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

Harris Corporation RF Communications Division Multimode data transceiver in PDF format

user manual in PDF format

PUBLICATION NUMBER: 10515-0152-4300JUNE 2000Rev. 02Air Traffic Control Communicationsnext level solutionsMX-9325TRANSCEIVERINTERMEDIATE MAINTENANCEMANUALThe 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 WARRANTYHARRIS CORPORATION (RF COMMUNICATIONS DIVISION)FROM HARRIS TO YOU – This warranty is extended to the original buyer and applies to all Harris Corporation, RFCommunications Division equipment purchased and employed for the service normally intended, except those productsspecifically excluded.WHAT WE WILL DO – If your Harris Corporation, RF Communications Division equipment purchased from us for use outside theUnited States fails in normal use because of a defect in workmanship or materials within one year from the date of shipment, wewill repair or replace (at our option) the equipment or part without charge to you, at our factory. If the product was purchased foruse in the United States, we will repair or replace (at our option) the equipment or part without charge to you at our Authorized RepairCenter or factory.WHAT YOU MUST DO – You must notify us promptly of a defect within one year from date of shipment. Assuming that Harrisconcurs 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 returnof the defective equipment or part to our factory in Rochester, NY, U.S.A., for repair or replacement. You must prepayall transportation, insurance, duty and customs charges. We will pay for return to you of the repaired/replaced equipmentor 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, properlypack, insure, prepay the shipping charges and ship the defective equipment or part to our factory or to the AuthorizedWarranty Repair Center indicated by us.Harris Corporation Telephone: (716) 244-5830RF Communications Division Fax: 716-242-4755Customer Service http://www.harris.com1680 University AvenueRochester, NY 14610, U.S.A.Harris will repair or replace the defective equipment or part and pay for its return to you, provided the repair or replacement is dueto 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 totransportation, non-Harris repair or service costs, downtime costs, costs for substituting equipment or loss of anticipatedprofits 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. ALLEXPRESS OR IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY AREEXCLUDED.SERVICE WARRANTY – Any repair service performed by Harris under this limited warranty is warranted to be free from defectsin material or workmanship for sixty days from date of repair. All terms and exclusions of this limited warranty apply to the servicewarranty.IMPORTANT – Customers who purchased equipment for use in the United States must obtain a Return Authorization Numberbefore shipping the defective equipment to us. Failure to obtain a Return Authorization Number before shipment may result in adelay 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 ServiceDepartment.
PUBLICATION NUMBER: 10515-0152-4300JUNE 2000Rev. 02HARRIS CORPORATION RF COMMUNICATIONS DIVISION1680 University Avenue Rochester, New York 14610-1887 USA Tel: 716-244-5830. Fax: 716-242-4755. http://www.harris.comMX-9325TRANSCEIVERThe material contained herein is subject to U.S. export approval. No export orre-export is permitted without written approval from the U.S. Government.Information and descriptions contained herein are the property of Harris Corporation. Such informationand descriptions may not be copied or reproduced by any means, or disseminated or distributed withoutthe express prior written permission of Harris Corporation, RF Communications Division, 1680 UniversityAvenue, Rochester, New York 14610-1887.Copyright  2000By Harris CorporationAll Rights ReservedFirmware Release: rev. TBD
MX-9325iiFor 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.When an Adult Stops BreathingDoes the PersonRespond?Tap or gently shakevictim.Shout, “Are you OK?”1Roll PersonOnto BackRoll victim toward youby pulling slowly.3Open AirwayTilt head back and liftchin.4Give 2 FullBreathsKeep head tilted back.Pinch nose shut.Seal your lips tightaround victim’s mouth.Give 2 full breaths for1 to 1-1/2 seconds each.6Check for Pulseat Side of NeckFeel for pulse for5 to 10 seconds.7Begin RescueBreathingKeep head tilted back.Lift chin.Pinch nose shut.Give 1 full breathevery 5 seconds.Look, listen, and feel forbreathing between breaths.9Shout, “Help!”Call people who canphone for help.2Check forBreathingLook, listen, and feelfor breathing for3 to 5 seconds.5Phone for HelpSend someone to callan ambulance.8Recheck PulseEvery MinuteKeep head tilted back.Feel for pulse for5 to 10 seconds.If victim has pulse but isnot breathing, continuerescue breathing. If nopulse, begin CPR.10WARNINGDO NOT attempt to perform the rescue breathing techniques providedon this page, unless certified. Performance of these techniques byuncertified personnel could result in further injury or death to the victim.
MX-9325SAFETY SUMMARYxiSAFETY SUMMARY1. INTRODUCTIONAll operators and maintenance personnel must observe the following safety precautions during operation andmaintenance of this equipment. Specific warnings and cautions are provided in the manual and at the end of thisSafety Summary. Warnings, Cautions, and Notes appear before various steps in the manual and will be used asfollows:•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 emphasis2. PERSONNEL AND EQUIPMENT SAFETYBasic 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 electronicequipment. The following are types of hazards that may exist:ELECTRICAL –Hazardous voltage and current levels may exist throughout the equipment. Contactwith these hazards could cause electrocution, electrical shock, burns, or injury due toinvoluntary reflexes of the body.MECHANICAL –Mechanical hazards are created when heavy assemblies and components must beremoved and replaced. Moving parts (such as fan blades) and hot surfaces arepotential mechanical hazards.THERMAL –Burn hazards may exist in the equipment that could cause personal injuries and/orserious equipment damage. Internal surfaces of the equipment may be in excess of65°C, the point at which personnel could be burned. Extreme caution should be usedwhen working with any hot assemblies (for example, power supply or power amplifierassemblies). Physical injury or damage may result to personnel and/or equipment as aresult of a reflex action to a burn.CHEMICAL –Chemicals or materials used for servicing the equipment may present potentialhazards. 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 frequenciesthat may produce a health hazard.
MX-9325SAFETY SUMMARYxii3. OPERATIONAL AND MAINTENANCE SAFETY GUIDELINESGood safety discipline is critical to prevent injury to personnel. All other safety measures are useless if personneldo not observe the safety precautions and do not follow safety disciplines. Once aware of a hazard, personnelshould 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 asafe manner.b. Prior to applying equipment power after maintenance, personnel must ensure that all unsecured handtools 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 informationabout 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 hasbeen removed. When immediate removal of the power is not possible, personnel must use anon-conductive material to try to jolt or pry the body away from the point of shock.f. Personnel should work with one hand whenever possible to prevent electrical current from passingthrough vital organs of the body. In addition, personnel must never work alone. Someone must beavailable 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 capacitorwill explode when power is applied. Extreme care must be used when replacing and connecting thesecapacitors. The capacitor terminals must always be connected using the correct polarity: positive topositive and negative to negative.
MX-9325SAFETY SUMMARYxiiiThe 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 andapply these precautions during the many phases of operation and maintenance of the equipment. The followingprecautions must be observed:DO NOT SERVICE EQUIPMENT ALONENever work on electrical equipment unless another person familiar with the operation and hazards of theequipment is near. When the maintenance technician is aided by operators, ensure that operators are aware ofthe hazards.GROUNDINGAlways ensure that all equipment and assemblies are properly grounded when operating or servicing.TURN OFF POWER AND GROUND CAPACITORSWhenever possible, power to equipment should be turned off before beginning work on the equipment. Besure to ground all capacitors that are potentially dangerous.KEEP AWAY FROM LIVE CIRCUITSOperators and maintainers must observe all safety regulations at all times. Do not change components ormake adjustments inside equipment with a high voltage supply on unless required by the procedure. Undercertain conditions, dangerous potentials may exist in circuits with power controls off, due to charges retainedby capacitors.DO NOT BYPASS INTERLOCKSDo not bypass any interlocks unnecessarily. If it is necessary to employ an interlock bypass for equipmentservicing, use extreme care not to come in contact with hazardous voltages.USE CARE HANDLING HEAVY EQUIPMENTNever attempt to lift large assemblies or equipment without knowing their weight. Use enough personnel or amechanical lifting device to properly handle the item without causing personal injury.HEED WARNINGS AND CAUTIONSSpecific 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 EYEWEARAll personnel must wear protective eyewear when servicing or maintaining equipment. Protective eyewearmust be worn at all times when using tools.
MX-9325SAFETY SUMMARYxiv4. PROTECTION OF STATIC-SENSITIVE DEVICESDiode input-protection is provided on all CMOS devices. This protection is designed to guard against adverseelectrical conditions such as electrostatic discharge. Although most static-sensitive devices contain protectivecircuitry, several precautionary steps should be taken to avoid the application of potentially damagingvoltages 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 isconductive and should provide adequate protection for the device. Storing or transporting thesedevices 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 PWBscontaining 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 bythe 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 toolscan destroy these devices. SOLDERING GUNS MUST NEVER BE USED.5. EXPLANATION OF HAZARD SYMBOLSThe symbol of drops of a liquid onto a hand shows that the material will cause burns orirritation 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 yourlife or health.
MX-9325GENERAL INFORMATIONMX-9325TRANSCEIVER
MX-9325GENERAL INFORMATIONFigure 1-1. MX-9325 Transceiver9325-001
MX-9325GENERAL INFORMATION1-1CHAPTER 1GENERAL INFORMATION1.1 INTRODUCTIONThis manual provides the technician with all technical information required to support level III maintenance asdescribed in Appendix B.The overall intent of this manual is to help the technician expedite repair of the unit in a reasonable amount oftime, resulting in reduced down-time and increased system availability. Detailed information that is useful to thetechnician is provided: configuration, specifications, fault isolation, repair, tools, test equipment, and functionaldescriptions of the assemblies. A glossary of terms is also provided in Appendix A.1.2 WARRANTYFor warranty information refer to the inside front cover of this manual.NOTEContractual agreements may supersede standard warranty. Referto contract agreement for additional warranty information.1.3 GENERAL EQUIPMENT DESCRIPTION1.3.1 MX-9325 TransceiverFigure 1-1 shows the MX-9325 Transceiver.The MX-9325 Transceiver is a rack-mounted, fully programmable unit. The MX-9325 Transceiver operates as adouble sideband AM-MSK analog data Transceiver or as a D8PSK digital-data transceiver. The MX-9325Transceiver yields a 25-Watt power output that covers the frequency range of 118.000 to 136.975 MHz with 25kHz spacing between channels. All programmable features and functions are controlled via asynchronous serialport 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 thedemanding needs for ATC communications. This advanced MX-9325 Transceiver is designed to operate in twomodes. As a double sideband AM-MSK analog data transceiver, the MX-9325 Transceiver supports therequirements for a multiple-mode communications radio for ACARS utilizing an MSK modem integral to theradio providing all modulation/demodulation and CSMA for media access control. As a D8PSK digital-datatransceiver, 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 MOPSThe MX-9325 Transceiver is operated from a VHF Ground Computer (VGC) using ACARS software. For moreinformation on operations, refer to the VGC and ACARS Operations Manual. Locally the VGC interfaces to theMX-9325 Transceiver Host Port. Remote operations are controlled using a VGC with an optional VHF ExtenderUnit. Refer to Paragraph 1.3.2 for VHF Extender Unit description. The Extender Unit is also required for split siteconfiguration (MX-9325 Transceiver installed as a separate transmitter and receiver function). Remote control isvia an RS-422 electrical connection using a baud rate up to 192 k baud programmable from the VGC.
MX-9325GENERAL INFORMATION1-2The MX-9325 Transceiver maintains three non-volatile storage areas called Software Banks, to hold downloadedsoftware data. At any time, two of the banks are considered active and contain valid copies of the MX-9325Transceiver operating software. This enables the radio to execute the most recent downloaded version of itssoftware, or to switch to a previously downloaded version via instruction from the VGC. When a MX-9325transceiver is shipped from the factory, it contains identical versions of software in all software banks, althoughonly 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 isolatesfaults within the MX-9325 Transceiver to the assembly level. Faults are reported to the MX-9325 Transceiverfront panel fault LED. The fault code is diagnosed at a PC or ASCII terminal connected to the front panelmounted maintenance port or from the VGC using a BIT command. This feature helps to quickly test and repairthe transceiver. Within the MX-9325 Transceiver BIT, it continuously monitors power supply output, synthesizerlock 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 siteconfigurations.The VHF Extender Unit is rack mounted and consists of 14 plug-in card modules and two fused power supplies toaccommodate inputs of 115 or 230 Vac. The VHF Extender Unit is designed to interface signal or multipleTransceivers to the VGC and to an optional 4 by 4 antenna relay switch that automatically switches the VGC to areserved MX-9325 Transceiver during a disabling fault situation.Using the VHF Extender Unit, the receivers channel busy and the transmitter’s receiver mute differential signaloutput lines are extended to the remote site by means of a current loop interface circuit, capable of driving therequired maximum length of hard wire lines between sites. Refer to Chapter 3 for MX-9325 Transceiverconfiguration. 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 CardsThe VHF Extender Unit uses three types of plug-in module cards. The type and quantity depend on the MX-9325Transceiver system configuration. The following are the plug-in module card types and configuration when used:•EIA-530 Modem - A high speed, short range synchronous COTS data modem card. The EIA-530 Modemis required for each MX-9325 Transceiver to communicate in remote site configuration, quantity 14maximum. The EIA-530 Modem is utilized to extend the Host Port EIA-serial data interface between thelocal 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 DiscreteI/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. TheDiscrete I/O Card is utilized to extend the transmit mute and receiver channel busy signals between localand remote site MX-9325 Transceivers to support ACARS and Mode 2 operation. Each board has anEIA-422 signal level input and output (TX/RX) which is converted to and from differential 20 mA looplevels for transmission over the intersite lines.•RS-232 Modem - A low speed, short-range asynchronous COTS data modem card. Required for eachoptional 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 multipleTransceivers to a 4 by 4 antenna relay switch that automatically switches the VGC to a reservedMX-9325 Transceiver during a disabling fault situation.
MX-9325GENERAL INFORMATION1-3Refer to Table 1-2 for additional VHF Extender Unit configuration information.1.3.3 MX-9325 Transceiver Front PanelSee Figure 1-1. The MX-9325 Transceiver front panel provides serial connector for maintenance interface. Alsoprovided on the front panel, on/off switch, status indication LEDs, reference oscillator test connection and anaccessory connector.1.3.4 MX-9325 Transceiver Rear PanelRefer 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 PanelRefer to Chapter 8, Figure 8-3. The VHF Extender Unit rear panel provides 14 snap type terminal blocktransmission line connections, 14-dB 25 female data interface connections.
MX-9325GENERAL INFORMATION1-4Figure 1-2. VHF Extender Unit9325–002
MX-9325GENERAL INFORMATION1-51.3.6 MountingThe MX-9325 Transceiver and VHF extender unit are designed to be rack mounted. Refer to Chapter 6 andChapter 8 for installation information.1.3.7 MX-9325 MX-9325 Transceiver Configuration InformationTable 1-1 identifies the MX-9325 Transceiver configuration and part number described in this manual. Table 1-2identifies the VHF extender unit configurations and part numbers described in this manual. Refer to Chapter 7 forfamily tree. For firmware revision of this manual, refer to the title page that appears just after the warranty insidethe front cover.Table 1-1. MX-9325 Transceiver ConfigurationsProduct Description Part NumberMX-9325 VHF Multimode Transceiver 12007-1000-011.3.8 VHF Extender Unit Configuration InformationTable 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. Referto Chapter 7 for the family tree. For firmware revision of this manual, refer to the title page that appears just afterthe warranty inside the front cover.Table 1-2. VHS Extender Unit ConfigurationsPart Number VHF Extender Unit Configuration DescriptionQtyofEIA-530ModemSlotPositionin use byEIA-530ModemQty of I/O CardSlotPositionin use by I/O CardQty ofRS-232ModemSlotPositionin use byRS-232Modem12007-6000-001 Thru12007-6000-014Remote or Split Site 1 XCVR ThruRemote or Split Site 14 XCVR’s1thru141thru140Thru00Thru00Thru00Thru012007-6000-101 Thru12007-6000-10812007-6000-109 Thru12007-6000-112Remote Site 1 XCVR 1 Ant. Sw. ThruRemote Site 8 XCVR’s 1 Ant. Sw.Remote Site 9 XCVR’s 2 Ant. Sw. ThruRemote Site 12 XCVR’s 2 Ant. Sw.1thru89thru121thru89thru120Thru00Thru00Thru00Thru01Thru12Thru214Thru1413,14Thru13,1412007-6000-201 Thru12007-6000-207Split Site 1 XCVR ThruSplit Site 7 XCVR’s1thru71thru1,3,5,7,9,11,131Thru72Thru2,4,6,8,10,12,140Thru00Thru012007-6000-301 Thru12007-6000-306Split Site 1 XCVR 1 Ant. Sw. ThruSplit Site 6 XCVR’s 1 Ant. Sw.1thru61thru1,3,5,7,9,111Thru62Thru2,4,6,8,10,12,141Thru114Thru141.3.8.1 MX-9325 Transceiver Unit IdentificationMX-9325 Transceiver identification information is located on the front panel identification tag.
MX-9325GENERAL INFORMATION1-61.3.8.2 VHF Extender Unit IdentificationVHF Extender Unit Identification is located TBD.1.4 ADDITIONAL ITEMS SHIPPED WITH UNITThe MX-9325 Transceiver is shipped with an ancillary kit which is listed in Chapter 7, Paragraph 7.4.4.1.5 REFERENCE DOCUMENTSRefer 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 ShortRange 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 DataTerminal 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 EQUIPMENTTools and test equipment recommended for installing, troubleshooting, and repairing the MX-9325 Transceiverare listed in Chapter 7, Paragraph 7.3.1.7 SPECIFICATIONSRefer to Table 1-3 for MX-9325 Transceiver specifications.Table 1-3. MX-9325 Transceiver SpecificationsFunction SpecificationGENERALFrequency Range 118 MHz to 136.975 MHzFrequency Tolerance 1 PPM, –20C to +55C, aging 1 ppm per year maximumChannel Spacing 25 kHzTuning Time 100 ms from the receipt of the last bit of the frequency change command.Receive to Transmit Turnaround 1 ms after terminating the receive functionTransmit to Receive Turnaround 1 ms after terminating the final informationEMI/EMC Approvals BZT, CE OFCOM and U.S. FCC Class B OperationSafety Agency Approvals CSA, UL, BSIBIT DC power supplies, PA temperature, synthesizer lock, receiver sensitivityData Interface 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 connectorModes AM-MSK : Per ARINC Specification 618-2Mode 2: Per ICAO Annex 10Mode 3: Per RTCA SC-172 WG3 MOPS
MX-9325GENERAL INFORMATION1-7Table 1-3. MX-9325 Transceiver Specifications – ContinuedFunction SpecificationChannel Statistics SNR,RSSI, Pre-key value, message duration, cumulative receive time,cumulative standby time.TRANSMITTEROutput Power MSK: 25 Watts adjustable from 5 to 25 Watts via maintenance portD8PSK: 25 Watts averageVSWR No degradation for up to 2:1; no damage from infinite VSWRDuty Cycle 50% ContinuousHarmonic and Spurious Emissions - 80 dBc minimum for all modesAdjacent Channel Power and Wide-band Noise MSK: -70 dBc minimum;D8PSK: Per ICAO Annex 10Transmitter Time-out Time 5 to 60 seconds, adjustableTransmitter Keying Via maintenance port for installation setup and testRF Power Rise time Less that 190 µs (two symbols)RF Power Release Time Within 190 µs after transmitting the final information symbolData Rate MSK: 2400 bpsD8PSK: 31.5 kilobits per second ± 0.005%Transmitter Pre-key 0 to 190 msec, adjustment via maintenance port 85 msec defaultTransmitter Phase and AmplitudeBalance D8PSK: 90±3 degrees phase, and ± 1 dB amplitude maximumTransit Delay MSK: 10 mS maximumFrequency Response MSK: 200 Hz to 3600 Hz ± 2 dBDifferential Phase Delay MSK: 20 µSAudio Distortion MSK: 5%Modulation Level MSK: adjustable 30 to 95% via maintenance portInternal Test Signals MSK: 1200 or 2400 Hz individual; random sequence of 1200 Hz and2400 Hz; 1 kHzD8PSK: CW carrier, continuous random dataDigital Interface, Data (J3) RS-232 or RS-422RECEIVERSensitivity MSK: - 99 dBm for 10 dB SINAD, 30% AM with 1 kHz modulationsignal;D8PSK: - 103 dBm for 10– uncorrected BERIF Selectivity - 6 dB at ± 10kHz; - 80 dB at ± 25 kHzAdjacent Channel Rejection 44 dB minimum for 10– uncorrected BER (per EUROCAE MOPS)Spurious Radiation 80 dB minimumRejection of Signals in the VHFBand For -3 dBm interferer (Fi) removed from desired 450 ≤ (Fi) ≤ 2000kHz, less than 3 dB SINAD degradation;For 0 dB interferer (Fi) removed from desired Fi ≤2 MHz, less that 3 dB SINAD degradationRejection of Signals outside theVHF Band For signal interferer 0 dB or less within FM broadcast band, no SINADdegradation.In-Band Signal Rejection 70 dB minimum for interfering signals spaced greater that 100 kHzfrom desired.FM Broadcast Intermodulation For two interfering signals 0 dB or less within FM broadcast band, noSINAD degradation.
MX-9325GENERAL INFORMATION1-8Table 1-3. MX-9325 Transceiver Specifications – ContinuedFunction SpecificationNoise Rejection For -157 dBm/Hz AWG noise input and -95 dBm desired, 10– uncorrected BER minimumDesired Signal Dynamic Range + 10 to – 103 dBm for 10– corrected BERSymbol Rate Capture Range 60 parts per million minimum for 10– uncorrected BERFrequency Capture Range ± 965 Hz minimum for 10– uncorrected BERDoppler Rate ±18 Hz/s minimum for 10– uncorrected BER within ± 140 Hz Dopplershift rangeCo-Channel Interference –20 dB for 10– uncorrected BERConducted Spurious Emission –64 dBm maximum 50 kHz to 1215 MHzCross Modulation 60 dB for interferer (Fi) removed from desired 25 ≤ Fi ≤1000 kHz80 dB for interferer (Fi) removed from desired Fi > 1 MHzTransit Delay MSK: 10 ms maximumAGC Attack Time MSK: 7.5 ms maximumAGC Release Time MSK: 7.5 ms maximumSquelch Disable Internal, via maintenance portLoudspeaker External, handset via maintenance port jackReceiver Mute internal, via maintenance portSignal Quality Output (RSSI) Reported to GSC via ACARS message formatMaximum RF Input 5 Vrms minimum without damageAS Power Requirements 87 to 265 Vac 47 Hz – 63 HzPOWERDC Power Requirements NoneInput Power Consumption 250 WattsENVIRONMENTALOperating Temperature –20C to +55CHumidity Up to 95% Non-CondensingStorage Temperature –40C to + 70CAltitude 10,000 ftRELIABILITY/MAINTAINABILITYSelf Test BITEMTBF >50,000 HoursMTTR <15 MinutesMECHANICALSize 5.25 H x 18.5 L x 19.0 W inches(13.36 H x 45.72 D x 48.26 W centimeters)Weight 35 lbs(15.4 kg)Table 1-4. VHF Extender Unit SpecificationsFunction SpecificationOEM CHASSIS ASSEMBLYPhysical Dimensions 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-9325GENERAL INFORMATION1-9Table 1-4. VHF Extender Unit Specifications – ContinuedFunction SpecificationCapacity 14 slots for circuit cards, 2 slots for non-interchangeable power supplycardsPower Supply 115 Vac ± 10%, 47 - 63 Hz230 Vac ± 10%, 47 - 63 HzTemperature 0° - 50°C (32° - 122°F)Humidity 10 to 90%, non-condensingCertifications CE, ULEIA-530 MODEMDiagnostics 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 SpecificationConnectors Male Board Edge connector, 44 pin (38 contact), mates with chassis slotconnectorPower Consumption 5 wattsTemperature 0° - 50°C (32° - 122°F)Humidity 10 to 90%, non-condensingMaximum Altitude 8000 ft. (2438.4m)Certifications FCC Class AFunction SpecificationDISCRETE I / O CARDPhysical Dimensions 6.2” H x 1” W x 9.1” D (15.7 cm H x 2.5 cm W x 23.0 cm D)Weight 8 oz. approx.Transmission Line I/F Unloaded twisted pair, 19 to 26 AWGOutput Signal 20 mA loop, in a differential configurationDigital Interface 2x RS-422 Balanced pairs, TX, 1 RXSignal Rates 1000 pps maximumTransmission Delay Dependent on characteristics of Intersite Transmission linetypical 50µsecDiagnostics Receive Loop fail indication - with front panel LED and Alarm contactclosure.Alarm Output Bi-directional Solid State relay, NO or NC strap configurationOutput On resistance = 1Ω normalMaximum Output Current = < 250 mAMaximum Output Voltage = 55 VdcInput/Output Insulation Voltage = 2500 VAC MaximumAlarm Reset Input Contact closure (TTL compatible)Connectors Male Board Edge Connector, 44 pin (38 contact), mates with chassis slotconnectorPower Consumption < 100 mA from Chassis supplyTemperature 0° - 50°C (32° - 122°F)
MX-9325GENERAL INFORMATION1-10Table 1-4. VHF Extender Unit Specifications – ContinuedFunction SpecificationHumidity 10 to 90%, non-condensingRS-232 MODEMAlternate Source Unloaded twisted pair, 19 to 26 AWGPhysical Dimensions 20 mA loop, in a differential configurationWeight 2x RS-422 Balanced pairs, TX, 1 RXTransmission Line I/F 1000 pps maximumTransmit Level Dependent on characteristics of Intersite Transmission linetypical 50µsecTransmit Impedance Receive Loop fail indication - with front panel LED and Alarm contactclosure.Receive Impedance 150, 300, 600Ω, or HIGH, strap selectableReturn Loss > 15 dBCarrier Controlled by RTS or constantly ONModulation Conditioned differential di-phase EUROCOM Standard D1Digital Interface V.24/RS-232D (EIA-232)Data Rates, Sync / Async 19.2 kbps (other rates include 1.2, 2.4 3.6, 4.8, 7.2, 9.6 and 14.4 kbps)RTS/CTS Delay 0, 8, 64 milliseconds, switch selectableData Word Length 8, 9, 10 11 bitsStop Bits 1, 1.5, 2 bitsTiming Elements 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.Diagnostics 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)Local Analog Loopback: Activated by manual switch (ANA) or LL Pin 18 of the RS-232 I/F (per V.54, Loop 3)Connectors Male Board Edge Connector, 44 pin (38 contact), mates with chassisconnectorPower Consumption 3 wattsTemperature 0° - 50°C (32° - 122°F)Humidity up to 90%, non-condensingCertifications FCC Part 15, Subpart J Class ANOTEBecause Harris engineers continuously strive to improve allaspects of Harris equipment, specifications are subject to changewithout notice.
MX-9325OPERATION2-1CHAPTER 2OPERATION2.1 INTRODUCTIONThis chapter contains information necessary for operation of the MX-9325 Transceiver at the intermediatemaintenance level. This information consists of operator controls and indicators, and operating instructions. Adescription of the front panel controls, indicators, and connectors is provided in Paragraph 2.2. Basic operatingprocedures are provided in Paragraph 2.3. Setup and programming procedures are provided in Chapter 3.2.2 FRONT PANEL CONTROLS, INDICATORS, AND CONNECTORSFigure 2-1 shows the controls, indicators, and connectors on the MX-9325 Transceiver front panel. Table 2-1describes the controls, indicators, and connectors.Figure 2-2 shows the controls and indicators on the VHF Extender Unit front panel. Table 2-2 describes thecontrols and indicators.
MX-9325OPERATION2-2Figure 2-1. Front Panel Controls, Indicators, and ConnectorsFRONT VIEW123456789325-0039Table 2-1. Front Panel Controls, Indicators, and ConnectorsKey(Fig 2-1) Control/Indicator Function1Power ON/OFF Switch Used to power MX-9325 Transceiver on or off.2 Maintenance Port Used for local control and setup of transceiver.3Frequency Reference Oscillator Test – used to measure and calibrate MX-9325 Transceiver ref-erence oscillator.4Accessory connector Used to test receive and transmit audio parameters in MSKmode.5Fault LED Lights when internal fault is detected.6Transmit LED Lights when MX-9325 Transceiver is transmitting data.7Receive LED Lights when MX-9325 Transceiver is receiving data.8AC Power LED Lights when MX-9325 Transceiver is powered on.9Product Identification Tag Contains MX-9325 Transceiver part number and serial number.
MX-9325OPERATION2-3Figure 2-2. VHF Extender Unit 9325-0049325–0041 2 345Table 2-2. VHF Extender Unit Controls, Indicators, and ConnectorsKey(Fig 2-2) Control/Indicator Function1EIA-530 Modem High Speed ModemPWR EIA-530 Modem - LED Lights Green when modem power is on.RTS EIA-530 Modem – LED Lights Yellow when terminal (DTE) activates theRequest-to-Send line.TD EIA-530 Modem - LED Lights Yellow when SPACE is being transmitted. Flickers as datais transmitted.RD EIA-530 Modem - LED Lights Yellow when steady SPACE is being received. Flickers asdata is received.DCD EIA-530 Modem - LED Lights Yellow when a valid receive signal is present.
MX-9325OPERATION2-4Table 2-2. VHF Extender Unit Controls, Indicators, and Connectors – ContinuedKey(Fig 2-2) Control/Indicator FunctionTEST EIA-530 Modem - LED Lights Red when the modem is in any one of the three Loopbackmodes - DIG, ANA, REM, or when the PATT pushbutton isdepressed.ERR EIA-530 Modem - LED Lights Yellow momentarily when PATT switch is activated andthen goes out. If there are errors in the test pattern, the LED blinksor remains lit.RPF EIA-530 Modem - LED Lights when there’s a power failure in remote standalone unit.May be reset by depressing the red RPT reset pushbutton.DIG EIA-530 Modem - LED The Digital loopback switch causes the local modem to loopreceived data and clock back to its transmitter. Data set ready willturn off.ANA EIA-530 Modem - Pushbutton The Analog Loopback switch causes the local modem to loop itstransmitter output back to its receiver. This Loopback may also beactivated from the DTE per V.54, Loop 3- Local Loopback, viapin 18 on the EIA-530 D sub-connector interface.REM EIA-530 Modem - Pushbuttonswitch The Remote Signal Loopback switch causes the remoted EIA-530modem to loop received data and clock to its transmitter. Data setReady will turn off. This loopback may be also activated from theDTE per V.54, Loop 2 – Remote Loopback, via pin 21 on theEIA-530 D sub-connector interface.PATT EIA-530 Modem - Pushbuttonswitch The pattern switch causes the EIA-530 modem to send and receivea 511-bit test pattern. If errors are encountered by the receiver, theERR LED will light or flicker. The RD and CTS will turn off. NOTEThe modem must be set to constant carrier, or if set to switchedcarrier the RTS signal must be asserted (high) for the test to work.RPF EIA-530 Modem - RESETPushbutton switch When pushed will reset the ERR LED.2Discrete I/O CardPWR Discrete I/O Card - LED Lights Green when Discrete I/O Card power is on.TX Discrete I/O Card - LED Lights Yellow when transmit discrete line signal is asserted.RX Discrete I/O Card - LED Lights Yellow when receive discrete line signal is asserted.ALM Discrete I/O Card - LED Lights Red when circuit does not receive a valid signal for > 10 msRESET Discrete I/O Card - Pushbuttonswitch When pushed, will reset the ALM LED.3RS-232 Modem Low Speed ModemRTS RS-232 Modem - LED Lights Green when RS-232 power is on.PWR RS-232 Modem - LED Lights Yellow when terminal (DTE) activates theRequest-to-Send line.TD RS-232 Modem - LED Lights Yellow when SPACE is being transmitted. Flickers as datais transmitted.RD RS-232 Modem - LED Lights Yellow when SPACE is being received. Flickers as data isreceived.DCD RS-232 Modem - LED Lights Yellow when a valid receive signal is present.
MX-9325OPERATION2-5Table 2-2. VHF Extender Unit Controls, Indicators, and Connectors – ContinuedKey(Fig 2-2) Control/Indicator FunctionTEST RS-232 Modem- LED Lights Red when the modem is in any one of the three Loopbac kmodes DIG, ANA, or REM.RPF RS-232 Modem - LED Lights Red and indicates power failure in remote standalone units.May be reset by depressing the red RPT reset pushbutton.DIG RS-232 Modem PushbuttonSwitch Digital Loopback Switch. When pushed, causes the local modemto loop received data and clock back to its transmitter. Data setready will go low.ANA RS-232 Modem - PushbuttonSwitch Analog loopback switch, when pushed will cause the local modemto loop its transmitter output back to its receiver. This loopbackmay also be activated from the DTE per V.54, Loop 3- LocalLoopback, via pin 18 on the RS-232 D sub-connector interface.REM RS-232 Modem - PushbuttonSwitch Remote Digital Loopback Switch, when pushed will cause theremote RS-232 modem to loop received data and clock to itstransmitter. Data Set Ready will go low. This loopback is alsoactivated from the DTE per V.54, Loop 2 – Remote Loopback, viapin 21 on the RS-232 D sub-connector interface.RPF RS-232 Modem - RESETPushbutton Switch. When pushed, will reset the RPF LED.4Power Supply 115 Vac Power Supply5Power Supply 230 Vac Power Supply2.3 BASIC OPERATIONBefore operating, the MX-9325 transceiver and VHF Extender Unit must be installed per Chapter 8 andconfigured per Chapter 3. The following paragraphs provide basic operating procedures of the MX-9325Transceiver and VHF Extender Unit.2.3.1 Initial Settings and Power UpInitial settings and power up consists of powering up the transmitter and running BIT. Table 2-3 provides theinitial settings and power up procedure.NOTEThe <enter> following each command means that an ASCII CR(carriage return) is sent to the transmitter microcontroller whichcauses the command to be executed.
MX-9325OPERATION2-6Table 2-3. Initial Settings and Power Up ProcedureStep Control Action Observe1Transmitter rear panelJ104 Antenna Connector Connect Antenna or a 50-Ohm/100 WRF Attenuator.2POWER switch on the PCor terminal. Place switch in the ON position. The PC boots or terminalpowers on.Refer to the PC or terminaloperation instructions formore information.3If using a PC, run the desired terminalemulation program. Refer to Chapter 3Paragraph 3.2.1.The PC runs the terminalemulation program.Refer to software operationinstructions for moreinformation.4Ensure that the terminal or terminalemulation program communicationparameters are correctly configured, as described in Chapter 3, Paragraph3.2.1.Refer to software operation instructions for moreinformation.5POWER switch on thetransmitter. Place switch in the ON position. The front panel AC powerindicator LED lights and thePC or terminal displays theinitial power up screen. SeeFigure 2-1.If the PC or terminal does notdisplay the initial power upscreen, refer to Chapter 5,Paragraph 5.2.3.6PC or terminal keyboard Type bit v <enter>.The transmitter executes allBIT tests, then displays theresults on the PC or terminal.If a BIT fault is detected, referto Chapter 5 Paragraph 5.2.2.2.3.2 MX-9325 Transceiver OperationThe MX-9325 Transceiver is operated by means of a VGC. The transceiver’s rear panel mounted host portprovides the interface. The communications protocol is the LAPB, variant of the HDLC protocol. The VGC islinked to the MX-9325 Transceiver rear panel HOST port for local operation or to the rear panel EXTENDERport for remote or split site (two transceivers used as separate receiver and transmitter) operation via a VHFextender unit. All operations are performed from the VGC using ACARS, Mode 2 and management softwarepackages. Refer to the VGC and software operations manual for operating information.
MX-9325PROGRAMMING/SETUP3-1CHAPTER 3PROGRAMMING/SETUP3.1 INTRODUCTIONThis 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 configurationprocedures are performed. Refer to Chapter 2.3.2 SETUPThe following provides instructions on configuration and setup of the MX-9325 Transceiver. These are generallyperformed once during installation.Setup and configuration maintenance commands are performed locally using a PC or ASCII terminal attached tothe MX-9325 Transceiver front panel mounted maintenance port.WARNINGVoltages hazardous to human life are present if Maintenancecommands are not performed properly. Failure to preformMaintenance commands properly can cause Injury or death topersonnel.CAUTIONMaintenance commands are intended for maintenance personnelonly. Failure to perform maintenance commands properly couldcause 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 ConfigurationThe PC running terminal emulation software or the terminal that is connected to the transmitter (rear panel J1MAINTENANCE connector) must be configured as follows:•19,200 baud rate•8 data bits•1 start bit•1 stop bit•No parityRefer to the operation documentation supplied with the terminal or terminal emulation software for more information.
MX-9325PROGRAMMING/SETUP3-2NOTEEnsure that the correct Comm. Port (i.e. Comm. 1) on the PC isselected to correspond with the connection to the MX-9325Transceiver J1 connector.3.2.2 Access LevelsThe MX-9325 Transceiver can be accessed at the following levels:•Monitor Level•Maintenance Level•Off-line LevelIn 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. Allhost computers connected through the host port are prohibited from changing any operational and configurationparameters until the maintenance port returns to monitor access. The host port will continue the ability to transmitand receive data in the access level.In Off–line level, the maintenance port user has the same restrictions as when the user has maintenance levelaccess. In addition, the radio cannot accept data from the host for transmission, and cannot forward to the hostport any data that is received off-the-air.3.2.3 Changing Access LevelsThe following paragraphs describe how to change the MX-9325 Transceiver access levels.3.2.3.1 Monitor LevelTo place the MX-9325 Transceiver into Monitor Level, type the following command on the PC/Terminal:PWD <enter>3.2.3.2 Maintenance LevelTo place the MX-9325 Transceiver into Maintenance Level, type the following command on the PC/Terminal:PWD Maintenance <enter>3.2.3.3 Off-line LevelTo place the MX-9325 Transceiver into Offline Level, type the following command on the PC/Terminal:PWD No RF <enter>3.2.4 Configuration IndexTable 3-1 lists the configuration index for the MX-9325 Transceiver. Column 1 contains the command as wouldbe typed on the PC/Terminal. Column 2 contains the brief descriptions of the command. Columns 3, 4 and 5contain the access level the command can be performed at. Column 6 contains a reference to the paragraph thatdescribes the command in detail.
MX-9325PROGRAMMING/SETUP3-3Table 3-1. MX-9325 Transceiver Configuration IndexCommand Operation Procedure Monitor Maintenance Off-line Para-graphBIT Display BIT results.    3.2.4.1FRQ Display/Modify the current radio operatingfrequency.    3.2.4.2HIS Display a history of PBIT and CBIT faultsthat have occurred since the last time thehistorical BIT status word was cleared.   3.2.4.3HWV Display the revision of each assembly in theMX-9325 Transceiver.    3.2.4.4PSU Display radio power supply voltages. 3.2.4.5PWD Change current access level.    3.2.4.6PWR Display/Modify the current transmitter output power level.    3.2.4.7STA Display the radio operational status.    3.2.4.8SWR Display the Voltage Standing Wave Ratiomeasured during the last transmission.    3.2.4.9TMP Display the power amplifier and power sup-ply heatsink temperatures.    3.2.4.10VER Display the version identifiers of the activeand back-up software images currently resident in the radio.   3.2.4.11FPW Display the forward power level of the lasttransmission. n n n 3.2.4.12DBT Display the detailed BIT results for eachassembly in the radio.    3.2.4.13KEY Display/Modify the current transmitter keystate.    3.2.4.14MDL Display/Modify the modulation level setpoint.    3.2.4.15RPW Display the reverse power level of the lasttransmission.    3.2.4.16TCO Display/Modify the TCXO adjustment value.    3.2.4.17TIM Display/Modify transmitter continuous keytime-out interval.    3.2.4.18SYC Display/Modify radio system configuration.    3.2.4.19MOD Display/Modify current operating mode.    3.2.4.20TTO Generate a test tone.   3.2.4.21MPS Display/Modify the local maintenance portbaud rate and parity settings.    3.2.4.22DPS Display/Modify the host data port baud ratesetting.    3.2.4.23
MX-9325PROGRAMMING/SETUP3-4Table 3-1. MX-9325 Transceiver Configuration Index – ContinuedCommand Operation Procedure Monitor Maintenance Off-line Para-graphRST Reset the radio.    3.2.4.24CLF Clear the BIT fault word and detailed BITfault words for all assemblies.    3.2.4.25CLH Clear the historical BIT status word.   3.2.4.26SEN Run the receiver sensitivity test.    3.2.4.27ACC Display/Modify the Mode 2 maximumnumber of channel access attempts parameter value.   3.2.4.28ADL Display/Modify Mode 2 link level address.    3.2.4.29PER Display/Modify the Mode 2 persistencenumerator parameter value.    3.2.4.30TM1 Display/Modify the Mode 2 inter-accessdelay timer parameter value.    3.2.4.31TM2 Display/Modify the Mode 2 channel busytimer time-out parameter.    3.2.4.32CBT Display/Modify the ACARS channel busytime-out parameter value.    3.2.4.33UPF Display/Modify uplink filtering enable/disable state.   3.2.4.34DNF Display/Modify downlink filtering enable/disable state.    3.2.4.35RSF Display/Modify RSSI filtering enable/disable state.    3.2.4.36RFT Display/Modify RSSI filtering thresholdvalue.    3.2.4.37ACS Display ACARS or Mode 2 statistics, depending on current mode.    3.2.4.38CBF Display/Modify Category B mode filtercharacter.    3.2.4.39SER Display/Modify the radio serial number.    3.2.4.40LPB Display/Modify the LAP-B parameters. 3.2.4.41OVN Display the number of overruns.    3.2.4.42OVZ Display the number of overruns and resetthe number to zero.   3.2.4.43PRG Purge the messages and display the number that were purged.    3.2.4.44ELP Display/Modify the print software errorlog enabled/disabled flag.    3.2.4.45ERR Display the software error log.    3.2.4.46HELP Display the commands available at the current access level.    3.2.4.47TVLS Display the Tx VCO lock state.    3.2.4.48
MX-9325PROGRAMMING/SETUP3-5Table 3-1. Transmitter Operation Index – ContinuedCommand Operation Procedure Monitor Maintenance Offline Para-graphRVLS Display the Rx VCO lock state. n n n 3.2.4.49BFLS Display the BFO PLL lock state.    3.2.4.50LOLS Display the LO PLL lock state.    3.2.4.513.2.4.1 BIT – Display Current BIT ResultsDisplay the current BIT fault code in hexadecimal format using the bit<enter> 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 FrequencyEntering the command frq<enter> displays the current frequency in Hz.Entering the command frq followed by a <space> and a valid frequency value in Megahertz will change theMX-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, theMX-9325 Transceiver rejects the command by displaying an error indication on the PC/Terminal, and no changewill be made to the operating frequency.3.2.4.3 HIS – Display a History of BIT Fault CodesDisplay a history of BIT fault codes using that have occurred since the last time the BIT status word was clearedusing his<enter>.3.2.4.4 HWV - Display the Revision of each Assembly in the MX-9325 TransceiverDisplay the character string containing the revision identifiers of each assembly in the MX-9325 Transceiverusing hwv<enter>. 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-NNX3.2.4.5 PSU – Display MX-9325 Transceiver Power Supply VoltagesDisplay MX-9325 Transceiver power supply voltages using psu<enter>. MX-9325 Transceiver voltages will bedisplayed in tenths of a volt, for example +5V: 4.9. If any of the power supply voltages are not present in theMX-9325 Transceiver, the corresponding value is displayed as 0 V.3.2.4.6 PWD – Change Current Access LevelEntering the pwd command, followed by the correct level password to access to the Maintenance levels. Refer toParagraph 3.2.3 correct password.
MX-9325PROGRAMMING/SETUP3-63.2.4.7 PWR – Display or Change the Current MX-9325 Transceiver Output Power LevelDisplay the current MX-9325 Transceiver output power level using pwr<enter> 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<enter>.3.2.4.8 STA – Display the Radio Operational StatusEntering the command sta<enter> displays the MX-9325 Transceiver operational status word in a hexadecimalformat.3.2.4.9 SWR – Displays Voltage Standing Wave Ratio Measured During the Last TransmissionDisplay the most recently calculated SWR value using swr<enter>. The MX-9325 Transceiver displays with aresolution of +/–.1.3.2.4.10 TMP – Display the Power Amplifier and Power Supply Heatsink TemperaturesDisplay the current power supply and power amplifier heatsink temperatures using tmp<enter> command. Thetemperatures displays with a resolution of +/–.1 degrees Celsius.3.2.4.11 VER – Display Active and back-up Software versionsDisplay the active and back-up software versions stored in the MX-9325 Transceiver memory using ver<enter>.3.2.4.12 FPW – Display the Forward Power LevelDisplay the MX-9325 Transceiver forward power level of the last transmission using fpw<enter>.3.2.4.13 DBT – Display BIT Results for Each AssemblyDisplay the MX-9325 Transceiver detailed BIT results for each assembly using dbt<enter>.3.2.4.14 KEY – Display or Change the Current Transmitter Key StateEntering the command key<enter> 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-9325Transceiver to key or unkey.3.2.4.15 MDL – Display or Change Modulation Level Set PointDisplay the current modulation level set point using the command mdl<enter>.Entering the command mdl followed by a space and a valid modulation present value in decimal will changethe MX-9325 Transceiver modulation level set point.3.2.4.16 RPW - Display the Reverse Power Level of the Last TransmissionDisplay the most recently measured reverse power level using the command rpw<enter>.3.2.4.17 TCO - Display or Modify the TCXO Adjustment ValueDisplay the current MX-9325 Transceivers current TCXO adjustment value using the command tco<enter>.Entering the command tco followed by a space and either + or – will change the TCXO adjustment value to upone step or down one step, respectively.
MX-9325PROGRAMMING/SETUP3-73.2.4.18 TIM - Display or Modify Transmitter Continuous Key Time-out IntervalThis is the maximum number of seconds the transmitter may be keyed continuously before it will automaticallyunkey.Display the maximum number of seconds of the transmitter continuous key time-out interval using the commandtim<enter>.Entering the command tim followed by a space and a valid time-out value in seconds will change the continuouskey time-out interval.3.2.4.19 SYC - Display or Modify Radio System ConfigurationThis defines how the radio is installed and what role it is to play in the communications system it is a part of. Thefirst command parameter defines what type of radio (MX-9325 Transceiver, transmitter, or receiver) the radio willoperate as. The second command parameter defines whether the radio talks to the host computer directly throughthe host data port (Local), or whether it talks to a host computer or another radio via an extender unit through theextender port (Remote). For a radio acting as a transmitter or receiver, it also defines whether the radio is installedas a master radio in a split site configuration, and will be communicating with a remote radio as well as with ahost computer.NOTEChanging the radio system configuration will cause the radio to reboot.Display the radio system configuration using the syc<enter> command.The configuration will be displayed in two parts. The first part as either XC, TX or RX to indicate that the radio isacting as a MX-9325 Transceiver, transmitter, or receiver, respectively. The second part as either LOC, MAS orREM 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 eitherthe word LOC, MAS or REM causes the radio to set it’s system configuration according to the specifiedcombination.3.2.4.20 MOD – Display or Modify Current Operating ModeDisplay the MX-9325 Transceiver operating mode using the mod<enter> command.Entering the command mod followed by a space and either the word “ACARS” or “M2” will change theMX-9325 Transceiver operating mode to ACARS or MODE 2.3.2.4.21 TTO – Generate a Test ToneInternally generate a 1200 Hz test tone, a 2400 Hz test tone, a random sequence of 1200 Hz and 2400 Hz testtones, 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 theMX-9325 Transceiver to continuously transmit a 1000 Hz, 1200 Hz, 2400 Hz, or a random sequence of 1200 Hzand 2400 Hz tones, respectively.Entering the command tto followed by a space and the word OFF causes the MX-9325 Transceiver to terminateany test tone generation and transmission currently taking place. Upon receiving a valid “TTO” command andparameter, the radio displays the action being taken on the PC/Terminal.
MX-9325PROGRAMMING/SETUP3-83.2.4.22 MPS – Display or Modify the Maintenance Port Baud Rate and Parity SettingsDisplay the current Maintenance Port baud rate and parity settings using the command mps<enter>.The radio displays the maintenance port configuration in two parts: the first part as a numerical value to indicatemaintenance port baud rate, and the second part as either O, E, or N to indicate that the maintenance port is set forOdd, Even, or No parity, respectively.Entering the command mps followed by a space and a numerical value for the desired baud rate, followed by aspace and either the character O, E, or N shall cause the radio to set its maintenance port baud rate and paritysetting to the specified values.3.2.4.23 DSP – Display or Modify the Host Data Port Baud Rate SettingDisplay the current Host Data Port baud rate setting using dsp<enter> command.Entering the command dsp followed by a space and a numerical value for the desired baud rate, shall cause theradio to set it’s host data port baud rate to the specified value.3.2.4.24 RST – Reset the RadioEntering the command rst<enter> 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 AssembliesEntering the command clf<enter> causes the radio to clear all current faults by resetting all bits in the BIT faultword and in the detailed BIT fault words for each assembly.3.2.4.26 CLH – Clear Historical BIT Status WordEntering the command clh<enter> causes the radio to clear the fault history by resetting all bits in the historicalBIT status word.3.2.4.27 SEN – Run Receiver Sensitivity TestEntering the command sen<enter> 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 ValueDisplay the radio Mode 2 maximum number of channel access attempts parameter value using the acc<enter>command.Entering the command acc followed by a space and a numerical value for the desired Mode 2 maximumnumber of channel access attempts, causes the radio to set the maximum number of channel access attemptsparameter to the specified value.3.2.4.29 ADL – Display or Modify Mode 2 Link Level Address ListDisplay the current link level address list, or an indication that the list is empty if there are no addresses in the listusing the command adl<enter>.Entering the command adl followed by a space and a value representing an address to be added to the list, causesthe radio to add the specified value to the address list. If a user attempts to add an address and the list alreadycontains 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 listand indicate on the PC/Terminal that the list is now empty.
MX-9325PROGRAMMING/SETUP3-93.2.4.30 PER – Display or Modify the Mode 2 Persistence Numerator Parameter ValueDisplay the Mode 2 persistence numerator parameter value using the per<enter> 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 2persistence numerator parameter outside the range 0 to 255 (inclusive), the radio rejects the command bydisplaying an error indication on the PC/Terminal, and no change will be made to the persistence numeratorparameter.3.2.4.31 TM1 – Display or Modify the Mode 2 Inter-Access Delay Timer Parameter ValueDisplay the Mode 2 inter-access delay timer parameter in half-milliseconds using the tm1<enter> command.Entering the command tm1 followed by a space and a numerical value for the desired Mode 2 inter-accessdelay timer in half-milliseconds, causes the radio to set the inter-access delay timer parameter to the specifiedvalue. Changing the Mode 2 inter-access delay timer outside the range 1 to 250 (inclusive), the radio rejects thecommand by displaying an error indication on the PC/Terminal, and no change will be made to the inter-accessdelay timer parameter.3.2.4.32 TM2 – Display or Modify the Mode 2 Channel Busy Timer Time-out Parameter ValueDisplay the Mode 2 channel busy timer time-out parameter in seconds using the tm2<enter> command.Entering the command tm2 followed by a space and a numerical value for the desired Mode 2 channel busytimer time-out value in seconds, causes the radio to set the channel busy timer time-out parameter to thespecified value. Changing the Mode 2 channel busy timer time-out outside the range 6 to 120 (inclusive), theradio rejects the command by displaying an error indication on the maintenance port terminal, and no change willbe made to the channel busy timer time-out parameter.3.2.4.33 CBT – Display or Modify the ACARS Channel Busy Time-out Parameter ValueDisplay the ACARS channel busy time-out parameter in seconds using the cbt<enter> command.Entering the command cbt followed by a space and a numerical value for the desired ACARS channel busytime-out value in seconds, causes the radio to set the ACARS channel busy time-out parameter to the specifiedvalue. Changing the ACARS channel busy time-out outside the range 6 to 120 (inclusive), the radio rejects thecommand by displaying an error indication on the PC/Terminal, and no change will be made to the channel busytime-out parameter.3.2.4.34 UPF – Display or Modify Uplink Filtering Enable/Disable StateDisplay the current uplink filtering state as either “ON” or “OFF” using the upf<enter> command.Entering the command upf followed by a space and either the word “ON” or “OFF” causes the radio to enable ordisable uplink filtering, respectively.3.2.4.35 DNF – Display or Modify Downlink Filtering Enable/Disable StateDisplay the current downlink filtering state as either “ON” or “OFF“ using the dnf<enter> command.Entering the command dnf followed by a space and either the word “ON” or “OFF” causes the radio to enable ordisable downlink filtering, respectively.
MX-9325PROGRAMMING/SETUP3-103.2.4.36 RSF – Display or Modify RSSI Filtering Enable/Disable StateDisplay the current RSSI filtering state as either “ON” or “OFF” using the rsf<enter> command.Entering the command rsf followed by a space and either the word “ON” or “OFF” causes the radio to enable ordisable RSSI filtering, respectively.3.2.4.37 RFT – Display or Modify RSSI Filtering Threshold ValueDisplay the RSSI filtering threshold parameter value using the rft<enter> 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 filteringthreshold parameter outside the range 0 to 100 (inclusive), the radio rejects the command by displaying an errorindication 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 StatisticsDisplay the most recently calculated S1 and S2 statistic values when in ACARS using the acs<enter> command.Display the most recently calculated S3 and S4 statistic values when in Mode 2 using the acs<enter> command.3.2.4.39 CBF – Display or Modify Category B Mode Filter CharacterDisplay the current Category B mode filter character using the cbf<enter> command.Entering the command cbf followed by a space followed by a valid Category B mode filter character, causesthe radio to change Category B mode filter character to the specified character.3.2.4.40 SER – Display the Radio Serial NumberDisplay the MX-9325 Transceiver serial number using the ser<enter> command.3.2.4.41 LPB – Display or Modify the LAP-B ParametersDisplay the Host Port LAP-B parameter values using the lpb<enter> 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 OverrunsDisplay the number of overruns using the ovn<enter> command.3.2.4.43 OVZ – Display the Number of Overruns and Reset the Number to ZeroDisplay the number of overruns and reset the number to zero using the ovz<enter> command.3.2.4.44 PRG – Purge the Messages and Display the Number of Purged MessagesPurge messages and display the number of messages that have been purged using the ovz<enter> command.3.2.4.45 ELP – Display or Modify the Print Software Error Log enabled/disabled FlagDisplay the current print software error log state as either “ON” or “OFF” using the elp<enter> command.Entering the command elp followed by a space and either the word “ON” or “OFF” causes the radio to changethe current print software error log state.3.2.4.46 ERR – Display the Software Error LogDisplay the current software error log using the err<enter> command.
MX-9325PROGRAMMING/SETUP3-113.2.4.47 HELP – Display the Commands Available at the Current Access LevelDisplay the commands that are valid at the current access level using the help<enter> command.3.2.4.48 TVLS – Display the Tx VCO Lock StateDisplay the Tx VCO lock state using the tvls<enter> command.3.2.4.49 RVLS – Display the Rx VCO Lock StateDisplay the Rx VCO lock state using the rvls<enter> command.3.2.4.50 BFLS – Display the BFO PLL Lock StateDisplay the BFO PLL lock state using the bfls<enter> command.3.2.4.51 LOLS – Display the LO PLL Lock StateDisplay the LO PLL lock state using the lols<enter> command.
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MX-9325FUNCTIONAL DESCRIPTION4-1CHAPTER 4FUNCTIONAL DESCRIPTION4.1 INTRODUCTIONThis chapter covers the functional description of the circuitry in the transceiver. Paragraph 4.2 provides asimplified 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 andtroubleshooting information. For parts list and family tree information, refer to Chapter 7, Paragraph 7.4. Refer toAppendix A for the glossary of terms.4.2 SIMPLIFIED TRANSCEIVER FUNCTIONAL DESCRIPTIONSee Figure 4-1. The transceiver contains J1 Host Port for computer interface, digital processor and MSK/D8modem 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 datatransceiver, the radio operates according to the ACARS specifications. The transceiver contains an internal MSKmodem function providing all modulation/demodulation and CSMA for media access control. As a digital datatransceiver, the radio operates in Mode 2 (31.5 kbit per second suppressed carrier Differential 8 Phase Shift Keymodulation, CSMA.4.3 SIMPLIFIED VHF EXTENDER UNIT FUNCTIONAL DESCRIPTIONSee Figure 4-2. The VHF Extender Unit contains a EIA-530 Modem and a discrete I/O card required for remoteand 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 signaloutput lines for transceiver operation in split site ACARS and Mode 2. Signal interfaces are extended to theremote site by means of a current loop interface circuit, capable of driving the required maximum length of hardwire lines between sites.The EIA-530 modem interface is used in the VHF Extender Unit to support the extension of computer to theremote transceiver rear panel host port, or the from a local transceiver to a remote transceiver in split siteconfiguration. 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 remotedigital loopback. The loops can be manually activated from the front panel or via control signals from theinterface connector. In addition, the EIA-530 modem incorporates a built-in BERT to enable complete testing ofboth 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 192kbps, 22 AWG wire is sufficient for intersite lines up to 4.5 km in length. Intersite lines of 19 AWG wire arerequired to support transmission at 192 kbps on lines greater than 4.5 km long. Table 4-1 lists the approximaterange 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–232modem is selected for use in the Extender Units to support the extension of the Antenna Switch Serial ControlPort from the local computer to remote site Antenna Switches in Remote Site and Split Site configurations.
MX-9325FUNCTIONAL DESCRIPTION4-2The modem’s range at a particular data rate is dependent on the transmission line wire gauge. At a maximum datarate of 19.2 kbps, 26 AWG wire is sufficient for intersite lines up to 7.5 km in length. The RS–232 modemfeatures V.54 diagnostic capabilities to perform local analog loopback and local and remote digital loopback. Theloops can be manually activated from the front panel or via control signals from the interface connector. Table 4-2lists the approximate range or the RS-232 Modem over various gauges of unconditional transmission lines.Figure 4-1. Transceiver Simplified Block Diagram9325-005GroundcomputerInterface Digital Processor & MS K FunctionFilterPower AmpDirectional couplerGroundcomputerInterfaceTransmitter FunctionReceiverFunctionFigure 4-2. Extender Unit Simplified Block Diagram 9325-006Rear Panel Interface RS-232 Modem(For ARS)Discrete I/OEIA-530 Modem5Km5Km5Km
MX-9325FUNCTIONAL DESCRIPTION4-3Table 4-1. EIA-530 Modem Approximate Maximum RangeDATARATE 19 AWG 22 AWG 24 AWG 26 AWGkm miles km miles km miles km miles192 kbps 6.0 3.7 4.5 2.8 3.5 2.2 2.7 1.7144 kbps 10.6 6.6 6.75 4.2 4.5 2.8 3.4 2.1128 kbps 12.4 7.7 7.3 4.5 5.0 3.1 3.6 2.2Table 4-2. RS-232 Modem Approximate Maximum RangeDATARATE 19 AWG 24 AWG 26 AWGkm miles km miles km miles19.2 kbps 22.5 14 10 6.2 7.5 4.614.4 kbps 24.5 15.2 11 6.8 8.2 5.19.6 kbps 29 18 13 8 9.5 5.94.4 DETAILED TRANSCEIVER FUNCTIONAL DESCRIPTIONThe following paragraphs provides detailed functional description of the transceiver. Paragraph 4.4.1 describesthe 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 4.4.74.4.2 Data/RF/IF Signal PathsThe following paragraphs describe the functions of each assembly as they relate to the transmit and receive signalpath through the transceiver.See Figure 4-3. Data messages enter A1A2 Digital Board PWB Assembly via the rear panel host port, extenderport as LAPB Frames.4.4.2.1 A1A2 Digital PWB AssemblyData to be transmitted enters A1A2 Digital PWB Assembly Host or extender interface port. The interface portperforms level shifting and routes serial data to a Power PC860 microprocessor. The microprocessor performs allrequired integrity checks then sends data to a DSP which processes the digital data signals. The digital data is thensent to the DAC to be converted to baseband analog. The DAC routes a parallel analog In-phase and Quadrature
MX-9325FUNCTIONAL DESCRIPTION4-4(I and Q) audio signal to the exciter interface on A1A2 Digital PWB Assembly where it is sent to A1A3 ExciterPWB Assembly.In receive mode, the received signal is sent to A1A2 Digital PWB Assembly where the analog baseband signal isconverted to digital. The A1A2 Digital PWB Assembly mounted DSP measures the RSSI and implements AGCby controlling the receiver’s IF and RF gain. In split site configuration, the DSP monitors the RSSI as reported bylocal receiver, via the VHF extender unit, interfaces to generate a channel busy signal. The channel busy signalapplies the algorithm to the DSP to determine the correct transmission time. The DSP accepts baseband I and Qaudio 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 datato the microprocessor. The microprocessor formats the data for delivery to the VGC via A1A2 Digital PWB hostor extender interface port.4.4.3 Transmit RF Signal PathSee Figure 4-4. The following paragraphs describe the Transmit RF Signal path of the MX-9325 Transceiver.4.4.3.1 A1A3 Exciter PWB AssemblyThe A1A3 Exciter PWB Assembly produces a frequency synthesized RF output modulated signal. The I and Qaudio signals are amplified and sent to a Vector Modulator Circuit. The modulated RF is sent through a secondamplifier then attenuated before leaving A1A3 Exciter PWB Assembly and routed to A1A4A1 Power AmplifierPWB.4.4.3.2 A1A4A1 Power Amplifier AssemblyThe A1A4A1 Power Amplifier Assembly consists of two amplifier stages which amplify the modulated RFsignals from A1A3 Exciter PWB Assembly to a level of 25 watts, nominal. The amplified RF signal is sent toA1A5 Low Pass Filter and Directional Coupler PWB Assembly.4.4.3.3 A1A6 Directional Coupler AssemblyThe A1A5 Low Pass Filter and Directional Coupler Assembly contains a low pass filter and antenna switch. Thelow 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 andreflected power on the antenna feedline. The antenna switch switches the antenna between the power amplifieroutput and receiver RF input. It consists of a solid-state PIN diode switch using quarter-wave transmission lines toprovide isolation between the transmitter output and the receiver input.4.4.4 Receiver RF Signal PathSee Figure 4-5. The following paragraphs describe the Receive RF Signal Path.4.4.4.1 A1A5 Low Pass Filter and Directional Coupler AssemblyThe transceiver receives RF messages via the J5 antenna port. RF is passed through A1A5 Low Pass Filter andDirectional Coupler Assembly and A1A8 Helical Filter Assembly before entering A1A7 Receiver PWBAssembly.4.4.4.2 A1A7 Receiver PWB AssemblyThe A1A7 Receiver PWB Assembly utilizes frequency synthesized oscillators to down convert and demodulateon channel signals to be sent to A1A2 Digital PWB Assembly. The received signal strength voltage is also sent toA1A2 Digital PWB Assembly for processing.
MX-9325FUNCTIONAL DESCRIPTION4-5/4-6A4Figure 4-3. Data/Transmit/Recieve Signal Path Block Diagram9325-007IQLOCALVGCVHFEXTENDERUNIT(MODEM)HOSTINTERFACEEXTENDERINTERFACERSSIPOWERPC860MICROPROCESSORIQEXCITERINTERFACEVHFEXTENDERUNIT(MODEM)I INAM_DEMODAM_DEMODDEMOD_DCRF_RSSIIF_AGC_CTRLRX_QRX_IRF_AGC_CTRLQ INQ OUTI OUTREMOTE/SPLITSITEVGCTOEXCITERPWBRECEIVERINTERFACECODEC2:1 MUXDACP/OJ20P/OJ12FROMRECEIVERPWBA/DDSPPART OFREAR PANELPART OFREAR PANEL
MX-9325FUNCTIONAL DESCRIPTION4-7/4-8A4Figure 4-4. Transmit RF Signal Path Block Diagram9325-008FROM DIGITALPWBI CHANNELMIXERI CHANNELDRIVERI CHANNELFILTERQ CHANNELFILTER Q CHANNELDRIVERVARIABLEATTENUATOREXCITERAMPLIFIERQUADCOUPLER RFCOMBINERQ CHANNELMIXERI INQ INIIIQQQTO RECEIVERCIRCUITSOUTPUTDRIVERPREDRIVERDIRECTIONAL COUPLER ASSEMBLY A5POWER AMPLIFIERASSEMBLYA1A4A1FEEDBACKAMPLIFIERREFERENCEOSCILLATORCIRCUITLOWPASSFILTER STRIPLINECOUPLER ANTENNASWITCHEXCITER PWB ASSEMBLYJ2 J1P/OJ3J5J2 J1
MX-9325FUNCTIONAL DESCRIPTION4-9/4-10A4Figure 4-5. Recieve RF Signal path Block Diagram9325-009J5DIRECTIONALCOUPLERASSEMBLYANTENNASWITCHFROM TRANSMITTERCIRCUITSANTENNAPORTHELICALFILTERASSEMBLYRF PREAMPLIFIER MIXERVCOLOREFERENCEOSCILLATOR IN1ST IFAMPLIFIERLOWPASSFILTER2ND IFAMPLIFIER45 MHz IFNARROWBANDFILTERNARROWBANDFILTERNARROWBANDMIXER/IFWIDEBANDMIXER/IFIAMPLIFIERI OUTI PREAMPLIFIERIQAMPLIFIERQ PREAMPLIFIERQQ OUTMIXER/QUADRATUREDETECTORIQTO A1A2DIGITAL PWBASSEMBLYBFO_TVBFO_ENABLEBFONARROWBANDFILTERWIDEBANDFILTERWIDEBANDFILTERWIDEBANDFILTERSWITCHRSIAMPLIFIERRF_RSI RSSI OUTSWITCH455 MHz IFAMDETECTORDEMOD_INVDEMOD_NINV +–AM_DEMODOUTRSSILO45 MHz IF45 MHz IF455 KHz455 KHz455 KHz IF455 KHz IFTO A1A2DIGITAL PWBASSEMBLYP/O A4 HEAT SINKSJ3 J1A1A2 RECEIVER PWB ASSEMBLYP/O J3
MX-9325FUNCTIONAL DESCRIPTION4-114.4.5 Control / Interface Signal PathsSee Figure 4-6. This figure illustrates the control paths that exist between the front panel maintenance port, frontpanel LEDs, rear panel data port, DSP, exciter, receiver, power amplifier, and antenna. The control paths arewhere the transceiver interacts with an external control terminal in the form of a PC or ASCII terminal. Since nooperator controls exist on the transceiver front panel, all control functions for the transceiver originate at the PCor 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 ofcontrol 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 4.4.5.54.4.5.1 Front Panel InterfaceFront 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-232port using a standard DB-9 serial connector. Data signals from the PC or terminal enter the transceiver throughthis port and go directly to A1A2 Digital PWB Assembly. The control software is actually contained in aEEPROM on A1A2 Digital PWB Assembly, allowing transceiver control via a dumb terminal. The controlsoftware is accessed by the microcontroller on A1A2 Digital PWB Assembly, decoded, and used to initiate suchactions as frequency and bandwidth changes, self-test, and other parameter changes or readbacks. In addition, anA1A2 Digital PWB Assembly mounted light-emitting diodes on the front panel indicate AC power, receivecarrier detector, transmit key status and fault.4.4.5.2 Internal A1A2 Digital PWB AssemblyThe A1A2 Digital PWB Assembly controls all functions in the transceiver and provides all interfaces to the rearpanel data port. A Flash EEPROM IC contains all software for the processors. At initialization, themicroprocessor fetches its operating software from the Flash EEPORM IC and copies it to its external DRAM ICfor 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 oneach internal electrical subassembly. A single I2C bus interconnects these assemblies and the microprocessor. Thisbus 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 parameterblocks in the EEPROM, updated when changes are commanded by the host or extender interface port. Thesedevices reside on a software controlled serial bus, which is not used after initialization is complete and remainsidle during normal transceiver operation.During operation, A1A2 Digital PWB Assembly monitors certain diagnostic signals to determine if thetransceiver is still capable of operation within specifications. This process is known as BIT. Synthesizer lockdetect lines, heatsink temperature, antenna port match and regulated power supply voltages are examples ofmonitored signals which, when out of tolerance, cause the unit to either reduce transmitter power level or create a
MX-9325FUNCTIONAL DESCRIPTION4-12key inhibit condition. A multiplexed eight bit A/D converter connects to the microprocessor for most of theanalog 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 thetransceiver. A VCTCXO on A1A2 Digital PWB Assembly provides a 14.745 MHz signal which is stable towithin 1 ppm over the temperature range. The RDAC provides a means of accurately setting the oscillatorfrequency and for compensating for crystal aging. The microprocessor controls the RDAC at initialization to finetune the output frequency. The RDAC value is determined during factory testing, and stored into the FlashMemory IC parameter blocks.4.4.5.3 A1A3 Exciter PWB AssemblyTo perform the transmit function, A1A2 Digital PWB Assembly accepts data conforming to the interfacespecification from the host port and performs all required integrity checks on the data. The A1A2 Digital PWBAssembly enables circuitry on the exciter and power amplifier assemblies, and monitors the output of the dualdirectional coupler in order to measure forward and reflected power. The output power level of the transmitter isunder control of A1A2 Digital PWB Assembly for ALC purposes. At the conclusion of the transmitted burst, itdisables 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 InterfacesThe A1A2 Digital PWB Assembly individually controls A1A5 Low Pass Filter and Directional CouplerAssembly mounted antenna switch, PA bias and driver bias and power control attenuator. These functions alongwith the timing relationship between these signals and the exciter control signals for key up and down aredetermined by the DSP.Forward and reflected power samples are input to the DSP for power measurement. The DSP calculates the powerand SWR using calibration data stored on the directional coupler assembly and fetched by the microprocessor atpower 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. Thisinput is used to monitor the length of RF transmissions. If a transmission exceeds a fixed value, themicroprocessor unilaterally and permanently disables the transmit capability. Two mechanisms exist for disablingtransmissions: the microprocessor can disable the transmit VCO via a digital switch, and prevent the DSP frombiasing 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 orMode 2. In ACARS mode, a stuck carrier is declared when a carrier signal is detected for more than a configuredamount of time. Upon detecting the presence of a carrier for more than this configured time, the transceiver sendsan unsolicited response message to the computer via the host port indicating a stuck carrier condition. Thetransceiver detects the absence of a stuck carrier signal and sends an unsolicited response message to thecomputer 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 expirationof the TM2 timer, the transceiver shall send an unsolicited response message to the computer indicating timerTM2 has expired and a stuck carrier condition exists. The transceiver determines the absence of a stuck carrierwhen successful access of the channel occurs. The transceiver sends an unsolicited response message to thecomputer indicating that a stuck carrier condition no longer exists.
MX-9325FUNCTIONAL DESCRIPTION4-13/4-14A4Figure 4-6. Control Signal Path Block Diagram9325-010RECEIVERCIRCUITSRF_RSSIRECEIVERINTERFACE CODECDSPDIRECTIONALCOUPLERPOWERPC860MICROPROCESSORCONFIGURATIONEEPROMEXCITERCIRCUITSRF_RSSIEXCITERINTERFACECODECRX BIT SIGNALSLOCK DETECTTX BIT SIGNALSPWR_CTRLVSWRPAFWR_PWRPAINTERFACERVS_PWRFWD_PWRRVS_PWRRS–232MAINTENANCEPORTINTERFACEFRONTPANELLEDRECEIVERREFERENCEEXCITERREFERENCEFRONTPANELREFERENCEHOST PORTINTERFACEEXTENDERPORTINTERFACEMAINTENANCEPC / TERMINALRECEIVERBOARDEXCITERBOARDLOCAL VGCEXTENDER(MODEM)EXTENDER(MODEM)REMOTE/SPLIT SITEVGCVCTXOREFERENCEOSCILLATORRDACTEMP ADJRSSIDC POWERADC FLASHEEPROM IC DRAM ICPS_TEMPHS_TEMPEXCITER_AMPTX_OSC_AMPSQL_CTLDIGITAL PWB ASSEMBLYP/O REAR PANELP/O REAR PANELFRONT PANELmAINTENANCEPORTJ1J12J20J3J3J1J2J16J20J12J28
MX-9325FUNCTIONAL DESCRIPTION4-154.4.5.5 Receive Control InterfaceThe microprocessor programs the DDS and synthesizer loops with the common software controlled clock anddata outputs. Discrete, chip select outputs are provided for each serially programmed device and IF bandwidthselect and BFO enable outputs are provided to the receiver. The microprocessor monitors the three synthesizerlock detect lines.The DSP accepts an RSSI voltage supplied to an A/D converter, and uses D/A converters to control the IF gainand RF attenuator stages for AGC. The bandwidth of the RSSI input is 10.5 kHz. Analog I&Q audio inputs tomatched A/D converters are used for D8PSK demodulation. A DC offset voltage for I&Q audio is provided forlevel shifting purposes. For AM demodulation, the recovered AM signal and a DC voltage proportional to thenoise 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 commandto detect faults and ensure proper operation. BIT activates either remotely or locally via the front panelmaintenance interface port. The transceiver reports the results of BIT tests to the PC/Terminal upon operatorcommand either remotely or locally.The extender unit provides internal diagnostic testing to ensure proper operation. Internal diagnostic testing isapplicable to transceivers and extender units in split site and remote site configurations. As part of BIT for splitsite 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 remotetransceivers.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 responsewhenever there is a change in the status.BIT tests receiver sensitivity as part of the power up or initialization sequence. The transceiver has the capabilityfor a commanded receiver sensitivity test. The result of the receiver sensitivity test is reported in the BIT statusresponse.Table 4-3 lists the BIT performed when the MX-9325 Transceiver is powered on. Refer to Chapter 3 forinformation on performing a BIT command while the MX-9235 Transceiver is in operation. Refer to Chapter 5for BIT fault code descriptions.Table 4-3. MX-9325 Transceiver Power On BITBIT Test Failure CriteriaMemory test Read/write RAM test fail (critical fault), EEPROM test fail (Boot Fault).Boot sequence Software image failed to load correctly.DC voltage test Voltage out of tolerance.EEPROM assembly checks Configuration information of EEPROM assemblies is invalid.Synthesizers and oscillators out oflock Oscillators failed to lock.Power amplifier bias/RSSI check No power reading of RSSI.Receiver sensitivity Sensitivity is too low.Interprocessor communications test Communications with the VGC is lost.RAM checks RAM verification checks failed.
MX-9325FUNCTIONAL DESCRIPTION4-164.4.7 MX-9325 Transceiver Power DistributionSee Figure 4-7. Power distribution consists of converting a 85 Vac to 265 Vac input to the various DC voltagesrequired by the transceiver assemblies, as discussed in the following paragraphs.4.4.7.1 AC Line Voltage Path85 Vac to 265 Vac enters the transceiver through rear panel mounted connector J1. The AC passes through a linefilter and the front panel mounted AC Power Switch (CB1) and goes to A1A4A2 28 Vdc Power Supply. TheA1A4A2 28 Vdc Power Supply takes the AC voltage and sends it to a power factor corrector module where it isconverted to 300 Vdc, then converted again to +28 Vdc. The +28 Vdc is sent to A1A6 Low Voltage Power Supplywhere +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 PathThe +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 PathThe +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 A1A6J64.4.8 Software DownloadThe MX-9325 Transceiver maintains three non-volatile storage areas called Software Banks, to hold downloadedsoftware data. At any time, two of the banks are considered active and contain valid copies of the MX-9325Transceiver operating software. This enables the radio to execute the most recent downloaded version of itssoftware, or to switch to a previously downloaded version via instruction from the VGC. The third bank isregarded as inactive and is kept available as a receiving area for the next version to be downloaded. When aMX-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 throughthe host or Extender interface port. The MX-9325 Transceiver remains fully operational during the softwaredownload process. software for all of the various processors inside the MX-9325 Transceiver are sent to the radiobundled as one large package of binary data. Software downloads are stored by the radio into a volatile bufferuntil the MX-9325 Transceiver has received all of the data and the data’s integrity has been verified.4.4.9 VHF Extender UnitThe following paragraphs describe the data and control signal paths of the VHF Extender Unit circuit cards. Foradditional information on the VHF Extender Unit and Modem Cards, refer to Chapter 1 Paragraph 1.5.
MX-9325FUNCTIONAL DESCRIPTION4-1785 – 265VACPOWERFACTORCORRECTIONDC/DCCONV +28 V+5 V+15 VDC/DCCONVDC/DCCONV15VREG5VREGAC HOTA1A4A2 28 VDC POWER SUPPLY ASSEMBLYAC NEUTRALCB1DC/DCCONV +28 VTo A4A1A1A6 LOW VOLTAGE POWER SUPPLY AS-SEMBLYFigure 4-7. Power Distribution Functional Block Diagram9325-011
MX-9325FUNCTIONAL DESCRIPTION4-184.4.9.1 EIA-530 ModemA high speed, short-range synchronous data modem card. The EIA-530 MODEM is utilized to extend the Rearpanel mounted Host Port EIA-530 serial data interface between the local site VGC or MX-9325 and remote siteMX-9325.The following paragraphs describe the data signal path of the EIA-530 Modem.4.4.9.1.1 CDP Encoder/DecoderThe 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. Theencoder/decoder can be configured for 4-wire full duplex or 4-wire half-duplex. Refer to Chapter 8 forconfiguration information.4.4.9.1.2 Timing ClockA timing and clock circuit provides the transmit clock to the CDP encoder.4.4.9.1.3 Transmit LevelThe transmit output signal level is configured from 0 to -6 dBm.4.4.9.1.4 Receive CircuitA receive filter attenuates unwanted out-of-band frequency content. The automatic equalizer selects the properequalization level dependent upon the selected data rate. The AGC provides gain to compensate for transmissionline attenuation.4.4.9.1.5 Asynchronous / Synchronous ConverterThe 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 DiagnosticsThe V.54 loops are activated whether manually from modem front panel pushbutton or via pins 18 and 21 on theDTE data interface. Pins 18 and 21 adhere to the EIA standard, providing a Type II circuit (EIA-423) bi-polarsignal interface to the DTE. The circuits will provide local analog loopback, local digital loopback and remotedigital loopback. Either the front panel pushbutton or the DTE interface controls may be disabled via jumpersettings. Refer to Chapter 8 for configuration information.4.4.9.1.7 Test PatternThe test pattern generator (PATT GENER) facilitates local and remote modem testing with the standard 511pseudo-random bit pattern. When one of the loopback tests is invoked and the PATT pushbutton on the front panelis activated, the circuit sends and checks the pattern with an internal Bit Error Rate Tester (BERT). If the BERTfinds 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 featurecan only be utilized when an EIA-530 Modem is connected to a remote stand-alone version of the modem. Itcannot be utilized in the modem while in the extender units.4.4.9.1.9 EIA-530 Modem power DistributionThe EIA-530 Modem interfaces the VHF Extender Unit chassis via a 44-pin card edge connector. The cardreceives DC power from the chassis rear panel via the edge connector. The corresponding 5-pin terminal blockand 25-pin connector provide the external interfaces to all signals.
MX-9325FUNCTIONAL DESCRIPTION4-194.4.9.2 Discrete I/O CardThe Discrete I/O Card is a plug-in card that resides in alternate, even numbered slots of the extender unit. Thiscard is only required for the extension of Channel Busy and mute signals in split site configurations operatingACARS or Mode 2. It permits a discrete control signal to be sent or received over a dedicated intersite line. Thereare two (2) sections to the circuit, one transmit and one receive. The transmit circuit converts an RS-422 levelinput 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-422level output signals. The loop receive signal from transmission line interface is also differential. The assemblycontains 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 CircuitA front panel TX indicator (yellow LED) provides polarity status of the transmitting data signal. When theRS-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. TheRS-422 signal passes through a RF filter circuit, then is converted to a TTL signal that is formed into adifferential 20 mA loop signal. The 20 mA loop signal excursions will not exceed 24 volts. This permitsoperation over long dedicated transmission lines where loop resistance is measured in 100’s of ohms. A currentlimiting circuit is provided to protect the 20 mA loop transmitter from inadvertent transmission line shorts (eitherconductor to conductor or conductor to shield). Secondary transient protection is included in the 20 mA loop toreduce external EMI threats.4.4.9.2.2 20 mA Loop Transmitter CircuitThe Discrete I/O Card provides an RX indicator (green LED) located on the front panel that provides polaritystatus of the received data signal. When the 20 mA loop (+) lead is positive with respect to the (–) lead, the LEDwill 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 maybe 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 EMIthreats. The incoming 20 mA signal is translated into separate TTL signals for each current direction, the digitalsignals are logically conditioned so that leading and trailing edges of the signals are clean. The signalsrepresenting the differential state are converted into a single TTL signal that may be inverted by way of a DIPswitch if desired. The TTL signal is then converted into an RS-422 standard signal. The RS-422 signal passesthrough 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 anexclusive–OR of the separate TTL signals representing the original differential 20 mA signal. An alarm exists ifthe TTL levels are the same. This condition will exist if the transmission line is inadvertently open, closed, or itthe 20 mA loop transmitter fails. A transient fault must exist for at least 10 ms in order to be passed to the alarmlogic. The alarm logic may be reset locally from the front panel of the Discrete I/O Card or from a remotelocation. A solid-state relay provides a remote alarm interface. This alarm relay may be configured for either anormally open or normally closed fault indication.
MX-9325FUNCTIONAL DESCRIPTION4-204.4.9.2.3 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 modemis selected for use in the extender units to support the extension of the optional Antenna Switch Serial ControlPort 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 orhalf-duplex over unconditioned lines.The modem utilizes conditioned differential di-phase modulation (EUROCOM Standard D1) which providesimmunity to background noise and eliminates normal line distortion. This modulation scheme enables efficienttransmission 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/DecoderThe CDP encoder receives data from the TXD (DTE TX Data) input and modulates the data using the conditionaldi–phase modulation (CDP) technique. Similarly, the CDP decoder receives data from the (RCV) transmissionline interface and demodulates the receive data stream. The encoder/decoder may be configured for 4-wire fullduplex or 4-wire half-duplex operation. Refer to Chapter 8 for the proper configuration setting.4.4.9.2.5 Timing ClockThe modulation timing circuit provides the transmit clock to the CDP encoder. There are four clock sourcesselectable, 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 ConverterThe data is transmitted over the lines between modems synchronously. When the asynchronous data signal isinput to the modem, this circuit provides the necessary conversion to synchronous data in compliance with ITUV.22. Frequency deviations between the modem and the DTE up to +/– 1.1% are compensated for bylengthening/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 theproper configuration setting.4.4.9.2.7 Transmit LevelThe transmit output signal (XMT) level may be configured for 0, –3, –6, or –9 dBm. Refer to Chapter 8 for theproper configuration settings.4.4.9.2.8 Receive CircuitThe Receive Filter attenuates unwanted out-of-band frequency content. The Automatic Equalizer circuit selectsthe proper equalization level dependent upon the selected data rate. The AGC circuit provides gain to compensatefor transmission line attenuation. The AGC operates in one of two modes: continuously ON or controlled by theDCD line. When the DCD line is active, the AGC is active – when the DCD line is inactive, the AGC will remainat its last setting level. Refer to Chapter 8 for the proper configuration setting.NOTEFor full-duplex point-to-point applications, there is no differencebetween the Controlled and Continuous AGC modes ofoperation.
MX-9325FUNCTIONAL DESCRIPTION4-214.4.9.2.9 V.54 Loopback DiagnosticsThe V.54 loops are activated either manually from the RS-232 Modem front panel or via pins 18 and 21 of theRS-232 data interface. The circuits will provide Local Analog loopback, Local Digital Loopback and RemoteDigital loopback. Either the front panel pushbuttons or the data interface controls may be disabled via jumpersettings. Refer to Chapter 8 for proper configuration settings.NOTEThe V.54 delay jumper must be set to OFF to work forasynchronous 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 featurecan 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 DistributionThe RS-232 Modem interfaces the extender unit chassis via a 44-pin card edge connector. The card receives DCpower from the chassis rear panel via the edge connector. The corresponding 5-pin terminal block and 25-pinconnector provide the external interfaces to all signals.
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MX-9325TROUBLESHOOTING5-1CHAPTER 5FAULT ISOLATION5.1 INTRODUCTIONThis chapter provides procedures for fault isolation to the assembly level.5.1.1 Scope of this ChapterSee Figure 5-1. The procedures presented in this chapter assume that the MX-9325 Transceiver is suspected tohave a fault. The maintenance power-on procedure is used to find a fault indication with the unit. If there is a faultwithout a BIT code displayed, use the non-BIT fault isolation procedures. If there is a BIT fault code, generatedby running BIT or during normal operation, use the BIT fault isolation procedure. If a TAP is referenced, performthose procedures. If the problem is not corrected using any of these procedures, use the support data in Chapter 7based on the functional area of the fault.Figure 5-1. Fault Isolation Process Used in this ChapterPROBLEMREPORTEDMAINTENANCEPOWER-ON(PARAGRAPH 5.2.1)BIT FAULT(PARAGRAPH 5.2.2)NON-BIT FAULT(PARAGRAPH 5.2.3)TROUBLESHOOT USINGTHEORY AND SUPPORTDATA (CHAPTER 7)RUN-TIME FAULT(PARAGRAPH 5.2.2)TROUBLESHOOT USINGTABLES OR TAPsREMOVE AND REPLACESUSPECTED ASSEMBLYAND REPEAT THIS PROCESS
MX-9325TROUBLESHOOTING5-25.2 FAULT ISOLATION PROCEDURESFault isolation begins with performing the maintenance power-on procedure. The maintenance power-onprocedure references the non-BIT and BIT fault isolation procedures. Refer to Paragraph 5.2.1.5.2.1 MX-9325 Transceiver Maintenance Power-On ProcedureTable 5-1 is the procedure to power on the MX-9325 Transceiver UUT and execute BIT.Table 5-1. Maintenance Power-On ProcedureStep Observe Referencea. Connect a 50-Ohm RF attenuator torear panel connector J104.b. Place PC or terminal POWER switchin ON position. The PC boots or terminal powerson. Refer to PC or terminal operationinstructions.c. If using a PC, run the desired terminalemulation program. The PC runs the terminal emulationprogram. Refer to software operation instructions for more information.d. Ensure that the terminal emulationsoftware or terminal is correctly configured.Refer to Chapter 3, Paragraph 3.2.1.Also refer to terminal or emulationsoftware operation instructions.e. Place POWER switch on MX-9325Transceiver front panel in the ONposition.The PC or terminal displays thepower-up screen. See Figure TBD.If the PC or terminal does not display the power-up screen, referto the non-BIT troubleshootingprocedures in Paragraph 5.2.3.f. PC or terminal keyboard, type BITcommand: bit v <enter>.If a BIT fault is displayed on the PCor terminal as a result of the BITcommand, write down the faultcode.Refer to the BIT troubleshootingprocedures in Paragraph 5.2.2.g. PC or terminal keyboard, type testcommand: tst <enter>.If no errors occur during BIT, con-tinue operating the radio system inan attempt to generate a run-timefault.If a run-time fault is generated, refer to the non-BIT troubleshoot-ing procedures in Paragraph 5.2.3.If a BIT fault is generated, refer tothe BIT troubleshooting proceduresin Paragraph 5.2.2.If no fault is generated, return radiosystem to operational readiness.5.2.2 MX-9325 Transceiver BIT Fault IsolationThe 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 <enter> command. To Display a text (verbose) descriptionof the BIT fault codes use the bit v <enter> command. Refer to Table 5-2 for a complete listing of BIT faultcodes.Table 5-2 lists all the BIT fault codes, fault text, and the suspected cause of the fault. The fault codes listed inTable 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 binaryvalue will be combined to be represented as an equivalent hexadecimal readback.
MX-9325TROUBLESHOOTING5-3Example 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 hasbeen eliminated. If the actions do not correct the problem, proceed to the troubleshooting index in Paragraph7.6.2.Table 5-2. BIT Fault Codes, Descriptions, and Suspected AssembliesFault Code Fault Text Suspect SRU (Prioritized)00000001 Low Voltage Power Supply Failure AC Input Voltage,A1A4, A1A600000002 28 Volt Power Supply Failure AC Input Voltage, A1A4,A1A600000004 Directional Coupler Failure A1A5, A1A2, Antenna00000008 Power Amplifier Failure A1A4,A1A300000010 Exciter Failure A1A3, A1A4, A1A6, A1A200000020 Receiver Failure A1A7, A1A4, A1A6, A1A200000040 Digital Processor Failure A1A2, A1A4, A1A600000080 Unused Unused00000100 Power Amplifier Heat Sink Low Temp A1A4, A1A200000400 Cooling Fan B N/A00000200 Power Amplifier Heat Sink High Temp A1A4, A1A6, A1A200000800 Cooling Fan A N/A00001000 Rx Sensitivity Low Antenna, A1A5, A1A7, A1A200002000 Power Supply Heat Sink Low Temp A1A4, A1A200004000 Power Supply Heat Sink High Temp A1A4, A1A200008000 System Boot Error A1A25.2.3 Non-BIT Fault IsolationTable 5-3 is a list of the non-BIT fault symptoms. Next to the symptom observed is a reference to therecommended action to take. When the recommended action is to remove and replace assemblies, replace theassemblies one at a time in the order listed, testing the UUT (repeat Paragraph 5.2.1) after replacing eachassembly. Chapter 6, Table 6-1, references the assembly removal and replacement procedures. When therecommended action is to perform a TAP, proceed to the specified TAP. Refer to Paragraph 5.2.5 for more TAPinformation. If the actions do not correct the problem, proceed to the fault isolation support data in Chapter 7.Table 5-3. Non-BIT Fault SymptomsSymptom Observed ProbableArea Suggested SRUMX-9325 Transceiver does not power up. Power Supply Proceed to TAP-1. Paragraph 5.2.5.No RF output Transmit Signal Path A1A2, A1A3, A1A4, A1A5Weak RF output Transmit Signal Path A1A2, A1A3, A1A4, A1A5No Receiver Signal Receive Signal Path A1A5, A1A8, A1A7, A1A2Weak Receiver Signal Receive Signal Path A1A5, A1A8, A1A7, A1A2Loss of PC/terminal control Data Signal Path A1A2, PC/Terminal
MX-9325TROUBLESHOOTING5-45.2.4 VHF Extender Unit DiagnosticsThe VHF Extender Unit has diagnostics capabilities to perform local analog loopback or local and remote digitalloopback. The loopbacks can be manually activated from a front panel pushbutton switch or remotely via acontrol 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, CorrectiveMaintenance for removal and replacement procedures. Refer to Chapter 2, Paragraph 2.2 for front panel controland indicator descriptions.Table 5-4. VHF Extender Unit Diagnostic TestDiagnostic Pushbutton Switch Observe Suggested SRUEIA-530 Modem DIG TEST LED Blinks Red EIA-530 Modem, Intersite linesEIA-530 Modem ANA TEST LED Blinks Red EIA-530 Modem, Intersite linesEIA–530 Modem REM TEST LED Blinks Red EIA-530 Modem, Intersite linesEIA-530 Modem PATT TEST LED Blinks RedERR LED Blinks Yellow EIA-530 Modem, Intersite linesDiscrete I/O Card (no pushbutton present) ALM Lights Red Discrete I/O Card, Intersite linesRS-232 Modem DIG TEST LED Blinks Red RS-232 Modem, Intersite linesRS-232 Modem ANA TEST LED Blinks Red RS-232 Modem, Intersite linesRS-232 Modem REM TEST LED Blinks Red RS-232 Modem, Intersite lines5.2.5 TAPsTAPs 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 withoutthe use of tools or test equipment. If the initial checks do not solve the problem, continue by performing theprocedure itself. Assembly and module removal and replacement procedures are located in Chapter 6, CorrectiveMaintenance. If the problem still exists after completing the TAP, proceed to the fault isolation support data inChapter 7.
MX-9325TROUBLESHOOTING5-5TAP-1: NO POWERThe 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 ACpower switch is in the on position.PROCEDURECheck 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 VdcAre all voltages present?YNAre some of these voltages present?YNDisconnect power connector A1A4A2J3 toA1A4A2 Power Supply Assembly. Checkcable for the following voltages:87 to 230 Vac – Pins 3 and 4Is voltage present?YNDisconnect power connectorA1A4A2J3 to A1A4A2 PowerSupply Assembly. Check cablefor the following voltages:87 to 230 Vac – Pins1 and 2Is voltage present?YNRemove and replaceAC input cable.Return unit tooperation.Remove and replace CB1 onFront Panel Assembly. Returnunit to operation.Remove and replace A1A4 Assembly.Return unit to operation.Remove and replace A1A6 Assembly. Return unit tooperation.Remove and replace A1A2 Assembly. Return unit to operation.
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MX-9325MAINTENANCE6-1CHAPTER 6MAINTENANCE6.1 INTRODUCTIONThis chapter provides the maintenance procedures for the MX-9325 Transceiver. Paragraph 6.2 providespreventive maintenance procedures. Paragraph 6.3 provides scheduled maintenance procedures. Paragraph 6.5provides corrective maintenance which includes adjustment and alignment procedures and assembly removal andreplacement procedures. The MX-9325 Transceiver assemblies are listed in Table 6-1 with a reference to thecorresponding removal and replacement procedure paragraph. For parts list and family tree information, refer toChapter 7, Paragraph 7.4.Table 6-1. MX-9325 Transceiver Assembly Removal and Replacement Paragraph ReferencesSRU Name ParagraphReferenceMX-9325 Transceiver 6.5.1A1A2 Digital PWB Assembly 6.5.2A1A3 Exciter PWB Assembly 6.5.3A1A4 Heatsink Assembly 6.5.4A1A5 Low Pass Filter & Directional Coupler Assembly 6.5.5A1A6 Low Voltage Power Supply Assembly 6.5.6A1A7 Receiver PWB Assembly 6.5.7A1A8 Helical Filter Assembly 6.5.8Table 6-2. VHF Extender Unit Assembly Removal and Replacement Paragraph ReferencesSRU Name ParagraphReferenceVHF Extender Unit 6.5.9VHF Extender Unit Circuit Card 6.5.10NOTEIf a product has been fielded for several years, there is thepossibility of firmware incompatibility between new replacementassemblies and an older unit. If unsure of compatibility, contactHarris RF Communications customer service department (tel:716-244-5830).
MX-9325MAINTENANCE6-26.2 PREVENTIVE MAINTENANCENo periodic (preventive) maintenance or electronic adjustments are required for the MX-9325 Transceiver orVHF Extender Unit. All that is recommended is periodic cleaning and inspection.6.2.1 List of Preventive Maintenance ProceduresTable 6-3 lists the preventive maintenance procedures recommended for the MX-9325 Transceiver and VHFExtender 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 ProceduresParagraphNumber Preventive MaintenanceProcedure Periodicity6.2.2 Clean and inspect chassis exterior. Semi-annual6.2.3 Clean and inspect chassis interior. During repair6.2.2 Clean and Inspect Chassis ExteriorRefer to Chapter 7, Paragraph 7.3 for a list of tools and materials. Perform the following procedure to clean andinspect the MX-9325 Transceiver exterior:WARNINGFailure to remove electrical connections from the unit can causeinjury or death to personnel.NOTEWhen 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:1. Physical damage2. Loose hardware including knobs and switches3. Accumulated dust and/or other foreign matter
MX-9325MAINTENANCE6-3d. 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 InteriorRefer to Chapter 7, Paragraph 7.3 for a list of tools and materials. Perform the following procedure to clean andinspect the MX-9325 Transceiver interior before and during repair:WARNINGFailure to remove electrical connections from the unit couldcause injury or death.a. Use a flat-tip screwdriver (Item 1) to remove the (9) screws that secure MX-9325 Transceiver top coverto 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:1. Foreign matter2. Discolored or scorched components3. Loose or damaged circuit cards or connectors4. Moisture5. Stripped threaded holesd. Replace MX-9325 Transceiver top cover. Use a flat-tip screwdriver (Item 1) to replace the nine (9) screwsthat secure exciter top cover to chassis.6.3 SCHEDULED MAINTENANCEThe following provides scheduled maintenance for the MX-9325 Transceiver. Scheduled maintenance should beperformed annually upon completion of a service task. All scheduled maintenance procedures should pass testbefore the MX-9325 Transceiver is put back into operation.6.3.1 Scheduled Maintenance Procedure ListTable 6-4 lists the scheduled maintenance procedures recommended for the MX-9325 Transceiver. The table isdivided 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.).
MX-9325MAINTENANCE6-4Table 6-4. Scheduled Maintenance Test ProceduresParagraphNumber Scheduled MaintenanceTest Procedure Periodicity6.4.1 BIT Annually6.4.2 LED Test Annually6.4.3 Rx Sensitivity and Distortion Annually6.4.4 Tx Power Output and Distortion Annually6.4.5 Tx 2:1 VSWR Load Annually6.4.6 Tx Time–out Annually6.4.7 Tx Spurious Suppression Annually6.3.2 Recommended Test EquipmentRefer to Chapter 7, Table 7-2 for a list of recommended test equipment to perform scheduled maintenance test procedures.NOTEMost test functions can be performed by a communications testset, or service monitor, which performs the combined functionsof RF and audio signal generator, frequency counter, modulationanalyzer, and RF wattmeter. Service monitors are typicallyequipped with an input attenuator pad/dummy load that allowsthe full output of the MX-9325 Transceiver to be coupleddirectly to the instrument. If this feature is not provided, aseparate pad/dummy load will be required. Separate instrumentscan 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.NOTEThe frequency measuring instrument (counter, etc.) must have ahigh stability time base (better than 0.1 ppm) to ensure accuracy.Do not attempt to set the reference frequency unless the testequipment conforms.6.4 SCHEDULED MAINTENANCE PROCEDURESThe following paragraphs contain information about tests to be performed on a MX-9325 Transceiver as part ofscheduled maintenance.6.4.1 MX-9325 Transceiver BIT TestThe following paragraphs provide instructions for performing the MX-9325 Transceiver BIT test as part ofscheduled maintenance.
MX-9325MAINTENANCE6-56.4.1.1 Required EquipmentThe following equipment is required to perform the power output test:•PC or ASCII Terminal6.4.1.2 Test ProcedurePerform 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 occurredsince 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.Figure 6-1. MX-9325 Transceiver BIT Test Set UpPC/TERMINALMX-9325 TRANSCEIVERUNIT UNDER TESTFRONT PANELMAINTENANCECONNECTOR9325-012
MX-9325MAINTENANCE6-66.4.2 MX-9325 Transceiver LED TestThe following paragraphs provide instructions for performing the MX-9325 Transceiver LED test as part ofscheduled maintenance.6.4.2.1 Required EquipmentThe following equipment is required to perform the MX-9325 Transceiver LED test:•Signal Generator•PC or ASCII Terminal6.4.2.2 Test ProcedurePerform 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 commandinformation.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.
MX-9325MAINTENANCE6-7Figure 6-2. MX-9325 Transceiver LED Test Set UpSIGNAL GENERATORPC/TERMINALJ5ANTENNAMX-9325 TRANSCEIVERUNIT UNDER TEST9325-013FRONT PANELMAINTENANCECONNECTOR6.4.3 Receive Sensitivity and Distortion TestPerforms 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 partof scheduled maintenance.6.4.3.1 Required EquipmentThe following equipment is required to perform the Receiver Sensitivity and Distortion test:•RF signal generator•30 dB attenuator6.4.3.2 Test ProcedurePerform the following procedure to test the MX-9325 Transceiver: Receive Sensitivity and Distortiona. Set up the radio system as shown in Figure 6-3. Refer to Chapter 3, Paragraph 3.2.4 for commandinformation.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 127.500MHz .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.
MX-9325MAINTENANCE6-8g. Adjust the signal generator to –60.0 dBm (at the antenna port of the MX-9325 Transceiver) and measurethe 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.Figure 6-3. MX-9325 Transceiver Receive Sensitivity and Distortion Test Set UpSIGNAL GENERATORPC/TERMINAL9325-014MX-9325 TRANSCEIVERUNIT UNDER TESTFRONT PANELMAINTENANCECONNECTORFRONT PANELACCESSORYPORT(J9-3)AUDIO ANALYZERAUDIO IN HIJ5 ANTENNAPORT 30 DB ATTENUATOR6.4.4 Transmit Power Output and DistortionPerforms a series of tests of transmit power output level, percent modulation, and distortion at various carrierfrequencies.The following paragraphs provide instructions for performing the Transmit Power Output test as part of scheduledmaintenance.6.4.4.1 Required EquipmentThe following equipment is required to perform the percent modulation test:•30 dB, 50-Ohm Attenuator•RF Power Meter•Modulation Analyzer•PC or ASCII Terminal6.4.4.2 Test ParametersThe following are the power outputs to be tested:•Power Output at high power mode, 25 Watts ±5%
MX-9325MAINTENANCE6-9•Power Output at medium power mode, 10 Watts ±5%•Power Output at low power mode, 2 Watts ±5%6.4.4.3 Test ProcedureThe Transmit Power Output and Distortion Tests are done at high power mode using carrier frequencies at118.0 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 carrierfrequency 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 commandinformation.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 operatingfrequency 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 cableloss 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 andverify measurement is ±5% at 50% AM modulation.i. On the audio analyzer, measure the distortion of the demodulated audio output of the modulation analyzerand 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, andA1A2 Digital PWB Assembly.
MX-9325MAINTENANCE6-10Figure 6-4. MX-9325 Transceiver Transmit Power Output and Distortion Test Setup 9325-016PC/TERMINALJ5 30 dBATTENUATORAUDIOANALYZERMODULATIONANALYZERMX-9325 TRANSCEIVERUNIT UNDER TESTFRONT PANELMAINTENANCECONNECTORPOWERMETER6.4.5 MX-9325 Transceiver VSWR LoadVerifies performance of the MX-9325 Transceiver into a load with a 2:1 VSWR and verifies the radio’s internaldirectional coupler by reading back the forward and reflected power.The following paragraphs provide instructions for performing the MX-9325 Transceiver VSWR load test as partof scheduled maintenance.6.4.5.1 Required EquipmentThe 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
MX-9325MAINTENANCE6-116.4.5.2 Test ProcedurePerform the following procedure to test the VSWR Load of the Transceiver:NOTEThe 2:1 load is constructed by connecting a 50 ohm attenuatorand a 50 ohm load together with a BNC T. To present aneffective 25 ohm load at the antenna connector, the total cablelength (including switching) from the antenna port to the T mustbe 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 commandinformation.b. Refer to Paragraph 6.4.4. Repeat the Transmit Power Output and Distortion test procedure using a carrierfrequency 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 <enter> command.d. On PC/terminal, read the reverse power of the transmission using the rpw <enter> command.Figure 6-5. MX-9325 VSWR Load Test Set Up2205-016PC/TERMINALJ5 30 dBATTENUATORAUDIOANALYZERMODULATIONANALYZERMX-9325 TRANSCEIVERUNIT UNDER TESTFRONT PANELMAINTENANCECONNECTORPOWERMETER50 OHMLOADAPPROXIMATECABLE LENGTH1.09 METERS"BNCTCONNECTOR
MX-9325MAINTENANCE6-126.4.6 MX-9325 Transceiver Transmit Time-Out testVerifies the MX-9325 Transceivers continuous key timer. The time-out specified is the number of seconds theMX-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 Testas part of scheduled maintenance.6.4.6.1 Required EquipmentThe following equipment is required to perform the MX-9325 Transceiver Transmit Time-Out Test:•RF Power Meter•50 Ohm Load•PC or ASCII Terminal6.4.6.2 Test ProcedurePerform 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 commandinformation.b. On PC/terminal, enter tim 3 command to set the transmitter continuous key time–out interval to 3seconds.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 themeasurement is 10 Watts ±5%.f. After keying for a total of 4 seconds, measure the power output on the power meter and verify themeasurement 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.
MX-9325MAINTENANCE6-13PC/TERMINALJ5MX-9325 TRANSCEIVERUNIT UNDER TESTFRONT PANELMAINTENANCECONNECTORPOWERMETER50 OHMLOADFigure 6-6. MX-9325 Transceiver Transmit Time–out2205-0336.4.7 MX-9325 Transceiver Transmit Spurious SuppressionPerforms a series of spurious suppression tests at various transmit frequencies. For each frequency, the MX-9325Transceiver UUT will be keyed and the frequency spectrum from 118.0 to 137.0 MHz will be analyzed for spursthat may indicate improper circuit operation of the PA, exciter, power supply, etc.The following paragraphs provide instructions for performing the MX-9325 Transceiver Transmit SpuriousSuppression Test as part of scheduled maintenance.6.4.7.1 Required EquipmentThe following equipment is required to perform the MX-9325 Transceiver Transmit Spurious Suppression Test:•30 dB Attenuator•Spectrum Analyzer•PC or ASCII Terminal6.4.7.2 Test ProcedureThe MX-9325 Transceiver Transmit Spurious Suppression Tests are done at a 25 Watt power output usingoperating 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:
MX-9325MAINTENANCE6-14NOTEThe suppression level, specified as a positive value, representsthe amount of suppression below the carrier amplitude. Forexample 60 dB of suppression indicates that the amplitude of thespur 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 commandinformation.b. Use PC/terminal enter frq command to set the frequency of the MX-9325 Transceiver to desired carrierfrequency.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 thecarrier 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 ofthe carrier frequency.h. If any spurs are within 2 MHz of each other, assume that this is a single spur with a wide bandwidth andrecord 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.PC/TERMINALJ5MX-9325 TRANSCEIVERUNIT UNDER TESTFRONT PANELMAINTENANCECONNECTORSPECTRUMANALYZER30 dBATTENUATORFigure 6-7. MX-9325 Transceiver Transmit Spurious Suppression Test Set up2205-034
MX-9325MAINTENANCE6-156.5 CORRECTIVE MAINTENANCEThe following provides corrective maintenance procedures consisting of adjustments and alignments, and removaland replacement procedures.6.5.1 MX-9325 Transceiver Removal and Replacement ProcedureRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 6-8 for typical MX-9325 Transceiver rackmounting. The following paragraphs provide instructions for the removal and replacement of the MX-9325Transceiver.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.1.1 MX-9325 Transceiver RemovalPerform 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 ACPOWER 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-9325Transceiver 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 allother 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 forwarduntil 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 ReplacementPerform 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 otherrequired electrical connections to the MX-9325 Transceiver rear panel connectors.
MX-9325MAINTENANCE6-16d. 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-9325Transceiver front panel to the equipment rack.f. Apply AC power to equipment rack. Set the equipment rack POWER ON switch to the ON position. Setthe MX-9325 Transceiver POWER ON switch to the ON position.
MX-9325MAINTENANCE6-17Figure 6-8. MX-9325 Transceiver Rack Mounting Details9325-017LIFT UP TO UNLOCK SLIDE MECHANISM (BOTH SIDES OF UNIT SIMULTANEOUSLY).DISCONNECT CABLINGBEFORE REMOVING UNIT.UNIT SHOWN INFULLY EXTENDEDPOSITION.SLIDE LOCKS ONBOTH SIDESFRONT PANELSCREWS (4 PLACES)SCREWS(8 PLACES)
MX-9325MAINTENANCE6-186.5.2 A1A2 Digital PWB AssemblyRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. Thefollowing paragraphs provide instructions for the removal and replacement of A1A2 Digital PWB Assembly.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.2.1 A1A2 Digital PWB Assembly RemovalPerform 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 ACPOWER 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:•A1A2J11•A1A2J3•A1A2J12•A1A2J28•A1A2J20•A1A2J16e. Remove the following RF connectors•A1A2J22•A1A2J21•A1A2J18f. Use a No. 1 cross-tip screwdriver (Item2) and loosen 14 captive screws that secure the A1A2 DigitalPWB Assembly.
MX-9325MAINTENANCE6-19g. 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 referenceconnectors to clear the front panel cutouts. Then continue to lift the A1A2 Digital PWB Assembly out ofthe chassis.6.5.2.2 A1A2 Digital PWB Assembly ReplacementPerform 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 referenceconnectors 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 DigitalPWB Assembly.e. Connect the following RF connectors:•A1A2J22•A1A2J21•A1A2J18f. Connect the following connectors:•A1A2J11•A1A2J3•A1A2J12•A1A2J28•A1A2J20•A1A2J16g. 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.
MX-9325MAINTENANCE6-206.5.3 A1A3 Exciter PWB Assembly Removal and ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. Thefollowing paragraphs provide instructions for the removal and replacement of A1A3 Exciter PWB Assembly.6.5.3.1 A1A3 Exciter PWB Assembly RemovalPerform 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 ACPOWER 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 tochassis. Remove bottom cover.d. Disconnect the following connectors:•A1A3J3•A1A3J4e. Remove the following RF cables:•A1A3J1•A1A3J2f. Use a No. 1 cross-tip screwdriver (Item 2) to loosen eight (8) captive screws that secure A1A3 ExciterPWB Assembly to the chassis.g. Use a No. 2 cross-tip screwdriver (Item 1) to loosen two (2) captive screws that secure A1A3 ExciterPWB Assembly into the chassis.h. Remove A1A3 Exciter PWB Assembly from chassis.6.5.3.2 A1A3 Exciter PWB Assembly ReplacementPerform 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 ExciterPWB Assembly into the chassis.c. Use a No. 1 cross–tip screwdriver (Item 2) to tighten eight (8) captive screws that secure A1A3 ExciterPWB Assembly to the chassis.d. Replace the following RF connectors:•A1A3J1•A1A3J2
MX-9325MAINTENANCE6-21e. Replace the following connectors:•A1A3J1•A1A3J2f. 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 tochassis.h. Refer to Paragraph 6.5.1. Install the MX-9325 Transceiver into the equipment rack.6.5.4 A1A4 Heatsink Assembly Removal and ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figures 7-2 and 7-4 for hardware and componentlocations. The following paragraphs provide instructions for the removal and replacement of A1A4 HeatsinkAssembly.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.4.1 A1A4 Heatsink Assembly RemovalPerform 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 ACPOWER 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 tochassis. Remove top cover.d. Use a flat-tip screwdriver (Item 6) to loosen the tem (10) captive screws that secure the bottom coverMP2 to the chassis. Remove the bottom cover.e. With MX-9325 Transceiver placed bottom side up disconnect the following connectors:•A1A4A1J4•A1A4A1J5•A1A4A2J2
MX-9325MAINTENANCE6-22•A1A4A2J3•A1A4A2J2•A1A4A1J3f. Remove the following RF connectors from:•A1A5J2•A1A4A1J1g. With the MX-9325 Transceiver placed top side up remove the following connectors from:•A1A2J11•A1A2J3h. Remove the following RF connector from:•A1A4A1J2i. 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 ReplacementPerform 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 HeatsinkAssembly onto chassis.c. Use a No. 2 cross-tip screwdriver (Item 1) to replace one (1) ground screw onto A1A4 HeatsinkAssembly.d. With MX-9325 Transceiver placed top side up, connect the following RF connector:•A1A4A1J2e. Connect the following connectors:•A1A2J11•A1A2J3f. With the MX-9325 Transceiver placed bottom side up, connect the following RF connectors:•A1A5J2•A1A4A1J1
MX-9325MAINTENANCE6-23g. Connect the following connectors:•A1A4A1J4•A1A4A1J5•A1A4A2J2•A1A4A2J3•A1A4A2J2•A1A4A1J3h. 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 ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. Thefollowing paragraphs provide instructions for the removal and replacement of A1A5 Low Pass Filter andDirectional Coupler Assembly removal and replacement.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.5.1 A1A5 Low Pass Filter and Directional Coupler Assembly RemovalPerform the following procedure to remove A1A5 Low Pass Filter and Directional Coupler Assembly from theMX-9325 Transceiver:a. Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver ACPOWER 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
MX-9325MAINTENANCE6-24•A1A5J6e. Disconnect RF connector from A1A5J4.f. Use a 5/16-inch combination wrench and remove the following RF connectors:•A1A5J3•A1A5J1g. 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 ReplacementPerform the following procedure to replace A1A5 Low Pass Filter and Directional Coupler Assembly in theMX-9325 Transceiver:a. Place the A1A5 Low Pass Filter and Directional Coupler Assembly into the MX-9325 TransceiverChassis.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•A1A5J1d. Connect RF connector to A1A5J4.e. Connect the following connectors:•A1A5J5•A1A5J6f. 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 ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. Thefollowing paragraphs provide instructions for the removal and replacement of A1A6 Low Voltage Power SupplyAssembly.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.
MX-9325MAINTENANCE6-25CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.6.1 A1A6 Low Voltage Power Supply Assembly RemovalPerform the following procedure to remove A1A6 Low Voltage Power Supply Assembly from the MX-9325Transceiver:a. Set the equipment rack POWER ON switch to the OFF position. Set the MX-9325 Transceiver ACPOWER 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•A1A6J1f. Use a No.1 cross-tip screwdriver (Item 2) to loosen two (2) captive screws that secure the A1A6 Lowvoltage 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 ReplacementPerform the following procedure to replace A1A6 Low Voltage Power Supply Assembly in the MX-9325Transceiver: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 LowVoltage Power Supply Assembly.
MX-9325MAINTENANCE6-26d. Connect the following connectors:•A1A6J5•A1A6J9•A1A6J8•A1A6J7•A1A6J4•A1A6J1e. 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 ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. Thefollowing paragraphs provide instructions for the removal and replacement of A1A7 Receiver PWB Assembly.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.7.1 A1A7 Receiver PWB Assembly RemovalPerform 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 ACPOWER 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 tochassis. Remove bottom cover.d. Disconnect the following connectors:•A1A7J3•A1A7J4
MX-9325MAINTENANCE6-27e. Disconnect the following RF connectors:•A1A7J1•A1A7J5f. Use a No. 1 cross-tip screwdriver to loosen eight (8) captive screws that secure the A1A7 Receiver PWBAssembly.g. Remove A1A7 Receiver PWB Assembly from chassis.6.5.7.2 A1A7 Receiver PWB Assembly ReplacementPerform 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 PWBAssembly.c. Connect the following RF connectors:•A1A7J1•A1A7J5d. Connect the following connectors.•A1A7J3•A1A7J4e. Use a flat-tip screwdriver (Item 6) to loosen the ten (10) captive screws that secure bottom cover tochassis. 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 ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-2 for hardware and component locations. Thefollowing paragraphs provide instructions for the removal and replacement of A1A8 Helical Filter Assembly.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.
MX-9325MAINTENANCE6-286.5.8.1 A1A8 Helical Filter Assembly RemovalPerform 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 ACPOWER 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 tochassis. Remove bottom cover.d. Use 5/16-inch combination wrench to remove the two (2) RF connectors from both sides of A1A8 HelicalFilter Assembly.e. Use no. 2 cross-tip screwdriver (Item 1) to remove two (2) screws that secure A1A8 Helical FilterAssembly to chassis.f. Remove A1A8 Helical Filter Assembly from chassis.6.5.8.2 A1A8 Helical Filter Assembly ReplacementPerform 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 FilterAssembly to chassis.c. Use a 5/16-inch combination wrench to replace the two (2) RF connectors on both side of A1A8 HelicalFilter Assembly.d. Use a flat-tip screwdriver (Item 6) to tighten the ten (10) captive screws that secure bottom cover tochassis.e. Refer to Paragraph 6.5.1. Replace the MX-9325 Transceiver into the equipment rack.6.5.9 Extender Unit Removal and Replacement ProceduresRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 6-8 for typical extender unit rack mounting. Thefollowing paragraphs provide instructions for the removal and replacement of extender unit.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.
MX-9325MAINTENANCE6-296.5.9.1 Extender Unit RemovalPerform 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 ACPOWER 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 Unitfront 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 otherconnections 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 forwarduntil 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 ReplacementPerform 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 requiredelectrical 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 ExtenderUnit 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 ReplacementRefer to Chapter 7, Paragraph 7.3 for a list of tools. See Figure 7-3 for hardware and component locations. Onlyone procedure is needed for all types of circuit cards. The following paragraphs provide instructions for theremoval and replacement of all VHF Extender Unit circuit cards.WARNINGFailure to remove electrical connections from the unit couldcause injury or death.
MX-9325MAINTENANCE6-30CAUTIONFailure to take the proper precautions may damage the assemblydue to static discharge.6.5.10.1 VHF Extender Unit Circuit Card RemovalPerform 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 extenderunit.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 ReplacementPerform 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 connectorhas 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.
MX-9325SUPPORT DATA7-1CHAPTER 7SUPPORT DATA7.1 INTRODUCTIONThis chapter contains reference data for fault isolation and maintenance of the MX-9325 Transceiver. The dataconsists of suggested tools and test equipment, parts lists, assembly component references, troubleshootingindexes, chassis connector data, and interconnect diagrams.7.2 ADDITIONAL SUPPORTTo ensure our customers have continued success with our products, Harris RF Communications provides logisticsplanning, spares, tools, technical documentation, training, product service, and field service. For any of theseservices contact 716-244-5830.7.3 TOOLS, MATERIALS, AND TEST EQUIPMENTTable 7-1 lists the tools and materials for the procedures in this book. The first column, Item, provides the itemnumber for the tools referenced in the procedures. Table 7-2 lists the suggested test equipment for the proceduresin 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 proceduresand can be used to obtain available test equipment. The most important factor is that the test equipment usedneeds to be calibrated and accurate.Table 7-1. Tools and MaterialsItem Description1No. 2 Cross-Tip Screwdriver2No. 1 Cross-Tip Screwdriver33/16-Inch Nutdriver45/16-Inch combination Wrench511/32-Inch Combination Wrench6Six Inch Flat-Tip Screwdriver7Standard Needle–noses Pliers8Wire Cutters9Miniature Flat-Tip Screwdriver10 Lint-Free Cloth11 Service-Vacuum Cleaner (ESD Safe)
MX-9325SUPPORT DATA7-2Table 7-2. Test EquipmentEquipment Description Testing ParametersRF Power Meter, with 50 W, 100–250 MHz Element 25 WattsRF Attenuator, 30 dB, 50 Ohm, 50 Watt minimum 50 Ohm load; 30 dB attenuation oftransmitter RF output signal.Frequency Counter 117.975 to 137.000 MHzDC Voltmeter/Digital Multimeter +5 Vdc to +30Vdc85 Vac to 265 VacSpectrum Analyzer 118.000 MHz to 137.000 MHzAudio Analyzer Sensitivity SINAD > 10 dB, Distortion < 5.0%Signal Generator AM modulation 1 kHz tone at -99dBm, 99% modulation at 118 MHz to137 MHz RF.PC Terminal (ASCII) or personal computer with Terminal Emulation Software Operational Commands using RS 232 protocol.7.4 PARTS LISTSThe 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 relationshipbetween 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 AssembliesTable 7-3 list the assemblies in the MX-9325 Transceiver. Figure 7-2 shows the locations of the assemblies withinthe MX-9325 Transceiver. These items are called out in the fault isolation and maintenance procedures.Table 7-3. MX-9325 Transceiver AssembliesRef. Des. Item Name PartNumber Figure NumberA1 MX-9325 Transceiver 12007–1000 Figure 7-2Sheet 1 or 2A1A2 Digital PWB Assembly 12007-2500 Figure 7-2,Sheet 1A1A3 Exciter PWB Assembly 12007-3000 Figure 7-2,Sheet 2A1A4 Heatsink Assembly 12007-4000 Figure 7-2,Sheet 1A1A5 Low Pass Filter & Directional Coupler Assembly 12007-4200 Figure 7-2,Sheet 1A1A6 Low Voltage Power Supply Assembly 12007-4600 Figure 7-2,Sheet 1A1A7 Receiver PWB Assembly 12007-5000 Figure 7-2,Sheet 2A1A8 Helical Filter Assembly 12007-5600 Figure 7-2,Sheet 2A2 (Optional) Extender Unit 12007-6000 Figure 7-3A2A1 Discrete I/O Card 12007-6100 Figure 7-3
MX-9325SUPPORT DATA7-3Table 7-3. MX-9325 Transceiver Assemblies – ContinuedRef. Des. Item Name PartNumber Figure NumberA2A2 EIA- 530 Modem 12007-6050 Figure 7-3A2A3 RS-232 Modem 12007-6151 Figure 7-37.4.2 Mechanical PartsTable 7-4 lists the MX-9325 Transceiver mechanical parts. Figure 7-2 shows the locations of the mechanicalparts. 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 PartsRef. Des. Item Name Part Number Figure NumberMP1 Chassis Top Cover 12007-1104 Figure 7-2,Sheet 1MP2 Chassis Bottom Cover 12007-1104 Figure 7-2,Sheet 27.4.3 Attaching HardwareTable 7-4 lists the MX-9325 Transceiver attaching hardware. Figure 7-2 shows the locations of the mechanicalparts. 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 HardwareLetter Code Item Name Part Number Figure NumberAPan Head Screw, StainlessSteel, 8-32 x 1-1/4 MS51957-81 Figure 7-2,Sheet 1B Lockwasher MS35338-139 Figure 7-2Sheet 1C Flatwasher MS15795-809 Figure 7-2Sheet 1DPan Head Screw, StainlessSteel, 8-32 MS51958-66 Figure 7-2,Sheet 1EPan Head Screw, StainlessSteel,Philip, 6-32 x1/2 H21-0001-108 Figure 7-2,Sheet 1FScrew, Hex, Stainless Steel,4-40 Figure 7-2,Sheet 1GFlat Head Screw, StainlessSteel, 8-32 x 5/16 MS-24693-C27 Figure 7-2Sheet 27.4.4 Ancillary KitTable 7-4 lists the MX-9325 Transceiver ancillary kit items. These items are generally used during installation.
MX-9325SUPPORT DATA7-4Table 7-6. MX-9325 Transceiver Ancillary Kit ItemsQuantity. Item Name Part Number1MX-9325 Transceiver Intermediate Maintenance Manual 10515-0152-43001MX-9325 Transceiver Level IV Data Package 10515-0152-44001AC Power Cord W80-0029-001
MX-9325SUPPORT DATA7-5/7-6A2DIGITAL PWBASSEMBLY 12007-2500A3EXCITER PWB ASSEMBLYA4HEATSINKASSEMBLYA4A1POWER AMPLIFIER ASSEMBLYA4A228 VDC POWER SUPPLY ASSEMBLY02-6014A01MX-9325MULTIMODE TRANSCEIVER12007-3000 12007–400012007-4100A5 LOW PASS FILTER&DIRECTIONAL COUPLERASSEMBLY12007–4200SOFTWARETBDFigure 7-1. Tranceiver Family TreeA4A3REAR PANEL CONNECTOR HUSINGASSEMBLY04–5133A03A6LOW VOLTAGEPOWER SUPPLY ASSEMBLY12007–4600A7RECEIVER PWBASSEMBLY12007–5000EIA–530MODEMA8HELICAL FILTERASSEMBLY12007–5600OPTIONALEXTENDER UNIT12007–6000CHASSIS ANCILLARY KITRS-232MODEM12007–6150DISCRETE I/OASSEMBLY12007–610012007–60509325-01812007–1000 12007–0005–01
MX-9325SUPPORT DATA7-7/7-8A4Figure 7-2. MX-9325 Transceiver Illustrated Parts List (Sheet 1 of 2)9325–019J21J18 J22A1A2J16A1A2J20A1A2ASSEMBLYA1A2J12A1A2J28A1A2J30A1A2J11CAPTIVESCREWS(2 PLACES) D(4 PLACES)A1A4ASSEMBLY F(2 PLACES) E(2 PLACES)CAPTIVE SCREWS(10 PLACES)(MP1)TOPCOVERA1A6ASSEMBLYA1A5ASSEMBLYFRONT PANEL REFERENCECONNECTORFRONT PANEL MAINTENANCEPORTA1A4A1A1A4A2 C B A A1A4A3CAPTIVESCREWS(4 PLACES)J1J5 J9 J8 J7 J4A1A5J6A1A5J3A1A5J1A1A5J5
MX-9325SUPPORT DATA7-9/7-10A4Figure 7-2. MX-9325 Transceiver Illustrated Parts List (Sheet 2 of 2)A1A8ASSEMBLY(MP2)BOTTOMCOVERCAPTIVE SCREWS(10 PLACES)G(2 PLACES)CAPTIVESCREWS(8 PLACES)A1A7ASSEMBLYA1A3ASSEMBLYCAPTIVE SCREW(2 PLACES)A1A3J3A1A3J4A1A3J2A1A3J1RF CONNECTOR(BOTH SIDES)A1A7J6A1A7J5A1A7J4A1A7J3CAPTIVESCREWS(8 PLACES)9325–020
MX-9325SUPPORT DATA7-11/7-12Figure 7-3. VHF Extender Unit Illustrated Parts ListEIA–530MODEM CARDDISCRETE I/OCARDRS–232MODEM CARD9325-021
MX-9325SUPPORT DATA7-137.5 ASSEMBLY COMPONENT LOCATION REFERENCESThe following provides component locations that are referenced during fault isolation and maintenance. If theconnectors and pins are labeled on an assembly, and there are no other components referenced, then there is nofigure for that assembly. Figure 7-4 provides reference to assembly locations of A4 HeatSink Assembly.7.6 FAULT ISOLATION INDEXESThe following provides indexes that are helpful during fault isolation. These indexes consist of a protective deviceindex and fault isolation index. the indexes are described in their respective paragraphs.7.6.1 Protective Device IndexA protective device index provides information on protective devices such as circuit breakers and fuses. Table 7-7provides the protective device index for the MX-9325 Transceiver.Table 7-7. Protective Device IndexRatingReferenceDesignation Panel Markingor ID Volts Amps CircuitProtected Diag.Ref.CB1 AC Power 230 8 Amps AC Input 2-1, 7-27.6.2 Fault Isolation IndexTable 7-8 is the fault isolation index for the MX-9325 Transceiver. It is nearly impossible to identify and publishprocedures for every fault that may, or may not, occur with a particular product. To help isolate faults that are notlisted in Chapter 5, Paragraphs 5.2.2 and 5.2.3. The functional areas are listed in the left column of the index inTable 7-8. The second column references the functional block diagrams for each functional area. A reference forthe text description for each functional area is provided in column three. Before using the index, consider thefollowing: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 datatransfers 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 thoselisted for Data, Transmit, Receive or control.Table 7-8. Fault Isolation IndexFunctional Area Signal PathDiagramFunctionalDescriptionParagraphData Signal Paths 4-3 4.4.2Transmit Signal Paths 4-4 4.4.2.1Receive Signal Paths 4-5 4.4.2.1Control Signal Paths 4-6 4.4.5Power Distribution Paths 4-7 4.4.7
MX-9325SUPPORT DATA7-14Figure 7-4. A4 Heatsink Assembly Component Location ReferencesA4A3A4A4A2A4A1 9325-022
MX-9325SUPPORT DATA7-157.7 CHASSIS CONNECTOR DATAThe following provides chassis connector data that is helpful during installation.7.7.1 Connectors and Mating Connectors Part NumbersTable 7-9 provides the chassis connector part numbers and their mating connector part numbers.Table 7-9. Connectors and Mating Connectors Part NumbersConnector Part Number Mating ConnectorPart NumberTO BE DETERMINED7.7.2 MX-9325 Transceiver Chassis Connector Pinout DataTables 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 PortPin Name1 SHIELD2 DCE_TX_DATA_A3 DCE_RX_DATA_A4 DCE_RTS_A5 DCE_CTS_A6 DCE_DSR_A7SIGNAL COMMON8 DCE_DCD_A9 DCE_RX_CLK_B10 DCE_DCD_B11 N/A12 DCE_TX_CLK_B13 DCE_CTS_B14 DCE_TX_DATA_B15 DCE_TX_CLK_A16 DCE_RX_DATA_B17 DCE_RX_CLK_A18 N/A19 DCE_RTS B20 N/A21 N/A22 DCE_DSR B23 N/A
MX-9325SUPPORT DATA7-16Table 7-10. J1 Host Interface Port - ContinuedPin Name24 N/A25 N/ATable 7-11. J2 Extender PortPin Name1 SHIELD2 DTE_TX_A3 DTE_RX_A4 DTE_RTS_A5 DTE_CTS_A6 DTE_DSR_A7SIGNAL COMMON8 DTE_DCD_B9 DTE_RX_CLK_B10 DTE_DCD_B11 N/A12 DTE_TX_CLK_B13 DTE_CTS_B14 DTE_TX_DATA_B15 DTE_TX_CLK_A16 DTE_RX_DATA_B17 DTE_RX_CLK_A18 DTE_LOCAL_LOOPBACK19 DTE_RTS_B20 DTE_DTR_A21 DTE_REMOTE_LOOP-BACK22 DTE_DSR_B23 DTE_DTR_B24 N/A25 N/ATable 7-12. J3 Discrete I/OPin Name1SHIELD/EARTH GROUND2 TIME_REF_IN_A
MX-9325SUPPORT DATA7-17Table 7-12. J3 Discrete I/O - ContinuedPin Name3 TIME_REF_IN_B4 TIME_REF_OUT_A5 TIME_REF_OUT_B6 CHAN_BUSY_IN_A7 CHAN_BUSY_IN_B8 CHAN_BUSY_OUT_A9 CHAN_BUSY_OUT_B10 RX_MUTE_IN_A11 RX_MUTE_IN_B12 RX_MUTE_OUT_A13 RX_MUTE_OUT_B14 KEY INHIBIT15 SIGNAL COMMON7.7.3 VHF Extender Unit Chassis Connector Pinout DataTables 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 ConnectionsSignal Description(Circuit Mnemonic) Circuit Board Edge ConnectorEIA-530Data Port (Card CageDB-25 Female)Wire Line (CardCage Terminal Block)Chassis Ground (Shield) 17, 18, 39, 40 1 1Local Analog Loopback (LL) 10 18 –TX Data A (BA) 14 2 –TX Data B (BA) 37 14 –RX Data A (BB) 35 3 –RX Data B (BB) 36 16 –RTS A (CA) 34 4 –RTS B (CA) 12 19 –CTS A (CB) 33 5 –CTS B (CB) 24 13 –DSR A (CC) 32 6 –DSR B (CC) 5 22 –Signal Ground (AB) 9, 31 7–Remote Loopback (RL) 29 21 –Carrier Detect A (CF) 8 8 –
MX-9325SUPPORT DATA7-18Table 7-13. EIA-Modem Connections - ContinuedSignal Description(Circuit Mnemonic) Circuit Board Edge ConnectorEIA-530Data Port (Card CageDB-25 Female)Wire Line (CardCage Terminal Block)Carrier Detect B (CF) 15 10 –Serial Clock RX A (DD) 11 17 –Serial Clock RX B (DD) 16 9 –Serial Clock TX–External/DTE A (DA) 7 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) 2 12 –DTR A (CD) 30 20 –DTR B (CD) 27 23 –Test Mode Indicator (TM) 6 25 –RX Line (–) 20 –2RX Line (+) 42 –3TX Line (–) 22 –4TX Line (+) 44 –5The 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 thebottom 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 pin44 is at the top.•Note that the keying slot is also counted as a “pin”.Table 7-14. Discrete I/O Card ConnectionsREF CARD CAGE PINOUTSSignal Description Card Edge Connector (Discrete I/OCard)Card Edge Connector (Motherboard)Discrete I/O In-terface ToMX-9325 Transceiver (Card CageDB-25 Female)Wireline (or Loop) Interface(Card CageTerminalBlock)RS-422 (–) TX P2–10 32 6RS-422 (+) TX P1–5 5 22RS-422 (–) RX P2–12 34 17RS-422 (+) RX P1–16 16 9
MX-9325SUPPORT DATA7-19Table 7-14. Discrete I/O Card Connections - ContinuedREF CARD CAGE PINOUTSSignal Description Card Edge Connector (Discrete I/OCard)Card Edge Connector (Motherboard)Discrete I/O In-terface ToMX-9325 Transceiver (Card CageDB-25 Female)Wireline (or Loop) Interface(Card CageTerminalBlock)+17 VDC P1–1, P2–11, 23– 17 VDC P1–3, P2–33, 25GND (SIGNAL) P1–9, P2–99, 31 7GND (FRAME) P1–17, P1–18,P2–17, P2–18 17, 18, 39, 40 1 1LOOP (–) TX P1–22 22 4LOOP (+) TX P2–22 44 5LOOP (–) RX P2–20 20 2LOOP (+) RX P2–20 42 3ALARM (+) P1–7 7 24ALARM (–) P1–6 6 25ALARM RESET P1–2 2 12RESERVED P1–11 33 5RESERVED P1–2 24 13The 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 atthe 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 andpin 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.
MX-9325SUPPORT DATA7-20Table 7-15. RS-232 Modem ConnectionsREF CARD CAGE PINOUTSSignal Description CIRCUIT BOARDEDGE CONNECTOR (PWB AND MOTHERBOARD)RS–232DATA PORTDB-25 (Female)WIRE LINE(CARD CAGETERMINALBLOCK)Chassis Ground 17, 18, 39, 40 1 1Local Loopback (V.54, Loop 3) 10 18 –TX Data 14 2 –37 14 –RX Data 35 3 –36 16 –RTS 34 4 –12 19 –CTS 33 5 –24 13 –DSR 32 6 –5 22 –Signal Ground 9, 31 7–Remote Loopback (V.54 Loop 2) 29 21 –Carrier Detect 8 8 ––8 VDC Output 15 10 –RX Clock Output (Sync mode) 11 17 –+8 VDC Output 16 9 –TX Clock Input – External (Sync Mode) 7 24 –38 11 –TX Clock Output – Internal (SyncMode) 13 15 –2 12 –30 20 –27 23 –Test Mode Indicator 6 25 –RX Line 20 –2RX Line 42 –3TX Line 22 –4TX Line 44 –5The pin convention for the RS-232 modem card edge connector is the same as that of the EIA-530 modem.
MX-9325SUPPORT DATA7-217.7.4 VHF Extender Unit Jumper/Dip Switch SettingTables 7-16 through 7-18 provides jumper setting available on the VHF Extender Unit Modem and Discrete I/OCards. Figures 7-6 through 7-10 provides the jumper locations.Table 7-16. EIA-530 Modem Jumper SettingsJumper Function PossibleSettingsJ1V54 DIS Prevents activation of remote V.54 loops Enable DisableJ2Carrier Selects the transmit carrier mode. When ON, transmit carrieris constantly ON. When CNTRL, transmit carrier is ON onlywhen RTS is HIGHONCNTRLJ3XMT Clock Selects the transmit timing signal from either: internal clock,external clock or receive clock and enables working in Asyn-chronous mode.INTEXTRCVASSYJ4RTS-CTS Delay Selects the delay between RTS and CTS. 0 ms9 ms70 msJ5 N/AJ6SW Enable Enables activation of DIG, ANA and REM loopbacks via thefront panel push buttons. ONOFFJ7RLB DTE (RL) Enables Remote Loopback command from the DTE interface(21) ENABLEDISABLEJ8ALB DTE (LL) Enables Analog Loopback command from the DTE interface(18). ENABLEDISABLEJ9RCV Level Selects the receiver sensitivity level required LOWHIGHJ10RCV Imped-anceSelects receive line impedance. 150WHIGHJ11REM PWR Fail Enables the Remote Power Failure feature. (Does not apply toEU.) ONOFFJ12XMT Level Selects the transmit output level to the line. 0 dBm–6 dBmJ13XMT Imped-anceSelects the transmit line impedance. 150WLOWJ14Chassis Ground The CON setting connects Signal Ground to Chassis Ground.The DIS setting disconnects them. CONDIS
MX-9325SUPPORT DATA7-22Table 7-17. Discrete I/O Card DIP Switch SettingsSwitch Closed Open Default SettingsS1A (Data Polarity) Normal Inverted ClosedS1B (Alarm) NO – Relay Closes on Alarm NC – Relay Opens on Alarm OpenS1C N/a N/a ClosedS1D ClosedTable 7-18. RS-232 Modem Jumper/DIP Switch SettingsJumper/Switch Function PossibleSettings1Data Rate Selects the data rate of the modem. 0=19.2 kbps1=14.4k2=9.6k3=7.2k4=4.8k5=3.6k6=2.4k7=1.2k2XMT Timing For synchronous operation, determines whether the transmittiming signal comes from the internal clock, external clock orreceive clock. Select ASY for asynchronous operation.INTASY EXRCV32W/4W Selects the line output configuration of the modem 2W or 4 W. 2W4W4CTS Delay Selects the RTS to CTS delay. 0ms8ms64ms5Carrier Selects the transmit carrier mode. ON setting is for constantcarrier, the CTRL setting is used to switch the carrier on onlywhen RTS is highONOFF6XMT Level Selects the transmit line level output. 0dBm–3dBm–6dBm–9dBm
MX-9325SUPPORT DATA7-23Table 7-18. RS-232 Modem Jumper/DIP Switch Settings - ContinuedJumper/Switch Function PossibleSettings7XMT IMPD Selects the transmit line impedance (ohms). 600300150LOW8RCV IMPD Selects the receive line impedance (ohms). 600300150HIGH9LL Pin 18 Enables or disables the Analog Loopback (LL) from the DTEinterface pin 18. ENDIS10RL Pin 21 Enables or disables the Remote Loopback (RL) from the DTEinterface pin 21. ENDIS11FP Switch Enables or disables control of the DIG/ANA/REM loopbackvia front panel pushbutton switches. ENDIS12Ground Selects or deselects connection of signal ground to chassisground. CONNECTDIS CONN13AGC ON selects AGC always on; CTRL selects AGC on when DCDis on, when DCD goes off, AGC remains at last level. ONCTRL14V.54 Delay ON activates V.54 delay for use in tail-end circuits (preventsmultiple loopback) OFF setting sets no delay (standard config-uration).ONOFF15ASYNC Length S1 is not used.S2 determines the amount of stop bit shortening for Asyncmode.S3 & S4 determine the character lengths for asynchronous op-eration.A length of 10 bits is the required for 8 data bits, no parity, 1stop bit. Refer to Table 7-19 for a complete listing of all data length set-tings.–ON= 25%OFF=12.5%S3=ON,S4=OFF
MX-9325SUPPORT DATA7-24Table 7-19. RS-232 Modem Data Length SettingsStartBit DataBit Parity Stop Bits Total BitsLength SwitchS3 SwitchS41 5 NONE 2 8 OFF OFF1 5 ODD/EVEN 1 or 1.5 8 OFF OFF1 5 ODD/EVEN 2 9 OFF ON1 6 NONE 1 or 1.5 8 OFF OFF1 6 NONE 2 9 OFF ON1 6 ODD/EVEN 1 or 1.5 9 OFF ON1 6 ODD/EVEN 2 10 ON OFF1 7 NONE 1 or 1.5 9 OFF ON1 7 NONE 2 10 ON OFF1 7 ODD/EVEN 1 or 1.5 10 ON OFF1 7 ODD/EVEN 2 11 ON ON1 8 NONE 1 or 1.5 10 ON OFF1 8 NONE 2 11 ON ON1 8 ODD/EVEN 1 or 1.5 11 ON ON
MX-9325SUPPORT DATA7-257.8 SYSTEM CABLING REQUIREMENTSThe following provides system cabling requirements and construction recommendations that is helpful duringinstallation. Table 7-20 lists the cabling requirements for the various site configurations. The quantities listed arefor each channel, which is equivalent to each transceiver or each TX/RX pair in the case of the Split Siteconfigurations.Table 7-20. MX-9325 System Cable Requirements - Quantity per ChannelSystem Configuration Cable Letter Identification and Quantity per ChannelAB#C** D E F G** H J K M*Standard System (Local) 111 1 1Standard System (Local)With Antenna Switch 111 1 1 1Remote Site Configuration 211 1 2 2 1Remote Site ConfigurationWith Antenna Switch 211 1 1 1 2 2 1Split Site Configuration 321 2 1 2 2 2 2Split Site Configurationwith Local and Remote AntennaSwitches321 2 2 1 1 2 2 2 2* 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.7.8.1 Cable ConstructionThe following paragraphs provide construction recommendations for each cable type. The length requirements aredetermined by site rack and equipment arrangements. The typical cable consists of a single cable with 2 connectorends, denoted P1 and P2 as shown in Figure 7-5.Figure 7-5. Typical System CableP1 P29325-035
MX-9325SUPPORT DATA7-267.8.1.1 Cable Type “A” EIA-530 DB25 Data Cable Male/FemaleThis cable provides twisted pair connection for EIA–530 data between the VGC, XCVR and EU. A COTS cablemay be purchased such as Black Box Corporation EVN530–#–MF, where # is the length in feet (standard lengthsof 5, 10, 25, 50, 75, 100, 150, and 200 feet, or custom lengths available). Alternatively, a custom cable may beconstructed 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 Part1-747579-0 (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 Part1-747579-0 (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 orsimilar.Table 7-21 lists the pinout of the EIA-530 Modem cable.Table 7-21. Type “A” EIA-530 Cable WiringSignal Description Connector PinP1 and P2DB25 Male & Female Cable PairChassis Ground (Shield) 1 1Local Analog Loopback (LL) 18 1TX Data A (BA) 2 2TX Data B (BA) 14 2RX Data A (BB) 3 3RX Data B (BB) 16 3RTS A (CA) 4 4RTS B (CA) 19 4CTS A (CB) 5 5CTS B (CB) 13 5DSR A (CC) 6 6DSR B (CC) 22 6Signal Ground (AB) 7 7Remote Loopback (RL) 21 7Carrier Detect A (CF) 8 8Carrier Detect B (CF) 10 8Serial Clock RX A (DD) 17 9Serial Clock RX B (DD) 9 9Serial Clock TX–External/DTE A (DA) 24 10Serial Clock TX–External/DTE B (DA) 11 10Serial Clock TX–Internal/DCE A (DB) 15 11Serial Clock TX–Internal/DCE B (DB) 12 11DTR A (CD) 20 12DTR B (CD) 23 12Test Mode Indicator (TM) 25 13 (single)
MX-9325SUPPORT DATA7-27NOTEThe EIA-530 Modem uses RS-422 signalling convention formost interfaces. (Exceptions are the RL, LL, and TM interfaceswhich use RS-423, and the ground connections.) Each RS-422interface involves a pair of leads labeled ”A” and ”B”. The Alead may also be referred to as (–) and the B lead may also bereferred 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 ConfigurationThis cable provides twisted pair connection for the 1 pulse per 6 second (1 PP 6S) Mode 3 timing signal sourcefrom 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 PartDMH–E–001•DA15 Male Connector (Crimp & Poke): Cinch Connector Part DAMA–15P Cinch Backshell PartDMH–A–001•Cable – Foil shield, 1 twisted pair, plenum rated: Alpha cable 58902, 24 AWG, .210” Diameter orsimilar.Table 7-22 lists the pinout of the timing cable.Table 7-22. Type “B” Timing Signal Cable WiringCircuit Name P1 DE9 Male P2 DA15 MaleShield (Connect drain) 1Time Ref In A (from VGC – PUL6–) 3 2Time Ref In B (from VGC – PUL6+) 2 3NOTEThe above interface uses the RS-422 signalling convention, withleads labeled ”A” and ”B”. The A lead may also be referred toas (–) and the B lead may also be referred to as (+), whichreflects the fact that, in the de–asserted (mark) condition, B ispositive 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 EUDiscrete 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 PartDMH-A-001•1 DB25 Male Connector (Crimp & Poke): Cinch Connector Part DBMA-25P Cinch Backshell PartDMH-B-001
MX-9325SUPPORT DATA7-28•Cable – Foil shield, 4 twisted pairs, plenum rated: Alpha cable 58904, 24 AWG, .221” Diameter orsimilar.•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 Direction TransceiverP1 DA15 Male Extender UnitP2 DB25 Male PairShield (Drain Wire) 1 1 ShieldChan Busy In A EU → XCVR 6 4 1Chan Busy In B EU → XCVR 7 9 1Rx Mute Out A XCVR → EU 12 6 2Rx Mute Out B XCVR→ EU 13 22 2NOTEThe above interfaces use the RS–422 signalling convention, withpairs of leads labeled ”A” and ”B”. The A lead in each case mayalso be referred to as (–) and the B lead may also be referred toas (+), 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, COTSThe “D” cable provides the coaxial RF connection between the XCVR and the input to the Optional AntennaSwitch, between the XCVR and the building Coaxial Lightning Protector and/or between the Optional AntennaSwitch output and the building Coaxial Lightning Protector. The cable should be constructed of RG-213/214 LowLoss Coax Cable or similar such as Belden 9913, with Type N male connectors on each end. For reference, the RFattenuation of the RG-213/214 type cable is approximately 2.3 dB (typical) per 100 feet at 120 MHz, andapproximately 1.5 dB per 100 feet at 120 MHz for Belden 9913. This does not include connector losses. Variouscable manufacturers carry suitable cable, such as Pasternack (mfg) part number PE3062–#, where # denotes thelength in inches, or Cable Experts 9913FCN#, where # denotes the length in feet (standard lengths of 3, 6, 50, and100 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 theExtender Unit COTS RS–232 modem (RS-232 DCE – DB25 female on unit). The cable wiring is straightthrough, 25-Pin D Male/Female cable, L-COM part number CS2N25MF–#, where # denotes the length of thecable in feet (standard lengths of 2.5, 5, 6, 10, 12, 15, 25, and 50 feet). The Null Modem Adapter is L-COM partnumber DAS25R.7.8.1.6 Cable Type “F”– RS–232 DB25 Cable, COTS – Male/FemaleThe “F“ cable provides the 25-pin RS-232 serial data connection between the Extender Unit COTS RS-232Modem (RS-232 DCE – DB25 female on unit) and the control port of the Antenna Switch. The Antenna Switchinterface is assumed to be that of the Delta Electronics MCU-8 or equivalent. Note that this interface includes aDB25 female connector on the unit, yet adheres to a DTE pinout (signal direction) convention. The cable wiring
MX-9325SUPPORT DATA7-29is straight through, 25 Pin D Male/Male cable, L-COM part number CS2N25MM–#, where # denotes the lengthof 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 theExtender Unit Discrete I/O card to the Transceiver (configured as an RX) Discrete I/O connector. The cable usesthe 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 PartDMH-A-001•1 DB25 Male Connector (Crimp & Poke): Cinch Connector Part DBMA-25P Cinch Backshell PartDMH-B-001•Cable – Foil shield, 4 twisted pairs, plenum rated: Alpha cable 58904, 24 AWG, .221” Diameter orsimilar.•Shrink sleeve/Cable JacketingTable 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 PairShield (Drain Wire) 1 1 ShieldChan Busy Out A XCVR → EU 8 6 1Chan Busy Out B XCVR→ EU 9 22 1Rx Mute In A EU → XCVR 10 4 2Rx Mute In B EU → XCVR 11 9 2NOTEThe above interfaces use the RS-422 signalling convention, withpairs of leads labeled ”A” and ”B”. The A lead in each case mayalso be referred to as (–) and the B lead may also be referred toas (+), 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, COTSThis 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 typeplug is fitted on the end which connects to the MX-9325 or VGC. The other end of the cable is left open (wiresonly) for installation of an appropriate customer supplied plug and subsequent connection (or hardwiring) withinthe customer’s rack or at a nearby wall location. Wiring conforms to the international color code of BLUE for ACLine, BROWN for AC Neutral, and GREEN/YELLOW for Safety Ground.
MX-9325SUPPORT DATA7-307.8.1.9 Cable Type “J” – Extender Unit 115 Vac Prime Power, COTSThis 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. ANEMA 15 (3 prong North American) type plug is fitted on the other end which is intended for direct connectionto grounded 115 Vac power outlet within the customer’s rack or at a nearby wall location. If installed outsideNorth 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, COTSThis 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. Theother end of the cable is left open (wires only) for installation of an appropriate customer supplied plug andsubsequent connection (or hardwiring) within the customer’s rack or at a nearby wall location. Wiring conformsto the international color code of BLUE for AC Line, BROWN for AC Neutral, and GREEN/YELLOW forSafety 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 TerminalConnectionThis cable provides the RS-232 serial data connection (temporary) between the Transceiver maintenance port andthe maintenance terminal. The cable wiring is straight through, 9 Pin D Male/Female cable, L–COM part numberCS2N9MF–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 AntennasThe ½ inch foam filled flexible transmission line is recommended for external and/or lengthy cables (e.g. 100feet) to antennas. For reference, the RF attenuation of this type cable is approximately .23 dB (typical) per 100feet at 120 MHz. RFS Cablewave part number 810918–001 (FLC12-50J) and N male connector part number738802 (CONN FLC12–50NM) may be used (or Andrews equivalents). The use of a short section of flexiblecable (such as RG-213/214 as used in Cable Type D) to connect the antenna to the transmission line isrecommended for ease of installation and maintenance, and to limit mechanical stresses on the transmission lineconnector 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 wherenecessary, especially at building ingress/egress panels.
MX-9325SUPPORT DATA7-31Figure 7-6. EIA-530 Modem Card9325-023J2J10J1J3J4J6J7 J11 J9 J13J8 J12 J14EDGE CONNECTOR
MX-9325SUPPORT DATA7-32Figure 7-9. Discrete I/O Card9325-024
MX-9325SUPPORT DATA7-33Figure 7-10. RS-232 Modem Card9325-025614151247812109513311
MX-9325SUPPORT DATA7-35/7-369325-026Figure 7-11. MX-9325 InterconnectSchematic Diagram
MX-9325INSTALLATION8-1CHAPTER 8INSTALLATION8.1 INTRODUCTIONThis chapter provides installation instructions for the MX-9325 Transceiver. Paragraph 8.2 providesrecommendations and Paragraph 8.3 provides unpacking and repacking guidelines. Paragraph 8.4 provides thestep-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 RECOMMENDATIONSThe information contained here provides general guidelines for installing the System. Read this chapter in itsentirety before beginning installation.8.2.1 Selection of Physical LocationWhen choosing a location, become familiar with the dimensions listed in Paragraphs 8.2.2 through 8.5.3. Takeinto 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).
MX-9325INSTALLATION8-2Figure 8-1. MX-9325 Transceiver Dimensions9325–02718.5”5.25”19”9325-001
MX-9325INSTALLATION8-38.2.2 GroundingWhen installing the MX-9325 Transceiver into a system rack, perform the following:WARNINGInadequate or defective grounding presents a personnel hazardthat could result in injury or death.CAUTIONInadequate 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 RequirementsThe MX-9325 Transceiver is designed to be powered from a 115 Vac or 230 Vac single phase source as listed inChapter 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, usethe supplied AC power cable listed in Chapter 7, Paragraph 7.4.4.8.2.4 EnvironmentalThe MX-9325 Transceiver is designed to function in the environments listed in Chapter 1, Paragraph 1.7.8.2.5 Access Clearance and Ventilation RequirementsWhen the MX-9325 Transceiver is supplied as part of a system designed by Harris, refer to the systemdocumentation. If installing the MX-9325 Transceiver in a customer specific application, make sure there isapproximately 2-Inches (5.8 cm) around chassis.8.2.6 Antenna ConsiderationsTo Be Determined.8.2.7 Tools and Materials RequiredA typical installation requires standard tools listed in Chapter 7, Paragraph 7.3.
MX-9325INSTALLATION8-48.3 UNPACKING AND REPACKINGEquipment is packed in corrugated boxes. A two-piece foam enclosure protects the equipment against abrasionand 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 UnpackingPerform 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 themto the proper authority. An external sticker on the shipping box provides additional instructionsconcerning inspection of the package.b. Use normal care to move the boxed equipment into the general location where it is to be installed. Certainboxes, depending on system configuration, may be heavy. Exercise care when moving boxed assembliesto and from locations.c. After removing the equipment from the box, check the contents against the packing slip to see that theshipment 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 RepackingPerform 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 sidesof the unit.b. Use the original packing material if it was retained. If not, use foam packing material to fill the spacebetween 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 PROCEDURESThe following paragraphs describe the procedures performed to properly install the MX-9325 Transceiver.NOTEPerform the procedures in the order the paragraphs are presentedfor installation. Reverse the order for MX-9325 Transceiverremoval.
MX-9325INSTALLATION8-58.4.1 Jumper/DIP Switch SettingsThe following paragraphs describe the jumpers and DIP switch setting of the MX-9325 Transceiver and VHFExtender Unit.8.4.1.1 MX-9325 TransceiverThe MX-9325 Transceiver does not require setting of jumpers or dip-switches, however, when multiple MX-9325Transceivers are installed in a system, their IDs need to be configured.8.4.1.2 VHF Extender UnitThe 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 InstallationThe 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 InstallationThe MX-9325 Transceiver can be stack mounted as long as proper ventilation is applied between top and bottomof equipment.The VHF Extender Unit can be stack mounted as long as proper ventilation is applied between top and bottom ofequipment.CAUTIONIncorrect voltage selection will damage equipment.WARNINGContact with line voltages will cause injury or death.8.4.4 MX-9325 Transceiver Rear Panel ConnectionsFigure 8-2 shows the MX-9325 Transceiver rear panel connectors. Refer to Figures 8-4, 8-5 and 8-6 for a typicalsystem interconnect diagrams. Refer to Chapter 7, Paragraph 7.7 for connector data and pinout information. Referto Chapter 7, Paragraph 7.8 for system cabling information.8.4.5 VHF Extender Unit Rear Panel ConnectionsFigure 8-3 shows the VHF Extender Unit rear panel connectors. Refer to Figures 8-4, 8-5 and 8-6 for typicalsystem interconnect diagrams. Refer to Chapter 7, Paragraph 7.7 for connector data and pinout information. Referto Chapter 7, Paragraph 7.8 for system cabling information.
MX-9325INSTALLATION8-6Figure 8-2. MX-9325 Transceiver Rear Panel ConnectorsREAR VIEW 9325-028Figure 8-3. VHF Extender Unit Rear Panel9325-029DB-25 CONNECTOR (14 PLACES)TERMINAL BLOCK (14 PLACES)115 VAC230 VAC8.4.6 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 systeminterconnect. Figure 8-6 illustrates a typical remote site system interconnect.
MX-9325INSTALLATION8-7Figure 8-4. Typical Standard Site System Interconnect Diagram9325-030ANTENNA SWITCHAntenna SwitchControl Port(RS–232 DTE)Antenna 1XCVR 1RFMX–9325TRANSCEIVERData & Maint Port(Host)DB25Discrete I/O PortDA15Extender Unit PortLocal Maint Port DE9Antenna I/F Type NGROUND STATION (VGC)Data & Maint PortTiming SignalAntenna SwitchControl Port–Local(RS–232 DTE)Antenna SwitchControl Port (Remote)(RS–232 DTE)LightningProtectionandAntennas(CFE)(OPTIONAL)Cable AMaint.TerminalXCVR 8RF Antenna 8Type N Type NDB25DB251/2 FoamflexTransmission LineEIA 530RS–422DB 25DE9NOTESCABLE A: EIA–530 DATA M/FCABLE B: CUSTOM TIMING CABLE (REQUIRED FOR MODE 3 ONLY)CABLE D: RG–213/214 LOW LOSS COAXCABLE E: COTS RS–232 DATA – 25 PIN M/FCABLE H: MX–9325 AND VGC PRIME POWERCABLE M: COTS RS–232 DATA – 9 PIN M/F120/240 VACCable HDE9120/240 VACCABLE HNULLMODEMADAPTERRepresents a male connector (pins)Represents a female connector (sockets)Represents a male connector, NEMA 15 Type power plugKEYCable BCable MCable ECable DRepresents a coax cable
MX-9325INSTALLATION8-9/8-10A4Figure 8-5. Typical Split Site System Interconnect Diagram9325-031ANTENNA SWITCHAntenna SwitchControl Port(RS–232 DTE)Antenna 1XCVR 1RFMX–9325TRANSCEIVERData & Maint Port(Host)DB25Discrete I/O PortDA15Extender Unit PortLocal Maint Port DE9Antenna I/F Type NGROUND STATION (VGC)Data & Maint PortTiming SignalAntenna SwitchControl Port–Local(RS–232 DTE)Antenna SwitchControl Port (Remote)(RS–232 DTE)(OPTIONAL)Cable AMaint.TerminalXCVR 8RF Antenna 8Type NDB25DB25EIA 530RS–422DB 25DE9120/240 VACCable HDE9120/240 VACNULLMODEMADAPTERCable BCable MCable ECable HEXTENDER UNITPS PSCOTS EIA–530 MODEMDISCRETE I/O CARD(NOT REQ”D FOR MODE 3)OPTIONALCOTS RS–232 MODEMDB25DB25DB25Cable ECable ACable CDB25(ACARS & Mode 2)Cable J Cable K115 VAC or 230 VACCable DTB4WTB4WTB4WANTENNA SWITCHAntenna SwitchControl Port(RS–232 DTE)Antenna 1XCVR 1RFMX–9325TRANSCEIVERData & Maint Port(Host)DB25Discrete I/O PortDA15Extender Unit PortLocal Maint Port DE9Antenna I/F Type NTIMING SOURCE(OPTIONAL–MODE 3 ONLY)1PP 6SLightningProtectionandAntennas(CFE)(OPTIONAL)Maint.TerminalXCVR 8RF Antenna 8Type NDB25120/240 VACCable HDE9Cable BCable MCable FCable ACable C(ACARS & Mode 2)Cable DEXTENDER UNITPS PSCOTS EIA–530 MODEMDISCRETE I/O CARD(NOT REQ”D FOR MODE 3)OPTIONALCOTS RS–232 MODEMCable J Cable K115 VAC or 230 VACTB4WTB4WTB4WDB25(Mode 3)orCoaxType NCoaxDB25DB25DB25REMOTE SITECoaxType NCoaxLOCAL SITENOTESCABLE A: EIA–530 DATA – 25 PIN M/FCABLE B: CUSTOM TIMING SIGNAL CABLE (REQUIRED FOR MODE 3)CABLE C: CUSTOM TIMING AND SIGNAL CABLE (REQUIRED FOR ACARS & MODE 2)CABLE D: RG–213/214 COAXCABLE E: COTS RS–232 DATA – 25 PIN M/FCABLE H: MX–9325 AND VGC PRIME POWERCABLE J: EXTENDER UNIT PRIME POWER – 115 VACCABLE K: EXTENDER UNIT PRIME POWER – 230 VACCABLE M: RS–232 DATA – 9 PIN M/FCABLE F: COTS RS–232 DATA – 25 PIN M/MCABLE G: CUSTOM DISCRETE I/O SIGNAL CABLE (REQUIRED FOR ACARS & MODE 2)INTERSITECABLE(CFE)(MODE 3)LightningProtection(CFE)AntennasandRepresents a male connector (pins)Represents a female connector (sockets)Represents a male connector, NEMA 15 Type power plugKEYRepresents a coax cable
MX-9325INSTALLATION8-11/8-12A4Figure 8-6. Typical Remote Site System Interconnect Diagram9325-032GROUND STATION (VGC)Data & Maint PortTiming SignalAntenna SwitchControl Port–Local(RS–232 DTE)Antenna SwitchControl Port (Remote)(RS–232 DTE)Cable AEIA 530DB 25120/240 VACRepresents a male connector (pins)Represents a female connector (sockets)Represents a male connector, NEMA 15 Type power plugKEYCable HEXTENDER UNITPS PSCOTS EIA–530 MODEMOPTIONALCOTS RS–232 MODEMDB25DB25Cable EDB25Cable J Cable K115 VAC or 230 VACTB4WTB4WANTENNA SWITCHAntenna SwitchControl Port(RS–232 DTE)Antenna 1XCVR 1RFMX–9325TRANSCEIVERData & Maint Port(Host)Discrete I/O PortDA15Extender Unit PortLocal Maint Port DE9Antenna I/FTIMMING SOURCE(OPTIONAL–MODE 3 ONLY)1PP 6SLightningProtectionandAntennas(CFE)(OPTIONAL)Maint.TerminalXCVR 8RFAntenna 8Type NDB25120/240 VACCable HDE9Cable BCable MCable FCable ACable DINTERSITECABLE(CFE)EXTENDER UNITPS PSCOTS EIA–530 MODEMOPTIONALCOTS RS–232 MODEMCable J Cable K115 VAC or 230 VACTB4WTB4WDB25 Type NDB25DB25DB25REMOTE SITENOTESCABLE A: EIA–530 DATA – 25 PIN M/FCABLE B: CUSTOM TIMING CABLE (REQUIRED FOR MODE 3 ONLY)CABLE D: RG–213/214 LOW LOSS COAXCABLE E: COTS RS–232 DATA – 25 PIN M/FCABLE F: COTS RS–232 DATA – 25 PIN M/MCABLE H: MX–9325 AND VGC PRIME POWERCABLE J: EXTENDER UNIT PRIME POWER –115 VACCABLE K: EXTENDER UNIT PRIME POWER –230 VACCABLE M: COTS RS–232 DATA – 9 PIN M/F1/2 Foarm FlexLOCAL SITERepresents a coax cable
MX-9325INSTALLATION8-138.5 POST-INSTALLATION PROCEDURES8.5.1 Inspection of InstallationWhen the radio system is installed and all connector cables are attached, verify that the following items arecompleted:•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 OnTable 8-1 lists the initial settings and power on procedures.Table 8-1. Initial Settings and Power On ProcedureStep Observe Referencea. Connect a 50-Ohm RF attenuator torear panel connector J104.b. Place PC or terminal POWERswitch in ON position. The PC boots or terminal powerson. Refer to PC or terminal operationinstructions.c. If using a PC, run the desired terminal emulation program. The PC runs the terminal emulation program. Refer to software operation in-structions for more information.d. Ensure that the terminal emulationsoftware or terminal is correctly configured.Refer to Chapter 3, Paragraph3.2.1. Also refer to terminal oremulation software operation instructions.e. Place POWER switch on MX-9325Transceiver front panel in the ONposition.The PC or terminal displays thepower-up screen. See FigureTBD.If the PC or terminal does notdisplay the power-up screen, re-fer to the non-BIT troubleshooting procedures inParagraph 5.2.3.f. PC or terminal keyboard, type BITcommand: bit v <enter>.If a BIT fault is displayed on thePC or terminal as a result of theBIT command, write down thefault code.Refer to the BIT troubleshootingprocedures in Paragraph 5.2.2.If no errors occur during BIT,continue operating the radio system in an attempt to generatea run-time fault. Periodically enter the tst <enter> commandin order to force the transmitterinto running BIT.If a run-time fault is generated,refer to the non-BIT trouble-shooting procedures in Paragraph5.2.3. If a BIT fault is generated,refer to the BIT troubleshootingprocedures in Paragraph 5.2.2.If no fault is generated, return radio system to operational readiness.
MX-9325INSTALLATION8-148.5.3 Radio CheckAfter installing the MX-9325 Transceiver and it has passed the initial setting and power on procedure a radiocheck should be preformed. A radio check consists of programing for channels, modes, and power levels that aregoing to be used. Transmit and receive between two stations with identical programming/configurations. Duringback-to-back tests, verify the following:•All channels used•All modes•All power levels
MX-9325GLOSSARYA-1APPENDIX AGLOSSARYA.1 GLOSSARYThe following provides a glossary of Abbreviation and Acronyms used in this manual.List of Abbreviations and AcronymsAbbreviation TermA, AMP Ampere(s)ac, AC Alternating CurrentACARS Aircraft Communications Addressing and Reporting systemsADC Analog-to-Digital ConverterADS Automatic Dependent SurveillanceANSI American National Standards InstituteANT AntennaAOC Aeronautical Operational ControlARTCC Air route traffic control centerASCII American Standard Code for Information InterchangeATC Air Traffic ControlATCRBS Air traffic control radar beacon systemATCT air traffic control towerAVPAC Aviation VHF Packet communicationsAUX AuxiliaryAWG American Wire GaugeBERT Bit Error Rate TesterBPS bits per secondBSI British Standard InstituteBIT Built-In TestBITE Built-In Test EquipmentBW BandwidthCCentigrade/CelsiusCAA civil aviation authorityCARC Chemical Agent Resistive CoatingCB Circuit BreakerCBIT Continuous Built-In TestCCW CounterclockwiseCE European Communitycm CentimeterCMU Communication Management Unit
MX-9325GLOSSARYA-2List of Abbreviations and Acronyms – ContinuedAbbreviation TermCOTS Commercial Off-the-ShelfCPLR CouplerCR Carriage ReturnCSA Canadian Standard AssociationCSMA Carrier Sense Multiple AccessD8PSK Differential 8 Phase Shift KeyingDAC Digital-to-Analog ConverterDAM Direct Access MemorydB Decibel(s)dBm Decibels referenced to 1 milliwattdc, DC Direct CurrentDCD Data Carrier DetectDCE Data Circuit Terminating EquipmentDE Data EncryptionDemod DemodulatedDiff DifferentialDip, DIP Dual In-Line PackageDMM Digital MultimeterDP Double PoleDPDT Double Pole, Double ThrowDPRAM Dual-Port RAMDPST Double Pole, Single ThrowD/A Digital to AnalogDSP Digital Signal ProcessorDSR Data Set ReadyDTE Data Terminal EquipmentDTL Diode Transistor LogicDTM Data Text MessageDV Digitized VoiceDTMF Dual Tone Multi-FrequencyDTR Data Terminal ReadyDUART Dual Universal Asynchronous Receiver-TransmitterDUSART Dual Universal Synchronous/Asynchronous Receiver-TransmitterDVM Digital VoltmeterDVOM Digital Volt-Ohm Meter
MX-9325GLOSSARYA-3List of Abbreviations and Acronyms – ContinuedAbbreviation TermEAM Embedded Adaptive ModuleEAROM Electronically Alterable Read Only MemoryECM Electronic Counter MeasureECCM Electronic Counter-Counter MeasureEEPROM, E2PROM Electrically Erasable Programmable Read Only MemoryEMI Electromagnetic InterferenceEIA Electronic Industries AssociationEOM End of MessageEPROM Erasable Programmable Read-Only MemoryEUROCAE The European Organization for civil aviation EquipmentFAA Federal Aviation AdministrationFCC Federal Communications CommissionFD Full DuplexFEC Forward Error CorrectionFET Field-Effect TransistorF/F Flip-FlopFFT Fast Fourier TransformFH Frequency HoppingFSK Frequency Shift KeyingF/W, FW FirmwareG-A, G/A Ground-to-AirGF Government (or customer) FurnishedGFE Government-Furnished EquipmentGnd, GND GroundGNI Ground Network InterfaceGPIB General Purpose Interface BusGUI Graphical User InterfaceHD Half DuplexHDCP Harris Data Communications ProtocolHDLC High-Level Data Link ControlHF High FrequencyHSS High-Speed SynchronizerHSSB High-Speed Serial BusHWCI Hardware Configuration ItemHz Hertz
MX-9325GLOSSARYA-4List of Abbreviations and Acronyms – ContinuedAbbreviation TermIC Integrated CircuitID IdentificationIDF Intermediate Distribution FrameIF Intermediate FrequencyINT InterruptINTLK InterlockINTR InterruptI/O Input/OutputICAO International Civil Aviation AuthorityISB Independent SidebandISO International Standards OrganizationJJouleskKilo (thousand)KBPS Kilo Bits Per Secondkbyte KilobytekHz Kilohertzkm Kilometer(s)kV Kilovolt(s)kVA Kilovolt Ampere(s)KVD Keyboard Visual DisplayKVDU Keyboard Visual Display UnitkW Kilowatt(s)LAN Local Area NetworkLAPB Link Access Protocol, BalancedLBT Listen Before TransmitLC Inductive CapacitiveLCD Liquid Crystal DisplayLD Lock DetectLED Light-Emitting DiodeLF Low FrequencyLLSB Lower Lower SidebandLOS Line of SightLP Low PassLPC Linear Predictive CodingLQA Link Quality Analysis
MX-9325GLOSSARYA-5List of Abbreviations and Acronyms – ContinuedAbbreviation TermLRU Line Replaceable UnitLSB Lower SidebandLSD Least Significant DigitMMeter, Mega (one million)mMilli, one-one thousandthmA Milliampere(s)MART Multimode Aeronautical Radio SystemMbyte MegabyteMDM MODEMMHz MegahertzMIC MicrophoneMIL-STD Military Standardmm Millimeter(s)Mod Modification, ModulatedMod/Demod Modulator/DemodulatorModem Modulator/DemodulatorMOPS Minimum Operational Performance StandardMOS Metal Oxide SemiconductorMOSFET Metal Oxide Semiconductor Field Effect Transistorms, msec MillisecondMSK Minimum Shift KeyingMTBCF Mean Time Between Critical FailureMTBF Mean Time Between FailureMTBM Mean Time Between MaintenanceMTBR Mean Time Between ReplacementMUF Maximum Usable FrequencyMux Multiplex, MultiplexermVac Millivolts Alternating CurrentmVdc Millivolts Direct CurrentnNano (1 x 10–9)NB NarrowbandNC, N.C. Normally ClosedN/C Not ConnectedNMOS N-channel Metal-Oxide-SemiconductorNO, N.O. Normally Open
MX-9325GLOSSARYA-6List of Abbreviations and Acronyms – ContinuedAbbreviation TermNo. NumberNPN N-type, P-type, N-type (transistor)nsec NanosecondsNVG Night Vision GogglesWOhms, a unit of resistance measurementO&M Operation and MaintenanceO&R Operation and RepairO.C. Open Circuit or Open CollectorOEM Original Equipment ManufacturerOp Amp Operational AmplifierOCXO Oven Controlled Crystal OscillatorpPicoPA Power AmplifierPBIT Periodic Built-In TestPABX Private Automatic Branch ExchangePCB Printed Circuit BoardPC Personal ComputerPCM Pulse Code ModulationPEP Peak Envelope PowerpF Picofarad (1 x 10–12 Farads)PIV Peak Inverse VoltagePLL Phase-Locked LoopPNP P-type, N-type, P-type (transistor)P-P Peak-to-PeakPPS Pulse Per SecondPROM Programmable Read Only MemoryPS Power SupplyPt Pt, Pt-Pt Point-to-PointPTT Push-to-TalkPWB Printed Wiring BoardQTY QuantityR, RG Receiver Circuit: Receive, Receive Ground (from teletype)RAD Random Access DataRAM Random Access MemoryRC Resistive Capacitive
MX-9325GLOSSARYA-7List of Abbreviations and Acronyms – ContinuedAbbreviation TermRCU Remote Control UnitRCV/RX ReceiveRCVR ReceiverRD ReadRDY ReadyREC ReceptacleRETX RetransmitRF Radio FrequencyRFI Radio-Frequency InterferenceRLPA Rotatable Log Periodic AntennaRLSD Receive Level Sense DetectRMS Root Mean SquaredROM Read-Only MemoryRST ResetRTC Real Time ClockRTN ReturnRTS Request to SendRTTY Radio TeletypeRTU Remote Terminal UnitS, SG Send Circuit, Send Ground (to teletype)SA Spectrum AnalyzerSB SidebandSCR Silicon Controlled RectifierSHLD ShieldSINAD A ratio of (signal + noise + distortion) to (noise + distortion) used to measurethe signal quality of a communication channel. SINAD is commonly used toevaluate the ability of a channel to pass voice traffic.Sip, SIP Single In-Line PackageSMD Surface-Mount DeviceSNR Signal-to-Noise RatioSOM Start of MessageSP Single PoleSPDT Single-Pole, Double-ThrowSSB Single SidebandST Single Throw
MX-9325GLOSSARYA-8List of Abbreviations and Acronyms – ContinuedAbbreviation TermSWR Standing Wave RatioSYNC SynchronousTB Terminal BoardTCXO Temperature Controlled Crystal OscillatorTDQPSK Time Differential Quaternary Phase Shift KeyingTGC Transmitter Gain ControlT/R Transmit/ReceiveTT TeletypeTTL Transistor-Transistor LogicTT VFT Teletype Voice Frequency ToneTTY TeletypeTX TransmituMicro (1 x 10–6)UART Universal Asynchronous Receiver-TransmitteruF Microfarad (1 x 10–6 Farads)UHF Ultra High FrequencyUSART Universal Synchronous/Asynchronous Receiver-TransmitterUSB Upper Sidebandusec MicrosecondsUUSB Upper Upper SidebandUUT Unit Under TestuW MicrowaveVVoltVA Volt-AmpereVac Volts, Alternating CurrentVCA Voltage Controlled AttenuatorVCO Voltage Controlled OscillatorVCTCXO Voltage Controlled Temperature Compensated Crystal OscillatorVDC, Vdc Volts, Direct CurrentVDL VHF Data LinkVDU Video Display UnitVECT VectorVF Voice FrequencyVFO Variable Frequency OscillatorVFR Voice Frequency Repeater
MX-9325GLOSSARYA-9List of Abbreviations and Acronyms – ContinuedAbbreviation TermVGC VHF Ground Station ComputerVHF Very High FrequencyVLF Very Low FrequencyVMOS V-groove Metal-Oxide-SemiconductorVOM Volt-Ohm-MeterVOX Voice Operated TransmitterVpp Volts peak-to-peakVSWR Voltage Standing Wave RatioWWatt(s)WRL Wire Run ListXCVR TransceiverXMT TransmitXMTR Transmitter
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MX-9325MAINTENANCE LEVELSB-1APPENDIX BMAINTENANCE LEVELSB.1 MAINTENANCE LEVELSFigure B-1 describes the Harris defined and supported maintenance levels.
MX-9325MAINTENANCE LEVELSB-2HUMM,THERE’SSOMETHINGWRONG WITHMY SYSTEMPA BAD FILTERMAINTENANCE CONCEPT OUTLINELEVEL ICORRECTIVEAND PREVENTIVEMAINTENANCETECHNICALMANUALSTRAININGLEVEL IINO SPECIAL ITEMSNO TOOLS/TESTEQUIPMENTI SEE, THEPROBLEM ISWITH THE PA.PA BAD FILTERMAINTENANCEREPAIR KITSCOMMON TOOLSTEST EQUIPMENTANDSPARESNO SPARESOPERATORTRAININGNO SPECIAL ITEMSSYSTEMSMANUALSYSTEMSMAINTENANCETRAININGLEVEL IIIWELL...BITLEADS ME TOSUSPECT AFAULTY MODULEMODULE#: A30FAULT #: F12UNITMAINTENANCEMANUALUNITMAINTENANCEMANUALPRE–FAULTEDMODULESTHAT’S THEPROBLEM WITHTHE MODULE...A BAD IC!LEVEL IVSMT REPAIRLEVEL IV MAINTTRAININGSOFTWAREMAINTENANCEPROGRAMSTEST FIXTUREDATASCHEMATIC PACKAGETECHNICAL REPAIRSTANDARDMCO–001AFigure B-1. Harrris Defined Maintenance Levels
TECHNICAL PUBLICATIONEVALUATION FORMTo the User of this Instruction Manual:HARRIS Corporation, RF Communications Division continually evaluates its technical publications forcompleteness, technical accuracy, and organization. You can assist in this process by completing andreturning this form. Please specify section, page number, figure or table number where applicable.MANUAL TITLE:MANUAL NUMBER: REVISION: COVER DATE:GENERAL EXCELLENT GOOD FAIR POORTEXT [ ] [ ] [ ] [ ]SETUP/ALIGNMENT INST. [ ] [ ] [ ] [ ]TROUBLESHOOTING INST. [ ] [ ] [ ] [ ]TABLES [ ] [ ] [ ] [ ]ILLUSTRATIONS [ ] [ ] [ ] [ ]PARTS LISTS [ ] [ ] [ ] [ ]SCHEMATIC DIAGRAMS [ ] [ ] [ ] [ ]GENERAL COMMENTS: Please include your suggestions for improvements to the manual. Specify chapter,page, paragraph, figure number, or table number as applicable. Attach examples or extra pages if morespace is needed.CHAPTER EXCELLENT GOOD FAIR POORINTRODUCTION/GENERAL INFORMATION [ ] [ ] [ ] [ ]OPERATION [ ] [ ] [ ] [ ]FUNCTIONAL DESC/THEORY OF OPERATION [ ] [ ] [ ] [ ]SCHEDULED MAINTENANCE [ ] [ ] [ ] [ ]TROUBLESHOOTING [ ] [ ] [ ] [ ]CORRECTIVE MAINTENANCE [ ] [ ] [ ] [ ]DOCUMENTATION [ ] [ ] [ ] [ ]INSTALLATION [ ] [ ] [ ] [ ]ACCESSORIES [ ] [ ] [ ] [ ]CUT HERE LEAF-043A MAP
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