Viking VX 900 MHz LTR User Manual
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Viking VX 900 MHz LTR User Manual

Viking VX 900 MHz LTR User Manual

75-160w repeater
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VIKING
VX
®
900 MHz LTR
75W-160W Repeater
Part No. 242-2009-232/234
Second Printing
October 1999
Supersedes 001-2009-200
Part No. 001-2009-201
10-99mwp
Printed in U.S.A.
October 1995
1-1
Part No. 001-2008-202

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  • Page 1 ® VIKING ® 900 MHz LTR 75W-160W Repeater Part No. 242-2009-232/234 Second Printing October 1999 Supersedes 001-2009-200 Part No. 001-2009-201 10-99mwp Printed in U.S.A. October 1995 Part No. 001-2008-202...
  • Page 2 October 1995 Part No. 001-2008-202...
  • Page 3 ® LTR, Multi-Net, LTR-Net, Viking Head/EFJohnson Logo, Call Guard and Summit are registered trademarks of the E. F. Johnson Company. All other company and/or product names used in this manual are trademarks and/or registered trademarks of their respective manufacturer.
  • Page 4 October 1995 Part No. 001-2008-202...

  • Page 5: Table Of Contents

    VIKING VX CONNECTION ........
  • Page 6 TABLE OF CONTENTS (CONT.) SOFTWARE INTRODUCTION................3-1 HOW TO USE THIS MANUAL .
  • Page 7 TABLE OF CONTENTS (CONT.) REPEATER PROGRAMMING CREATING A NEW FILE ..............5-1 SELECT REPEATER TO EDIT .
  • Page 8 TABLE OF CONTENTS (CONT.) 160W POWER AMPLIFIER..............7-17 GAIN BLOCK (Q501 AND U501) .
  • Page 9 TABLE OF CONTENTS (CONT.) TRANSMIT AUDIO PROCESSING ............7-40 TRANSMIT DATA AND CWID PROCESSING.
  • Page 10 TABLE OF CONTENTS (CONT.) REPEATER SETUP ............... . 7-14 TRANSMITTER TEST/ADJUSTMENTS .
  • Page 11 VIKING VX REPEATERS WITH 2000 OCXO DRAWER........
  • Page 12 TABLE OF CONTENTS (CONT.) OUTPUT ALARMS ............... . . 4-4 4-10 ALARM CROSS REFERENCE.
  • Page 13 TABLE OF CONTENTS (CONT.) 7-10 EXCITER TEST SETUP ..............7-12 7-11 75W POWER AMPLIFIER TEST SETUP .
  • Page 14 VIKING VX REPEATER ACCESSORIES ........

  • Page 15: Introduction And Operation

    There must be one repeater for each RF channel and each repeater The VIKING VX 900 MHz repeater is designed contains a logic module responsible for signaling on for operation in a LTR system. It operates on the 900 its own channel.

  • Page 16: Accessories

    OCXO drawer is the same a described above with the exception of a backup OCXO. The accessories available for the Viking VX LTR repeater are listed in Table 1-1. A brief description of 1:8 Splitter Shelf - This increases the number of out- some of these accessories follows.

  • Page 17: Product Warranty

    INTRODUCTION AND OPERATION Extender Card- Used to extend the cards plugged into Table 1-1 VIKING VX REPEATER the backplane beyond the card rack enclosure when ACCESSORIES tuning the repeater and while troubleshooting. Extender Cable Kit- These are seven foot extension Accessory Part No.

  • Page 18: Factory Returns

    INTRODUCTION AND OPERATION factory repair facilities. Regular Technical Service ever, it is recommended that you contact the Technical hours are 7:30 a.m. - 5:30 p.m. Central Time, Service Department before returning equipment Monday - Friday. The Technical Service Department because a service representative may be able to sug- can be reached using one of the following telephone gest a solution to the problem so that return of the numbers:...

  • Page 19: Internet Home Page

    INTRODUCTION AND OPERATION 1.12 REPEATER OPERATION You may also send your order by mail or FAX. The mailing address is as follows and the FAX number 1.12.1 MAIN PROCESSOR CARD (MPC) is shown in Section 1.2. Refer to Figure 1-1. E.F.

  • Page 20: Alarm In Test Mode

    INTRODUCTION AND OPERATION Alarms RF Thermal Sense Alarm Condition Exists When the Repeater is in Test mode the safety measures are disabled. Therefore, if the Repeater is NOTE: Safety measures are disabled keyed for an extended period and the power amplifier temperature increase, thermal shutdown will not occur.

  • Page 21: Main Audio Card (Mac)

    INTRODUCTION AND OPERATION 1.12.2 MAIN AUDIO CARD (MAC) Power Supply On/Off Switch Refer to Figure 1-1. S508 turns the power supply DC voltages on and off from the IAC in the front of the repeater. External Speaker Jack Power Indicator J104 provides repeater audio output to an external speaker.

  • Page 22: Power Supply

    If both VIKING VX and LTR 1.13.1 INTRODUCTION repeaters are located at a site, 20 repeaters can be interconnected. Refer to Section 2.9 for information NOTE: The VIKING VX does not require a separate on connecting the data bus. LTR logic drawer. 1.13.4 MOBILE TRANSCEIVERS The repeater model used in an LTR system is determined by frequency range.

  • Page 23: Mobile Data Message Order

    INTRODUCTION AND OPERATION 1.14.2 MOBILE DATA MESSAGE ORDER 1.14.3 ID VALIDATOR OPERATION Each repeater monitors all the time slots on the If the ID Validator is used, it is programmed with repeater data bus. If it detects its number in another the status of up to all 5000 home repeater/ID code time slot, it begins transmitting an additional data mes- combinations possible with a 20-channel system.
  • Page 24 INTRODUCTION AND OPERATION October 1999 Part No. 001-2009-201 1-10...

  • Page 25: Specifications

    INTRODUCTION AND OPERATION SPECIFICATIONS GENERAL Frequency Range 896-901 MHz Receive, 935-940 MHz Transmit Dimensions 9.125 H x 17" W x 20.9" D AC Voltage/Frequency 100-240V AC/50-60 Hz AC Current (at 117V AC) 0.40A (Standby), 1.8A (25W), 3.3A (75W), 5.8A (160W) AC Input Power 47W (Standby), 211W (25W), 390W (75W), 680W (160W) DC Current at 26.5V DC...
  • Page 26 INTRODUCTION AND OPERATION October 1999 Part No. 001-2009-201 1-12...

  • Page 27: Installation

    -30°C to +60°C (-22°F to +140°F). 2.4 AC POWER Humidity The AC power source to the Johnson VIKING Less than 95% relative humidity at 50°C. VX Repeater can be 120V AC or 240V AC. Nothing need be done to the power supply for 240V AC opera- Air Quality tion.

  • Page 28: Battery Backup

    Figure 2-2 TEMPERATURE SENSOR CABLE the initial system. The VIKING VX Repeater power supply can be 2.6 800W POWER SUPPLY equipped with an optional 24V DC back-up in the event of AC power failure. Since the transmitter will...

  • Page 29: Ac Input Requirements

    As in any fixed radio installation, measures should be taken to reduce the possibility of lightning The AC input connector is an IEC connector damage to the Viking VX equipment. Proper ground- equipped with a locking mechanism. ing eliminates shock hazard, protects against electro- magnetic interference (EMI) and lightning.

  • Page 30: Protection Guidelines

    INSTALLATION Ground each piece of equipment separately. Do VSWR= not ground one piece of equipment by connecting it to 1.05 1.10 : 1 another grounded piece of equipment. 1.09 1.20 : 1 1.13 1.30 : 1 A good DC ground must be found or created at 1.17 1.40 : 1 the site.

  • Page 31: Unpacking And Inspection

    INSTALLATION • Do not run ground wires parallel to any other wiring (e.g. a ground wire parallel to a telephone line), except other ground wires. • Double check all equipment for good ground and that all connections are clean and secure. 2.8 UNPACKING AND INSPECTION OCXO 1 E.F.

  • Page 32: Repeater Data Bus Installation

    (see Table 1-1 and Figure 2-8) is used to connect exist- ing (8X00) repeaters with VIKING VX repeaters and is installed on the back of the VIKING VX cabinet (see Figures 2-11, 2-12 and 2-13). The RJ-11 to BNC Adapter Module is not necessary for systems that only...

  • Page 33: Mpc Data Bus Jumper Settings

    INSTALLATION 2.9.2 MPC DATA BUS JUMPER SETTINGS is usually used. An example of a combining system for a five-channel system is shown in Figure 2-4. The Refer to Figure 2-6 for crystal selection and amount of power loss introduced by a combiner HSDB Code selections jumper placement.

  • Page 34: Ocxo Drawer Connections

    INSTALLATION 2.11 OCXO DRAWER CONNECTIONS 2.11.3 MIXED REPEATER CONNECTION WITH 8900 OCXO DRAWER 2.11.1 VIKING VX CONNECTION These guidelines should be followed when using These guidelines should be followed when using 2009 series repeaters with an 8900 OCXO drawer, Part 2009 series repeaters with a 2000 OCXO drawer, Part No.

  • Page 35: Attenuator Settings

    INSTALLATION 2. If connection to additional 2009 series repeaters is necessary, additional 8-Way Splitter Shelves, Part A010 IN SPLITTER SHELF No. 023-2000-924, are added as required. All additional shelves are connected to the 1.25 MHz Output ports of the 2000 OCXO drawer. The level at the splitter shelf output ports is approx- imately -10 dBm.

  • Page 36: Viking Vx Repeaters With 2000 Ocxo Drawer

    SELECTION CRYSTAL SELECTION -10 dBm JOHNSON JOHNSON HSDB JOHNSON JOHNSON HSDB JOHNSON JOHNSON HSDB END REPEATERS MPC SWITCHES/JUMPERS JOHNSON JOHNSON HSDB CODE SELECTION CRYSTAL SELECTION Figure 2-10 VIKING VX REPEATERS WITH 2000 OCXO DRAWER October 1999 Part No. 001-2009-201 2-10...

  • Page 37: To Bnc Adapter

    INSTALLATION SERIES 2000 OCXO DRAWER (023-2000-925) 1.25 MHz OUTPUTS LOCAL OSCILLATOR HSDB LOGIC RJ-11 TO BNC ADAPTER JOHNSON BNC "T" RECEIVER HSDB BNC "T" EXCITER LOGIC JOHNSON BNC "T" RECEIVER HSDB BNC "T" EXCITER LOGIC JOHNSON BNC "T" RECEIVER HSDB BNC "T"...

  • Page 38: Mixed Repeaters With 8900 Ocxo Drawer

    INSTALLATION 8-WAY SPLITTER SHELF (023-2000-924) +10 dBm (023-8900-300) 1.25 MHz 1.25 MHz OUTPUTS ATTENUATOR KIT (023-2000-923) INPUT LOCAL OSCILLATOR SPLIT IN ATTEN IN ATTEN OUT HSDB LOGIC RJ-11 TO BNC ADAPTER JOHNSON BNC "T" RECEIVER HSDB BNC "T" EXCITER LOGIC JOHNSON BNC "T"...

  • Page 39: Mixed Repeaters With 2000 Ocxo Drawer

    INSTALLATION 8-WAY SPLITTER SHELF (023-2000-924) SERIES 2000 OCXO DRAWER (023-2000-925) ATTENUATOR KIT 1.25 MHz 1.25 MHz 1.25 MHz OUTPUTS (023-2000-923) OUTPUTS INPUT SPLIT IN ATTEN IN ATTEN OUT HSDB LOGIC RJ-11 TO BNC ADAPTER JOHNSON BNC "T" RECEIVER HSDB BNC "T" EXCITER LOGIC JOHNSON...
  • Page 40 INSTALLATION October 1999 Part No. 001-2009-201 2-14...

  • Page 41: Software

    SOFTWARE SECTION 3 SOFTWARE 3.1 INTRODUCTION Follow the computer instructions for loading the disk. The MS-DOS Revision 2.0 or later operating The Johnson 2000 Repeater Program on 3.5 inch system is needed to run the programs. The computer ® disk, Part No. 023-9998-297, uses an IBM personal needs to have RS-232C capability, for example, the computer to program the EEPROM Memory in the...

  • Page 42: Command Line Options

    SOFTWARE 3.1.5 COMMAND LINE OPTIONS 3.1.6 COLOR OR MONOCHROME OPERATION HELP The programming software utilizes color for a color monitor and video card. However, with LCD- To show all options available from the command type displays, this may make some information hard line type: /h or /?.

  • Page 43: Minimum Free Memory Required

    3.4 ALIGNMENT SOFTWARE TESTT9L.LNF The 2000PGMR2.EXE file is self extracting The software for the VIKING VX repeater pro- which means that the files extract automatically when grams the MPC to open and close the audio/data gates executed. To extract these files so the program can be...

  • Page 44: Help F1

    SOFTWARE Refer to Section 7 for Alignment Procedures as shown in the program, alignment points diagrams and test setup diagrams. 3.5 HELP F1 Help screens are available for most parameters and options in this program. Whenever a parameter or options clarification is needed, press F1 and if a help screen is available it will pop-up on the screen.

  • Page 45: Pull Down Menus

    PULL DOWN MENUS SECTION 4 PULL DOWN MENUS 4.1 MENU DISPLAYS Load File The menus available are listed at the top of the Dir c:\example\file\load File *.qx screen. Move the cursor with the arrow keys to high- light the menu name. Press Enter to view the menu file1.qx and the arrow keys to scroll through the menu.

  • Page 46: Print Repeater Configuration

    PULL DOWN MENUS Repeater Number Channel Number TELCO Network Type Area Stand-alone CWID Time CWID Message Local Mic ID Test Mode ID Paging RF Power Level Power Source Data Modem Setup Parameters F4 Default Select Repeater Repeater Number Alarm Configuration Repeater Type Input Alarms Input Type Selection...

  • Page 47: Setup Parameters

    PULL DOWN MENUS This menu is used to create new files and set or CWID TIME change the repeater operating parameters. The file- name for the repeaters in this file is shown in the This is the time interval between transmission of lower left corner of the screen.

  • Page 48: Select Repeater

    PULL DOWN MENUS DATA MODEM If the input is disabled, the input alarm line is inactive. When energized and current flow is This is selected if the Data Modem option is detected, the alarm is activated. When de-energized installed. This option is not compatible with Paging, and no current flow is detected, the alarm is acti- TIC, or VNC options.

  • Page 49: Repeater Type

    PULL DOWN MENUS 4.3.4 REPEATER TYPE ALARM DESCRIPTION This is a text string (up to 15 characters) to This screen (see Figure 4-11 ) selects the repeater describe the alarm. This test string is sent via Morse type (LTR signaling protocol and features): code if the alarm input is programmed with a Tx ID and an output is selected in the cross reference menu Frequency Band...

  • Page 50: Write Setup Parameters

    PULL DOWN MENUS 4.4.1 WRITE SETUP PARAMETERS 4.4.2 READ SETUP PARAMETERS This command sends the contents of a file to the This command reads the contents of the repeater and programs the EEPROM memory in the EEPROM memory of a repeater and loads it into a Main Processor Card (MPC).

  • Page 51: Hardware

    PULL DOWN MENUS 4.5 HARDWARE between the repeater and the destination user (mobile) and the data content of the repeater transmit data stream. The message contains data received from the File Edit Transfer Hardware Test Utilities destination and data sent to the mobile by the repeater. The repeater receives the destination’s: Unique ID, HSDB Monitor Rx/Tx Data...

  • Page 52: Input Monitor

    PULL DOWN MENUS 4.5.6 MODE SELECT RF Line Monitor The Mode Select screen places the repeater either Synthesizer Lock Lines Receive Parameters in the Normal mode or the Test mode. In the Normal Exciter Synthesizer: Wideband Audio Output: Receive Synthesizer: LO Injection: mode the repeater operates as a normal repeater.

  • Page 53: Test

    PULL DOWN MENUS Frequency Adjust Power Output Adjust All Receive Tests TCXO Frequency Adjust Audio Distortion Hum & Noise Measurement SINAD Measurement Squelch Adjust Data Level Adjust Local Speaker/Mic Desense Check Miscellaneous Tests All Test Expander Check (900 MHz) Repeater Setup Receiver Transmitter Tests All Transmit Tests...

  • Page 54: Power Amplifier

    PULL DOWN MENUS 4.6 TEST File Edit Transfer Hardware Test Utilities File Edit Transfer Hardware Test Utilities COM Port Receiver Display Mode Exciter Alarm Display Full Rptr/Station User Level RNT Interface Telephone Interface VNC Interface Figure 4-25 TEST MENU Figure 4-26 UTILITIES MENU 4.6.1 POWER AMPLIFIER 4.7.1 COM PORT This menu selection walks through the align-...

  • Page 55: Display Mode

    PULL DOWN MENUS 4.7.2 DISPLAY MODE This screen allows the color mode to be selected for color monitors. When using a laptop, mono- chrome is recommended for better resolution. Select Color Mode Desired ( ) Color ( ) Monochrome Spacebar to Select Figure 4-29 COLOR MODE SELECTION 4.7.3 USER LEVEL There are two levels to choose from, Novice and...
  • Page 56 PULL DOWN MENUS October 1999 Part No. 001-2009-201 4-12...

  • Page 57: Repeater Programming

    REPEATER PROGRAMMING SECTION 5 REPEATER PROGRAMMING 5.1 CREATING A NEW FILE 13.Type in a valid DOS filename. For this example site1.dat is used. An example will be used to show the program- ming for a new file created for Site 1. 14.The file consists of default and repeater one under the filename of site1.dat.

  • Page 58: Repeater Setup Parameters

    REPEATER PROGRAMMING Table 5-1 REPEATER SETUP PARAMETERS Parameter Response Description Repeater Number 1-20 Each repeater is assigned a Home Repeater number from 1- Channel Number 1-399 Each repeater is programmed with a number of the channel that it is operating on. Telco Network Type None Data signaling type for RNT, FSK, RS232 or FSK B&B.
  • Page 59 REPEATER PROGRAMMING File Edit Transfer Hardware Test Utilities <F1> - Help 09:17:09 LTR Repeater Setup Parameters Edit Repeater Number: 1 Telco Network Type: TIC Channel Number: 100 Area: Sync Repeater: No CWID Time: Stand Alone: CWID Message: EXAMPLE ID Validator: Local MIC ID: RF Power Level: 75 Test Mode ID:...
  • Page 60 REPEATER PROGRAMMING October 1999 Part No. 001-2009-201...

  • Page 61: Circuit Description

    CIRCUIT DESCRIPTION SECTION 6 CIRCUIT DESCRIPTION 6.1 RECEIVER filtering of the receive signal is provided by 3-pole helical filter L204-L206. A section of microstrip on 6.1.1 INTRODUCTION the collector of Q201 and C205/C207 match the impedance from Q201 to the 3-pole helical filter The receiver provides high sensitivity and selec- L204-L206.

  • Page 62: Second Mixer/Detector (U202)

    CIRCUIT DESCRIPTION 52.95 MHz 4-POLE 52.95 MHz 52.95 MHz 4-POLE BANDPASS BANDPASS MIXER RF AMP IF AMP CRYSTAL FILTER CRYSTAL FILTER FILTER FILTER U201 A201 L201/L202/L203 Q201 L204/L205/L206 Z201/Z202 Q202 Z203/Z204 RECEIVE RF IN 843-848 MHz OCXO IN HIGH STABILITY SYNTHESIZER Q203 Q204...

  • Page 63: Wideband Audio Amplifier (U203B)

    CIRCUIT DESCRIPTION The 450 kHz second IF is then fed to ceramic fil- The phase detector input signals are generated by ter Z205, then to the IF amplifier. The center fre- counters in U205 that are programmed to divide by a quency of Z205 is 450 kHz with a -6 dB bandwidth of certain number.

  • Page 64: Synthesizer Block Diagram

    CIRCUIT DESCRIPTION DATA OUT PORT SELECT 13-STAGE R COUNTER OUTPUT A LOGIC OSC OR 4-STAGE DIVIDER DOUBLE-BUFFERED R REGISTER 16 BITS LOCK DETECT AND CONTROL SHIFT CLOCK REGISTER C REGISTER 8 BITS OUTPUT B CONTROL (OPEN-DRAIN OUTPUT) DATA IN LOGIC PHASE/FREQUENCY ENABLE DETECTOR A...

  • Page 65: Lock Detect

    CIRCUIT DESCRIPTION To determine the overall divide number of the R806 and R807. AC voltage divider C812 and C813 prescaler and N counter, the number of TCXO output initiates and maintains oscillation. C803 couples pulses required to produce one N counter output pulse Q802 to resonator L220 that provides the shunt induc- can be counted.

  • Page 66: Synthesizer (U209)

    CIRCUIT DESCRIPTION 6.1.15 SYNTHESIZER (U209) sor Card (MPC), which is buffered and latched through the Interface Alarm Card (IAC) and fed into The synthesizer inputs/outputs are shown in Fig- the synthesizer on J201, pin 20 to Data input port ures 6-1 and 6-3. The synthesizer output signal is the U209, pin 19.

  • Page 67: Buffer Amplifier (Q210, Q211)

    CIRCUIT DESCRIPTION 6.1.18 BUFFER AMPLIFIER (Q214, Q215) NOTE: Section 8.2.5 describes how the N and A counter numbers are calculated for other channels. A cascode amplifier formed by Q214 and Q215 To determine the overall divide number of the provides amplification and also isolation between the prescaler and N counter, the number of VCO output VCO and Receiver RF stages.

  • Page 68: Exciter Vco And Tcxo Frequency Modulation

    CIRCUIT DESCRIPTION Resonator L404 provides the shunt inductance of the amplifier U129B and transmit modulation gate U118D tank circuit. The shunt capacitance of the tank circuit to P100, pin 29 (Tx MOD). P100, pin 29 is connected is made primarily of C804 in series with CR802. RF to backplane connector J2, pin 8 and RFIB connector choke L805 completes the DC bias path to ground.

  • Page 69: Lock Detect

    CIRCUIT DESCRIPTION The phase detector output signal is generated by The fV input is produced by dividing the TCXO counters in U401 programmed to divide by a certain frequency using the prescaler and N counter in U401. number. This programming is provided through J401, The prescaler divides by 64 or 65.

  • Page 70: Buffer Amplifier (Q401, Q402)

    CIRCUIT DESCRIPTION HIGH STABILITY SYNTHESIZER BUFFER HS CS EX Q401/Q402 U401 HS LK EX TX OCXO FROM Q204 SWITCH LPTT Q405 BUFFER TCXO EX MOD U402B U402A Y401 BUFFER U404A U404B MAIN SYNTHESIZER A007 Q410/Q411 Q412 Q413 TO PA DATA BUFFER BUFFER U403...

  • Page 71: Buffer Amplifier (Q403, Q404)

    CIRCUIT DESCRIPTION The synthesizer contains the R (reference), N, Both the N and A counters begin counting down and A counters, phase and lock detectors and counter from their programmed number. When the A counter programming circuitry. reaches zero, it halts until the N counter reaches zero. Both counters then reset and the cycle repeats.

  • Page 72: Buffer Amplifier (Q406, Q407)

    CIRCUIT DESCRIPTION 6.2.13 RF AMPLIFIERS (Q412, Q413) bypass is provided by C416, C418 and C419. The out- put of Q403/Q404 is coupled to U403, pin 20 by C417. RF amplifier Q412 is biased by CR402, R469, R470 and R472. C448 provides RF bypass from the 6.2.10 BUFFER AMPLIFIER (Q406, Q407) DC line and R471/R472 provide supply voltage isola- tion.
  • Page 73 CIRCUIT DESCRIPTION OCXO 1 BUFFER U906A 10 MHz REF OUT SWITCH DIVIDER (OSC 1) Y901 Q901 (OSC 2) U905 LINE DRIVERS U901A/B/C/D, U902B, U904D U906B 1.25 MHz REF OUT ALARM RELAY Q905, K901 RF ALARM OUT ONE-SHOT OCXO RF OUTPUT MULTIVIBRATOR ALARM INDICATOR Q903, DS901...

  • Page 74: Ocxos, Buffers , Divider And Line Driver

    CIRCUIT DESCRIPTION 10 MHz ALLOW 30 MINUTES WARM UP FOR PROPER STABILIZATION 1.25 MHz OUTPUTS 1 2 3 4 5 6 7 8 9 10 11 12 1314 1718 BACK PANEL OCXO1 OCXO2 OUTPUT DELTA F DC BACKUP OCXO 1 OCXO 2 INTERRUPT INTERRUPT...

  • Page 75: Ocxo Pulse Detection

    CIRCUIT DESCRIPTION U901B 10 MHz (OCXO 1, Q901) U901C 10 MHz 10 MHz SIGNAL OUTPUT (OCXO 2, Q902) (U905, U906) U901D U902B U904D U901A 74HC00 (OSC 1) (OSC 2) U902D U904A REMOTE CONTROL U902C (S904, U908) 74HC04 U903D OSCILLATOR SELECT OSC 2 STATUS (S905, U909) (U912, PIN 4)

  • Page 76: Power Amplifier

    CIRCUIT DESCRIPTION The Q2 output of U911, pin 12 is applied to Power control is connected to WO505 from the U913, pin 14, which is one input of an internal phase RF Interface board (RFIB). RF is filtered from the comparator.

  • Page 77: Power Detectors (U504A, U502B)

    CIRCUIT DESCRIPTION LOW-PASS POWER FILTER SENSE FINAL 1 POWER CR502 RF OUTPUT SPLITTER FORWARD/REVERSE COMBINER POWER DETECTOR AMP / PRE-DRIVER DRIVER Q502 RF IN U501 Q501 RF LOAD Q503 POWER CONTROL CIRCULATOR THERMAL U651A/B U652A/B SENSOR THERMAL SENSOR U502A U503 POWER FORWARD REVERSE...

  • Page 78: Final Amplifiers (Q701, Q702, Q703, Q704)

    CIRCUIT DESCRIPTION POWER SENSE RF 1 SPLITTER COMBINER 1/2 WAVE DELAY LINE Q701 Q702 COMBINER LOW-PASS POWER SENSE FILTER RF 2 SPLITTER RF OUTPUT 1/4 WAVE TRANSFORMER GAIN BLOCK DRIVER DIRECTIONAL COUPLER RF IN Q501 U501 Q502 POWER RF LOAD CONTROL CIRCULATOR RF 3...

  • Page 79: Rf Interface Board

    CIRCUIT DESCRIPTION 6.6 RF INTERFACE BOARD Pin 4 GROUND The RF Interface Board connects the Receiver, Pin 4 carries ground current between the RF Exciter and Power Amplifier to the backplane and Interface board and Backplane board. power supply (see Figure 6-10). Pins 5-6 UNUSED The input and output connectors for the RF Inter-...
  • Page 80 CIRCUIT DESCRIPTION Pin 13 RF MUX1 INH Pin 24 UNUSED The Multiplexer-1 Inhibit (U105, pin 6) is a Pin 25 LOGIC CONTROL TO FANS CMOS input from the Controller that inhibits (dis- ables) the output from the RF 1 Multiplexer with a Pin 25 is in parallel with the temperature sensor.

  • Page 81: Fan Connector (J104)

    CIRCUIT DESCRIPTION 6.6.4 POWER AMPLIFIER CONNECTIONS Pin 30 RSSI This pin is the Receive Signal Strength Indica- WO 115 POWER SENSE tion to the Controller. This RSSI is used for tune-up of the Receiver front-end during factory test mode. The This capacitive feedthrough pin is at +15V DC to dynamic range is 60 dB.

  • Page 82: Exciter Connector (J102)

    CIRCUIT DESCRIPTION WO 122 RF OUT 1 0V-5V output and 0°C to +100°C (+32°F to 212°F) input when driving a 10k ohm load. The primary This capacitive feedthrough pin is a voltage functions of this line are for fan on/off and PA power source that is a function of the output power of Q701.

  • Page 83: Receiver Connector (J103)

    CIRCUIT DESCRIPTION Pin 10 GROUND Pin 19 RF CLK Pin 11 LPTT The clock controls the Exciter synthesizer when loading. The input source in the Controller is TTL The Logic Push-To-Talk (LPTT) is an open col- with the speed determined by the synthesizer chip. lector from the Controller.
  • Page 84 CIRCUIT DESCRIPTION Pin 10 UNUSED Pin 16 HS CS RX Pin 16 is the 900 MHz Receiver high stability Pin 11 GROUND synthesizer chip select. This synthesizer is the same circuit as used in the Exciter. A low enables loading Pin 11 carries ground current between the RFIB the high stability synthesizer loop.

  • Page 85: Rf Interface Board Block Diagram

    CIRCUIT DESCRIPTION MUX/RES FORWARD RF POWER CONTROL +26V P101 POWER PC STR U103 U102A P102 POWER +15V P103 ADJUST U102B Q102-Q105 P104 Q101 COMPARATOR P105 Q108 Q111B PWR CNTRL MUX 3 RF DET (PRE-DRIVER) U109A FORWARD POWER U112B FINAL 1 POWER U104 RF MUX3 INH U112A...

  • Page 86: Power Supply

    CIRCUIT DESCRIPTION 6.7 800W POWER SUPPLY C111. The resistor network connected to CR104 charges up C106/C107 to +18V off the line. This pro- vides the bias voltage required to start the controller WARNING IC U102. Once the IC turns on current is being switched on L107.

  • Page 87: Block Diagram

    CIRCUIT DESCRIPTION Figure 6-11 BLOCK DIAGRAM October 1999 Part No. 001-2009-201 6-27...

  • Page 88: Synchronizing Circuits

    CIRCUIT DESCRIPTION In operation, the power MOSFETs Q116, Q118 converters, the cycle terminates and a new one starts. are on for approximately one-third of the period pro- This forces the +15V and +5V converters to run at the viding current to the primary side of T107. During same frequency and is slightly delayed from the that time CR121 is forward conducting and charging +26.5V converter.

  • Page 89: Converter

    CIRCUIT DESCRIPTION 6.7.6 +15V CONVERTER Sync pulse is added into the low side of C176 via C172 and R225. The free running frequency of the The input voltage to this "Buck" DC/DC con- 15V converter (approximately 145 kHz) is set about verter is the main +26.5V output fused through F102.

  • Page 90: Battery Back-Up Module

    CIRCUIT DESCRIPTION 6.8.2 CHARGER The majority of the voltage and current limits are set with fixed value components in the power supply. However, the +26.5V, +15V and +5.2V supplies are The charger charges the batteries when the adjustable. When certain components are replaced, repeater is on and switch S101 is "on".

  • Page 91: Reverse Battery Protection

    CIRCUIT DESCRIPTION 6.8.4 ENGAGING THE RELAY Charger Voltage The main purpose of the Battery Back-Up Mod- ule (BBM) is that when the power supply loses AC -55mV/°C line voltage, a pair of series connected 12V lead acid batteries (approximately 26.4V) or other 23-28.5V DC 27.3V source will engage to the supply allowing the repeater to operate.

  • Page 92: Bbm Fan Control

    CIRCUIT DESCRIPTION 6.8.6 BBM FAN CONTROL 6.9 CARD RACK The voltage supply to the thermal measurement The card rack provides slots for up to eight logic circuit is taken from the 26.5V DC line into the BBM. cards; including Main Processor Card (MPC), Main A precision temperature sensor U106 is mounted on Audio Card (MAC) and the Interface Alarm Card the PC board near a screw into the BBM bracket...

  • Page 93: Alarm External Connector Board

    CIRCUIT DESCRIPTION 6.10 ALARM EXTERNAL CONNECTOR BOARD The alarm external connector board (A10) is the interface for the alarm outputs and connecting repeat- ers through the high speed data bus. ALARMS TO CARD RACK EXTERNAL CONNECTOR REPEATER I/O BOARD TO CARD RACK TO CARD RACK HIGH SPEED DATA BUS...

  • Page 94: Main Processor Card

    CIRCUIT DESCRIPTION • 6.11 MAIN PROCESSOR CARD Receiver synthesizer lock, Exciter synthesizer lock, thermal level from the power amplifier, VSWR 6.11.1 INTRODUCTION level from the PA, forward power level, RSSI signal level, audio levels from the MAC, Receiver and The Main Processor Card (MPC) connects to the Exciter from the IAC.

  • Page 95: High Speed Data Bus Microprocessor (U13)

    CIRCUIT DESCRIPTION P2-0 STAGING STAGING A19-A0 P2-1 LATCH LATCH PROGRAMMABLE P2-2 etc. P2-3 CONTROLLER P2-4 P2-5 TxD0 RxD0 SERIAL P1-6 COMMUNICATION CTS0 INTERFACE TxD1 RxD1 BAUD RATE CTS1 GENERATOR RESET INT ROM P2-6 16K BYTES P2-7 P1-0 P1-7 INT RAM P1-1 PROGRAMMABLE 256 BYTES...

  • Page 96: Chip Select Decoders (U15/U4)

    CIRCUIT DESCRIPTION The operating speed of the microprocessor is set Pin 15 MREQ by an 11.059 MHz clock generated by Y2. This clock frequency is divided down by an internal divider to A memory request line operates in conjunction provide a machine cycle time of 1.08 µs. Most pro- with the Read/Write lines.

  • Page 97: J1 Computer Connector

    CIRCUIT DESCRIPTION 6.11.8 J3 BAUD RATE Pins 28-29 +5V IN Pins 60-61 J3 is jumpered to select the baud rate from the This is the +5V input to the MPC from the power computer to the MPC, these two baud rates must be supply via the Controller backplane.

  • Page 98: Audio/Data Microprocessor (U111)

    CIRCUIT DESCRIPTION Audio control functions for each repeater are per- When it is time to transmit the CW Identification, formed by the main processor in the MPC. The MPC the main processor on the MPC sends the identifica- contains the software and maintains control over the tion to U111 via the data bus and U160 (Rx FIFO).

  • Page 99: Receive Squelch Circuitry

    CIRCUIT DESCRIPTION 6.12.5 RECEIVE DATA CIRCUITRY Audio gates U113B/C/D permit noise squelch cir- cuit, control logic, and audio switch to control gating of the audio signal. The control signal from the noise The receive wide band audio signal is the unfil- squelch circuit is applied to U113B through U113D.

  • Page 100: Compandor Option

    CIRCUIT DESCRIPTION When the audio received must be routed to the bridge. When a high-level signal is applied to the external speaker or speaker/microphone, Local Audio bridge, the bridge opens and the output of the bridge is Mute Gate U114D is enabled by U111/latch U108. limited to a specific level.

  • Page 101: P101 Signaling Connector

    CIRCUIT DESCRIPTION logic 1 level that is slightly higher and a logic 0 that is filter passes the 800 Hz fundamental present in the slightly lower. This pulse shaping minimizes interfer- signal. The output of the filter is jumpered by P106 ence between data bits when the data is filtered by the on J106, pins 2/3 and P107 on J106, pins 4/5 to the low-pass filter.

  • Page 102: P100 External Outputs

    Viking VX repeaters. A 50 ohm termination is puts to the terminal block on the back of the Repeater required if Viking VX repeaters are used with exist- cabinet. These outputs are connected to other external ing repeaters and the interface.

  • Page 103: J100 A D Level Test Point

    CIRCUIT DESCRIPTION 6.12.18 J105 WATCH DOG Pin 28 A D LEVEL This is the Audio/Data Level output. J105 enables or disables the watchdog timer for reset. Normal operating mode is P105 jumpering Pin 29 TX MOD J105, pins 2/3. This jumper should not be moved or removed.

  • Page 104: Isolated Inputs

    CIRCUIT DESCRIPTION 6.13.2 ISOLATED INPUTS Standard 12V/24V AC control transformer out- puts can be accepted as well as DC voltages. This The isolated alarm inputs are provided via a ter- input voltage range is 5-24V RMS. External resistors minal block on the back of the repeater (see Figures connected in series may be used to extend the input 6-16 and 6-17).

  • Page 105: Alarm Functions

    CIRCUIT DESCRIPTION The third form is the output relay and to transmit Pins 1-4 ADDRESS BUS (A12-A19 Only) a 15-character description of the alarm over-the-air to Pins 33-36 a remote location. The description is sent in Morse code with a transmit ID assigned during programming. This address bus provides a path between the A transceiver programmed with this ID can monitor MPC main processor and the latches and multiplexers...

  • Page 106: P501 External Outputs

    CIRCUIT DESCRIPTION Pins 16/17 UNUSED Pin 47 READ Pin 18 SYNC IN Read is used with the MREQ line to read data from the MPC processor and external memory. This is an input received from a connection to an external device. Pin 48 WRITE Pins 19/51...
  • Page 107 CIRCUIT DESCRIPTION Pin 7 EXT OUT 1 Pin 16 HS CS EX This is an external output to rear connector J1. This is the 900 MHz Exciter high stability synthe- sizer chip select. A low enables loading the high sta- Pin 8 RF CLOCK bility synthesizer loop.

  • Page 108: J500 A D Level Test Point

    CIRCUIT DESCRIPTION 6.13.7 J500 A D LEVEL TEST POINT Pin 30 RF DATA B Data B (U105, pin 10) is the middle significant 20 lines (of the possible 24) of RF functions sam- bit in the 3 multiplex chips located on the RFIB. This pled are multiplexed to the Controller through this pin pin is a CMOS input from the Controller requiring a using three multiplex chips.

  • Page 109: Main Processor Card Block Diagram

    ADDRESS BUS (19:0) EPROM A0-A19 A0-A14 LED DRIVER MAIN MICROPROCESSOR IO1-IO8 FLASH MEMORY A0-A19 A0-A16 A0-A14 LPTT DATA BUS (7:0) DQ0-DQ7 IO1-IO8 DISPLAY DRIVER RESET DMARQ0 DMAAKO DMARQ1 D0-D7 RST1 BALANCED Rx/Tx RESET IRDB- INT POLL RES IN TxD1 U20B U20A 10 MHz RIDB+...

  • Page 110: Main Audio Card Logic Block Diagram

    U115A VOTER AUDIO MUTE U108 U114D LOCAL AUDIO MUTE U113C RX MUTE GATE LATCHES U114A RX OPTION P101 ADDRESS LATCHES A0-A19 D1-D8 U115B RX VOICE U116B RX AUDIO U115C RX VOICE TO BACKPLANE U116A FSK TO AUDIO A16-A19 A12-A15 U103 U133 U153C REPEAT U107...

  • Page 111: Main Audio Card Audio Block Diagram

    Rx VOICE LOCAL AUDIO GATE OUTPUT AMPLIFIER J104 U114D U132 EXTERNAL SPEAKER J101 U108 SPEAKER/MIC Rx VOICE P100 VOTER AUDIO VOTER AUDIO TO BACKPLANE Rx VOICE VOICE AMPLIFIER MUTE P100 GATE GATE AMPLIFIER VOTER AUDIO 25 U120A U115A U115B U120B U115C 31 Rx VOICE U108...

  • Page 112: Interface Alarm Card Block Diagram

    P500 S500 P500 ALARM 1 IN ALARM INPUTS +15V RF INTERFACE P501 CR507 U520 CR506 RF MUX 1 INH RF MUX 2 INH DATA BUS (7:0) DO-D7 D0-D7 RF MUX 3 INH PC STR IAC ADDRESSING LED CONTROL U505 HS CS EX MISC INPUTS STN CS EX S501...

  • Page 113: Alignment And Test Procedures

    ALIGNMENT AND TEST PROCEDURES SECTION 7 ALIGNMENT AND TEST PROCEDURES 7.1 OCXO AND TEST EQUIPMENT FREQUEN- 7.2.2 VOLTAGE MEASUREMENTS CY STABILITY Apply power to the Receiver by plugging the 20- The receiver and transmitter frequencies are pin cable from the RF Interface Board into J201 (see locked to the 1.250000 MHz reference frequency from Figure 7-1).

  • Page 114: Front End Adjustments

    ALIGNMENT AND TEST PROCEDURES 5. The Synthesizer is programmed for 199 channels 8. Tune C207, L209, L211 and L225 for peak voltage below the Receive Channel. on J201, pin 7 (TP3). Decrease the generator output level to maintain 2-3V. 6. The voltage on U209, pin 6 (TP2) should be Distortion should be <5% (typically <...

  • Page 115: Exciter Alignment

    ALIGNMENT AND TEST PROCEDURES J201 R261 R264 U206 U208 R284 Y201 Z213 L220 L223 L224 L231 L225 L211 L206 L205 L202 L204 L203 L201 L207 L209 L229 Figure 7-1 RECEIVER ALIGNMENT POINTS 7.3 EXCITER ALIGNMENT 7.3.2 VOLTAGE MEASUREMENTS Refer to Figure 7-2 for component locations. Apply power to the Exciter by plugging the 20- Refer to Figure 7-10 for equipment needed and setup pin cable from the RF Interface Board into J401.

  • Page 116: Tcxo Frequency Adjust

    ALIGNMENT AND TEST PROCEDURES 5. Press the space bar to unkey the Exciter. 7. Press the space bar to unkey the Exciter. 7.3.4 TCXO FREQUENCY ADJUST NOTE: Ensure that the oscilloscope is "DC" cou- pled and the Modulation Analyzer has the 1.

  • Page 117: Power Amplifier Alignment

    ALIGNMENT AND TEST PROCEDURES 7.4 75W POWER AMPLIFIER ALIGNMENT 7.4.2 FORWARD POWER OUTPUT CALIBRA- TION 7.4.1 INTRODUCTION 1. Connect the: Refer to Figures 7-3 and 7-5 for component loca- power supply ground lead to P105, tions. Refer to Figure 7-11 for equipment needed and +15V DC lead to P103, setup diagram.

  • Page 118: Reflected Power Adjust

    ALIGNMENT AND TEST PROCEDURES 3. Adjust power limit control R76 clockwise until power is limited to 0.55 dB above 85W (95W). If the maximum PA power is < 95W, adjust R76 until power begins to decrease. 7.4.4 REFLECTED POWER ADJUST 1.

  • Page 119: Power Amplifier Alignment

    ALIGNMENT AND TEST PROCEDURES 7.5 160W POWER AMPLIFIER ALIGNMENT 7. Adjust Forward Power Calibration Pot R663 for 160W ±0.1 dB (±3.5W). Refer to Figures 7-4 and 7-5 for component loca- tions. Refer to Figure 7-8 for equipment needed and 8. Verify Output 1 is within 20% of Output 2 and Out- setup diagram.

  • Page 120: Rf Interface Board Alignment Points

    ALIGNMENT AND TEST PROCEDURES R663 Q704 R680 R717 R716 WO510 R730 R701 Q703 U501 Q702 R703 R702 Q701 Q502 Figure 7-4 160W POWER AMPLIFIER ALIGNMENT POINTS J104 R170 J103 J102 U108 R171 R150 R106 U104 WO143 J101 WO144 WO147 WO126 WO145 WO124 WO123...

  • Page 121: Power Extender Cables

    ALIGNMENT AND TEST PROCEDURES GREEN GREEN WHITE WHITE WHITE WHITE BLACK BLACK BLACK BLACK (INCLUDED IN 2000 SERIES SERVICE KIT 250-2000-230) Figure 7-6 POWER EXTENDER CABLES VOLTMETER RF SIGNAL GENERATOR REPEATER LINK LINES RXA+ RXA+ RXA- RXA- J100 TXS+ TXS+ J103 TXS- TXS-...
  • Page 122 ALIGNMENT AND TEST PROCEDURES J103 PROG JACK A D LEVEL J10 0 RESET LOCAL POWER ON/OFF/VOL CWID R236 HANG SWITCH MOBILE J102 XMIT SPKR J101 TEST POINT EXT SPKR J104 J500 J501 J502 +15V POWER METER 50 OHM DUMMY LOAD HP 436A 40 dB THRULINE...

  • Page 123: Receiver Test Setup

    ALIGNMENT AND TEST PROCEDURES VOLTMETER VOLTMETER 1.25 MHz OSCILLOSCOPE OCXO1 OCXO2 DELTA F OUTPUT DC BACKUP INTERRUPT OCXO 1 INTERRUPT OCXO 2 INTERRUPT 16 OHM AUDIO DISTORTION POWER CABLES ANALYZER COMMUNICATIONS HP 334A SERVICE MONITOR 36-PIN RIBBON CABLE FREQUENCY COUNTER RFIB J401 J201...

  • Page 124: Exciter Test Setup

    ALIGNMENT AND TEST PROCEDURES VOLTMETER VOLTMETER 1.25 MHz OSCILLOSCOPE OCXO1 OCXO2 DELTA F OUTPUT DC BACKUP INTERRUPT OCXO 1 INTERRUPT OCXO 2 INTERRUPT MODULATION ANALYZER POWER CABLES HP 8901A 10 dB POWER METER 36-PIN RIBBON CABLE 50 OHM DUMMY LOAD HP 436A FREQUENCY COUNTER 10 dB...
  • Page 125 ALIGNMENT AND TEST PROCEDURES J103 PROG JACK A D LEVEL J100 RESET LOCAL POWER ON/OFF/VOL CWID R236 HANG SWITCH MOBILE J102 XMIT SPKR J10 1 TEST POINT EXT SPKR J500 J104 J501 J502 +15V R663 R680 Q503 R509 POWER METER U501 50 OHM DUMMY LOAD...

  • Page 126: Full Repeater Alignment

    Transmit Mode 7.6.2 REPEATER SETUP 1. Press the space bar to key the repeater. The Viking VX repeater has been pretested at the 2. The Transmit LED on the IAC should turn on to factory, therefore only performance tests are required indicate the repeater is transmitting.
  • Page 127 ALIGNMENT AND TEST PROCEDURES 3. Adjust R237 for 0 dBm (775 mV RMS). 6. Increase the RF generator output until the Receiver unsquelches. Reading shall be ≤ 10 dB SINAD. 4. Connect a 16 ohm load and distortion analyzer to J101 or J104 of the MAC.

  • Page 128: Receiver Expander Measurement

    ALIGNMENT AND TEST PROCEDURES 3. Offset Channel Selectivity 5. Adjust R305 for 0 dBm (775 mV RMS). 4. Intermodulation Rejection 6. Press the space bar to unkey the transmitter. 5. Spurious Rejection 7. Press F2 to advance to the next screen. 6.

  • Page 129: Transmitter Compressor Measurement

    ALIGNMENT AND TEST PROCEDURES 2. Press the space bar to key the transmitter. NOTE: An HP8901A modulation analyzer is required for this test. 3. Adjust U151 with the PgUp/PgDn and CurUp/ CurDn keys to achieve ±750 Hz ±50 Hz transmit 1.

  • Page 130: Audio/Data Level Adjustments

    ALIGNMENT AND TEST PROCEDURES 3. Press the space bar to key the transmitter. 4. Deviation shall be between 1.35 and 1.5 kHz. 5. Adjust 1 kHz signal to -8.2 dBm (300 mV RMS). Deviation shall be between 750 and 850 kHz. 6.

  • Page 131: Repeater Operation

    ALIGNMENT AND TEST PROCEDURES 7.6.9 REPEATER OPERATION 2. Verify that the repeater is programmed for "Stand Alone" mode in Setup Parameters-F4 (see Section New HSDB Test 4.3.1). 1. Switch settings on the MPC for RS-485 (new style) 3. The repeater is now in Normal Operation mode. operation are shown in Figure 7-14.

  • Page 132: Mac Alignment Points

    ALIGNMENT AND TEST PROCEDURES WATCH DOG S101 RNT RS-232 RESET P101 S102 J103 SEC AUDIO U149 TO RNT RX NET LEVEL SECONDARY AUDIO TO RNT A D LEVEL S100 J100 SEC AUDIO TEST POINT FROM RNT TO RNT EXTERNAL MODEM 2-3/4-5 NORMAL OPERATION 1-2/3-4 LTR DATA MODEM MAIN AUDIO...

  • Page 133: Main Processor Card Alignment Points

    ALIGNMENT AND TEST PROCEDURES 1 2 3 4 5 6 7 8 1 2 3 4 WATCHDOG RESET BALANCED RX/TX 1 2 3 1 2 3 HSDB 11.059 12 MULTI-NET EPROM MEMORY LOADING 1 10 USED WITH CR3/4 FOR ALARMS - MPC OPERATIONAL (BLINKING) - ON = HIGH POWER, OFF = LOW POWER - ON = LTR, OFF = MULTI-NET...

  • Page 134: Interface Alarm Card Alignment Points

    ALIGNMENT AND TEST PROCEDURES ALARM 1 ALARM 2 +15V +15V S500 S501 ALARM 3 ALARM 4 +15V +15V S502 S503 P500 J504 J503 ALARM 4 ALARM 3 OUTPUT OUTPUT 1-2 ALARM 1-2 ALARM 2-3 AD LEVEL 2-3 AD LEVEL CR525 +15V (GRN) CR523 +15V ACC (GRN)

  • Page 135: Servicing

    SERVICING SECTION 8 SERVICING 8.1 INTRODUCTION 8.2 SYNTHESIZER SERVICING 8.1.1 PERIODIC CHECKS 8.2.1 INTRODUCTION This repeater should be put on a regular mainte- Synthesizer malfunctions can be caused by no nance schedule and an accurate performance record VCO output, or the VCO is unlocked. The VCO can maintained.

  • Page 136: Tcxo Module

    SERVICING 8.2.2 TCXO MODULE Modulus Control Signal Check the signal at TCXO, pin 5. It should be 1. The frequency of the modulus control signal on 17.5 MHz for Y201 and Y401 at a level of approxi- TEST 1, pin 9 should be equal to the N counter out- mately 3V P-P.

  • Page 137: Calculating "N " And "A " Counter Divide Numbers

    SERVICING Measure the prescaler input frequency at f , pin "A" Counter 11. Then measure the output frequency at TEST 2, pin 13 and calculate the divide number. If the VCO is A Counter Divide Number = (VCO freq (MHz) ÷ .0125) - (N Cntr Div No x 64) not locked on frequency, the divide number should still be correct.

  • Page 138: Power Supply Rear View

    SERVICING AC FAIL +28V +15V +15V THERMAL SENSE ON/OFF Figure 8-3 POWER SUPPLY REAR VIEW CHARGER TEMP ACTIVE SWITCH REVERSE CHARGER BATTERY EARTH GROUND BATTERY FAULT LINE NEUTRAL Figure 8-4 POWER SUPPLY FRONT VIEW October 1999 Part No. 001-2009-201...

  • Page 139: Voltage Checks

    SERVICING Standby Battery Jack The Japanese EIA Standard may also utilize a bar to indicate the temperature coefficient. This provides a connection point for a +24V DC standby battery. Current is drawn from the battery Example: A2 - 100 pF NPO only when the repeater enable line is on and AC has failed, or no AC is connected.

  • Page 140: Chip Transistors And Diodes

    SERVICING Some resistors with a ±1% tolerance are identi- Table 8-2 CERAMIC CHIP CAP fied by a 4-digit number and others may not have a IDENTIFICATION marking. When identified with a 4-digit number, the first three digits are the value and the fourth is the mul- tiplier.

  • Page 141: Beryllium Product Warning

    SERVICING 8.7 BERYLLIUM PRODUCT WARNING Q501, Q502, Q503, R504, R505 in the 75W power amplifier and R685 R701, R702, R703, R716, R717, R730, Q502, Q701, Q702, Q703, Q704 in the 160W Power Amplifier contain Beryllium (BeO). Inhalation of dust or fumes may cause serious chronic lung disease.
  • Page 142 SERVICING October 1999 Part No. 001-2009-201...

  • Page 143: Parts List

    PARTS LIST SECTION 9 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 900 MHz LTR 75W REPEATER 900 MHz 75W PA/RFIB MODULE PART NO. 242-2009-232 PART NO. 023-2009-932 A 003 75W PA/RFIB module 023-2009-932 A 002 895 MHz drop-in circulator 585-0590-005 A 006 Tx/Rx module 023-2009-832...

  • Page 144: Transmit/Receive Module

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER Q 501* 30W 900 MHz 24V MRF894 576-0004-821 Q 502* 60W 800 MHz 24V MRF898 576-0004-820 Q 502* 60W 800 MHz 24V MRF898 576-0004-820 Q 701* 60W 800 MHz 24V MRF898 576-0004-820 Q 503* 60W 800 MHz 24V MRF898 576-0004-820 Q 702* 60W 800 MHz 24V MRF898...

  • Page 145: Transceiver Mechanical

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER EP001 Ferrite bead 517-2002-008 MP032 Dowel pin guide 013-1723-230 EP002 Ferrite bead 517-2002-009 EP010 3/8" heat shrink tubing 042-0241-556 NP001 Nameplate E.F. Johnson 559-5861-163 EP011 3/8" heat shrink tubing 042-0241-556 TRANSCEIVER MECHANICAL HW013 6-32 machine panhead philips 575-1606-014...

  • Page 146: External Connector Board

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER P 013 32-pin DIN female straight 515-7082-200 RF INTERFACE BOARD P 014 64-pin DIN female straight 515-7082-201 PART NO. 023-2008-110 P 015 32-pin DIN female straight 515-7082-200 .1 µF ±10% X7R chip P 016 64-pin DIN female straight 515-7082-201 C 101...
  • Page 147 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 10k ohm ±5% 1206 SMD F 101 2A 250V AC sub-min 534-0017-017 R 057 569-0115-103 10k ohm ±5% 1206 SMD F 102 2A 250V AC sub-min 534-0017-017 R 059 569-0115-103 43k ohm ±5% 1206 SMD R 061...
  • Page 148 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 20k ohm ±1% 1206 SMD 22k ohm ±5% 1206 SMD R 118 569-0111-430 R 166 569-0115-223 20k ohm ±1% 1206 SMD 1k ohm ±1% 1206 SMD R 119 569-0111-430 R 167 569-0111-301...

  • Page 149: Receive Vco

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 3 pF ±5% NPO 1206 chip RECEIVE VCO C 207 510-3602-309 33 pF ±5% NPO 1206 chip PART NO. 023-2009-800 C 208 510-3602-330 8.2 pF ±5% NPO 1206 chip C 209 510-3602-829 1 pF ±0.1 pF 150V chip...
  • Page 150 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER .1 µF ±10% X7R 1210 4.7 µF 16V tantalum SMD C 256 510-3607-104 C 308 510-2625-479 .1 µF ±10% X7R 1210 1 pF ±5% NPO 1206 chip C 257 510-3607-104 C 309 510-3602-109...
  • Page 151 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER CH202 2-cavity helical front end 015-0901-028 L 226 3T 22 AWG 0.05 ID SMD air 542-0015-003 CH203 1-cavity helical front end 015-0901-010 L 227 3T 22 AWG 0.05 ID SMD air 542-0015-003 L 228 4T 22 AWG 0.05 ID SMD air 542-0015-004 CR201 Hot carrier diode SOT-23...
  • Page 152 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 100 ohm ±5% 1206 SMD 1k ohm ±5% 1206 SMD R 220 569-0115-101 R 269 569-0115-102 180 ohm ±5% 1206 SMD 1k ohm ±5% 1206 SMD R 221 569-0115-181 R 270 569-0115-102...

  • Page 153: Transmit Vco

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER .022 µH inductor SMD TP001 Red tip jack, vert. 0.08 105-2002-211 L 805 542-9001-227 TP003 Red tip jack, vert. 0.08 105-2002-211 TP004 Red tip jack, vert. 0.08 105-2002-211 PC801 PC board 035-2009-800 TP005 Red tip jack, vert.
  • Page 154 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 27 pF ±5% NPO 1206 chip C 429 510-3602-270 CH400 Single helical cavity front end 015-0901-010 27 pF ±5% NPO 1206 chip C 430 510-3602-270 27 pF ±5% NPO 1206 chip C 431 510-3602-270 CR401 Si 9.1V zener SOT-23...
  • Page 155 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 100 ohm ±5% SMD 1206 10 ohm ±5% SMD 1206 R 410 569-0115-101 R 462 569-0115-100 1k ohm ±5% SMD 1206 100 ohm ±5% SMD 1206 R 411 569-0115-102 R 463 569-0115-101...
  • Page 156 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 1 µF 35V tantalum SMD .018 µF ±10% X7R 0805 chip 510-3605-183 C 510 510-2628-109 C 570 .018 µF ±10% X7R 0805 chip 510-3605-183 C 511 56 pF high Q .110 cube 510-3663-560 C 571 .1 µF 35V tantalum SMD...
  • Page 157 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 390 pF ±5% NPO 1206 chip Q 501* 30W 24V 900 MHz MRF-894 576-0004-821 C 506 510-3602-391 .018 µF ±10% X7R chip Q 502* 60W 24V 800 MHz MRF-898 576-0004-820 C 507 510-3605-183 39 pF ±5% NPO 1206 chip...
  • Page 158 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 4.7 µF 16V tantalum SMD 56 pF ±10% high Q cube C 555 510-2625-479 C 738 510-3663-560 4.7 µF 16V tantalum SMD 27 pF ±10% high Q cube C 556 510-2625-479 C 739...

  • Page 159: Forward/Reverse Power Detector

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 3.9k ohm ±5% 1206 SMD EP701 Ferrite bead SMD 1233 517-2503-010 R 521 569-0115-392 EP702 Ferrite bead SMD 1233 517-2503-010 R 685* 50 ohm 250W flange mt load 569-5001-003 EP703 Ferrite bead SMD 1233 517-2503-010 R 701* 100 ohm 20W flange mount...

  • Page 160: 900 Mhz 75W Pa Mechanical

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 4.7 µF 10V tantalum SMD 470 ohm ±5% 1206 SMD C 662 510-2624-479 R 667 569-0115-471 .001 µF ±5% NPO 1206 chip 510-3602-102 160 ohm ±5% 1206 SMD C 663 R 670 569-0115-161...

  • Page 161: 900 Mhz 160W Pa Mechanical

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER MP254 M PA plate align dowel pin 013-1723-216 MP268 M PA stop 013-1723-222 MP255 PA heat sink 014-0771-124 MP269 Predriver cover shield 017-2210-037 MP256 PA shield, left 017-2210-026 MP270 PA shield 017-2210-095 MP257 PA shield, top...

  • Page 162: Power Supply Main Board

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 800W POWER SUPPLY MAIN BOARD C 143 2700 µF 35V aluminum 510-4075-272 PART NO. 023-2000-810 C 144 2700 µF 35V aluminum 510-4075-272 C 145 2700 µF 35V aluminum 510-4075-272 A 002 Pin feed EPROM blank label 559-1154-004...
  • Page 163 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER C 198 1 µF 35V tantalum SMD 510-2628-109 CR111 Switching diode SOT-23 523-1504-002 C 199 6.8 µF 35V tantalum SMD 510-2635-689 CR112 Switch diode SOT-23 523-1504-017 C 200 6.8 µF 35V tantalum SMD 510-2635-689 CR113 5.1V zener SOT-23...
  • Page 164 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER F 102 10A 250V fastblow AGC fuse 534-0003-036 Q 111 Si NPN amp/sw SOT-23 576-0003-600 Q 112 Si NPN amp/sw SOT-23 576-0003-600 FH102 Fuse clip 534-1007-001 Q 114 PNP switching 576-0003-612 Q 115...
  • Page 165 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER R 126 10 ohm ±5% 1206 SMD 562-0115-100 R 175 1.8k ohm ±5% 1206 SMD 569-0115-182 R 127 1.27k ohm ±1% 1206 SMD 569-0111-311 R 176 100 ohm ±5% 1206 SMD 569-0115-101 R 128 51 ohm ±5% 2512 SMD...
  • Page 166 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER R 223 13k ohm ±5% 1206 SMD 569-0115-133 R 272 51 ohm ±5% 2512 SMD 569-0175-510 R 224 Zero ohm ±5% 1206 SMD 569-0115-001 R 273 1k ohm ±5% 1206 SMD 569-0115-102 R 225 68 ohm ±5% 1206 SMD...

  • Page 167: Ac Filter Board

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER U 112 PWM current mode ML4823 544-2002-034 RV002 Metal oxide varistor 569-3503-001 U 113 PWM current mode ML4823 544-2002-034 U 114 5V 3A regulator power supply 544-2003-098 W 001 Wire 1 assembly 023-2000-825 U 115 Programmable TL431AID...
  • Page 168 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER CR115 Switching diode SOT-23 523-1504-002 R 105 2k ohm ±5% 1206 SMD 569-0115-202 CR116 3A ultra-fast diode 523-1507-004 R 106 2k ohm ±5% 2512 SMD 569-0175-202 CR117 13V 1W zener SMT 523-2026-130 R 107 1k ohm ±5% 1206 SMD...

  • Page 169: Thermal Sensor Board

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER .0039 µF ±5% X7R 1206 R 159 180k ohm ±5% 1206 SMD 569-0115-184 C 903 510-3609-392 .0039 µF ±5% X7R 1206 R 160 10k ohm ±5% 1206 SMD 569-0115-103 C 904 510-3609-392...
  • Page 170 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER CR904 Dual switch diode SOT-23 523-1504-023 J 911 3-pin single inline header 515-7100-003 CR905 Dual switch diode SOT-23 523-1504-023 J 912 Rear connector housing 515-9031-234 CR906 Switching diode SOT-23 523-1504-002 J 920 18-terminal block connector...
  • Page 171 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER Zero ohm ±5% 1206 SMD Q 905 Si NPN SOT-23 576-0003-658 R 926 569-0115-001 100 ohm ±5% 1206 SMD Q 906 Si NPN SOT-23 576-0003-658 R 927 569-0115-101 150 ohm ±5% 1206 SMD Q 907 Si NPN SOT-23 576-0003-658...

  • Page 172: Ocxo Drawer Power Supply

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 39k ohm ±5% 1206 SMD C 112 4.7 µF 16V SMD tantalum R 974 569-0115-393 510-2625-479 51 ohm ±5% 1206 SMD R 975 569-0115-510 15k ohm ±5% 1206 SMD R 976 569-0115-153 CR101 200V 1.5A 1N4818...

  • Page 173: Main Processor Card

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER MAIN PROCESSOR CARD HW001 Panel fastener 537-0011-031 PART NO. 023-2000-310 HW001 Card injector/extractor nylon 537-9057-020 10 pF ±5% NPO 1206 chip C 001 510-3602-100 J 001 8-cond modular jack PC mt 515-2006-040 20 pF ±5% NPO 1206 chip C 002...

  • Page 174: Main Audio Card

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 10k ohm ±5% 1206 SMD R 026 569-0115-103 X 001 10-pos right angle IC socket 515-5008-270 10k ohm ±5% 1206 SMD R 027 569-0115-103 X 014 28-pin IC socket 515-5008-018 4.7k ohm ±5% 1206 SMD R 028...
  • Page 175 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 680 pF ±2% NPO 1206 .01 µF ±10% X7R chip C 127 510-3616-681 C 177 510-3606-103 .0033 µF ±2% NPO 1206 .01 µF ±10% X7R chip C 128 510-3616-332 C 178 510-3606-103...
  • Page 176 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER .01 µF ±10% X7R chip C 224 510-3606-103 C 285 470 µF 25V radial low temp 510-4064-471 .01 µF ±10% X7R chip 10 µF tantalum SMD C 225 510-3606-103 C 286 510-2625-100...
  • Page 177 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 1M ohm ±5% 1206 SMD HW102 Rivet snap 0.142 dia 574-9015-050 R 124 569-0115-105 100k ohm ±5% 1206 SMD R 125 569-0115-104 100k ohm ±5% 1206 SMD J 100 Green horizontal tip jack .080 105-2204-105 R 126 569-0115-104...
  • Page 178 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 4.3k ohm ±5% 1206 SMD 6.8k ohm ±5% 1206 SMD R 175 569-0115-432 R 223 569-0115-682 6.8k ohm ±5% 1206 SMD 10k ohm ±5% 1206 SMD R 176 569-0115-682 R 225 569-0115-103...
  • Page 179 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 18k ohm ±5% 1206 SMD R 276 569-0115-183 RT100 10k ohm chip thermistor 569-3013-007 5.1k ohm ±5% 1206 SMD R 277 569-0115-512 150k ohm ±5% 1206 SMD R 279 569-0115-154 S 100 8-pos DIP switch...

  • Page 180: Interface Alarm Card

    PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER .01 µF ±10% X7R chip U 157 D flip flop SOIC 74HC574 544-3766-574 C 531 510-3606-103 1000 µF 25V aluminum radial 510-4225-102 U 158 Quad analog sw SOIC DG202 544-3003-001 C 532 .01 µF ±10% X7R chip U 159 Quad analog sw SOIC DG202 544-3003-001...
  • Page 181 PARTS LIST SYMBOL PART SYMBOL PART NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION NUMBER 4.7k ohm ±5% 1206 SMD J 504 3-pin single inline header 515-7100-003 R 524 569-0115-472 10k ohm ±1% 1206 SMD J 505 4-pin single inline header 515-7100-004 R 525 569-0111-401 10k ohm ±1% 1206 SMD R 526...
  • Page 182 PARTS LIST SYMBOL PART NUMBER DESCRIPTION NUMBER S 500 4-pos recessed DIP switch 583-5002-104 S 501 4-pos recessed DIP switch 583-5002-104 S 502 4-pos recessed DIP switch 583-5002-104 S 503 4-pos recessed DIP switch 583-5002-104 S 508 Toggle switch on/on rt angle 583-0006-014 U 500 1 of 16 demux SOIC 74HC154 544-3766-154 U 501 1 of 16 demux SOIC 74HC154 544-3766-154...

  • Page 183: Schematics And Component Layouts

    SCHEMATICS AND COMPONENT LAYOUTS SECTION 10 SCHEMATICS AND COMPONENT LAYOUTS TRANSISTORS TRANSISTORS Part Number Basing Diagram Identification 576-0001-300 VIEW VIEW 576-0002-603 576-0003-600 576-0003-602 R2/R3 576-0003-604 3604 576-0003-612 576-0003-636 576-0003-657 576-0003-658 576-0004-098 VIEW VIEW 576-0004-820 VIEW 576-0004-821 576-0006-109 DIODES 523-1504-002 523-1504-012 523-1504-015 523-1504-016 VIEW...

  • Page 184: Rf Module Interface Connector

    SCHEMATICS AND COMPONENT LAYOUTS Figure 10-1 RF MODULE INTERFACE CONNECTOR Figure 10-2 BACKPLANE CABLE CONNECTIONS October 1999 Part No. 001-2009-201 10-2...

  • Page 185: Ocxo Drawer Front/Rear Panel

    OCXO DRAWER FRONT/REAR PANEL FIGURE 10-3 OCXO DRAWER FIGURE 10-6 REPEATER REAR VIEW FIGURE 10-4 RFIC EXCITER/RECEIVER REPEATER FRONT VIEW REPEATER CABINET EXPLODED VIEW FIGURE 10-5 FIGURE 10-7 October 1999 10-3 Part No. 001-2009-201...
  • Page 186 RF INTERFACE REAR CONNECTOR BOARD BACKPLANE (023-2008-110) BACKPLANE A9 FWD/REV PWR DETECT P3-P5-P7-P12 P14-P16-P18 J101 PWR OUT W115 W655 24 HSDB+ +15V WO 655 ISOLATOR WO 652 W126 W656 56 HSDB- RF MUX 3 INH 14 RF MUX 3 INH REFLECTED POWER WO 656 R685...

  • Page 187: Backplane Interconnect

    P3-P5-P7-P12-P14-P16-P18 P3-P5-P7-P12-P14-P16-P18 IAC SLOT 33 A18 +15V +15V WO 13 34 A16 FILTERED HSDB+ 6 HSDB- 5 35 A14 IRDB+ 4 IRDB- 3 36 A12 TLA+ 2 11 D7 TLA- 1 43 D6 12 D5 44 D4 13 D3 45 D2 14 D1 46 D0 REPEATER I/O...

  • Page 188: Rf Interface Board Component Layout

    Q107 CR104 U108 C128 R178 R171 R180 R169 R177 J103 R179 J102 WO135 R193 R176 WO117 GROUND WO133 C114 + R175 WO110 WO111 R174 WO131 C119 WO129 U105 U104 U110 R198 WO113 WO112 R147 R199 WO105 F102 R148 Q103 L101 U101 WO104 WO106...

  • Page 189: Rf Interface Board Schematic

    R137 R119 +26V PC STR 2 R104 F102 P102 +26V IN SOURCE L101 270k R138 R120 WO143 R135 R121 +26V P101 +26V IN + C117 C110 +15V 1000 WO145 R122 R136 R123 P104 GROUND R112 R103 Q104 P105 GROUND R111 3657 270k U103...

  • Page 190: Receiver Component Layout

    J201 C298 WO32 R303 C341 C353 WO16 C352 C342 C369 R318 C313 C354 C339 R231 C230 C287 R317 R232 C228 C292 C324 R234 C286 C227 R224 R222 C291 WO202 R281 R264 R216 R321 R241 R312 R288 U206 C325 CR201 R315 C328 C206 WO14...

  • Page 191: Receive Vco Component Layout

    SCHEMATICS AND COMPONENT LAYOUTS Figure 10-14 RECEIVE VCO COMPONENT LAYOUT October 1999 Part No. 001-2009-201 10-9...

  • Page 192: Receive Vco Schematic

    SCHEMATICS AND COMPONENT LAYOUTS NOTES: +12V 1. RESISTORS ARE IN OHMS AND CAPACITORS IN MICROFARADS UNLESS OTHERWISE SPECIFIED. TRANSMIT VCO ONLY. C807 R801 27pF DESIG 2.7pF 2.2pF C804 .47uF .1uF C805 C808 4.7uF C806 R802 27pF 3.9pF 3.3pF C812 3.6k 5.6pF 4.7pF C813...

  • Page 193: Receiver Schematic

    +12V + C336 C311 R202 R203 C337 .001 56pF +12V + C213 + C203 C204 C212 C321 R313 33pF .001 L204 L205 L206 L201 L202 L203 RF AMP R208 IF AMP MIXER 52.95 MHz 1.8k C205 C208 C209 4-POLE C210 CRYSTAL FILTER 52.95 MHz 6.8pF...

  • Page 194: Exciter Component Layout

    J401 WO431 WO417 J402 C491 C436 C494 C493 WO425 C489 WO427 WO429 C466 C438 C495 R491 R427 R449 C467 + R488 R403 R402 R425 U407 R489 C469 + EP404 R487 R415 + C476 R412 J403 C408 C460 R411 C406+ R476 C462 C409 R424...

  • Page 195: Transmit Vco Component Layout

    SCHEMATICS AND COMPONENT LAYOUTS *C814 IS PLACED ON TOP OF R807 C814* Figure 10-18 TRANSMIT VCO COMPONENT LAYOUT October 1999 Part No. 001-2009-201 10-13...

  • Page 196: Transmit Vco Schematic

    SCHEMATICS AND COMPONENT LAYOUTS NOTES: +12V 1. RESISTORS ARE IN OHMS AND CAPACITORS IN MICROFARADS UNLESS OTHERWISE SPECIFIED. TRANSMIT VCO ONLY. C807 R801 27pF DESIG 2.2pF 2.7pF C804 .47uF .1uF C805 C808 4.7uF C806 R802 27pF 3.9pF 3.3pF C812 3.6k 4.7pF 5.6pF C813...

  • Page 197: Exciter Schematic

    +12V R418 C411 R485 L401 R420 C412 10nH 2.7k 27pF F IN 1 C405 C402 C477 Q401 .001 27pF 3658 C414 R421 C415 C413 3.3k 100pF .001 Q402 R422 3658 3.3k J403 BUFFERED R423 OSC IN OCXO IN C400 U401 27pF MC145151DW2 C403...

  • Page 198: Power Amplifier Component Layout

    WO508 WO510 WO516 WO512 WO509 C585 R526 C577+ C584 WO503 U504 R524 +C582 C575 WO511 +C576 R521 WO502 WO501 WO504 WO505 C574 C573 R501 CR503 R520 R519 R503 WO521 EP514 WO513 C530 C556 C529 Q503 C567 C528 C531 + C534 + C533 C564 R507...

  • Page 199: Power Amplifier Schematic

    +26V +15V EP501 EP502 EP508 EP507 WO 505 POWER CONTROL + C510 C508 C509 + C505 C506 C507 C518 C527 C528 C530 C529 + C531 + C534 C535 EP506 56pF 27pF .018 56pF 56pF 56pF .018 .001 .018 EP504 EP520 + C516 C515 C517...

  • Page 200: Power Amplifier Component Layout

    WO507 WO504A EP715 EP716 EP714 WO521 WO519 C563 C747 R514 C556 + C562 WO520 WO508 R724 C564 R502 U504 WO514A WO509 R512 C745 EP710 +C560 C518 R505 C553 C760 R506 C519+ Q704 +C554 R507 R725 C503 C758 EP501 C506 WO505 C508 C507 Q501...

  • Page 201: W Power Amplifier Schematic

    +15V EP503 DRIVER EP507 EP508 POWER C526 + C517 C528 C529 +26V CONTROL .018 56pF 56pF +15V WO505 C543 C544 C546 C545 + C547 + C549 C550 56pF 56pF .001 .018 .018 EP505 EP509 EP504 EP501 EP513 C548 + C531 + C532 C533 C536...

  • Page 202: Forward/Reverse Power Board Component Layout

    WO651 WO650 WO653 L657 MP652 MP651 R675 R678 L656 L653 CR651 C667 R673 C684 C654 C683 R658 U652 U653 R680 R659 C669 C678 C670 C682 R683 R688 C661 R663 C676 R682 FORWARD/REVERSE POWER BOARD COMPONENT LAYOUT FIGURE 10-25 October 1999 10-20 Part No.

  • Page 203: Forward/Reverse Power Board Schematic

    RF OUT WO 651 WO 650 WO 653 REFLECTIVE POWER LOAD RF POWER IN CIRCULATOR R685 L657 DANGER 12.5nH BERYLLIUM PRODUCT. INHALATION OF 250W DUST OR FUMES MAY CAUSE SERIOUS CHRONIC LUNG DISEASE. SEE MATERIAL SAFETY SHEETS FOR FURHTER DETAILS. R651 R654 L651...

  • Page 204: Ocxo Component Layout

    OCXO 1 OCXO 2 DC INPUTS +15V DC ON/OFF TEST TEST P913 +15V P912 +15V INPUT BNC 10 MHz CR908 C926 10 MHz AC/DC REF OUTPUT FROM W W V REF OUTPUT SENSE WO904 WO903 WO902 C913 C932 C904 C924 J909 DC ALARM J902...

  • Page 205: Ocxo Schematic

    J901 RF OUTPUT ALARM 7 RF ALARM OUT + INPUT BNC J902 WO 902 10 MHz FROM 8 RF ALARM OUT - C901 U906A L904 L905 L906 C916 150pF DS7830J R903 C902 .39uH 1.2uH .39uH WO 904 10 MHz CLOSE U901B REF OUTPUT UPON...

  • Page 206: Ocxo Power Supply Component Layout

    J101 230V AC 115V AC S101 U101 AC INPUT AC FUSE F101 U102 C103 C111 C110 + C105 + C102 + C112 C109 + R102 R101 C107 C104 + C106 T101 C101 C108 CR105 WO101 WO102 WO103 WO104 AC SENSE +15V GROUND OCXO POWER SUPPLY COMPONENT LAYOUT...

  • Page 207: Ocxo Power Supply Schematic

    S101 T101 WO101 AC SENSE 24VA 115V WO103 +15V OUT F101 CR101 CR102 J101 VOUT A +13.8V +15V U101 U102 V IN CR105 LM117T VOUT B V IN VOUT A WO102 +5V OUT CR103 C103 C101 C102 LM29940T-5 230V .001 CR104 1000 C107...

  • Page 208: Main Processor Card Component Layout

    MAIN PROCESSOR CARD COMPONENT LAYOUT FIGURE 10-31 October 1999 Part No. 001-2009-201 10-26...

  • Page 209: Main Processor Card Schematic (1 Of 2)

    MAIN MICROPROCESSOR FLASH MEMORY EPROM +15V A0 42 U15F 2.2k OPERATIONAL A1 10 BLINKING A2 41 U15E 2.2k ON = HIGH POWER 60L256 OFF = LOW POWER 28F001BX A4 40 U15D UPD70320 2.2k ON = LTR OFF = MULTI-NET A6 39 U15C 2.2k ALARM...

  • Page 210: Main Processor Card Schematic (2 Of 2)

    74HC32 U4-14 (1) U20D MSTB P1-16 (1) U4-15 (1) V25 DATA BUS (7:0) RX FIFO TX FIFO U27-67 (1) 74HC7030 U27-11 (1) 74HC7030 LOWER ADDRESS LATCH U27-68 (1) 2 D0 74HC573 25 DOR C EN HSDB MICROPROCESSOR EPROM P3-8 P3-7 +12V 2 P1-1 11 IO0...

  • Page 211: Main Audio Card Component Layout (Component Side)

    C179 R248 C235+ R298 R179 R180 R256 C193 C224 R282 R286 R177 R211 C266 C264 R317 R210 + C255 R207 C194 R208 R258 C188 R298 R314 R209 R267 R264 C209 C218 C223 RT100 C213 R118 R225 C210 C265 R114 R117 C117 R214 R295...

  • Page 212: Main Audio Card Component Layout (Opposite Component Side)

    R278 R318 CR111 R282 CR112 C196 R221 C273 R202 C141 C195 R232 R204 R201 U100 R157 R174 R274 C150 R176 R287 U126 R158 R168 R156 C146 R173 R165 C215 C142 U129 R167 R162 C165 C182 C136 C201 R320 R271 C267 + C198 R212 R213...

  • Page 213: Main Audio Card Schematic (1 Of 3)

    U115A-1 (2) VOTER AUDIO MUTE GATE U108 74HC573 U114D-16 (2) LOCAL AUDIO MUTE GATE U113C-9 (2) RX MUTE GATE U114A-1 (2) RX OPTION GATE ADDRESS LATCH U115B-8 (2) RX VOICE GATE U116B-8 (2) RX AUDIO GATE U133 U115C-9 (2) RX VOICE TO BACKPLANE 74HC574 Q8 12 U116A-1 (2) FSK TO AUDIO GATE...
  • Page 214 + C295 U114D + C251 LOCAL AUDIO C254 LOCAL AUDIO R254 ON/OFF/ AMPLIFIER LOCAL AUDIO MUTE GATE C286 OUTPUT R291 C285 J104 R236 EXTERNAL C235 R249 R248 R233 P100 SPEAKER 120k 100k U132 R292 R290 VOTER AUDIO 25 TDA2003 U108-18 (1) J101 C100 U108-19 (1)

  • Page 215: Main Audio Card Schematic (3 Of 3)

    S100-1 (2) C154 S100 R194 R191 P100 AUDIO AMPLIFIER TXS+ 3 U153D R196 U131C TXS TO FSK R265 R264 C156 R242 SECONDARY GATE 3303 2.2k 100k AUDIO U110-5 (2) FROM RNT U153A TO TX FSK R198 J103 R195 U131D DATA LEVEL C153 R193 100k...

  • Page 216: Interface Alarm Card Component Layout

    Q504 Q505 R551 R512 U521 R563 CR528 R575 U522 U518 C506 U519 J505 R505 C526 U508 R554 R568 R543 U501 R510 U506 U518 CR522 CR510 CR511 U500 U509 U507 U518 C503 R573 R574 C528 U518 R571 R528 R541 R553 R567 U503 C506 Q502...

  • Page 217: Interface Alarm Card Schematic

    P500 P500 D0 46 R536 ALARM 1 IN + D1 14 CR507 S500 R502 430 D2 45 P501 ADDRESS LATCH R541 200 D3 13 R520 CR503 12 RF MUX 1 INH +15V U508B 2.7k U505 D4 44 13 RF MUX 2 INH 74HC574 U501 U518...

  • Page 218: Backplane Component Layout (Card Side)

    1 33 1 33 1 33 1 33 1 33 1 33 1 33 1 33 32 64 32 64 32 64 32 64 32 64 32 64 32 64 32 64 1 17 1 17 1 17 1 17 1 17 1 17 1 17...

  • Page 219: Backplane Component Layout (Cable Side)

    25 26 WO16 WO17 WO4 WO1 WO13 WO5 WO8 33 34 33 34 October 1999 BACKPLANE COMPONENT LAYOUT (CABLE SIDE) Part No. 001-2009-201 FIGURE10-42 10-37...

  • Page 220: Backplane Schematic

    IAC SLOT P3, P5, P7, P12, P14, P16, P18 ALARM 1 IN + ALARM 1 IN - ALARM 2 IN + ALARM 2 IN - ALARM 3 IN + ALARM 3 IN - ALARM 4 IN + ALARM 4 IN - SQUELCH ENABLE IAC 41 EXT REQ 2...

  • Page 221: Power Supply Component Layout (Opposite Component Side)

    R216 C213 C214 Q126 Q102 U120 C191 R249 R250 R280 R211 R255 R222 C235 U119 R279 R246 R215 R235 C171 R198 R239 R236 R217 R199 R189 R237 R200 CR130 C170 U121 R210 R242 CR124 R205 R238 R209 R243 R206 R201 U122 R276 CR125...

  • Page 222: Power Supply Component Layout (Component Side)

    CR129 RT101 RT102 CR135 C165 C188 EP105 W113 W111 C166 R254 W109 EP101 R216 C187 C209 W115 C169 T108 T109 L105 W107 L107 C163 C186 T101 Q132 CR132 CR126 Q125 U114 U111 C205 EP103 R113 C101 EP104 C106 J102 R114 J101 Q116 CR145 CR109...

  • Page 223: Power Supply Schematic (1 Of 2)

    18,19,20 PRE-CONTROLLER 16,17 +15V 14,15 POWER FACTOR CHOKE R117 L107 12,13 + C105 CR145 C104 R128 +400V CR112 CR106 T105 9,10 EP108 150V DC R116 + C106 + C107 + C110 + C111 R311 R121 IN RUSH CURRENT CR105 BATTERY BACKUP 1500 1500 100k...

  • Page 224: Power Supply Schematic (2 Of 2)

    +15V BUCK CONTOLLER I REF U112 R233 R234 C182 470pF 3.3k V REF R228 R220 C173 5 R T R223 EA OUT L103 C175 WO 115 HIGH CURRENT OUT + C166 WO 107 C173 + C165 C167 R215 + C169 C170 8 S S +15V DC OUTPUT...

  • Page 225: Power Supply Filter Board Component Layout

    POWER SUPPLY FILTER BOARD COMPONENT LAYOUT FIGURE 10-48 1.8uH 8.67nH AC HOT WO1 AC HOT .0022 EARTH GROUND WO5 POS OUT .0022 NEUTRAL WO3 NEUTRAL CHASSIS WO4 NEG GROUND GRN/YEL WO2 CHASSIS GND POWER SUPPLY FILTER BOARD SCHEMATIC FIGURE 10-49 October 1999 Part No.

  • Page 226: Battery Back-Up Component Layout

    C131 CR101 C132 C155 C114 R101 C130 W106 C129 E C B W103 R143 Q105 F101 R157 R158 CR118 C107 EP102 C105 Q111 W102 K101 MH107 C126 R111 C101 CR113 R165 EP101 R104 L101 R103 R105 R138 CR102 C119 R139 R106 EP103 R140...

  • Page 227: Battery Back-Up Schematic

    BATTERY +24V F101 HIGH CURRENT +26V INPUT RECTIFIER FILTER PROTECTION ON/OFF TRACE (30A) C101 R111 REGULATOR Q104 CR109 CR116 +24V L101 2021 BATTERY CHARGER +67V BATTERY U107 OUTPUT V OUT LM317M (2.2A MAX) + C119 + C105 + C110 + C111 C106 C109 Q105...

  • Page 228: Power Cable Connector And Schematic

    EP106 C106 EP101 EXPAND IN (WO101 MAC) C101 C103 EXP CAP GCELL IN 1 R101 C104 3.9k RECT IN 1 POWER HARNESS C102 V REF EP102 U101 EXP OUT EXPAND OUT +26.5V SA577D C109 R103 (WO102 MAC) 2.7k COMP CAP1 RECT IN 2 GROUND C105...
  • Page 229 APPENDIX A 900 MHz CHANNEL FREQUENCY CHART Program Repeater Repeater Program Repeater Repeater Channel Channel Transmit Receive Channel Channel Transmit Receive Number Number Frequency Frequency Number Number Frequency Frequency 935.0125 896.0125 935.5625 896.5625 935.0250 896.0250 935.5750 896.5750 935.0375 896.0375 935.5875 896.5875 935.0500 896.0500...

  • Page 230: 900 Mhz Channel Frequency Chart

    900 MHz CHANNEL FREQUENCY CHART Program Repeater Repeater Program Repeater Repeater Channel Channel Transmit Receive Channel Channel Transmit Receive Number Number Frequency Frequency Number Number Frequency Frequency 936.1125 897.1125 936.7125 897.7125 936.1250 897.1250 936.7250 897.7250 936.1375 897.1375 936.7375 897.7375 936.1500 897.1500 936.7500 897.7500...
  • Page 231 900 MHz CHANNEL FREQUENCY CHART Program Repeater Repeater Program Repeater Repeater Channel Channel Transmit Receive Channel Channel Transmit Receive Number Number Frequency Frequency Number Number Frequency Frequency 937.3125 898.3125 937.9125 898.9125 937.3250 898.3250 937.9250 898.9250 937.3375 898.3375 937.9375 898.9375 937.3500 898.3500 937.9500 898.9500...
  • Page 232 900 MHz CHANNEL FREQUENCY CHART Program Repeater Repeater Program Repeater Repeater Channel Channel Transmit Receive Channel Channel Transmit Receive Number Number Frequency Frequency Number Number Frequency Frequency 938.5125 899.5125 939.1125 900.1125 938.5250 899.5250 939.1250 900.1250 938.5375 899.5375 939.1375 900.1375 938.5500 899.5500 939.1500 900.1500...
  • Page 233 900 MHz CHANNEL FREQUENCY CHART Program Repeater Repeater Channel Channel Transmit Receive Number Number Frequency Frequency 939.7125 900.7125 939.7250 900.7250 939.7375 900.7375 939.7500 900.7500 939.7625 900.7625 939.7750 900.7750 939.7875 900.7875 939.8000 900.8000 939.8125 900.8125 939.8250 900.8250 939.8375 900.8375 939.8500 900.8500 939.8625 900.8625 939.8750...
  • Page 234 900 MHz CHANNEL FREQUENCY CHART This page intentionally left blank. October 1999 Part No. 001-2009-201...

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