Viking 242-2009-632 Service Manual
  1. Manuals
  2. Brands
  3. Viking Manuals
  4. Repeater
  5. 242-2009-632
  6. Service manual
Viking 242-2009-632 Service Manual

Viking 242-2009-632 Service Manual

900 mhz ltr-net 75w-160w repeater
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
®
VIKING
VX
®
900 MHz LTR-Net
75W-160W Repeater
Part No. 242-2009-632/634
First Printing
March 1999
Part No. 001-2009-600
3-99mwp
Printed in U.S.A.
October 1995
1-1
Part No. 001-2008-202

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 242-2009-632 and is the answer not in the manual?

Questions and answers

Related Manuals for Viking 242-2009-632

Summary of Contents for Viking 242-2009-632

  • Page 1 SERVICE MANUAL ® VIKING ® 900 MHz LTR-Net 75W-160W Repeater Part No. 242-2009-632/634 First Printing March 1999 Part No. 001-2009-600 3-99mwp Printed in U.S.A. October 1995 Part No. 001-2008-202...
  • Page 2 October 1995 Part No. 001-2008-202...

  • Page 3: Safety Information

    Transcrypt International Inc. will not be liable for any misunderstanding due to misinformation or errors found in this document. LTR, Multi-Net, LTR-Net, Viking Head/EFJohnson Logo, Call Guard and SUMMIT are registered trademarks of Transcrypt International, Inc. 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

    INTRODUCTION AND OPERATION SCOPE OF MANUAL ............... 1-1 REPEATER IDENTIFICATION .
  • Page 6 VIKING VX CONNECTION........
  • Page 7 TEST ..................4-10 EXCITER .
  • Page 8 TABLE OF CONTENTS (CONT’D) LOCK DETECT ................6-7 BUFFER AMPLIFIER .
  • Page 9 TABLE OF CONTENTS (CONT’D) BATTERY BACK-UP MODULE............. 6-30 OPERATION .
  • Page 10 TABLE OF CONTENTS (CONT’D) J500 A D LEVEL TEST POINT ............. . 6-51 J501 GROUND .
  • Page 11 TABLE OF CONTENTS (CONT’D) 7.10 BATTERY CHARGER SECTION ............7-24 SERVICING INTRODUCTION .
  • Page 12 TABLE OF CONTENTS (CONT’D) 2000 SERIES REPEATER POWER SUPPLY WIREHARNESS........9-19 800W POWER SUPPLY MAIN BOARD .
  • Page 13 10-40 INTERFACE ALARM CARD SCHEMATIC ........... 10-35 10-41 BACKPLANE COMPONENT LAYOUT (CARD SIDE) .
  • Page 14 TABLE OF CONTENTS (CONT’D) REPEATER CONFIGURATION ............. . 4-4 4-10 INPUT ALARMS .
  • Page 15 VIKING VX REPEATER ACCESSORIES ........
  • Page 16 TABLE OF CONTENTS (CONT’D)

  • Page 17: Section 1 Introduction And Operation

    3 = 12.5 kHz 6 = LTR-Net 1.4 REPEATER DESCRIPTION The VIKING VX 900 MHz repeater is designed for operation in a LTR-Net and LTR system. It oper- ates on the 900 MHz channels from 935-940 MHz (repeater transmit). The repeater receive frequencies are 39 MHz below these frequencies (896-901 MHz).

  • Page 18: Ltr-Net Signaling

    1.14 and 5 for more information on LTR-Net equip- ment and features). March 1999 Part No. 001-2009-600 1.6 ACCESSORIES The accessories available for the Viking VX LTR repeater are listed in Table 1-1. A brief description of some of these accessories follows. Table 1-1 VIKING VX REPEATER ACCESSORIES...

  • Page 19: Product Warranty

    2000 Series Service Kit- This kit includes an extender card, extender cables, TIC bias cable and programming cable. These items are used when tuning the repeater and while troubleshooting. Battery Backup Option - It includes the +26V DC bat- tery backup module that resides in the power supply and the necessary interconnect cabling to connect the repeater to the batteries (see Section 1.5).

  • Page 20: Factory Returns

    INTRODUCTION AND OPERATION you. When you enter some numbers, another number is requested to further categorize the type of informa- tion you need. You may also contact the Customer Service Department by mail. Please include all information that may be helpful in solving your problem. The mailing address is as follows: Transcrypt International, Inc.

  • Page 21: Repeater Operation

    1.13 REPEATER OPERATION 1.13.1 MAIN PROCESSOR CARD (MPC) Refer to Figure 1-2. • Programming Jack J1 provides input connection from the computer and the "flash memory" in the MPC. The program- ming information in an IBM PC programs the MPC directly from the serial card through an interconnect cable to the COM1 or COM2 port.

  • Page 22: Active Repeater Alarms

    INTRODUCTION AND OPERATION Table 1-2 ACTIVE REPEATER ALARMS Alarm No. March 1999 Part No. 001-2009-600 Test Mode IAC input 1 Active IAC input 2 Active IAC input 3 Active IAC input 4 Active IAC input 5 Active IAC input 6 Active IAC input 7 Active IAC input 8 Active MAC Processor Alarm...

  • Page 23: Main Audio Card (Mac)

    1.13.3 MAIN AUDIO CARD (MAC) Refer to Figure 1-2. • External Speaker Jack J104 provides repeater audio output to an external speaker. The local volume control adjusts the volume level of this speaker. • Speaker/Microphone Jacks J102 provides audio input from a microphone. J101 provides the receive audio to the microphone.

  • Page 24: Power Supply

    INTRODUCTION AND OPERATION 1.13.5 POWER SUPPLY The 2000 Series Repeater Power Supply is a quad output 800W supply with power factor correction. A battery back-up module, PN 023-2000-830, can be added to the power supply to provide automatic bat- tery revert in the event of AC power failure (see Sec- tion 1.4) The Battery Back-Up module charges the batteries when AC is present at the power supply (see Section 1.5 and 8.6).

  • Page 25: Ltr-Net System Components

    LTR-Net REPEATERS (UP TO 20 PER SWITCH) MOBILE TRANSCEIVER MOBILE TRANSCEIVER CONVENTIONAL MOBILE TRANSCEIVER Figure 1-3 LTR-Net SYSTEM COMPONENTS Repeater Connection To Switch The repeaters can be located at the same Locality as the Switch or they may be located at a Locality that is many miles from the Switch.

  • Page 26: Switch

    INTRODUCTION AND OPERATION 1.14.4 SWITCH The Switch can connect several different forms of communication together to form a communication net- work that requires the Call Processor. It has up to six shelves with 12 or 16 device slots each (72 or 96 slots available) and up to three racks (for 216 or 288 slots).

  • Page 27: Telephone Interconnect And Data Transmission

    1.14.11 TELEPHONE INTERCONNECT AND DATA TRANSMISSION Mobile transceivers can be used to access the PSTN (Public Switched Telephone Network). How- ever, this interconnect operation must be on a second- ary basis to dispatch operation. An exception is when the trunked system or channel is assigned exclusively to one user.

  • Page 28: Group Identification Calls

    INTRODUCTION AND OPERATION Unique IDs also permit individual mobile units to be called using the special calls described in the pre- ceding section. Calls can also be made to individual transceivers using standard call Group IDs 1-239 if an ID is assigned to only one transceiver. 1.15.3 GROUP IDENTIFICATION CALLS The Group ID (1-239) is assigned to each LTR- Net Home Repeater.

  • Page 29: Specifications

    GENERAL Frequency Range Dimensions AC Voltage/Frequency AC Current (at 117V AC) AC Input Power DC Current at 26.5V DC Number of Channels Channel Spacing Channel Resolution Temperature Range Duty Cycle FCC Type Acceptance FCC Compliance RECEIVER 12 dB SINAD 20 dB Quieting Signal Displacement Bandwidth Adjacent Channel Rejection Intermodulation Rejection...
  • Page 30 INTRODUCTION AND OPERATION 2000 OCXO DRAWER Size Weight Shipping Weight Operational Temperature Range AC Voltage/Frequency DC Voltage (w/2 oscillators) DC Voltage (optiona external supply) DC Current (w/2 oscillators) Frequency Reference Signal Outputs External 10 MHz Signal Input Level Output Amplitude Overall Oscillator Output Stability Oscillator Temperature Stability Oscillator Aging...

  • Page 31: Section 2 Installation

    Repeaters are installed at a site. This might require air conditioning the site. 2.4 AC POWER The AC power source to the Viking VX Repeater can be 120V AC or 240V AC. Nothing need be done to the power supply for 240V AC operation. How- ever, a 240V AC outlet requires that the 120V AC power plug be replaced.

  • Page 32: Battery Backup

    Repeater cabinet. Future system expansion should be considered when electrical work is being planned for the initial system. The Viking VX Repeater power supply can be equipped with an optional 24V DC back-up in the event of AC power failure. Since the transmitter...

  • Page 33: Power Cable Connector And Schematic

    VENT PERMANENT DAMAGE TO THE REPEATER. As in any fixed radio installation, measures should be taken to reduce the possibility of lightning damage to the Viking VX equipment. Proper ground- ing eliminates shock hazard, protects against electro- magnetic interference (EMI) and lightning.

  • Page 34: Protection Guidelines

    INSTALLATION Ground each piece of equipment separately. Do not ground one piece of equipment by connecting it to another grounded piece of equipment. A good DC ground must be found or created at the site. Rooftop site grounds can be researched through the building management or architects.

  • Page 35: Unpacking And Inspection

    • 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 The Repeater is shipped securely crated for trans- portation.

  • Page 36: Repeater Data Bus Installation

    A5 on the back of the repeater (see Figure 2-16). A 50 ohm termination is not required for VIKING VX repeaters. 2.9.1 MPC DATA BUS SWITCH SETTINGS Switch settings on the MPC for the two types of installations require S2 and S3 sections to be switched as indicated in Figure 2-5.

  • Page 37: Connecting Receive And Transmit Antennas

    2.10 CONNECTING RECEIVE AND TRANSMIT ANTENNAS Receive and Transmit antenna connector loca- tions are shown in Figure 2-7. Although each trans- mitter and receiver could be connected to a separate antenna, this is usually not done because of the large number of antennas required by a multiple repeater installation.

  • Page 38: Ocxo Drawer Connections

    TxS+ J2-16 TxS- Figure 2-12 LTR-Net VOICE/DATA LINK 2.12 OCXO DRAWER CONNECTIONS 2.12.1 VIKING VX CONNECTION These guidelines should be followed when using 2009 series repeaters with a 2000 OCXO drawer, Part No. 023-2000-925. • One 1.25 MHz output on the 2000 OCXO drawer is connected to the 1.25 MHz Input on each 2009...

  • Page 39: Attenuator Settings

    INSTALLATION A010 IN SPLITTER SHELF 36 dB ATTENUATION 23 dB ATTENUATION 19 dB ATTENUATION Figure 2-13 ATTENUATOR SETTINGS March 1999 Part No. 001-2009-600...

  • Page 40: Single Repeater Installation

    INSTALLATION Figure 2-14 SINGLE REPEATER INSTALLATION Figure 2-15 TWO REPEATER INSTALLATION March 1999 Part No. 001-2009-600 TO GPS 10 MHz 1.25 MHz OUTPUTS SERIES 2000 OCXO DRAWER (023-2000-925) 10 MHz B- B+ TEMP 1.25 MHz MPC SWITCHES/JUMPERS HSDB CODE SELECTION 10 MHz SPLITTER +12V TO GPS 10 MHz...

  • Page 41: Three Or More Repeaters Installation

    10 MHz SPLITTER +12V TO GPS 10 MHz 1.25 MHz OUTPUTS SERIES 2000 OCXO DRAWER (023-2000-925) 10 MHz 1.25 MHz MPC SWITCHES/JUMPERS END REPEATER 10 MHz 1.25 MHz MPC SWITCHES/JUMPERS MIDDLE REPEATERS 10 MHz 1.25 MHz MPC SWITCHES/JUMPERS END REPEATER Figure 2-16 THREE OR MORE REPEATERS INSTALLATION 2-11 B- B+ TEMP...

  • Page 42: More Than One Rack Of Ltr-Net Repeaters

    INSTALLATION 10 MHz SPLITTER +12V TO GPS 10 MHz 1.25 MHz OUTPUTS SERIES 2000 OCXO DRAWER (023-2000-925) 10 MHz 1.25 MHz 0 dBm 10 MHz 1.25 MHz 10 MHz 1.25 MHz 10 MHz 1.25 MHz 10 MHz 1.25 MHz Figure 2-17 MORE THAN ONE RACK OF LTR-Net REPEATERS March 1999 Part No.

  • Page 43: Section 3 Software

    3.1 INTRODUCTION 3.1.1 PROGRAMMING SETUP The following items are required to program the repeater. The part numbers of this equipment are shown in Section 1, Table 1-1. A programming setup is shown above. The LTR-Net Programmer on 3.5 inch disk, Part No.

  • Page 44: Programming Cables

    SOFTWARE 3.1.3 PROGRAMMING CABLES The cables from the repeater to the computer are not included. TO MPC Figure 3-2 LAPTOP INTERCONNECT CABLE 3.1.4 EEPROM DATA STORAGE The data programmed into the MPC is stored by an EEPROM memory. Since this type of device is nonvolatile, data is stored indefinitely without the need for a constant power supply.

  • Page 45: Miscellaneous Software Information

    3.2 MISCELLANEOUS SOFTWARE INFORMA- TION 3.2.1 MINIMUM FREE MEMORY REQUIRED Approximately 2MB of free memory is required to run this program. If not enough is available, there may be other programs that are also being loaded into conventional memory. These programs can be closed to make more space available.

  • Page 46: Programming Flowchart

    SOFTWARE New* Ctrl+N Open* Ctrl+O Save As FILE Save* Ctrl+S [Files List] Exit Locality Information* Select Repeater* EDIT Repeater Information* Delete Repeater Read Setup Parameters* TRANSFER Write Setup Parameters* HSDB Monitor* Rx/Tx Data RF Data HARDWARE Input Monitor Revisions* Mode Select Exciter TEST Receiver...

  • Page 47: Section 4 Ltr-Net Programmer

    SECTION 4 LTR-Net PROGRAMMER 4.1 MENU DISPLAYS The menus available are listed at the top of the screen (see Figure 4-1). Move the cursor with the mouse to highlight the menu name. Press the left mouse key to view the menu and the mouse to scroll through the menu.

  • Page 48: Edit

    LTR-Net PROGRAMMER EDIT Figure 4-4 EDIT PROGRAMMING FLOWCHART 4.3 EDIT This menu is used to create new files and set or change the repeater operating parameters. The file- name for the Locality and relevant data is shown in the Title Bar and Status Bar (see Section 4.8.1). Figure 4-5 EDIT MENU Table 4-1 DEFINE REPEATERS PARAMETERS Delete Entry...

  • Page 49: Select Repeater

    Figure 4-7 ADJACENT LOCALITY DATA • Select the Locality ID number for the Locality cur- rently being defined. • Select a Locality ID for each of the closest Adjacent Localities (0-15). • Select a Preference number for each Adjacent Locality number as an alternative when leaving the range of this Locality.

  • Page 50: Repeater Information

    LTR-Net PROGRAMMER 4.3.3 REPEATER INFORMATION This menu selection has an equivalent icon in the toolbar. This menu selection or icon brings up the parameter pages for the selected repeater. It allows entry of information specific to this repeater. Figure 4-9 REPEATER CONFIGURATION Repeater Number 1-20 Channel Number...

  • Page 51: Output Alarms

    Figure 4-10 INPUT ALARMS Input Alarms There are four Input Alarms that can be activated by external devices (see Section 6.13). These inputs can be Disabled, Energized or De-Energized. Alarms 3 and 4 can also be Analog Inputs. • Disabled - The input alarm line is inactive. •...

  • Page 52: Alarm Cross Reference

    LTR-Net PROGRAMMER Cross Reference The cross reference screen selects the Output Alarm that is activated by each Input Alarm. There are up to: • 48 alarms (0-47) • 4 (hardware) External Input Alarms • 18 (software) Internal Alarms (see Table 1-2). •...

  • Page 53: Delete Repeater

    4.3.4 DELETE REPEATER Select the Repeater number to delete from this Locality and press the Delete button. Figure 4-14 DELETE REPEATER Figure 4-16 HARDWARE PROGRAMMING FLOWCHART 4.4 TRANSFER Figure 4-15 TRANSFER MENU 4.4.1 READ SETUP PARAMETERS This menu selection has an equivalent icon in the toolbar.

  • Page 54: Hardware

    LTR-Net PROGRAMMER 4.5 HARDWARE Figure 4-17 HARDWARE MENU Figure 4-18 HSDB MONITOR 4.5.1 HSDB MONITOR This menu selection has an equivalent icon in the toolbar. This menu selection or icon brings up the monitor window to view information from the High Speed Data Bus (HSDB). The HSDB connects all repeaters at a Locality and continually sends updates on the status of each repeater.

  • Page 55: Rf Data

    4.5.3 RF DATA Figure 4-20 RF DATA The RF Line Monitor window shows the state of the lines (see Figure 4-19). These lines are monitored by the A-D converter in the IAC. The normal values for each line are defined as follows. Synthesizer Lock Lines: Exciter Synthesizer Receive Synthesizer...

  • Page 56: Mode Select

    LTR-Net PROGRAMMER 4.5.6 MODE SELECT The Mode Select window places the repeater either in the Normal mode, Test mode or Diagnostic mode. In the Normal mode, the repeater operates as a normal repeater. In the Test mode or Diagnostic Mode the repeater transmits a test word.

  • Page 57: Exciter

    4.6.1 EXCITER This menu selection walks through the Exciter alignment windows. Refer to Section 7.3 for the Exciter alignment and Figure 7-2 for an alignment points diagram and Figure 7-10 for a test setup of the Exciter. 4.6.2 POWER AMPLIFIER This menu selection walks through the Power Amplifier and RF Interface Board alignment windows.

  • Page 58: View

    LTR-Net PROGRAMMER 4.8 VIEW 4.8.1 STATUS BAR The Status Bar is located at the bottom of the screen that displays information about the repeater. 4.8.2 TOOLBAR The toolbar may be detached (floating) from the main window by dragging the toolbar to a new loca- tion with the mouse.

  • Page 59: File Menu

    SECTION 4 LTR-Net PROGRAMMER 4.1 MENU DISPLAYS The menus available are listed at the top of the screen (see Figure 4-1). Move the cursor with the mouse to highlight the menu name. Press the left mouse key to view the menu and the mouse to scroll through the menu.
  • Page 60 LTR-Net PROGRAMMER EDIT Figure 4-4 EDIT PROGRAMMING FLOWCHART 4.3 EDIT This menu is used to create new files and set or change the repeater operating parameters. The file- name for the Locality and relevant data is shown in the Title Bar and Status Bar (see Section 4.8.1). Figure 4-5 EDIT MENU Table 4-1 DEFINE REPEATERS PARAMETERS Delete Entry...

  • Page 61: Select Repeater

    Figure 4-7 ADJACENT LOCALITY DATA • Select the Locality ID number for the Locality cur- rently being defined. • Select a Locality ID for each of the closest Adjacent Localities (0-15). • Select a Preference number for each Adjacent Locality number as an alternative when leaving the range of this Locality.
  • Page 62 LTR-Net PROGRAMMER 4.3.3 REPEATER INFORMATION This menu selection has an equivalent icon in the toolbar. This menu selection or icon brings up the parameter pages for the selected repeater. It allows entry of information specific to this repeater. Figure 4-9 REPEATER CONFIGURATION Repeater Number 1-20 Channel Number...
  • Page 63 Figure 4-10 INPUT ALARMS Input Alarms There are four Input Alarms that can be activated by external devices (see Section 6.13). These inputs can be Disabled, Energized or De-Energized. Alarms 3 and 4 can also be Analog Inputs. • Disabled - The input alarm line is inactive. •...
  • Page 64 LTR-Net PROGRAMMER Cross Reference The cross reference screen selects the Output Alarm that is activated by each Input Alarm. There are up to: • 48 alarms (0-47) • 4 (hardware) External Input Alarms • 18 (software) Internal Alarms (see Table 1-2). •...
  • Page 65 4.3.4 DELETE REPEATER Select the Repeater number to delete from this Locality and press the Delete button. Figure 4-14 DELETE REPEATER Figure 4-16 HARDWARE PROGRAMMING FLOWCHART 4.4 TRANSFER Figure 4-15 TRANSFER MENU 4.4.1 READ SETUP PARAMETERS This menu selection has an equivalent icon in the toolbar.
  • Page 66 LTR-Net PROGRAMMER 4.5 HARDWARE Figure 4-17 HARDWARE MENU Figure 4-18 HSDB MONITOR 4.5.1 HSDB MONITOR This menu selection has an equivalent icon in the toolbar. This menu selection or icon brings up the monitor window to view information from the High Speed Data Bus (HSDB). The HSDB connects all repeaters at a Locality and continually sends updates on the status of each repeater.
  • Page 67 4.5.3 RF DATA Figure 4-20 RF DATA The RF Line Monitor window shows the state of the lines (see Figure 4-19). These lines are monitored by the A-D converter in the IAC. The normal values for each line are defined as follows. Synthesizer Lock Lines: Exciter Synthesizer Receive Synthesizer...
  • Page 68 LTR-Net PROGRAMMER 4.5.6 MODE SELECT The Mode Select window places the repeater either in the Normal mode, Test mode or Diagnostic mode. In the Normal mode, the repeater operates as a normal repeater. In the Test mode or Diagnostic Mode the repeater transmits a test word.
  • Page 69 4.6.1 EXCITER This menu selection walks through the Exciter alignment windows. Refer to Section 7.3 for the Exciter alignment and Figure 7-2 for an alignment points diagram and Figure 7-10 for a test setup of the Exciter. 4.6.2 POWER AMPLIFIER This menu selection walks through the Power Amplifier and RF Interface Board alignment windows.
  • Page 70 LTR-Net PROGRAMMER 4.8 VIEW 4.8.1 STATUS BAR The Status Bar is located at the bottom of the screen that displays information about the repeater. 4.8.2 TOOLBAR The toolbar may be detached (floating) from the main window by dragging the toolbar to a new loca- tion with the mouse.

  • Page 71: Section 5 Repeater Programming

    SECTION 5 REPEATER PROGRAMMING 5.1 OVERVIEW The information in this section will assist the user in operating the programmer. 5.1.1 GETTING STARTED The LTR-Net Programmer is used to configure repeaters for proper operation with the LTR-Net proto- col. From the repeater standpoint, an LTR-Net system consists of one or more repeaters installed in a Local- ity, a 3000 Series Switch and the necessary intercon- nects and programming to provide LTR-Net operation.

  • Page 72: General Parameters

    REPEATER PROGRAMMING 5.2.1 GENERAL PARAMETERS These repeater parameters select the frequency band for the repeater and the channel number. There are 920 channel numbers with transmit/receive fre- quencies assigned (see Appendix A). The area bit is used to identify a specific system if more than one is operating in a geographical area.

  • Page 73: Section 6 Circuit Description

    SECTION 6 CIRCUIT DESCRIPTION 6.1 RECEIVER 6.1.1 INTRODUCTION The receiver provides high sensitivity and selec- tivity reception on any one of the 399 channels in the 896 to 901 MHz band. The receiver is a double conversion type with intermediate frequencies of 52.95 MHz and 450 kHz. The first injection frequency is stabilized by a temper- ature compensated crystal oscillator (TCXO) with a frequency stability of 0.1 PPM from -30 C to +60 C...

  • Page 74: Second Mixer/Detector

    CIRCUIT DESCRIPTION BANDPASS FILTER A201 RECEIVE L201/L202/L203 RF IN OCXO IN HIGH STABILITY SYNTHESIZER Q203 HS CS RX HS LK RX BUFFER U205 Q210 Q211 DATA 17.5 MHz TCXO MAIN BUFFER SYNTHESIZER Q210 Q211 DATA RF DATA RF CLK BUFFER U209 Q208 SYN CS RX...

  • Page 75: Wideband Audio Amplifier

    The 450 kHz second IF is then fed to ceramic fil- ter Z205, then to the IF amplifier. The center fre- quency of Z205 is 450 kHz with a -6 dB bandwidth of 9 kHz used to attenuate wideband noise. The limiter amplifies the 450 kHz signal 92 dB which removes any amplitude fluctuations.

  • Page 76: Synthesizer Block Diagram

    CIRCUIT DESCRIPTION OSC OR 4-STAGE DIVIDER SHIFT CLOCK REGISTER CONTROL DATA IN LOGIC ENABLE INPUT AMP Figure 6-3 SYNTHESIZER BLOCK DIAGRAM The programming of the counters in U205 is per- formed by circuitry in the Main Processor Card (MPC), buffered and latched through the Interface Alarm Card (IAC) and fed in to the synthesizer on J201, pin 20 to Data input port U205, pin 19.

  • Page 77: Lock Detect

    To determine the overall divide number of the prescaler and N counter, the number of TCXO output pulses required to produce one N counter output pulse can be counted. The prescaler divides by 65 for 65 x 22 or 1430 input pulses. It then divides by 64 for 64 x (27 - 22) or 320 input pulses.

  • Page 78: Synthesizer

    CIRCUIT DESCRIPTION 6.1.15 SYNTHESIZER The synthesizer inputs/outputs are shown in Fig- ures 6-1 and 6-3. The synthesizer output signal is the receiver first injection frequency. This signal is pro- duced by a VCO (voltage-controller oscillator). The frequency of this oscillator is controlled by a DC volt- age.

  • Page 79: Buffer Amplifier

    NOTE: Section 8.2.5 describes how the N and A counter numbers are calculated for other channels. To determine the overall divide number of the prescaler and N counter, the number of VCO output pulses required to produce one N counter output pulse can be counted.

  • Page 80: High Stability Synthesizer

    CIRCUIT DESCRIPTION C803 couples Q802 to resonator L404 in the Exciter. Resonator L404 provides the shunt inductance of the tank circuit. The shunt capacitance of the tank circuit is made primarily of C804 in series with CR802. RF choke L805 completes the DC bias path to ground. The VCO frequency is controlled in part by DC voltage across varactor diode CR802.
  • Page 81 This signal is integrated to provide a DC tuning voltage for the TCXO. The DC tuning voltage pro- vides the TCXO with the 0.1 PPM stability of the OCXO (see Section 6.3). The phase detector output signal is generated by counters in U401 programmed to divide by a certain number.

  • Page 82: Buffer

    CIRCUIT DESCRIPTION HIGH STABILITY SYNTHESIZER HS CS EX U401 HS LK EX LPTT EX MOD U402B U404A MAIN SYNTHESIZER DATA U403 SYN CS EX SYN LK EX Figure 6-4 EXCITER BLOCK DIAGRAM 6.2.7 BUFFER AMPLIFIER A cascode amplifier formed by Q401 and Q402 provides amplification and also isolation between the TCXO and Synthesizer U401.

  • Page 83: Buffer Amplifier

    The synthesizer contains the R (reference), N, and A counters, phase and lock detectors and counter programming circuitry. One input signal to the phase detector in U403 is the reference frequency (f ). This frequency is the 17.5 MHz TCXO frequency divided by the reference counter to the channel spacing or 12.5 kHz.

  • Page 84: Buffer Amplifier

    CIRCUIT DESCRIPTION RF bypass is provided by C416, C418 and C419. The output of Q403/Q404 is coupled to U403, pin 20 by C417. 6.2.10 BUFFER AMPLIFIER A cascode amplifier formed by Q406 and Q407 provides amplification and also isolation between the VCO and Synthesizer U403.

  • Page 85: Ocxo Drawer Block Diagram

    OCXO 1 BUFFER Y901 Q901 REMOTE SWITCH REMOTE SWITCH S904 CR902/CR903 S904 U908 OCXO SWITCH OCXO SWITCH S905 CR904/CR905 S905 U909 OCXO 2 BUFFER Y902 Q902 FRONT PANEL SWITCH CONTROLS OCXO 2 TEST S902 OCXO 1 TEST S901 DC ON/OFF S903 DC ALARM INDICATOR...

  • Page 86: Ocxo Drawer Front/Rear Panels

    CIRCUIT DESCRIPTION 1.25 MHz OUTPUTS OCXO1 OCXO2 OUTPUT DELTA F Figure 6-6 OCXO DRAWER FRONT/REAR PANELS When there is no output from the drawer, the RF Output LED changes from green to flashing red indi- cating failure. When there is a difference of more than 10 Hz between the two 10 MHz oscillators, the Delta F LED changes from green to flashing red (failure).

  • Page 87: Ocxo Switching

    10 MHz (OCXO 1, Q901) 10 MHz (OCXO 2, Q902) U901A 74HC00 U902D REMOTE CONTROL (S904, U908) OSCILLATOR SELECT (S905, U909) U902A 74HC08 OSC 1 (Q906, DS902) OSC 2 (Q909, DS903) NOTE: The bottom circuit does not allow (S) to be high and (OSC 1) to be low.

  • Page 88: Power Amplifier

    CIRCUIT DESCRIPTION to U913. The output of this phase comparator at U911, pin 13 is essentially low if the input from the VCO is higher in frequency than the input from U911, pin 12. Conversely, this output is essentially high if the input from the VCO is lower in frequency than the input from U911, pin 12.

  • Page 89: Power Detectors

    FINAL 1 POWER AMP / PRE-DRIVER DRIVER RF IN U501 POWER CONTROL THERMAL SENSOR THERMAL SENSOR U502A FINAL 2 POWER 6.4.4 POWER DETECTORS Electromagnetic coupling is used to sample the output of each final amplifier. The RF is then fed to a rectifier to create a voltage indicative of the power output.

  • Page 90: Final Amplifiers

    CIRCUIT DESCRIPTION POWER SENSE RF 1 1/2 WAVE DELAY LINE POWER SENSE RF 2 SPLITTER DRIVER GAIN BLOCK RF IN Q501 U501 Q502 POWER CONTROL RF 3 POWER SENSE THERMAL SENSOR THERMAL SENSOR U502A U503 POWER SENSE RF 4 6.5.3 FINAL AMPLIFIERS The output of the driver is DC blocked by C552 and is connected to the first 70.7 ohm splitter with a 50 ohm microstrip.

  • Page 91: Rf Interface Board

    6.6 RF INTERFACE BOARD The RF Interface Board connects the Receiver, Exciter and Power Amplifier to the backplane and power supply (see Figure 6-10). The input and output connectors for the RF Inter- face Board are defined as follows. 6.6.1 POWER CONNECTOR The power supply is connected to the RF Inter- face Board when the RF module is inserted into the station cabinet (see Figure 10-7).
  • Page 92 CIRCUIT DESCRIPTION Pin 13 RF MUX1 INH The Multiplexer-1 Inhibit (U105, pin 6) is a CMOS input from the Controller that inhibits (dis- ables) the output from the RF 1 Multiplexer with a logic high. Pin 14 V REF EX This is the 3.5V reference to the Exciter TCXO.

  • Page 93: Fan Connector (J104)

    Pin 30 RSSI This pin is the Receive Signal Strength Indication to the Controller. This RSSI is used for tune-up of the Receiver front-end during factory test mode. The dynamic range is 60 dB. It has an output from an op- amp with the voltage going from 0.5V to 4.5V.

  • Page 94: Exciter Connector (J102)

    CIRCUIT DESCRIPTION WO 122 RF OUT 1 This capacitive feedthrough pin is a voltage source that is a function of the output power of Q701. The voltage level will be between 0V-5V and drive a 10k ohm load. This line goes through the multiplexers and A D LEVEL line to the Controller for processing.

  • Page 95: Receiver Connector (J103)

    Pin 10 GROUND Pin 11 LPTT The Logic Push-To-Talk (LPTT) is an open col- lector from the Controller. It has a sink capability of 20 mA nominal and a voltage rating of 18V maxi- mum. The transmitter should produce power when this pin is a logic low.
  • Page 96 CIRCUIT DESCRIPTION Pin 10 UNUSED Pin 11 GROUND Pin 11 carries ground current between the RFIB and the Receiver board. Pin 12 SYN CS RX Pin 12 is the Receiver main synthesizer chip select. This chip is the same part as used in the Exciter.

  • Page 97: Rf Interface Board Block Diagram

    PC STR RF MUX3 INH WO103 VREF EX LPTT RF MUX1 INH A D LEVEL RF DATA C RF DATA B RF DATA A TX MOD STN CS EX HS CS EX RF MUX2 INH RSSI RX WB AUDIO RF DATA RF CLK SYN CS RX HS CS RX...

  • Page 98: Power Supply

    CIRCUIT DESCRIPTION 6.7 800W POWER SUPPLY WARNING This power supply contains voltage potentials greater than 400V. Considering the dangerous voltages and the complexity of the switch-mode power supply, it is strongly recommended the power supply be returned to E.F. Johnson for repair (see Section 1.8). 6.7.1 FILTER BOARD AC power is brought into the power supply through the IEC connector in the front of the power...

  • Page 99: Power Supply Block Diagram

    CIRCUIT DESCRIPTION Figure 6-11 POWER SUPPLY BLOCK DIAGRAM March 1999 Part No. 001-2009-600 6-27...

  • Page 100: Synchronizing Circuits

    CIRCUIT DESCRIPTION In operation, the power MOSFETs Q116, Q118 are on for approximately one-third of the period pro- viding current to the primary side of T107. During that time CR121 is forward conducting and charging L101. When the MOSFETs are switched off, the mag- netizing current of T107 continues to flow through CR118, CR119.

  • Page 101: Converter

    6.7.6 +15V CONVERTER The input voltage to this "Buck" DC/DC con- verter is the main +26.5V output fused through F102. The bias voltage for the controller IC U112, pin 15 is provided by a +15V regulator U111. The basic buck converter consists of MOSFET Q125, Schottky diode CR126 and storage inductor L102.

  • Page 102: Battery Back-Up Module

    CIRCUIT DESCRIPTION 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 adjustable. When certain components are replaced, the voltages must be adjusted. The voltages should be set at light load (i.e.

  • Page 103: Reverse Battery Protection

    Charger Voltage -55mV/°C 27.3V 25.2V +22° -30° 0° +30° Figure 6-12 NO LOAD CHARGE VOLTAGE vs. TEMPERATURE 6.8.3 REVERSE BATTERY PROTECTION To obtain reverse battery protection a number of techniques were implemented. Q108/Q110 are arranged in a Darlington configuration to isolate the output capacitors C109-C111 from conducting in the event the batteries are connected backwards.

  • Page 104: Bbm Fan Control

    CIRCUIT DESCRIPTION 6.8.6 BBM FAN CONTROL The voltage supply to the thermal measurement circuit is taken from the 26.5V DC line into the BBM. A precision temperature sensor U106 is mounted on the PC board near a screw into the BBM bracket which transfers heat to the sensor.

  • Page 105: Alarm External Connector Board

    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. Figure 6-14 ALARM EXTERNAL CONNECTOR BOARD ALARMS TO CARD RACK EXTERNAL CONNECTOR BOARD 6-33 CIRCUIT DESCRIPTION...

  • Page 106: Main Processor Card

    CIRCUIT DESCRIPTION 6.11 MAIN PROCESSOR CARD 6.11.1 INTRODUCTION The Main Processor Card (MPC) connects to the computer with repeater software to program the repeater parameters, sets and reads the alarms, han- dles communication between repeaters, maintains the audio gating for the MAC, handles initialization requests from cards and contains the repeater RF data for the Receiver, Exciter and CWID.

  • Page 107: High Speed Data Bus Microprocessor

    P2-0 P2-1 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 P1-0 P1-1 PROGRAMMABLE P1-2 INTERRUPT P1-3 CONTROLLER P1-4 CLOCK 16-BIT TIMER TIME BASE CONTROLLER P1-5 REFRQ 6.11.3 HIGH SPEED DATA BUS MICROPRO- CESSOR The HSDB processor (U13) on the MPC pro- vides the interface with the HSDB.

  • Page 108: Chip Select Decoders

    CIRCUIT DESCRIPTION The operating speed of the microprocessor is set by an 11.059 MHz clock generated by Y2. This clock frequency is divided down by an internal divider to provide a machine cycle time of 1.08 s. Most pro- gram instructions are executed in one machine cycle and none require more than four machine cycles.

  • Page 109: J1 Computer Connector

    Pins 25-26 UNUSED Pins 27/59 -5V IN This is the -5V input to the MPC from the power supply via the Controller backplane. Pins 28-29 +5V IN Pins 60-61 This is the +5V input to the MPC from the power supply via the Controller backplane.

  • Page 110: Main Audio Card

    CIRCUIT DESCRIPTION 6.12 MAIN AUDIO CARD 6.12.1 INTRODUCTION This control card stores the information required to operate the routing of audio and data from the inputs of the repeater to the outputs. Data is received on the address bus from the MPC for the operations to perform.

  • Page 111: Receive Squelch Circuitry

    data, and noise. The audio processing circuit provides filtering and amplification of the audio signal before it is routed to the outputs on the MAC card. A low-pass filter consisting of U121A/B attenu- ates frequencies above 3 kHz. This removes high-fre- quency noise from the audio signal.

  • Page 112: Receive Audio Processing

    CIRCUIT DESCRIPTION 6.12.6 RECEIVE AUDIO PROCESSING The receive audio signal from the receiver is fed into the MAC on P100, pin 27. When it is a call that does not need to be routed to the Switch (i.e. most mobile-to-mobile calls utilizing only that repeater), Repeat Gate U153C is enabled and the receive audio signal is routed through Transmit Option Gate U158C to the input of the transmit audio buffer U164B to be...

  • Page 113: Transmit Audio Processing

    Limiter U127D and rectifiers form a precision limiter which prevents over modulation caused by high-level input signals. With normal input levels, the output of a bridge rectifier follows the input of the bridge. When a high-level signal is applied to the bridge, the bridge opens and the output of the bridge is limited to a specific level.

  • Page 114: Fsk Modem

    CIRCUIT DESCRIPTION stable DC bias voltage for U126C/D is required because these stages are DC coupled to the transmit TCXO (see Section 6.2.2) and changes in bias voltage can cause fluctuations in the transmit frequency. U126C/D form a low-pass filter that attenuates square-wave harmonics in the data signal above 150 Hz to prevent interference with the audio band.

  • Page 115: Fsk Modem Switch Settings

    This modem operates half-duplex, therefore two are used to provide full duplex operation which is the simultaneous transmission and reception of data. The data rate is 1200 baud (bits per second). Full duplex 1200 baud operation is possible because a 4-wire line is used which provides two separate audio paths.

  • Page 116: P101 Signaling Connector

    Pins 24/56 HSDB+/- The High Speed Data Bus interconnects the Viking VX repeaters. A 50 ohm termination is required if Viking VX repeaters are used with existing repeaters and the interface. Pins 25/57 UNUSED Pin 26...

  • Page 117: P100 External Outputs

    Pins 49-55 UNUSED Pin 58 VOTER DATA IN This is used in a Voter system. Data from the voted site is injected at this pin. 6.12.14 P100 EXTERNAL OUTPUTS Connector P100 contains the audio and data out- puts to the terminal block on the back of the Repeater cabinet.

  • Page 118: J104 External Speaker

    CIRCUIT DESCRIPTION 6.12.19 J104 EXTERNAL SPEAKER J104 provides an external speaker connection at the repeater site for monitoring. 6.12.20 J105 WATCH DOG J105 enables or disables the watchdog timer for reset. Normal operating mode is P105 jumpering J105, pins 2/3. This jumper should not be moved or removed.

  • Page 119: Isolated Inputs

    Figure 6-20 4 I/O J2 ALARM OUTPUTS 6.13.3 ISOLATED INPUTS The isolated alarm inputs are provided via a ter- minal block on the back of the repeater (see Figures 6- 19 and 6-20). The isolated inputs are driven by either AC or DC signals.

  • Page 120: P500 Signaling Connector

    CIRCUIT DESCRIPTION 6.13.6 P500 SIGNALING CONNECTOR The input and output connectors for the IAC are defined as follows. The signal interface connector P500 (64 pin) connects the Address and Data buses and control lines to the backplane connector. See Fig- ure 6-26.

  • Page 121: P501 External Outputs

    Pins 21-23 UNUSED Pins 24/25 +15V ACCESSORY This DC supply is an output to an external device through rear connector J1. Pins 26/58 +15V FILTERED This DC supply is an output to an external device through rear connector J1. Pins 27/59 -5V IN This is the -5V input from the power supply via the Controller backplane.
  • Page 122 CIRCUIT DESCRIPTION Pin 9 AC FAIL IN This input from the AC supply is used by the AC fail output to indicate that the AC has been interrupted. Pin 10 SYN CS RX This is the chip select pin for the main receiver synthesizer chip.

  • Page 123: J500 A D Level Test Point

    Pin 31 RF DATA C Data C (U105, pin 9) is the most significant bit (MSB) in the 3 multiplex chips located on the RFIB. This pin is a CMOS input from the Controller requir- ing a logic high for activation. Pin 32 RF DATA This is a data pin with TTL levels from the Con-...
  • Page 124 CIRCUIT DESCRIPTION March 1999 Part No. 001-2009-600 6-52...

  • Page 125: Main Processor Card Block Diagram

    CIRCUIT DESCRIPTION Figure 6-23 MAIN PROCESSOR CARD BLOCK DIAGRAM March 1999 Part No. 001-2009-600 6-53...

  • Page 126: Main Audio Card Logic Block Diagram

    CIRCUIT DESCRIPTION Figure 6-24 MAIN AUDIO CARD LOGIC BLOCK DIAGRAM March 1999 Part No. 001-2009-600 6-54...

  • Page 127: Main Audio Card Audio Block Diagram

    CIRCUIT DESCRIPTION Figure 6-25 MAIN AUDIO CARD AUDIO BLOCK DIAGRAM March 1999 Part No. 001-2009-600 6-55...

  • Page 128: Interface Alarm Card Block Diagram

    CIRCUIT DESCRIPTION Figure 6-26 INTERFACE ALARM CARD BLOCK DIAGRAM March 1999 Part No. 001-2009-600 6-56...

  • Page 129: Section 7 Alignment And Test Procedures

    SECTION 7 ALIGNMENT AND TEST PROCEDURES 7.1 OCXO AND TEST EQUIPMENT FREQUEN- CY STABILITY The receiver and transmitter frequencies are locked to the 1.250000 MHz reference frequency from the local oscillator drawer. This frequency is stable to within 0.1 PPM from -30 C to +60 C as required by the FCC.

  • Page 130: Front End Adjustments

    ALIGNMENT AND TEST PROCEDURES 5. The Synthesizer is programmed for 199 channels below the Receive Channel. 6. The voltage on U209, pin 6 (TP2) should be > 2V DC. 7. Record the voltage on J201, pin 13 (TP5) ____. 8. If the voltages recorded in Steps 3 and 6 are not within 0.2V, tune L224 as required to balance the voltage readings.

  • Page 131: Exciter Alignment

    J201 U206 R261 R264 R284 Y201 Z213 L224 L231 L225 L211 L207 L209 L229 Figure 7-1 RECEIVER ALIGNMENT POINTS 7.3 EXCITER ALIGNMENT Refer to Figure 7-2 for component locations. Refer to Figure 7-10 for equipment needed and setup diagram. WARNING SAFETY MEASURES ARE DISABLED IN TEST MODE.

  • Page 132: Tcxo Frequency Adjust

    ALIGNMENT AND TEST PROCEDURES 7.3.4 TCXO FREQUENCY ADJUST 1. Tune TCXO Y401 for 3.5V DC 0.05V DC at U402, pin 1 (response time is very slow). 7.3.5 VCO TEST 1. The Synthesizer is programmed for 199 channels above the transmit frequency. 2.

  • Page 133: Power Amplifier Alignment

    11. Use the "Turn on carrier" button to unkey the Exciter. 12.Repeat Steps 1-7. Very little adjustment of R446 should be needed. 7.4 75W POWER AMPLIFIER ALIGNMENT 7.4.1 INTRODUCTION Refer to Figures 7-3 and 7-5 for component loca- tions. Refer to Figure 7-11 for equipment needed and setup diagram.

  • Page 134: Reflected Power Adjust

    ALIGNMENT AND TEST PROCEDURES NOTE: If the Transmit current begins to increase rap- idly and is not constant with time, then unkey the PA immediately and troubleshoot. 3. Adjust power limit control R76 clockwise until power is limited to 0.55 dB above 85W (95W). If the maximum PA power is <...

  • Page 135: Power Amplifier Alignment

    7.5 160W POWER AMPLIFIER ALIGNMENT Refer to Figures 7-4 and 7-5 for component loca- tions. Refer to Figure 7-8 for equipment needed and setup diagram. NOTE: No alignment is required unless the driver transistor Q502 or driver matching caps have been replaced or critical components on the power detec- tor board have been replaced.

  • Page 136: Rf Interface Board Alignment Points

    ALIGNMENT AND TEST PROCEDURES Figure 7-4 160W POWER AMPLIFIER ALIGNMENT POINTS J104 WO143 J101 WO144 WO126 WO145 WO121 Figure 7-5 RF INTERFACE BOARD ALIGNMENT POINTS March 1999 Part No. 001-2009-600 R663 R680 R717 WO510 R730 R703 R170 J103 U108 R171 R150 R106 U104...

  • Page 137: Repeater To Cim Test Setup

    GREEN WHITE WHITE BLACK BLACK (INCLUDED IN 2000 SERIES SERVICE KIT 250-2000-230) Figure 7-6 POWER EXTENDER CABLES SWITCH (RNT) RXA+ RXA- TXS+ TXS- VOLTMETER Figure 7-7 REPEATER TO CIM TEST SETUP ALIGNMENT AND TEST PROCEDURES GREEN WHITE BLACK VOLTMETER REPEATER LINK LINES RXA+ RXA-...

  • Page 138: W Pa Test Setup

    ALIGNMENT AND TEST PROCEDURES POWER METER 50 OHM DUMMY LOAD 40 dB THRULINE ATTENUATOR March 1999 Part No. 001-2009-600 J103 PROG JACK A D LEVEL J100 RESET LOCAL POWER ON/OFF/VOL CWID R236 HANG SWITCH MOBILE J102 XMIT SPKR J101 TEST POINT EXT SPKR J104 J500...

  • Page 139: Receiver Test Setup

    VOLTMETER OSCILLOSCOPE AUDIO DISTORTION ANALYZER HP 334A FREQUENCY COUNTER J401 J201 J402 Figure 7-9 RECEIVER TEST SETUP ALIGNMENT AND TEST PROCEDURES VOLTMETER OCXO1 OCXO2 DELTA F OUTPUT DC BACKUP INTERRUPT OCXO 1 INTERRUPT OCXO 2 INTERRUPT 16 OHM POWER CABLES 36-PIN RIBBON CABLE RFIB 7-11...

  • Page 140: Exciter Test Setup

    ALIGNMENT AND TEST PROCEDURES VOLTMETER VOLTMETER 1.25 MHz OSCILLOSCOPE MODULATION ANALYZER POWER CABLES HP 8901A POWER METER 10 dB 50 OHM 36-PIN RIBBON CABLE DUMMY LOAD HP 436A FREQUENCY COUNTER 10 dB RFIB J401 J201 J402 Figure 7-10 EXCITER TEST SETUP March 1999 Part No.

  • Page 141: W Power Amplifier Test Setup

    POWER METER 50 OHM DUMMY LOAD HP 436A 40 dB THRULINE ATTENUATOR Figure 7-11 75W POWER AMPLIFIER TEST SETUP 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...

  • Page 142: Full Repeater Alignment

    1. Select the TEST - FULL REPEATER - ALL TEST and press Enter. 7.6.2 REPEATER SETUP The Viking VX repeater has been pretested at the factory, therefore only performance tests are required to check the repeater. Refer to test setup diagrams for equipment and cabling diagram.
  • Page 143 3. Adjust R237 for 0 dBm (775 mV RMS). 4. Connect a 16 ohm load and distortion analyzer to J101 or J104 of the MAC. 5. Adjust R236 for 2.8V RMS and measure the distor- tion. Distortion should be < 3%. Receiver Hum and Noise Measurement NOTE: Receiver cover must be on for this measure- ment.

  • Page 144: Receiver Expander Measurement

    ALIGNMENT AND TEST PROCEDURES 2. Adjacent Channel Rejection 3. Offset Channel Selectivity 4. Intermodulation Rejection 5. Spurious Rejection 6. Audio Response 7. Audio Sensitivity Perform the Test desired using the appropriate RF Generators, modulation frequencies and levels, R236 levels and test probes. 7.6.5 RECEIVER EXPANDER MEASUREMENT NOTE: This test is valid only with compandor option installed.
  • Page 145 Data Level Adjustment 1. Remove VNC cards if present. (Set modulation analyzer LPF switch to 3 kHz.) Final adjustment must be performed on the customer channel. 2. Use the "Turn on carrier" button to key the transmit- ter. 3. Adjust U151 with the Level Control buttons to achieve 750 Hz 50 Hz transmit deviation.

  • Page 146: Transmitter Compressor Measurement

    ALIGNMENT AND TEST PROCEDURES 7.6.7 TRANSMITTER COMPRESSOR MEA- SUREMENT NOTE: This test is valid only with compandor option installed. 1. Set the modulation analyzer LPF to 3 kHz. 2. Apply +7 dBm (1.73V RMS) at 1 kHz to P100, pin 32 on the MAC.

  • Page 147: S100/S101 Switch Settings

    2. Inject a 1.2 kHz tone from a balanced 600 ohm source, at the level determined by the type of line used, into TXS+ and TXS- of J2 located on the back of the Repeater (see Figure 7-14). Leased Line/Direct Connect (default) -12 dBm (194 mV RMS) Microwave/T1 (optional) -28 dBm (31 mV RMS)

  • Page 148: Repeater Operation

    ALIGNMENT AND TEST PROCEDURES FSK Data Level Adjustment From Repeater Separate Data Path (4-Wire) Optional Setting. 1. Set MAC S100 Sections 1, 4, 5, 8 OFF; 2, 3, 6, 7 ON; S101 Sections 2, 3, 4 OFF; 1 ON (see Figure 7-15). 2.

  • Page 149: Switch (Rnt) Interface

    2. Verify that the repeater is programmed for "Stand Alone" mode in Setup Parameters-F4 (see Section 4.3.3). 3. The repeater is now in Normal Operation mode. Verify by the MPC front panel indicators that no HSDB alarms have occurred (Alarm Number 10) see Table 1-2.

  • Page 150: Voice Audio To Switch

    J2-15 P1-59 TxS+ J2-16 P1-60 TxS- Figure 7-21 VIKING VX VOICE/DATA LINK March 1999 Part No. 001-2009-600 Figure 7-22 S100/S101 SWITCH SETTING 7.7.3 VOICE AUDIO TO SWITCH 1. On the MAC, set S100 and S101, all Sections OFF (see Figure 7-22).

  • Page 151: Mac Switch Settings

    3. On the CIM, connect a balanced AC voltmeter at J12. 4. On the CIM, adjust R44 for the type of line used. Leased Line/Direct Connect (default) -12 dBm (194 mV RMS) Microwave/T1 (optional) -28 dBm (31 mV RMS) 5. On the MAC, adjust R243 for -6 dBm (387 mV RMS) measured at J100/J103.

  • Page 152: Fsk Link - Fsk Data Level To Switch

    ALIGNMENT AND TEST PROCEDURES 7.7.6 FSK LINK - FSK DATA LEVEL TO SWITCH 1. On the MAC, set S100 all Sections OFF set S101, sections 2, 3, 4 OFF set S101, section 1 ON (see Figure 7-23). 2. Connect a balanced AC voltmeter with 600 ohm input impedance between balanced lines RXA+ and RXA- of J2 located on the back of the Repeater (see Figure 7-20).

  • Page 153: Battery Charger Test Setup

    ALIGNMENT AND TEST PROCEDURES BASIC BOARD MODULE 023-2000-830 LM335 FAN CONTROL TEMP ENABLE POWER SUPPLY ACTIVE LOAD CHGR 0-40V @ 3A Figure 7-25 BATTERY CHARGER TEST SETUP March 1999 Part No. 001-2009-600 7-25...

  • Page 154: Switch (Rnt) Backplane Wireharness

    ALIGNMENT AND TEST PROCEDURES Figure 7-26 SWITCH (RNT) BACKPLANE WIREHARNESS March 1999 Part No. 001-2009-600 7-26...

  • Page 155: Switch (Rnt) Punch Block

    NOT USED PIN NUMBERS WHT/BLU RXS- BLU/WHT RXS+ WHT/ORN TXS- ORN/WHT TXS+ WHT/GRN GRN/WHT UNIT 1 WHT/BRN BRN/WHT WHT/SLT RXA- SLT/WHT RXA+ RED/BLU TXA- BLU/RED TXA+ RED/ORN RXS- ORN/RED RXS+ RED/GRN TXS- GRN/RED TXS+ RED/BRN BRN/RED UNIT 2 RED/SLT SLT/RED BLK/BLU RXA- BLU/BLK...

  • Page 156: Mac Alignment Points

    ALIGNMENT AND TEST PROCEDURES RESET S102 J103 A D LEVEL J100 TEST POINT DATA LEVEL U151 LOCAL SPKR R236 ON/OFF/VOL J102 LOCAL MIC J101 SPEAKER/MIC J104 SPEAKER Figure 7-28 MAC ALIGNMENT POINTS March 1999 Part No. 001-2009-600 SEC AUDIO U149 TO RNT RX NET LEVEL...

  • Page 157: Main Processor Card Alignment Points

    RESET 1 2 3 HSDB 11.059 12 1 10 USED WITH CR3/4 FOR ALARMS - MPC OPERATIONAL (BLINKING) - ON = HIGH POWER, OFF = LOW POWER - ON = LTR, OFF = MULTI-NET USED WITH DS1 FOR ALARMS PROGRAMMING CONNECTOR Figure 7-29 MAIN PROCESSOR CARD ALIGNMENT POINTS ALIGNMENT AND TEST PROCEDURES...

  • Page 158: Interface Alarm Card Alignment Points

    ALIGNMENT AND TEST PROCEDURES ALARM 3 S502 CR525 +15V (GRN) CR523 +15V ACC (GRN) CR524 -5V (GRN) CR501 +5V (GRN) CR503 CWID (GRN) CR502 HANG (YEL) SWITCH (YEL) CR505 MOBILE (GRN) CR504 CR500 XMIT(RED) J505 SQUELCH ENABLE OUTPUT J500 AD LEVEL TP - INVERTED - NON-INVERTING J501...

  • Page 159: Section 8 Servicing

    8.1 INTRODUCTION 8.1.1 PERIODIC CHECKS This repeater should be put on a regular mainte- nance schedule and an accurate performance record maintained. Important checks are receiver sensitivity and transmitter frequency, modulation, and power out- put. It is recommended that repeater performance be checked regularly even though periodic checks are not specifically required by the FCC.

  • Page 160: Tcxo Module

    SERVICING 8.2.2 TCXO MODULE Check the signal at TCXO, pin 5. It should be 17.5 MHz for Y201 and Y401 at a level of approxi- mately 3V P-P. If the TCXO is defective, it is not ser- viceable and must be replaced with a new unit as described in Section 8.1.5.

  • Page 161: Calculating "N " And "A " Counter Divide Numbers

    Measure the prescaler input frequency at f 11. Then measure the output frequency at TEST 2, pin 13 and calculate the divide number. If the VCO is not locked on frequency, the divide number should still be correct. The measured frequencies may not be exactly as calculated due to counter accuracy and res- olution limitations.

  • Page 162: Power Supply Rear View

    SERVICING nent layout are provided for those customers that desire to do their own repairs (see Sections 9 and 10). +15V +15V Figure 8-3 POWER SUPPLY REAR VIEW EARTH GROUND LINE Figure 8-4 POWER SUPPLY FRONT VIEW March 1999 Part No. 001-2009-600 AC FAIL +28V THERMAL...

  • Page 163: Voltage Checks

    Standby Battery Jack This provides a connection point for a +24V DC standby battery. Current is drawn from the battery only when the repeater enable line is on and AC has failed, or no AC is connected. A trickle charger can be jumpered in to charge the battery when AC returns.

  • Page 164: Chip Transistors And Diodes

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

  • Page 165: Beryllium Product Warning

    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 166 SERVICING March 1999 Part No. 001-2009-600...

  • Page 167: Section 9 Parts List

    SYMBOL NUMBER DESCRIPTION 900 MHz LTR-Net 75W REPEATER PART NO. 242-2009-632 A 003 900 MHz 75W repeater assem 023-2009-932 A 006 Tx/Rx module assembly A 010 2000 series power supply HW001 6-32 machine panhead philips 575-1606-012 MP001 PA hold down bracket...

  • Page 168: 900 Mhz 160W Repeater Assembly

    PARTS LIST SYMBOL NUMBER DESCRIPTION Q 501* 30W 900 MHz 24V MRF894 576-0004-821 Q 502* 60W 800 MHz 24V MRF898 576-0004-820 Q 503* 60W 800 MHz 24V MRF898 576-0004-820 R 508* 100 ohm 20W flange mount R 509* 100 ohm 100W flange mount 569-5001-002 R 685* 50 ohm 250W flange mount U 501 6W 870-950 MHz power mod 544-4001-051 900 MHz 160W REPEATER ASSEMBLY...

  • Page 169: Transceiver Mechanical

    SYMBOL NUMBER DESCRIPTION EP001 Ferrite bead EP002 Ferrite bead EP010 3/8" heat shrink tubing EP011 1/2" tubing HW013 6-32 machine panhead philips 575-1606-014 HW014 6-32 panhead philips ZPS HW016 8-32 panhead philips ZPS HW017 10-32 machine panhead phil HW018 6-19 panhead philips ZPS HW019 6-32 machine flathead philips 575-8206-012 HW020 6-32 x 0.094 nut HW021 8-32 socket head shield screw 575-9078-106...

  • Page 170: External Connector Board

    PARTS LIST SYMBOL NUMBER DESCRIPTION P 013 32-pin DIN female straight P 014 64-pin DIN female straight P 015 32-pin DIN female straight P 016 64-pin DIN female straight P 017 32-pin DIN female straight P 018 64-pin DIN female straight PC001 PC board EXTERNAL CONNECTOR BOARD PART NO.
  • Page 171 SYMBOL NUMBER DESCRIPTION HW105 Polarizing key box cnt HW106 Polarizing key box cnt HW240 #6 plit lock washer ZPS HW247 6-32 machine pan head philips 575-1606-012 J 101 36-pin right angle radial J 102 20-pin straight low profile J 103 20-pin straight low profile J 104 4-pin right angle header...
  • Page 172 PARTS LIST SYMBOL NUMBER DESCRIPTION R 123 20k ohm 1% 1206 SMD R 124 10k ohm 1% 1206 SMD R 125 20k ohm 1% 1206 SMD R 126 10k ohm 1% 1206 SMD R 127 20k ohm 1% 1206 SMD R 128 10k ohm 1% 1206 SMD R 129...

  • Page 173: Mhz Receiver

    SYMBOL NUMBER DESCRIPTION RECEIVE VCO PART NO. 023-2009-800 C 803 1 pF 0.1 pF 150V chip C 804 2.7 pF 0.1 pF 150V chip C 805 .47 F 16V tantalum SMD C 806 4.7 F 10V tantalum SMD C 807 27 pF 5% NPO 0805 chip C 808 27 pF 5% NPO 0805 chip...
  • Page 174 PARTS LIST SYMBOL NUMBER DESCRIPTION C 256 .1 F 10% X7R 1210 C 257 .1 F 10% X7R 1210 C 258 27 pF 5% NPO 1206 chip C 259 27 pF 5% NPO 1206 chip C 260 27 pF 5% NPO 1206 chip C 261 3.3 pF 5% NPO 1206 chip C 262...
  • Page 175 SYMBOL NUMBER DESCRIPTION CH202 2-cavity helical front end CH203 1-cavity helical front end CR201 Hot carrier diode SOT-23 CR204 Si 9.1V zener SOT-23 CR205 5.6V zener SOT-23 CR206 5.6V zener SOT-23 EP200 Mini ceramic crystal pin insul 010-0345-280 EP202 Ferrite bead SMD 1206 EP204 Ferrite bead SMD 1206 EP206 Ferrite bead SMD 1206 HW200 10-32 hex set screw NPB...
  • Page 176 PARTS LIST SYMBOL NUMBER DESCRIPTION R 220 100 ohm 5% 1206 SMD R 221 180 ohm 5% 1206 SMD R 222 3.3k ohm 5% 1206 SMD R 223 2.7k ohm 5% 1206 SMD R 224 100 ohm 5% 1206 SMD R 225 100 ohm 5% 1206 SMD R 226...

  • Page 177: Transmit Vco

    SYMBOL NUMBER DESCRIPTION TP001 Red tip jack, vert. 0.08 TP003 Red tip jack, vert. 0.08 TP004 Red tip jack, vert. 0.08 TP005 Red tip jack, vert. 0.08 TP006 Red tip jack, vert. 0.08 U 201 Mixer LRMS-2H U 202 FM IF MC3371D SO-16 U 203 Dual op amp SO-8 U 204 Op amp SO-8 MC33172D U 206 +12V regulator 78L12 SO-8...
  • Page 178 PARTS LIST SYMBOL NUMBER DESCRIPTION C 429 27 pF 5% NPO 1206 chip C 430 27 pF 5% NPO 1206 chip C 431 27 pF 5% NPO 1206 chip C 432 27 pF 5% NPO 1206 chip C 433 2 pF 5% NPO 1206 chip C 434 27 pF 5% NPO 1206 chip C 441...

  • Page 179: Power Amplifier

    SYMBOL NUMBER DESCRIPTION R 410 100 ohm 5% SMD 1206 R 411 1k ohm 5% SMD 1206 R 412 8.2k ohm 5% SMD 1206 R 416 270 ohm 5% SMD 1206 R 417 10k ohm 5% SMD 1206 R 418 10 ohm 5% SMD 1206 R 419 12.1k ohm 1% SMD 1206...
  • Page 180 PARTS LIST SYMBOL NUMBER DESCRIPTION C 510 1 F 35V tantalum SMD C 511 56 pF high Q .110 cube C 512 .1 F 35V tantalum SMD C 513 1 F 35V tantalum SMD C 514 .018 F 10% X7R 0805 chip 510-3605-183 C 515 56 pF high Q .110 cube C 516...
  • Page 181 SYMBOL NUMBER DESCRIPTION Q 501* 30W 24V 900 MHz MRF-894 576-0004-821 Q 502* 60W 24V 800 MHz MRF-898 576-0004-820 Q 503* 60W 24V 800 MHz MRF-898 576-0004-820 R 501 820 ohm 5% 1206 SMD R 502 12 ohm 5% 1206 SMD R 503 820 ohm 5% 1206 SMD R 504...
  • Page 182 PARTS LIST SYMBOL NUMBER DESCRIPTION C 555 4.7 F 16V tantalum SMD C 556 4.7 F 16V tantalum SMD C 557 .018 F 10% X7R chip C 558 .001 F 5% NPO 1206 chip 510-3602-102 C 559 .018 F 10% X7R chip C 560 1 F 16V tantalum SMD C 561...

  • Page 183: Forward/Reverse Power Detector

    SYMBOL NUMBER DESCRIPTION EP701 Ferrite bead SMD 1233 EP702 Ferrite bead SMD 1233 EP703 Ferrite bead SMD 1233 EP704 Ferrite bead SMD 1233 EP705 Ferrite bead SMD 1233 EP706 Ferrite bead SMD 1233 EP707 Ferrite bead SMD 1233 EP708 Ferrite bead SMD 1233 EP709 Ferrite bead SMD 1233 EP710 Ferrite bead SMD 1233 EP711 Ferrite bead SMD 1233...

  • Page 184: 900 Mhz 75W Pa Mechanical

    PARTS LIST SYMBOL NUMBER DESCRIPTION C 662 4.7 F 10V tantalum SMD C 663 .001 F 5% NPO 1206 chip 510-3602-102 C 664 27 pF 5% NPO 0805 chip C 665 27 pF 5% NPO 0805 chip C 667 27 pF 5% NPO 0805 chip C 668 27 pF 5% NPO 0805 chip C 669...

  • Page 185: 900 Mhz 160W Pa Mechanical

    SYMBOL NUMBER DESCRIPTION MP254 M PA plate align dowel pin MP255 PA heat sink MP256 PA shield, left MP257 PA shield, top MP258 Low power PA shield, 1 fan MP261 1/4 hex brass M/F spacer MP262 High power LPF PA shield MP268 M PA stop MP270 PA shield 900 MHz 75W PA MECHANICAL...

  • Page 186: Power Supply Main Board

    PARTS LIST SYMBOL NUMBER DESCRIPTION 800W POWER SUPPLY MAIN BOARD PART NO. 023-2000-810 A 002 Pin feed EPROM blank label A 802 Wireharness A 803 Thermal sensor board assem C 101 220 µF 25V aluminum radial 510-4225-221 C 102 .01 µF ±5% X7R 1206 C 103 220 nF ±10% X7R 1210 C 104...
  • Page 187 SYMBOL NUMBER DESCRIPTION C 198 1 µF 35V tantalum SMD C 199 6.8 µF 35V tantalum SMD C 200 6.8 µF 35V tantalum SMD C 201 .01 µF ±5% X7R 1206 C 202 470 pF ±5% NPO 1206 C 203 470 pF ±5% NPO 1206 C 204 .047 µF ±5% X7R 1206...
  • Page 188 PARTS LIST SYMBOL NUMBER DESCRIPTION F 102 10A 250V fastblow AGC fuse 534-0003-036 FH102 Fuse clip HW100 Cam5 x 3.795 sil-pad HW101 0.89 x 1.37 sil-pad HW102 1.06 x 4.73 sil-pad HW104 0.83 x 5 Teflon spacer HW105 0.83” Teflon spacer HW106 1.28”...
  • Page 189 SYMBOL NUMBER DESCRIPTION R 126 10 ohm ±5% 1206 SMD R 127 1.27k ohm ±1% 1206 SMD R 128 51 ohm ±5% 2512 SMD R 129 36k ohm ±5% 1206 SMD R 130 100k ohm ±5% 1206 SMD R 131 36k ohm ±5% 1206 SMD R 132 10k ohm ±5% 1206 SMD...
  • Page 190 PARTS LIST SYMBOL NUMBER DESCRIPTION R 223 13k ohm ±5% 1206 SMD R 224 Zero ohm ±5% 1206 SMD R 225 68 ohm ±5% 1206 SMD R 226 24 ohm ±5% 1206 SMD R 227 180 ohm ±5% 1206 SMD R 228 2k ohm ±1% 1206 SMD R 229...

  • Page 191: Ac Filter Board

    SYMBOL NUMBER DESCRIPTION U 112 PWM current mode ML4823 544-2002-034 U 113 PWM current mode ML4823 544-2002-034 U 114 5V 3A regulator power supply 544-2003-098 U 115 Programmable TL431AID U 116 Programmable TL431AID U 117 Programmable TL431AID U 118 Programmable TL431AID U 119 Opto-isolator SOIC-8 U 120 Opto-isolator SOIC-8...
  • Page 192 PARTS LIST SYMBOL NUMBER DESCRIPTION CR115 Switching diode SOT-23 CR116 3A ultra-fast diode CR117 13V 1W zener SMT CR118 18V ±5% zener SMT EP100 Heat sink insulator TO-220 EP101 Copper terminal lug EP102 Copper terminal lug EP103 Copper terminal lug F 101 4A resettable polyfuse HW100 4-40 machine panhead ZPS...

  • Page 193: Thermal Sensor Board

    SYMBOL NUMBER DESCRIPTION R 159 180k ohm ±5% 1206 SMD R 160 10k ohm ±5% 1206 SMD R 165 2k ohm ±5% 2512 SMD S 101 Toggle switch on/on rt angle U 101 Quad comparator 2901 U 102 Programmable voltage reg U 103 Programmable voltage reg U 104 Dual op amp SO-8 U 105 Dual op amp SO-8...
  • Page 194 PARTS LIST SYMBOL NUMBER DESCRIPTION CR904 Dual switch diode SOT-23 CR905 Dual switch diode SOT-23 CR906 Switching diode SOT-23 CR907 200V 1.5A rectifier 1N4818 CR908 200V 1A rectifier 1N4003 DS901 Red/Green LED right angle DS902 Red/Green LED right angle DS903 Red/Green LED right angle DS904 Red/Green LED right angle DS905 Red/Green LED right angle DS906 Red/Green LED right angle...
  • Page 195 SYMBOL NUMBER DESCRIPTION Q 905 Si NPN SOT-23 Q 906 Si NPN SOT-23 Q 907 Si NPN SOT-23 Q 908 Si NPN SOT-23 Q 909 Si NPN SOT-23 Q 910 Si NPN SOT-23 Q 911 Si NPN SOT-23 Q 912 Si NPN SOT-23 Q 913 Si NPN SOT-23 Q 914 Si NPN SOT-23 Q 915 Si NPN SOT-23...

  • Page 196: Ocxo Drawer Power Supply

    PARTS LIST SYMBOL NUMBER DESCRIPTION R 974 39k ohm 5% 1206 SMD R 975 51 ohm 5% 1206 SMD R 976 15k ohm 5% 1206 SMD R 977 15k ohm 5% 1206 SMD S 901 Toggle switch on-none-mom S 902 Toggle switch on-none-mom S 903 Toggle switch on-none-mom...

  • Page 197: Main Processor Card

    SYMBOL NUMBER DESCRIPTION MAIN PROCESSOR CARD PART NO. 023-2000-310 C 001 10 pF 5% NPO 1206 chip C 002 20 pF 5% NPO 1206 chip C 004 .01 F 10% X7R chip C 005 .01 F 10% X7R chip C 006 .01 F 10% X7R chip C 007 .01 F 10% X7R chip...

  • Page 198: Main Audio Card

    PARTS LIST SYMBOL NUMBER DESCRIPTION R 026 10k ohm 5% 1206 SMD R 027 10k ohm 5% 1206 SMD R 028 4.7k ohm 5% 1206 SMD R 029 10k ohm 5% 1206 SMD R 030 10k ohm 5% 1206 SMD R 031 10k ohm 5% 1206 SMD R 032...
  • Page 199 SYMBOL NUMBER DESCRIPTION C 127 680 pF 2% NPO 1206 C 128 .0033 F 2% NPO 1206 C 129 470 pF 2% NPO 1206 C 130 470 pF 2% NPO 1206 C 131 .0047 F 5% X7R 1206 C 132 .0056 F 2% NPO 1206 C 133 .0047 F 2% NPO 1206...
  • Page 200 PARTS LIST SYMBOL NUMBER DESCRIPTION C 224 .01 F 10% X7R chip C 225 .01 F 10% X7R chip C 226 .01 F 10% X7R chip C 227 .01 F 10% X7R chip C 228 .01 F 10% X7R chip C 229 .01 F 10% X7R chip C 230...
  • Page 201 SYMBOL NUMBER DESCRIPTION HW102 Rivet snap 0.142 dia J 100 Green horizontal tip jack .080 105-2204-105 J 101 Speaker jack 0.1 enclosed J 102 3.6mm jack enclosed J 103 Black horiz tip jack .080 J 104 3.6mm jack enclosed J 105 3-pin single inline header J 106 5-pin single inline header...
  • Page 202 PARTS LIST SYMBOL NUMBER DESCRIPTION R 175 4.3k ohm 5% 1206 SMD R 176 6.8k ohm 5% 1206 SMD R 177 100k ohm 5% 1206 SMD R 178 100k ohm 5% 1206 SMD R 179 300 ohm 5% 1206 SMD R 180 300 ohm 5% 1206 SMD R 181...
  • Page 203 SYMBOL NUMBER DESCRIPTION R 276 18k ohm 5% 1206 SMD R 277 5.1k ohm 5% 1206 SMD R 279 150k ohm 5% 1206 SMD R 280 150k ohm 5% 1206 SMD R 281 1M ohm 5% 1206 SMD R 282 10k ohm 5% 1206 SMD R 283 Zero ohm 5% 1206 SMD...

  • Page 204: Interface Alarm Card

    PARTS LIST SYMBOL NUMBER DESCRIPTION U 157 D flip flop SOIC 74HC574 U 158 Quad analog sw SOIC DG202 544-3003-001 U 159 Quad analog sw SOIC DG202 544-3003-001 U 160 9 bit x 64 word FIFO DIP-28 544-3764-703 U 161 9 bit x 64 word FIFO DIP-28 544-3764-703 U 162 Dr/Rcvr RS232C V.28 145406 544-2023-014 U 163 Dual op amp SOIC LM2904 U 164 Dual op amp SOIC LM2904...
  • Page 205 SYMBOL NUMBER DESCRIPTION J 504 3-pin single inline header J 505 4-pin single inline header K 500 12V SPDT 1A relay submin K 501 12V SPDT 1A relay submin K 502 12V SPDT 1A relay submin K 503 12V SPDT 1A relay submin L 501 3 H filter choke PC mount P 500...
  • Page 206 PARTS LIST SYMBOL NUMBER DESCRIPTION S 500 4-pos recessed DIP switch S 501 4-pos recessed DIP switch S 502 4-pos recessed DIP switch S 503 4-pos recessed DIP switch S 508 Toggle switch on/on rt angle U 500 1 of 16 demux SOIC 74HC154 544-3766-154 U 501 1 of 16 demux SOIC 74HC154 544-3766-154 U 503 D flip flop SOIC 74HC574 U 504 D flip flop SOIC 74HC574...

  • Page 207: Section 10 Schematics And Component Layouts

    SECTION 10 SCHEMATICS AND COMPONENT LAYOUTS TRANSISTORS TRANSISTORS Part Number Basing Diagram 576-0001-300 576-0002-603 576-0003-600 576-0003-602 576-0003-604 576-0003-612 576-0003-636 576-0003-657 576-0003-658 576-0004-098 576-0004-820 576-0004-821 576-0006-109 DIODES 523-1504-002 523-1504-012 523-1504-015 523-1504-016 523-1504-023 523-2016-180 523-2016-479 523-2016-519 523-2016-629 523-2016-919 523-5004-002 VIEW Identification R2/R3 3604 8E/Z1 8F/Z2...

  • Page 208: Rf Module Interface Connector

    SCHEMATICS AND COMPONENT LAYOUTS Figure 10-1 RF MODULE INTERFACE CONNECTOR Figure 10-2 BACKPLANE CABLE CONNECTIONS March 1999 Part No. 001-2009-600 10-2...

  • Page 209: 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 March 1999 10-3 Part No. 001-2009-600...
  • Page 210 REAR CONNECTOR BOARD BACKPLANE BACKPLANE A9 P3-P5-P7-P12 P14-P16-P18 24 HSDB+ 56 HSDB- RF MUX 3 INH 14 25 IRDB+ P3-P5-P7-P12 PC STR 15 P14-P16-P18 57 IRDB- LPTT 21 20 TLA DB+ HS CS EX 16 52 TLA DB- SYN CS EX 26 P2-P4-P6-P8 P2-P4-P6-P8 P13-P15-P17...

  • Page 211: Backplane Interconnect

    P3-P5-P7-P12-P14-P16-P18 REPEATER I/O VOTER DATA IN 19 +15V ACC 23 +15V +15V ACC 24 ALARM 1 IN + 27 ALARM 1 IN - 28 ALARM 1 OUT + 31 ALARM 1 OUT - 32 ALARM 2 IN + 29 ALARM 2 IN - 30 ALARM 2 OUT + 33 ALARM 2 OUT - 34 AC FAIL OUT 26...

  • Page 212: Rf Interface Board Component Layout

    Q107 CR104 R180 R179 R193 WO117 GROUND C114 + WO110 WO111 WO113 WO112 WO105 F102 L101 WO104 WO106 WO103 WO143 WO116 +26.5V J101 WO102 WO101 C117 WO118 WO144 +15V +15V F101 WO108 WO109 WO121 FORWARD REFLECTED WO145 POWER WO119 GROUND U108 C128 R178...

  • Page 213: Rf Interface Board Schematic

    R137 R119 PC STR 2 R138 R120 R135 R121 R122 R136 R123 U103 R124 R125 MC14094BD R126 R127 R139 WO 101 R101 R128 WO 102 Q101 R139 3657 WO 104 R141 C105 R130 39pF 15 OE WO 105 R131 R140 R142 WO 106 R132...

  • Page 214: Receiver Board Component Layout

    J201 C341 C353 WO16 C352 C342 C354 C339 C287 C292 C286 C291 R281 R264 U206 R315 R256 C289 C290 R284 C235 R323 C231 Y201 C240 R324 L216 C233 R229 C292 Z205 Z213 C315 R215 U202 R213 L224 EP11 R322 C317 L225 C375 R254...

  • Page 215: Receive Vco Component Layout

    SCHEMATICS AND COMPONENT LAYOUTS Figure 10-14 RECEIVE VCO COMPONENT LAYOUT March 1999 Part No. 001-2009-600 10-9...

  • Page 216: Receive Vco Schematic

    SCHEMATICS AND COMPONENT LAYOUTS +12V WO 805 R814 MOD IN WO 801 WO 804 WO 807 WO 808 TO RESONATOR TAP WO 802 CONTROL IN WO 803 C805 Figure 10-15 RECEIVE VCO SCHEMATIC March 1999 Part No. 001-2009-600 NOTES: 1. RESISTORS ARE IN OHMS AND CAPACITORS IN MICROFARADS UNLESS OTHERWISE SPECIFIED.

  • Page 217: Receiver Schematic

    +12V + C336 C311 R202 R203 C337 .001 56pF + C203 C204 33pF L204 L205 L206 L201 L202 L203 RF AMP C205 6.8pF R201 L227 C201 C202 2.7k A201 5.6pF 4.3pF L221 L226 Q201 RF IN 3636 C371 C207 R204 1.3pF R321 J202...

  • Page 218: Exciter Board Component Layout

    WO417 J402 C436 WO425 WO427 WO429 C466 C438 R491 R427 R449 C467 + R425 U407 R489 EP404 R487 R415 + C476 C408 C460 R411 C406+ R476 C462 C409 R424 CR403 R474 R414 C464 C426 + Q405 R472 CR401 R471 Y401 R473 C472 + + C474...

  • Page 219: Transmit Vco Component Layout

    SCHEMATICS AND COMPONENT LAYOUTS *C814 IS PLACED ON TOP OF R807 C814* Figure 10-18 TRANSMIT VCO COMPONENT LAYOUT March 1999 Part No. 001-2009-600 10-13...

  • Page 220: Transmit Vco Schematic

    SCHEMATICS AND COMPONENT LAYOUTS +12V WO 805 R814 MOD IN WO 801 WO 804 WO 807 WO 808 TO RESONATOR TAP WO 802 CONTROL IN WO 803 C805 Figure 10-19 TRANSMIT VCO SCHEMATIC March 1999 Part No. 001-2009-600 NOTES: 1. RESISTORS ARE IN OHMS AND CAPACITORS IN MICROFARADS UNLESS OTHERWISE SPECIFIED.

  • Page 221: 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 222: Power Amplifier Component Layout

    WO508 WO510 WO516 R521 C574 C573 CR503 R520 R519 WO513 C567 R509 C568 R515 C571 CR502 C567 C569 R511 R510 EP514 C556 Q503 C564 WO502A EP515 EP516 EP517 R508 EP512 EP513 EP511 C550 Q502 C542 EP510 March 1999 Part No. 001-2009-600 WO512 WO509 C585...

  • Page 223: Power Amplifier Schematic

    +15V EP501 EP502 WO 505 POWER CONTROL + C510 C508 C509 + C505 C506 C507 C518 56pF 27pF .018 56pF 56pF EP504 + C516 C515 C517 L501 .018 56pF EP503 C502 + C503 C504 .018 + C513 C511 C511 56pF 56pF 1 dB PAD R528...

  • Page 224: Power Amplifier Component Layout

    R724 WO514A C760 R725 C758 R717 C769 C755 R719 WO510 C575 WO513A R718 R730 C770 R710 WO512A R715 C730 R711 C728 R703 C765 C725 R705 C727 R709 WO511A R704 EP715 EP716 EP714 C747 C745 Q704 R716 Q703 C733 C735 EP713 EP712 EP711 EP707...

  • Page 225: W Power Amplifier Schematic

    POWER CONTROL +15V WO505 EP501 EP513 + C520 + C519 + C514 + C512 C518 C513 C515 L501 .018 .018 56pF C502 C516 L502 43pF 39pF R505 C501 R502 120pF WO509 Q501 RF INPUT R504 4098 R507 C503 4.7pF C504 C507 C508 C511...

  • Page 226: Forward/Reverse Power Board Component Layout

    WO651 WO650 MP651 L653 CR651 C684 C654 C683 R658 R659 C669 C670 R688 R663 WO653 L657 MP652 R675 R678 L656 C667 R673 U652 U653 R680 C678 C682 R683 C661 C676 R682 FORWARD/REVERSE POWER BOARD COMPONENT LAYOUT FIGURE 10-25 March 1999 10-20 Part No.
  • Page 227 C671 27pF R662 U651A 2904 R664 U651B R667 2904 R663 WO 654 FORWARD C672 POWER 27pF SENSE C664 27pF R665 R688 C673 .001 C681 R666 .001 NOTES: 1. ALL RESISTORS ARE IN OHMS, CAPACITORS IN MICROFARADS AND INDUCTORS IN MICROHENRYS UNLESS OTHERWISE SPECIFIED. 10-21 RF OUT WO 651...

  • Page 228: Ocxo Component Layout

    J901 F901 C927 +15V GROUND CR907 OCXO - OCXO + ALARM RELAYS REMOTE - REMOTE + K902 K903 K901 RF ALARM OUT + RF ALARM OUT - OCXO 1 ALARM + OCXO 1 ALARM - C929 OCXO 2 ALARM + OCXO 2 ALARM - K904 K905...

  • Page 229: Ocxo Schematic

    J902 INPUT BNC WO 902 10 MHz FROM C901 150pF R903 C902 R901 R902 CR901 RF OUT OCXO 1 Y901 DC IN 10 MHz C925 CASE GND J901 REMOTE + 6 CR902 R905 S904 R906 200 +15V U908 4N35 R908 CR903 R907 2.4k...

  • Page 230: Ocxo Power Supply Component Layout

    J101 230V AC AC INPUT AC FUSE F101 T101 115V AC S101 C101 March 1999 Part No. 001-2009-600 U102 C103 C111 C110 + C105 + C102 + C112 C109 + R102 R101 C107 C104 + C106 C108 CR105 WO101 WO102 WO103 WO104 AC SENSE...
  • Page 231 S101 115V F101 J101 230V AC POWER INPUT 10-25 VOUT A +13.8V U101 V IN LM117T VOUT B C103 C101 C102 .001 1000 R102 C106 R101 C104 C105 2.49k March 1999 Part No. 001-2009-600 +15V U102 CR105 VOUT A V IN LM29940T-5 C107 C110...

  • Page 232: Main Processor Card Component Layout

    MAIN PROCESSOR CARD COMPONENT LAYOUT FIGURE 10-31 March 1999 Part No. 001-2009-600 10-26...

  • Page 233: Main Processor Card Schematic (1 Of 2)

    MAIN MICROPROCESSOR +15V A0 42 U15F 2.2k A1 10 A2 41 U15E 2.2k A4 40 MPD70320L-5 U15D 2.2k A6 39 U15C 2.2k A8 38 U15B 2.2k A10 37 A12 36 ALARM DISPLAY DISPLAY DRIVER A14 35 CTS0 A16 34 CTS1 A18 33 14495L DMARQ0...

  • Page 234: Main Processor Card Schematic (2 Of 2)

    U20D MSTB J1-16 (1) U6-15 (1) TX FIFO U27-67 (1) U27-11 (1) 74HC7030 25 DO +12V 1.2k 1.2k U32A HSDB- 74CT244 P1-56 (1) HSDB+ P1-24 (1) 8 A3 1 OE 65176 U30B U31C GND RE 4.7k U31B U30C SOURCE +15V +12V U32B 3812...

  • Page 235: Main Audio Card Component Layout (Opposite Component Side)

    C179 R248 C235+ R298 R179 R180 R256 C193 C224 R177 C266 R317 C194 R258 R298 R314 R267 C209 RT100 C213 R118 R225 R114 R117 C117 R214 C114 R215 R113 R126 C116 +C240 R121 R230 R231 C174 C187 C119 R277 R298 R115 R298 R298...

  • Page 236: Main Audio Card Component Layout (Component Side)

    R278 CR111 CR112 R221 C273 C195 R232 R204 R274 R287 U126 R165 C142 R167 R162 C136 C267 + R212 R213 R134 C186 R135 C164 R136 R250 C171 U124 C241 + C189 C121 C242 + R102 C101 R247 C234 R281 R252 C102 C236 R104...

  • Page 237: Main Audio Card Schematic (1 Of 3)

    ADDRESS LATCH U133 74HC574 ADDRESS LATCH U103 74HC573 RX FIFO Q1 2 MPC LATCH D1 2 A10 37 19 G2 A12 36 A14 35 U101 A16 34 U154B TX FIFO A18 33 MREQ 15 MSTB 16 RD 47 WR 48 HSDB+ 24 HSDB- 56 IRDB+ 25...
  • Page 238 C235 R249 R248 R233 P100 120k 100k VOTER AUDIO 25 C100 U108-19 (1) U120A 470pF 2904 U115A VOTER AUDIO MUTE C281 R452 R237 820pF 100k C236 C101 U121B .001 .0022 U121A 2904 R102 C103 R101 R247 2904 147k 29.4k 54.9k RX WB AUDIO 27 R103 C104...

  • Page 239: 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 SECONDARY R242 3303 GATE 2.2k 100k AUDIO FROM RNT U153A R195 U131D DATA LEVEL C153 R193 3303 TEST GATE U107-18 (1) TXS TO FSK TXS- 4 R192...

  • Page 240: Interface Alarm Card Component Layout

    R575 U522 C506 U519 J505 R505 C526 R510 U506 CR522 U509 U507 C503 R573 R574 C528 R571 C506 Q502 Q503 C517 Q500 Q501 R537 R526 CR532 C535 C537 R534 R533 U514 C538 C534 R523 R522 Q504 Q505 R551 R512 R563 CR528 U518 U508...

  • Page 241: Interface Alarm Card Schematic

    P500 D0 46 D1 14 D2 45 ADDRESS LATCH R520 D3 13 U508B 2.7k D4 44 U501 U518 D5 12 R516 74HC154 74HC574 U508C 2.7k D6 43 U508A D7 11 R517 74HC906 2.7k A12 36 R519 U508E 2.7k A14 35 ADDRESS LATCH R518 U508D...

  • Page 242: Backplane Component Layout (Card Side)

    1 33 1 33 1 33 1 33 32 64 32 64 32 64 32 64 1 17 1 17 1 17 1 17 1 33 1 33 1 33 32 64 32 64 32 64 1 17 1 17 1 17 BACKPLANE COMPONENT LAYOUT March 1999...
  • Page 243 25 26 WO16 WO17 WO4 WO1 WO13 WO5 WO8 33 34 33 34 March 1999 Part No. 001-2009-600 10-37 BACKPLANE COMPONENT LAYOUT (CABLE SIDE) FIGURE10-42...

  • Page 244: Backplane Schematic

    P3, P5, P7, P12, P14, P16, P18 MREQ MSTB COM 17 COM 49 SYNC IN WO 16 COM 50 SYNC IN COM 50 WO 17 +15V +15V FILT FILT TLA+ TLA- LPTT COM 53 RNT TX DATA COM 54 RNT RX DATA COM 55 HSDB+ HSDB-...

  • Page 245: Power Supply Component Layout (Opposite Component Side)

    R216 Q126 U120 R249 R250 R211 R222 U119 R246 R215 R235 C171 R198 R239 R236 R217 R199 R189 R237 R200 CR130 C170 R210 R242 CR124 R205 R209 R243 R206 R201 CR125 R247 CR131 R248 CR127 C160 + Q124 Q123 Q131 C161 R267 R268...

  • Page 246: Power Supply Component Layout (Component Side)

    RT102 RT101 EP105 EP101 L107 T101 EP103 C101 R113 EP104 C106 R114 CR145 CR109 Q101 T105 C110 C107 T106 C111 CR129 CR135 C188 W113 W111 C166 R254 W109 C187 C209 T109 L105 C186 Q132 CR132 CR126 Q125 U114 C205 J102 Q116 Q118 A803...

  • Page 247: Power Supply Schematic (1 Of 2)

    18,19,20 16,17 14,15 POWER FACTOR CHOKE L107 12,13 CR106 9,10 EP108 150V DC IN RUSH CURRENT CR105 BATTERY BACKUP LIMITERS RT101 RT102 EP105 DC INPUT (+) R101 R105 R108 R109 EP104 330k 330k DC INPUT (-) BLACK R102 R106 R110 R120 EP109 330k...

  • Page 248: Power Supply Schematic (2 Of 2)

    +15V BUCK CONTOLLER 5 R T R223 8 S S + C178 +15V 15 Vcc 13 VC + C180 C181 10 GND A 14 OUT +26.5V + C163 CR124 2700 R200 R198 R199 Q122 R205 6026 U104 R206 SOURCE SOURCE +15V R201 U105...

  • Page 249: Power Supply Filter Board Component Layout

    AC HOT EARTH GROUND NEUTRAL CHASSIS GROUND 10-43 POWER SUPPLY FILTER BOARD COMPONENT LAYOUT FIGURE 10-48 1.8uH 8.67nH .0022 .0022 POWER SUPPLY FILTER BOARD SCHEMATIC FIGURE 10-49 March 1999 Part No. 001-2009-600 WO1 AC HOT WO5 POS OUT WO3 NEUTRAL WO4 NEG GRN/YEL WO2 CHASSIS GND...

  • Page 250: Battery Back-Up Component Layout

    CR101 R101 C130 C129 W103 F101 EP102 K101 C101 CR113 EP101 CR102 EP103 Q103 R121 S101 R125 U101 R117 R128 R127 R129 CR111 CR105 C155 C114 W106 R157 R158 CR118 C107 C105 W102 MH107 C126 R111 R165 R104 R103 R105 R138 C119 R139...

  • Page 251: Battery Back-Up Schematic

    HIGH CURRENT TRACE (30A) C101 +24V BATTERY REMOTE ENABLE SOURCE ON/OFF +24V Q101 Q102 6026 6026 CR113 EP101 DC INPUT (+) CR101 CR102 R102 R107 REVERSE BATTERY INPUT BATTERY +24V DC R101 R103 R108 4.7k EP102 DC INPUT (-) R165 R104 R106 R109...
  • Page 252 BACKPLANE POWER CABLE CONNECTOR AND SCHEMATIC FIGURE 10-52 POWER HARNESS +26.5V GROUND RFIB +15V AC FAIL IN POWER SWITCH THERMAL SENSOR +15V REPEATER BACKPLANE GROUND GROUND March 1999 Part No. 001-2009-600 EP106 C106 EP101 EXPAND IN (WO101 MAC) C101 C103 EXP CAP GCELL IN 1 R101...

  • Page 253: Schematics And Component Layouts

    BACKPLANE Figure 10-54 POWER CABLE CONNECTOR AND SCHEMATIC SCHEMATICS AND COMPONENT LAYOUTS POWER HARNESS +26.5V GROUND RFIB +15V AC FAIL IN POWER SWITCH THERMAL SENSOR +15V GROUND GROUND 10-47 REPEATER BACKPLANE March 1999 Part No. 001-2009-600...

  • Page 254: Compandor Schematic

    SCHEMATICS AND COMPONENT LAYOUTS EP106 C103 EXP CAP C104 V REF C109 COMP CAP1 C110 COMP CAP2 R102 I REF Figure 10-55 COMPANDOR SCHEMATIC Figure 10-56 COMPANDOR COMPONENT LAYOUT March 1999 Part No. 001-2009-600 C106 EP101 EXPAND IN (WO101 MAC) C101 GCELL IN 1 R101...

  • Page 255: Appendix A 900 Mhz Channel Frequency Chart

    APPENDIX A 900 MHz CHANNEL FREQUENCY CHART Program Repeater Channel Channel Transmit Number Number Frequency 935.0125 935.0250 935.0375 935.0500 935.0625 935.0750 935.0875 935.1000 935.1125 935.1250 935.1375 935.1500 935.1625 935.1750 935.1875 935.2000 935.2125 935.2250 935.2375 935.2500 935.2625 935.2750 935.2875 935.3000 935.3125 935.3250 935.3375 935.3500...

  • Page 256: 900 Mhz Channel Frequency Chart

    900 MHz CHANNEL FREQUENCY CHART Program Repeater Channel Channel Transmit Number Number Frequency 936.1125 936.1250 936.1375 936.1500 936.1625 936.1750 936.1875 936.2000 936.2125 936.2250 936.2375 936.2500 936.2625 936.2750 936.2875 936.3000 936.3125 936.3250 936.3375 936.3500 936.3625 936.3750 936.3875 936.4000 936.4125 936.4250 936.4375 936.4500 936.4625 936.4750...
  • Page 257 Program Repeater Channel Channel Transmit Number Number Frequency 937.3125 937.3250 937.3375 937.3500 937.3625 937.3750 937.3875 937.4000 937.4125 937.4250 937.4375 937.4500 937.4625 937.4750 937.4875 937.5000 937.5125 937.5250 937.5375 937.5500 937.5625 937.5750 937.5875 937.6000 937.6125 937.6250 937.6375 937.6500 937.6625 937.6750 937.6875 937.7000 937.7125 937.7250 937.7375...
  • Page 258 900 MHz CHANNEL FREQUENCY CHART Program Repeater Channel Channel Transmit Number Number Frequency 938.5125 938.5250 938.5375 938.5500 938.5625 938.5750 938.5875 938.6000 938.6125 938.6250 938.6375 938.6500 938.6625 938.6750 938.6875 938.7000 938.7125 938.7250 938.7375 938.7500 938.7625 938.7750 938.7875 938.8000 938.8125 938.8250 938.8375 938.8500 938.8625 938.8750...
  • Page 259 Program Repeater Channel Channel Transmit Number Number Frequency 939.7125 939.7250 939.7375 939.7500 939.7625 939.7750 939.7875 939.8000 939.8125 939.8250 939.8375 939.8500 939.8625 939.8750 939.8875 939.9000 939.9125 939.9250 939.9375 939.9500 939.9625 939.9750 939.9875 900 MHz CHANNEL FREQUENCY CHART Repeater Receive Frequency 900.7125 900.7250 900.7375 900.7500...
  • Page 260 900 MHz CHANNEL FREQUENCY CHART This page intentionally left blank. March 1999 Part No. 001-2009-600...

This manual is also suitable for:

242-2009-634

Table of Contents