —63 HZ, 100 W
19" (48.26 cm) wide, 1.75" (4.45 cm) high, 19.5" (49.55 cm) deep
10.7 lbs. (4.85 kg) (Unpackaged)
Power Requirements
Dimensions
Weight
Temperature Range —20 to 440°C Operating. -20 to +60°C Storage.
Humidity Per method 507.3. procedure 1, Natural table 5073-1. five cycles total
Shock Method 516.4, procedure VI
Vibration
Method 514.4Qrocedure 1, category 9 figre 514.4»15
Fault Monitoring
jfliabfliw 61 William MIBF
Fault detectors continuously monitor voltage levels and phase lock.
1-2 Issue 1.0
©3UB|C¢COMMUNIBATIONS MTG-100T TECHNICAL MANUAL
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Table 1-2 Items Furnished.
Nomenclature FurnJOptI.
3003—1000 8 MTC-lOOT VHF Transmitter Furn.
696—012 AC ower cord
Table 1-3 Recommended Tools and Test E . uimenl Or E - uivalen! .
Nomenclature Manufacturer
Screwdriver, Phillips 6 inch, No. 1
Screwdriver. Phillips 6 inch, No. 2
Wrench, open end. 5/16 inch
Wrench, open end, 9/16 inch
2598540054 Engage/Discngage OSMT Cable Tool
Issue 1.0 1-3/(1—4 blank)
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MTG-1 DOT TECHNICAL MANUAL
CHAPTER 2
PREPARATION FOR USE AND INSTALLATION INSTRUCTIONS
2—1 INTRODUCTION.
This chapter contains unpacking, inspection, installation,
connections, and initial alignment procedures.
2-2 UNPACKING AND INSPECTION.
To unpack and inspect the transmitter for damage, perform
the following procedures:
Do not drop the equipment when lifting or
carrying. Personnel injury or equipment
damage may occur.
1. Inspect the shipping canon for damage before
unpacking the transmitter.
NOTE
If the canon is damaged, open the carton in
the presence of a shipping can-ier agent if
possible. If damage is found after the
transmitter is unpacked, retain the carton
and packing materials for inspection.
2. Open the carton and remove the foam packing
material on top of the transmitter.
3. Lift the transmitter from the carton.
NOTE
Save carton for possible reshipment.
4. Inspect the transmitter for external damage
including dents and scratches.
Do not attempt to operate the transmitter if
major damage is found.
Issue 1.0
2-3 INSTALLATION.
The transmitter is designed for 19-inch rack mount
operation in a relatively dust free environment with an
ambient temperature range between 0 and +40°C. No
special tools or additional materials are required for
installation.
NOTE
See figure FO»1 for clearance
requirements and mounting details.
2-4 CONNECTIONS.
Refer to table 2-1 for a description of the rear panel
connections, (see figure Z—l .)
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2-2 Issue 1.0
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Table 2-1 Rear Panel Connections.
Connecior
On Unit
lS-pin “n-
Recommended Description
Matin T
AUD|0 (ll) ls-plu ”D" suhmmlamm
Used lo conneel audlo and control funcllons la lhe remote
subminizllue male female (3244370) conlmller or other equlpmenlv Table 2—2 lists the pin
(324~009) descriglions
MAINTENANCE
(12)
ZSrpin mule D
submillialurc Conneclon
254pin female D sub-
minlalure conneclor
For RS-232C remolc comm] funclions. Table 2-3 lisls ll'lc
nln descriEllons. Wlmd as DTE
ANTENNA (15)
AC POWER U7)
Veclur Feedback (is)
me sp _
DIP S [Ches (SI) -
N Type lack
(321 006)
N Type Plug Coaxial antenna connecuoru lmpedznc: is approximately
50 ohms
[EC 320~C~I3 NEMA 545?
(343-005) (69601; Power Cord)
SMA Female SMA Plug
(321-054)
NOTE: Pan numbers ill parenlhais (DOD-OM) indlcme CC] part number if applicable.
90 lo 260 VAC. 47 m 63 Hz, single phase IDO wrms mnxv
Fl_llre 2-2 shows (he lill descn mans
Um! to connect a samyle of power amplifier RF uulpul I0
me vector feedback sysrem Sumple should be nncnunwd (0
+I5 dBm when llle vwerumnllfier uulur is at +20 dBm
Yower Switch MTC-lOOT Ecwcr Oil/off,
Used In sel llre bus address. Refer lo figure 3-1 for proper
swilch selllrr - s.
DlP Swilcllex (SZ)
Used lo tel llle Bool/Nonnal, bus sn'ure & Type,
BlTS/ParilylSlop urrd Baud Raler Refer lo figure 3-1 for
.m. rswilch palms -
GROUND
(GREEN)
J7 POWER
HOT NEUTRAL
(BLACK) (WHITE)
Figure 2-2 AC Power Connector
(J7) Pin Descriptions.
Issue 1.0 2.3
MTc-100T TECHNICAL MANUAL ©cu51c.cuMMUN|cAT|uNs
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Table 2-2 AUDIO Connector J1 Pin Descri (ions.
600 ohm balanced line
600 ohm balanced line
Ground Io ke transmitter
Reserved
Reserved
2-4 Issue 1.0
©CUBIC- COMMUNICATIONS MTC-100T TECHNICAL MANUAL
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Table 2-3 MAINTENANCE Connector (Jz) Pin Descri tions.
Remarks fl
RS—232 Transmit Data
RS-232 Receive Data
RS-232 lieguest To Send
Not used
Signal Ground
NOTE: The pinout for the RS—232 interface follows the recommendations of the EIA standard.
The transmitter will operate as Data Terminal Equipment (DTE). This means that the circuits named Transmitted
Data and Request to Send are outputs from the transmitter and the circuit named Received Data is an input to the
transmitter. The electrical characteristics of the interface will conform to either EIA standard RS~232~C with the
following exceptions. J
When so configured from the rear panel DIP switches, the line drivers associated with the Transmitted Data and
Request to Send circuits for the unit will be in a high impedance state except when that unit has been commanded by
the system controller to transmit. When done transmitting, the line drivers will return to the high impedance state.
This feature, referred to as has sharing or party line operation, allows multiple transmitters to share a single circuit
for the Transmitted Data signal to the system controller. In systems where only one transmitter is connected to the
external controlling device, this feature may be disabled from the transmitter rear panel switches.
The Request to Send (RTS) handshake circuit is generally not used when the line drivers are configured for bus
sharing operation When the line drivers are not configured for bus sharing, the operation of the RTS line is as
follows: When a transmitter is ready to accept remote control commands it will set the RTS circuit true. When it has
received a message and is processing the commands, it will set the RTS circuit false until it is ready to receive another
command,
The number of M TC-toaT transmitters that may be connected to a single controller is dependent on the driver
characteristics of the controller, but in general is at least I 0 transmitters The input resistance of the RXD signal is
. approximately; 5000 Ohms.
If connected directly to a computer interface, abo configured as DTE, a reversal of transmit and receive data (TXD
and RXD) and request to send and clear to send (RTS and CTS) lines is necessary.
NOTE
A CTS line is not configured on the MTC-lOOT. Therefore, there
is no CTS fl RTS connection from the transmitter to the computer,
These reversals or jumpers are normally not required if units are connected through a modern. lfan MTC-IMT
transmitter is to be connected to another DTE device as its controller, the circuits must be swapped for proper
opemlion as follows:
M TC-100T Transmitter Other DTE Device
Transmitted Data Received Data
Received Data Transmitted Data
Request to Send Clear to Send
Si, nal Ground St: not Ground
Issue 1.0 2-5/(2-6 blank)
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MTC-100T TECHNICAL MANUAL
CHAPTER 3
OPERATING INSTRUCTIONS
3-1 INTRODUCTION
The MTC-IOOT transmitter is remotely controlled via a
serial interface on the Maintenance Port. The serial line
interface standard available for the MTC-lOOT transmitter
is RS-232.
Parameters associated with the remote control interface can
be checked and changed from the rear panel of the
transmitter. The bus address, bus type (RS-232). baud rate,
bus sharing option, and line parameters may be set. (Line
parameters include number of data bits, number of stop bits
and parity options).
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3-2 REMOTE OPERA'HON USING SERIAL
BUS.
The transmitter is operated under remote control using a
serial bus and a suitable controller. Ensure that the
communications parameters are set in accordance with the
system requirements. The bus address. baud rate, number
of data bits, type of parity used, and number of stop bits
must match the requirements of the system controller. The
bus type selection (52-2) should always be set to “OFF”
3-2.1 MTC>100T Setup.
Before operating the equipment, set the Dmitches on
the rear panel for correct remote operation (refer to figure
3-1). The factory default settings provide a starting point;
where all DIP switches are OFF except for S-2(5) and
S~2(7), which are ON to establish the baud rate at 38,400,
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Issue 1.0
MTC-100T TECHNICAL MANUAL
342.2 Software Installation Uggrade Procedures.
If it becomes necessary, the internal software may be
upgraded by connecting the Maintenance Port to an IBM
compatible PC running DOS or a DOS window under
WindowsWt Use the Cubic-furnished program RCOMM,
and connect the computer serial port to the Maintenance
Port with a suitable cable. In most cases a “Null Modern”
cable or adapter is required. In some cases, a gender
adapter is also required.
1.
Verify that the DIP switches reflect the desired settings.
In most cases the Factory Default settings will suffice,
refer to paragraph 3—2.1.
Enter RCOMM and verify the settings. Select the
Serial Interface: COM port I or 2 (Alt»I, 1 or 2). Then
examine the serial line parameters at the bottom of the
screen or window. If using the recommended Factory
Default settings on the transmitter, use the following
RCOMM settings:
Baud Rate = 38,400
Line Parameters = S Bits, lStop, No parity
Address = 0
Flow Control = Disable RTS/CTS flow control
Temtination = 
STX Count = ISTX in Preamble
g, ADR Count = SADR in Preamble
rapport.“
If any parameters need to be changed, access the
Configuration/Serial menu (Ale, S) and the parameter
to be changed.
Verify communications with the transmitter by typing
ID? and Return. You should see an ASCII message
identifying the unit as an MTC»100T with a certain
control software version and date.
Turn power to the Mchtoor transmitter OFF.
Set DIP switch SI to the code for the program being
uploaded as follows:
- DSP program: SI-B ON, all others OFF
(Code : 1)
- Control program: 51-7, 81-8 = ON, all others OFF
(Code = 3)
Set DIP switch 52-1 to ON (Boot Program)
Power the unit on.
In RCOMM, select the File Upload function (Alt-F,
U) and enter the path and filename of the new software
in the space provided. Conclude with Enter, the file
upload begins, Upload progress will be shown in a
window in RCOMM.
3-2
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9. When file upload is complete. reset all DIP switches to
their operational positions, or if both programs are to
be Uploaded (ie. DSP and Control), repeat steps 4—8 for
the other program.
10. Cycle the power to the transmitter. Set RCOMM to the
transmitter’s operational address. Verify the uploads
using the ID‘.7 query for control software or IDD? for
the DSP software
NOTE
When operating in the boot program, data is
transmitted in Xmodem format without the
formatting shown in figure 3-2. No STX or
address characters should be sent. This is all
handled by RCOMM automatically. The
function of S1, the address switch on the rear
panel, is changed to allow selection of the
firmware program (Control or DSP) that is to
be uploaded. Because no address information
is sent, a system that is setup to use bus sharing
where multiple units are connected to one
controller, only one unit may be operath in the
boot program at a time. Other units should be
powered down or disconnected from the bus.
The boot program may be entered either by
setting the rear panel DIP switch S2—I to ON
and cycling the power off and on, or by way of
software command GB. When using the
software command to select the boot program,
a useful shortcut is to select a device address
that agrees with the program select code that is
used to upload the program in question. This
allows switching from the main program to the
boot program uploading the new program, and
reenter—mg the main program, all with no need
to change the DIP switch settings or power
cycle the unit. For example, when uploading
the main program, use address 3 to
communicate with the main program. This is
the same number used to select main program
upload. Then use the GB command to switch
to the boot program, upload the control
program, When uploading is complete the
rmin program will be re—entered, and
communication can continue to address 3.
32.3 Serial Bus Description.
The serial interface includes the unbalanced (RS—232) line
interface, DIP switch #32-2 at the rear of the transmitter
must be set to OFF, see figure 3—l.
Issue 1.0
©CUBIC-CDMMUNICATIQNS
A mama-«m cum comm mm Moonwalk;
3»2.4 Serial Bus Message Format.
All transmissions. in either direction, conform to the
message format shown in figure 3-2. All transmitted and
received characters will be encoded and interpreted as
conforming to the ASCII character code.
Each character in the message is passed in an asynchronous
serial format as shown in figure 3-3. The number of data
bits, number of stop bits, parity options and baud rate are
all selectable from the rear panel DIP switches.
325 Serial Bus Message Types.
All messages are divided into two major categories:
command messages and status messages. Each category is
discussed in the following paragraphs:
3-2.5tl Serial Bus Command Messages. Command
messages are sent from the controller to the unnsmitter and
are subdivided into two classes as follows:
3-2.5.l.] Serial Bu: Radio Command Messages. Radio
command messages tables 3-3 through 3-7. contain
commands that are passed to the transmitter. They may
command the transmitter to change operational parameters
or to report back operational status.
Issue 1.0
MTC-1OOT TECHNICAL MANUAL
3-25.12 Serial Bus ln/enface Command Messages.
Interface command messages. table 3-1, contain commands
that are acted upon by the communications interface in the
transmitter. These commands cause the interface to change
modes or report status.
3-2.5.2 SerialBu: 5mm: Messages. Status messages are
sent from the transmitter to the controller and are
subdivided into two classes as follows:
3—25.21 Serial Bus Radio Slam: Messages. Radio status
messages. tables 3—3 through 3-7 contain information about
the operational status of the transmitter. "these messages
are sent as a reply to radio conunand messages that request
a status report.
3~2.5,2.2 Sen'al Bu: lmedacz Status Messages. Interface
status messages, table 3~2, contain error status infon-nation
caused by a previous command message or other source.
When the transmitter is in the acknowledge mode, it will
respond to all command messages with an interface status
message unless the command explicitly requested a status
message. 4
If more than one (I) error has occurred, only the highest
priority (most important) Interface Status Message will
display, The Interface Status Messages listed in table 3»2
are listed in highest priority (most important) to lowest
priority (least important)
3-3
MTC-1OOT TECHNICAL MANUAL © CUBIC. CD MMUN ICATI DNS
NOTES:
NOTE:
34
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|STxl1 2 3|F 1 5 0 0 0 0 S? P w R 10 |CR]
|~~V|7AdreiffData Fielde/ ———————————— |——i
/ / \
Start ASCII Carriage
of Text Space Character Return
The first character of a transmission will always be STX (start of text, ASCII code 02).
The second, third, and fourth characters will contain the address in decimal, with the most significant digit first, of
the transmitter sending the transmission or to which it is being sent by the controller. The address code for any
transmitter may be any number from 000 to 254 provided that it is not used by any other unit connected to the bus.
Address 155 is reserved for "broadcasting" to all transmitters on the bus (refer to paragraph 3.2.8), The controller
has no address All three digits must be transmitted, The address is set from the rear panel DIP switch 81.
The fifth character of the transmission is the beginning of the data field. This field may contain as few as one or as
many as 250 characters. The data field may contain one or more messages If more than one message is contained
in the data field, each message must be separated from the next by one or more blank (space) characters.
Any number of messages may be included in the data field provided that the maximum number of characters is not
exceeded. Only one request for a status command may be sent in each transmission with the following exceptions:
F? , IS? , T? , and PS? can be requested in the same transmission. The reply transmission will contain each
of the requested status messages in the same order that they appear in the R? command,
The final character of the transmission will be a CR (carriage return), This character will follow the last character
of the data field.
The transmission above from the controller is addressed to the transmitter with address 123 and contains two
messages: "FlSDOOO" and "PWRIO".
When sending messages to the transmitter that require numeric values as arguments, it is not necessary to include
leading zeros. For example, to send a message to change the transmit deviation to 6 kHz, the command message
”DEVGO" may be given in place of "DEV060". When a request for a status message is made, the reply will always
include any leading zeros so that the value may be extracted by counting characters in the message.
Figure 3-2 Serial Bus Message Format.
|ST|D1 D2 D3 D4 D5 D6 D7 (D8)|(P)|s|
| | I I |
|——| ———————— Data Bits ———————— |——»|—|
/ / \
Start Parity Stop
Bi t B i t Bi t
Information is passed in full duplex as characters in an asynchronous serial format. Each character consists of a start
bit, 7 or 8 data hits with the least significant bit sent first, an optional parity bit which provides even parity, and one
stop bit. The serial transmission rate may be set to each of the following standard rates. 75, l 10, 150, 300, 600, 1200,
2400, 4800, 9600, 19200, 38400, and 125000 bits per second. Line parameter options and baud rate are all set Via
hardware configuration, Two line parameter choices are available-
- 7 bits, even parity, i stop bit
- 8 hits, no parity, 1 stop bit
Refer to section 3—21,
Figure 3-3 Serial Bus Character Formal.
Issue 1.0
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3-26 Serial Bus Message Protocol.
The interface system operates in one of two modes:
NORMAL or ACKNOWLEDGE. These modes, table 3-1,
are selected by sending the transmitter the appropriate
interface command message. At power up, the interface
mode is set to NORMAL by default. At power up the
interface mode is set to NORMAL by default. Both modes
are discussed in the following paragraphs:
3-2.6.l Serial Bus Normal Made. In Normal Mode the
transmitter unit will process messages that are addressed to
it but no response will be sent back unless the Command
Message was a request for Status Message (Radio or Inter-
face}. The controller can verify that its Command
Message(s) was received without error by sending a
Command Message requesting a reply Status Message
either immediately after sending the original Command
Message, or after having sent Command Messages to other
transmitter units. This mode allows the fastest throughput
of commands to a large group of transmitters because the
controller does not have to wait for each transmitter unit to
process the message(s) before moving on to the next
transmitter unit.
3-2.6.2 Serial Bus Acknowledge Mode. In Acknowledge
Mode a transmitter unit will always respond to Command
Messages with a Status Message after it has processed the
Command Message. If the Command Message was for a
reply Radio Status Message, and no errors or faults have
been detected, the reply will be the requested Status
Message. In all other cases, the transmitter unit will
respond with an Interface Status Message. This mode
reduces maximum throughput because the controller must
wait for the reply Status Message before issuing another
command, but it simplifies the controller's job when it
wants to verify the reception of its Conunand Messages
and maximum throughput is not needed.
3-27 Line Driver Ogeratiun.
When bus Sharing is enabled through the transmitter's DIP
switch 82. that transmitter's Transmitted Data and Request
to Send line drivers are maintained in a high impedance
state at all times except when it is required for that unit to
transmit. In Normal Mode operation, this only occurs when
the unit has received a Command Message that requests a
reply Status Message. In Acknowledge Mode, all
conunands will caused the addressed unit to transmit.
The line drivers will be turned on and placed into the mark
state for at least one full character time before the first
character (the STX) is transmitted.
Issue 1.0
MTC-100T TECHNICAL MANUAL
3-23 Broadcast Address.
All transmitters will respond to address 255 the same as
their actual configured address. This is referred to as the
broadcast address. Ifa single transmission is sent to this
address, each transmitter on the bus will respond to the
commands in the transmission as if they were sent to it
individually. This feature may be used to cause a group of
transmitters to act in unison, or to reduce the time it takes
to initialize a group of transmitters to a set of conunon
parameters.
The broadcast address must not be used to request status
from a group of transmitters or when the transmitters are
operating in the acknowledge mode, since this would cause
bus contention as all transmitters would reply at the same
time. With only one transmitter on the bus it is possible for
the controller to detennlne the unit’s address by sending a
status request to the broadcast address and examining the
address field in the reply, since the reply message contains
the unit's configured address. This can be used during
system integration as a troubleshooting aid.
3-29 Serial Bus Message Definition. ‘
All messages are ASCII encoded and inserted into the data
field of transmissions as defined in paragraph 372,11.
Messages from the controller may use lower or upper case
for all alphabetic characters. The transmitter always uses
upper case,
Each message that can be sent using the bus controller is
listed in the following tables:
- Table 3-1, Serial Bus Interface Command Messages.
(Refer to para 3-25.12 & 3-16)
0 Table 3—2. Serial Bus Interface Status Messages
(Refer to para 3-25.22)
- Table 3-3. Primary Operational Commands.
Commands frequently used to change the
fundamental parameters of the transmitter.
- Table 3-4 Secondary Operational Commands.
Commands occasionally used to change the
fundamental parameters of the transmitter
° Table 3-5 Utility Commands.
Commands used to set nonropcrational
parameters.
- Table 3—6 Measurement Request Commands.
Commands used to request measurement
repons on specific transmitter parameters.
- Table 3~7 Built In Test and Diagnostics.
Commands used to verify performance and
identify faults.
Most Radio Status Messages use the same format as the
Radio Command Message for that parameter. For
3-5
MTC-1OOT TECHNICAL MANUAL
example, the reply to the Radio Command Message "F?"
(request current frequency selling) is "annnnnnn" in the
same format as the Radio Command Message to change the
Frequency.
All Radio Status Messages, except C?, are made up of
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counting the characters of the Status Message. Messages
which retum a numeric value will be padded with zeros on
the left to give the same number of characters as the same
message with the maximum value, When more than one
parameter is being reported, the individual parameters are
separated by a blank (space) character.
fixed length strings so that values may be parsed by
Table 3-1 Serial Bus Interface Command Messa es.
Message Definition
NORM Set NORMAL interface mode, The transmitter will not send a reply message unless a command is
sent that explicitly request a reply. This is the default interface mode.
Sol ACKNOWLEDGE interface mode. The transmitter will send a reply message in response to
every command, If the command does not request a reply, the transmitter will send the Interface
Status reply message as if : ? was sent
Request Interface Status Reply Message.
Reports information about errors detected by the remote control interface or other sections of the
MTCJOOT, If an error is detected, the replies will be as listed in table 32
Table 3-2 Serial Bus Inter/ace Status Messa -es.
Line error, serial port overrun error
Line error, serial port framing error
_ Line error. serial port parity error
Interface error. buffer overflow
Izzm Interface error, unknown command, or corru'nand not allowed
IE = IVAL Interface error - illegal argument value
Radio error — fault has been detected
No errors, interface in NORMAL Mode
No errorst interface in ACKNOWLEDGE Mode
3-6 Issue 10
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A “ms-mm- cum prwmm Mame-m.
Table 3-3 Primary Operational Commands.
Description
Syntax
Reply
E‘nnnnnn
Change Operating Frequency.
hmm'mnnn
Set the operating frequency. The first form Film is for frequency
in kHz, the second form annnnnnn is for frequency in 10 Hz units,
The first form may be used for frequencies that are an even number of
kiloherlz. Otherwise, the second form must be used. The range is
150000 to 174000 for the first form and 15000000 to 17400000 for the
second form, Frequencies must be a multiple of the basic step size,
currently 12.5 kHz (See the FF? command) The query command (F?)
always returns the long (8 digit) form.
Example:
1. Desired frequency = 157.675 MHz (25 kHz step size)
Using the 1“ form enter: F157675
Using the 2'"‘ form enter: F15767500
2. Desired frequency = 15716875 MHz (125 kHz step size)
Using the 1“ form enter: Not applicable. must use 2““_form.
Using the 2” form enter: F157 6875!)
Request the current frequency, The reply format is the same as for the
“Change Operating Frequency" above.
Turn transmitter flulpul on or off of the transmitter. 1
Where n is:
O = off
i: on
Request the current transmitter output status (on or off). The reply
format is the same as for Tn above.
Table 3-4 Secondary Operatlonal Cam/wands.
Description
Change Power Output.
Set the transmitter carrier output power level. nn is the desired power
level in units of] dBm. Range is 0 to 20 (l to 100mW).‘
Request the current transmitter output power level. The reply format is
the same for PWRnn above
Issue 1.0 3-7
MTC~100T TECHNICAL MANUAL © CUB lc. COMM” NICATIDNQ
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Table 3-4 Secondary Operational commands.
Description
Change Transmit Deviation.
Set the transmitter deviation. nnn is the desired peak deviation in
units of 100 Hz. Range is O to 50 (0 to 5.0 kHz)
Request the transmitter deviation status. The reply format is the same
for DEVnn above
Change Audio Input Source.
Set the source of modulation
Where n is:
0 or M: Microphone (not currently used)
1 or L: Line input connector
2 or T: Internally generated Tone 1
3 or N: Internally generated Noise source
4 or C: None (Unmodulated Carrier)
Request the transmitter Audio Input Source status. The reply format is
the same for Isn above, returns number style arguments.
Change Vector Feedback.
Set the on/off status of the vector feedback.
Where n is
O=off
1:0n
At power up vector feedback is turned off by default,
Note: When enabling the vector feedback or changing frequencies,
if the table of vector feedback constants contains zeros, the vector
feedback circuit is not actually enabled, although the response to the
VF? request will still be VFl . If the frequency is then changed to a
frequency for which the table does contain valid data, the circuit will
be enabled (if VF = 1),
Request the Vector Feedback status. The reply format is the same for
VFn above,
Request the frequency step size (tuning resolution), The return message
is FPnnnn where the nnnn is replaced with the step size in unit of 10
Hz. Current versions return FP1250 for 12.5 kHz steps, but this may
change in future versions.
3-8 Issue 10
©CUBIC¢GDMMUNICATIDN5 MTO-1DOT TECHNICAL MANUAL
A math-retina ease eon-mien lunlye'ewlpmke
Table 3-4 Secondary Operational Commands.
-yntax Reply Description
_m m. Tn pan
Variable responses
Request a report of the current values of selected operating parameters.
The parameters are: annnnnnn : frequency, ISn = input selection,
Tn = transmitter state, and FSn = fault status.
Request a report of parameters that have changed. Same as R? except
only contains items that have changed since the last time that parameter
was reported. If there have been no changes since the last report
(i.e. R?) then the response will be the same as if a :? were sent, (refer
to table 3-1), The reply format is variable.
Table 3-5 Utility Commands
Descriptlon
Go to boot program, The control processor immediately switches to
the boot program for uploading new control and DSP programs,
SPD This command reverts the power up default operating parameters, that
may have been saved into non»volatile memory, back to the factory
default settings: Factory default settings are as follows:
Frequency 170,000 MHZ
Input Selection Line Input (Isl)
This command saves the current operating parameters into nonvvolalile
memory as default parameters. Whenever power to the unit is switched
on, the operating parameters will be set to the values saved with the
last SPO command
The Current operating parameters are:
Frequency
Input Selection
Note: USAGE RESTRICTIONS
Based on the operational requirements placed on the unit, the user may
use the SPO command following every update to any of the above
parameters so that in the event of a power failure the unit will return to
the saved parameters when power is restored. However, if the unit‘s
parameters are changed more than a few times per day, the user may
wish to restrict the usage of thc SPO command to prevent damage to
the memory device. The lifetime usage of the SPO command is limited
to 100,000 writes. Therefore, the programmer should be careful when
using this command as part ofa program
Issue 1.0 3.9
MTC-100T TECHNICAL MANUAL
©cuBlC-CDMMUNlCATIDNS
A "um-mm. cw: com mm gimp-m:
Table 3-5 Utility Commands
Description
Change Frequency Tone
Set the frequency of the tone used for modulation when the Input
Selection is 132 (IST). nnnn is replaced with the tone frequency in
hertz. Range is 50 to 6000 Hz.
Request the frequency tone status. The reply format is the same for
TNnnnn above.
Change the Transmitter Timeout Value.
Set the transmitter timeout value. This sets the maximum number of
seconds that the transmitter may be left in the keyed state. If the
timeout is exceeded the transmitter will be unkeyed. After the timeout
has occurred. the unit must be unkeyed before it can be keyed again. If
nnnn is replaced with a value of 0, the transmit time is unlimited.
Range 0 to 1020 seconds (17 minutes). )
Request the transmitter timeout value. The reply format is the same to
TTnmm above.
Set the unit's serial number. This command may only be used if the
serial number is cleared to 00000 with EEPCLR
Request the unit's serial number. The format of the reply is the same a
for SERNOnnnnn command above.
cubic Communications
VHF Transmitter Vet
n.n.n m-dd-yyyy
Copyright my CCI
DSP firmware: Vex:
nn.nn m-dd-yyyy
3-10
This command clears all values stored in the non-Volaliic memory
(EEPROM) to default values. Values stored in the non-volatile
memory are the power-up operating parameters, and the serial number.
Request the unit's identification message. This message contains an
identification string, the control processor software version number
and date, and a copyright notice of the program.
The length of the reply message is variable. The version number's
three fields may consist of l, 2, or 3 digits.
Request the DSP processor software version number and date.
Issue 1.0
©CUBIC-GDMMUNIGATIONS MTC-100T TECHNICAL MANUAL
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Table 3-5 Utlllty Commands
Description
vrcAL Perform the vector feedback calibration routine and program the non—
volatile lookup table of vector feedback constants. Before performing
this command a dummy load must be connected to the antenna
connector. This command may take over 30 seconds to complete. The
unit will click for every frequency that it adds to the table. The
command is completed when the clicking stops, When this command
has completed, the vector feedback is turned on.
Note: This operation must be repeated after the power amplifier or any
RF cabling is changed,
This command is used for installation and maintenance of the
transmitter.
Perform the vector feedback calibration routine for only the current
operating frequency, and update the non-volatile lookup table, A
dummy load must be connected while performing this command.
Note: The current operating frequency must be set to a multiple of 25
kHz before pcrfomiing this command. If it is not, an illegal value error
will result
This command is used for installation and maintenance of the
transmitter‘
Program the non-volatile memory for the current frequency to the I
value or Q value in decimal given as tnnnnrt. The plus sign my be
omitted for values 2 O. This new value is not sent to the vector
feedback circuit immediately.
Report the I and Q vector feedback constants for the current frequency
Clear the non—volatile memory table of vector feedback constants to all
zeros, This prevents the vector feedback from operating on all
channels.
Note: The VFCAL command should be used to rebuild the table.
Table 3-6 Measurement Request Commands
Description
VPstnnn 1mm 1mm 2mm Request a report of the power supply output voltages in units of 0.l
volts, Nominal values are,
VPS+280 +175 +095 ~l75
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MTG-100T TECHNICAL MANUAL
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Table 3-7 Built In Test Diagnostics
Descrlption
Syntax Reply
FS ? FSn
FC? Fcnmnnnmnnnnnxum Request a report of all current faults The 16 n characters represent the
Request the summary status of all the fault detectors.
Where n is:
0 = No faults are detected (FSO)
_ Any of the 16 fault detectors indicates a fault (Fsl)
This is an abbreviated version of the FC? command.
current status of the fault conditions with each n replaced with a 1 to
indicate a fault conditions exists, or a 0 to indicate a fault condition doe
not exist, Starting with the first (left most) 11 character. the definition of
each fault bit is as follows:
Error interrupt has occurred
Not currently used
Not currently used
DSP clock fault
Transmit Synthesizer fault
No reply from US?
Timeout waiting for EEPROM data polling
Timeout waiting for serial bus transmitter to finish
Power supply voltage out of tolerance
10. Not currently used
11. Serial bus overrun error
12, Serial bus parity error
13, Serial bus framing error
14A Not currently used
15. Not currently used
16. Not currently used
wamowewwr
A11 bits except bit 1 will be cleared to 0 whenever the associated fault
condition goes away. Serial port faults are cleared when subsequent
serial data is received without the error condition, All bits of this
message may be cleared with the CFC command.
Example:
Hi? >
FCOOOOOOOIOOOZLOOOO
Indicates fault 8 (Timeout waiting for serial bus transmitter to finish)
and fault 12 (Serial bus parity error) have occurred.
FA? FAnnmmnnnnnnnnnnn Request a report of all accumulated faults. Once a fault condition has
occurred, it will be reported as 1 even though the fault condition may no
longer exist. The meaning of the 16 n characters is the same as for the
FC? command. All bits may be cleared to 0 with the CFA command.
Clear all current or accumulated fault status bits. This command clears
all of the bits of the FC? or FA? message to 0. Replace the n with C for
current faults or A for accumulated faults. If fault conditions persist,
they may be read as 1 when again read with the PC? or FA? command.
3-12
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©CUBlc-CQMMUNICATICINS MTC-100T TECHNICAL MANUAL
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Table 3-7 Built In Test Diagnostics
Description
Run the power-on self test (POST) manually. This test, which is run
automatically at poweron, checks various syslems in the control and
DSP processors for normal operation,
Request the results of the most recent poweron self test (POST)
sequence. Each of the n characters represents one of the tests
performed when the POST sequence is run and is replaced with a 1 to
indicate test passed, or a 0 to indicate test failed. Starting with the first
(left most) n character, the 5 tests are, from left to right:
ROM checksum test
RAM read/write test
DSP self test
Not currently used, (always reports 0)
Power Supply voltages limit test
inf-ME"?
Example:
PO? >
P011001
Indicates the DSP self test failed.
Report the results of the most recent DSP processor self test. The reply
format is DSnnnnnn where each n represents one test performed. A
test which was passed is shown as a 1 and a test that was failed is show
as a 0. Starting with the first (left most) 11 character, the 6 tests are.
from left to right:
1. Not currently used, (always repons 1)
2. Program ROM sumcheck
3. Not currently used, (always reports 1)
4, Not currently used, (always reports 1)
5. External RAM test
6. internal RAM test
Example:
DS? >
DSIlllOl
Indicates External RAM test failed"
Turns on or off the DAC (digitahtoaanalog convener) test. This test
produces a 1 kHz audio tone from the transmitter audio port, Replace n
with 1 to enable the DAC test. or 0 to disable the DAC test. While the
DAC test is enabled, the transmitter‘s normal operation is suspended
and the response to other commands (except DAC?) is unpredictable.
Requests the condition of the DAC test. 1 indicates the DAC test is on
and 0 indicates the DAC test is off.
Issue 1.0 3-13
MTC—100T TECHNICAL MANUAL
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Table 3-7 Built In Test Diagnostics
Description
PS?
Request a report of the in or out of tolerance status of each power
supply voltage. The reply formal is:
Psrmnnnnnn. The n characters in the reply message are grouped into
four pairs. Each rm pair represents the over and under status of one
voltage. The left it of each pair is a 1 if that voltage is above the
tolerance limit or a 0 if not. The right n of each pair is a 1 if that voltage
is below the tolerance limit or a 0 if not. Note that for a negative
voltage, above means too much negative voltage, and below nteans too
close to zero.
The MTC—IOOT may be configured with power supplies that have
different voltages and tolerance limits. Nominal power supply voltages
are:
+28. +175, +95, 7175
The four voltages for each type correspond from left to right with the bin
pairs in the reply message.
Example: _
If the reply to PS ? is PSO 1 00 U 01 0 it indicates that the +28 volt supp]
is too low, and that the —17.5 volt supply is too high (too much negative
3-3 POWER UP AND TESTING
CONSIDERATIONS.
Whenever power is applied to the transmitter it will
execute a Power On Self Test sequence. This sequence
tests several functions inside the transmitter including
memory tests, a confidence test of the configuration
options stored in non-volatile memory, and a DSP test.
When structuring a User Operating Program, it should send
the PO? command before entering NORMAL operation.
If any failures are indicated, the DS? and PS? commands
may be used to isolate the failure. After entering normal
operation the program may periodically send PS? to
3-14
voltage),
monitor the units Fault Status. If FS? returns Fsl, the
FC? and FA? command may be used to isolate the
problem. After extended periods of operation, the user
program can use the P0 command to re-run the Power On
Self Test.
NOTE:
In the event of a POST failure, the transmitter will emit
a sequence of failure codes in morse code. These codes
should be relayed to CCI in order to assist in
troubleshooting.
Issue 1 .0
©CUBICJ=DMMUNIGATION5
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MTG-1001" TECHNICAL MANUAL
CHAPTER 4
MAINTENANCE INSTRUCTIONS
Section I. PREVENTIVE MAINTENANCE
4-1 INTRODUCTION.
This chapter contains both preventive and corrective
operational level maintenance instructions, The informa—
tion includes cleaning and lubrication, inspection, perfor-
mance verification, and troubleshooting. If subassembly
removal and replacentent is required. refer to FO-3,
MTC—lOOT Interconnect Diagram for cable connections,
4-2 CLEANING AND LUBRICATION.
Clean the external surfaces, every 2 weeks using a vacuum
cleaner or small soft brush to remove any din or dust. Do
not use any cleaning agents. There are no lubrication
requirements.
4-3 INSPECTION.
If the unit is faulty or suspected to be faulty perform a
visual inspection as follows:
4-31 External Inspection,
Check front panel for physical damage.
Check external case for physical damage.
Check rear panel for physical damage.
Check rear panel connectors for corrosion and
loose connectors.
5. Check rear panel cables for frayed or broken
wires.
PPNZ“
4-32 Internal Inspection.
WARNING
With the rear pane power switch set OFF
and the power cord plugged into the power
source, high voltage shock danger is
present internally at the rear panel POWER
receptacle/RF] filter, AC Line Filter board,
and the rear panel circuit breaker.
When working on the transmitter with
covers removed and power applied, do
not allow tools or metal objects to come
in contact with transmitter components.
Equipment damage may occur.
Issue 1.0
Unit contains parts and assemblies
sensitive to damage by electrostatic
discharge (ESD), Use ESD
precautionary procedures when touching
removing or inserting parts,
1. Turn the unit off, and remove the power cord
from the power source.
2. Using a no. 2 Phillips screwdriver, remove cover
screws counter-clockwise, and remove the cover,
3. Check for loose connectors, corrosion, or bum
marks. '
4. Check for frayed or broken wires and cable
ribbons.
5. If any signs of internal damage exist, contact CC]
for disposition.
4-4 PERFORMANCE VERIFICATION.
The following sections describe in detail the procedures to
run the MTC»lOOT self verification tests.
4-4.1 External Connections.
1. Connect the power input to a suitable power
source. Leave the power switched off at this
time.
2. Connect a 50—ohm dummy load capable of
dissipating 1 watt continuously to the Antenna
jack.
3. Connect a serial COM] or COMZ port of a
DOS-based computer or a WindowsTM-based
computer running a DOS window to the
Maintenance port. In most instances a “Null
Modem" cable or adapter is required. In many
instances a gender adapter is required. Set the
transmitter’s rear panel DIP switches for the
desired communications parameters as
described in Chapter 3.
4-1
MTC-‘IOOT TECHNICAL MANUAL
4-2
4. Power on the transmitter.
5, On the computer, run the Cubic-fumished
program. RCOMM, and verify the settings.
RCOMM remembers the settings the last time it
was run. If running it for the first time, be sure to
select the Serial interface: COM port I or 2
(Alt-I, l or 2), Then examine the serial line
parameters at the bottom of the screen or
window. If using the recommended Factory
Default settings, insure the settings are:
Baud Rate = 38,400
Line Parameters = 8 Bits, IStop, No parity
Address = 0
Flow Control = Disable RTS/CTS flow
control
e. STX Count = tS'I'X In Preamble
ADR Count = 3 Address Digits in" Preamble
, Open the CONFIG menu:
Select Temrination’ = 
519.5?
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If any parameters need to be changed, access to
the 'C0nfigura|i0n' and 'Serial‘ menus can be
gained by using a mouse or pressing (Alt—C, S)
and using the arrow and ‘ENTER' keys to select
and change the parameter(s).
6. Verify communications with the transmitter by
4-42
typing ID? and Return. You should see an
ASCII message identifying the unit as an
MTCJOOT with a control software version and
date. If so, proceed to paragraph 4—42.
Transmitter Performance Verification.
Use the PO? query to obtain the results of the
Power On Self Test. Refer to Table 3-7 for the
meaning of the individual result hits. If desired,
use the PO command to repeat the tests.
Issue 1 .O
©CUBIC-COMMUNICATIONS
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MTC-100T TECHNICAL MANUAL
Section II. CORRECTIVE MAINTENANCE
46 TROUBLESHOOflNG.
4-51 Troubleshooting Philosophy,
Certain assumptions are made concerning the
troubleshooting approach as applied to the transmitter as
follows:
I. All point-to-point wiring is correct. Therefore. no
malfunction is the result of a wiring (or cable
connector) fault.
NOTE
Suspected failure of cables or
connectors require visual inspection and
continuity tests using the appropriate
diagram, See FO-3 for interconnecting,
schematic.
2. Malfunctions are non-interactive. Each symptom
of a problem is caused by a single malfunction
and no additional failures occurred during the
troubleshooting process.
3, Multiple faults can be isolated if they are
non-interactive.
4, Preventive maintenance has been performed
(Section 1),
4-52 Built-In Tests. The M‘IC-IOOT provides two
types of testing: power-on self test (POST), and built—in
test (BIT). Each is discussed below.
45.2.1 POST. The POST is performed automatically
each time the transmitter is powered on. Under firmware
control, the POST sequences through a series of tests that
checks the Control and DSP section of the Digital module.
If a failure is detected, the unit generates an audio tone in
morse code describing error. Record the failure data.
Depending on the failure, transmitter functions may or may
not be possible. POST results are also reported over the
remote control bus.
4-521 m During normal transmitter operation, fault
detectors are operating in the background. If a fault is
detected, the Control section stores the infomtation in
memory, causes the NO FAULT LED to extinguish . and
makes the fault information available over the remote
control bus. The operator can view the current or
cumulative faults (since power up) using the PC? or FA?
command.
Issue 1.0
4-53 Troubleshooting Procedure. Equipment
troubleshooting should be performed in the following
order:
1. Initial checks.
2. Fault identification
4—5.3,l Initial Checks. If a problem is suspected conduct
the following: ‘
1. Check that the power switch is on and the Power
and No Fault LED's on the front panel are
lighted. If the Power and No Fault LED's are off ,
and the power switch is set to on, ensure that
input power is correct.
2, Check for air flow into the unit from the front
panel. The interior fans draw air through the grill
on the front panel to the eihaust slits on the rear
panel.
4-531 Fault Identification. Should the transmitter
identify a fault, the “No Fault" LED on the front panel of
the transmitter will extinguish. Since the transmitter is
designed to be operated remotely verification of the “No
Fault" LED may not be a viable option. If a malfunction
is suspected several radio command messages are available
to help localize and determine the cause of the problem.
These command messages are:
:? Request Interface Status Messages.
DACn Initiate DAC test.
DS? Request a report of the DSP self test
FA? Request a report of all accumulatedfaults.
FC'.7 Request a report of all current faults.
FS? Request a fault summary report.
PO? Request results of the most recent POST,
PS7 Request status of the power supply
voltages.
VPS? Displays the current power supply voltages.
A more detailed description of these commands is provided
in chapter 3.
NOTE
When using the FA? or PC? Radio Commands
the operator can determine the fault from table
3-7. To detennine the meaning and the
maintenance action to take in response to these
fault messages, refer to table 41.
4—3
MTC-100T TECHNICAL MANUAL
Error interrupt has occurred
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Table 4-1 Fault Messa es.
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Divide by zero or other software
error has occurred. May indicate
a software problem.
If condition recurs, report to CCI factory
engineers.
Use a? query to identify all operation conditions
at time of error,
DSP clock fault
Transmit Synthesizer fault
No reply from DSP
Phase Lock Loop (PLL)
malfunctioning.
Phase Lock Loop (PLL)
malfunctioning.
Digital Signal Processor or DSP
Clock malfunctioning
Recycle power.
If problem persists or recurs, replace RF
Analog board.
Recycle power.
If problem persists or recurs, replace RF
Analog board.
Recycle Power,
if problem persists or recurs, check
49.152 MHz DSP clock: ‘
a. If bad, replace RF Analog board.
b. If good, replace Digital board.‘
Timeout waiting for
EEPROM data poling
Timeout waiting for serial
bus transmitter to finish.
Power supply voltages out of
tolerance
Serial bus overrun error
Serial bus parity error
Serial bus framing error
EEPROM does not accept
programming.
EEPROM faulty.
Replace Digital board.
The serial port has timed out
while transmitting
Hardware handshake has
prevented timely transmission of
a message from the transmitter
One or more of the DC voltages
(+28. +175. +9.5. -17.5) is at
fault.
Character received too fast for
transmitter to process.
Character received with incorrect
parity.
Character received without
required stop bit
Check handshake lines.
Check host software.
Try different baud rate.
Replace Digital hoard
Replace power supply module.
If only the +28 VDC is at fault. replace the
DC/DC Convener.
Verify that host respccts RTS handshake.
Reduce baud rate.
Check line parameter settings.
Choose host line settings.
Choose no-parity mode of transmission
Check bus capable and connectors for bad
connections or noise pickup.
Check transmitter line parameter settings.
Check host line parameter settings for
match.
4-4
Issue 1.0
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4-6 SOFTWARE UPLOADING.
The transmiuer's control and DSP software may be
replaced using the Maintenamce connector 17. on the rear of
the unit to gain access tn the unit's flash memory The
upload my be done using a DOS-based personal computer
erh a serial bus null-modem cable and one of the COMM
ports on the PC.
To upload software to the transmitter control and DSP
processors, refer to section 3-22 of the manualr
Issue 1.0
MTC-100T TECHNICAL MANUAL
4-5!(4—6 blank)
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MTG-1 DOT TECHNICAL MANUAL
CHAPTER 5
PREPARATION FOR RESHIPMENT
5-1 INTRODUCTION.
This chapter contains information to prepare the unit for
reshipment including disassembly and removal from the
rack mount, packaging, and shipping.
5-2 DISASSEMBLY AND REMOVAL.
To disassemble and remove the unit from the rack mount,
perform the following procedures:
1. Ensure the power is set to off,
2. Disconnect the input power cable.
3. Disconnect all cables from the rear panel.
4. Remove the unit from the rack mount it used.
5-3 PACKAGING.
NOTE
The unit should be packed in the
original shipping container if available.
To package the unit for reshipment perform the following
steps:
1, Ensure that there is sufficient foam packing
material in the shipping container to protect the
unit from any hard impact.
Issue 1.0
2. Cover the unit with foam or bubble—type packing
material.
3 Place the unit in the center of the shipping
container.
4. If using a cardboard packing carton, securely tape
the seams of the carton‘s top cover, bottom cover,
and side flaps with reinforced packing tape.
5. Attach labels or stamp in indelible ink the word
FRAGHJE on the top, bottom and all sides of the
container.
5-4 SHIPPING.
Unit contains parts and' assemblies
sensitive to damage by electrostatic
discharge (ESD). Do not ship or store
near strong electrostatic, electromag-
netic, magnetic or radioactive fields.
There are no special shipping requirements for the unit.
Commercial or rm'Iitary surface or air shipping services
may be used.
5-1/(5-2 blank)
®CUBIC. COMMUNICATIONS MTC—1OOT TECHNICAL MANUAL
A mums». Cum Cow-nun lumflyduwlpmkl
CHAPTER 6
STORAGE
6-1 INTRODUCTION.
This chapter contains information for storage of the Unit contains parts and assemblies
equipment including environmental conditions and any sensirive to damage by electrostatic
special preservation requirements. discharge (BSD). Do not ship or store
near strong electrostatic, electromag-
6-2 STORAGE ENVIRONMENT. netic, magnetic or radioactive fields,
The transmitter should be stored indoors in the original
shipping container (or similar container) as described in 6-3 PRESERVATION.
chapter 5. The humidity should be belween 40 and 90%
(non-condensing) with a temperature range of —20 to
60°C There are no special coverings or preservation materials
+ .
required to store the transmitter.
Issue 1.0 6-1/(6-2 blank)
©CUEIC-CDMMUNICATIDN5 MTO-100T TECHNICAL MANUAL
CHAPTER 7
PARTS LIST
7-1 INTRODUCTION. 7-2 REPLACEABLE PARTS LISTING.
This chapter conning me pans 139 for replaccable modules Table 7-1 lists replaceable modules and chassis-muumcd
and chassisqnoumed components a! the operational components for the Ufli‘» (See figure F0‘4 for IOCEIIOHSJ
maintenance level.
Table 7-1 Re-laceable Parts.
Number
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