Galaxy Tracking Systems VTRAKF450 UHF-FM Vehicle Tracking System User Manual Cover
Galaxy Tracking Systems L.L.C. UHF-FM Vehicle Tracking System Cover
Contents
- 1. Manual1
- 2. Manual2
- 3. Service Manual
Service Manual
HIGH SPECIFICATION DATA TRANSCEIVER PART NO. 242-3474-XX0 Second Printing August 1998 Part No. 001-3474-002 8-98 Printed in U.S.A. HIGH SPECIFICATION DATA TRANSCEIVER PART NO. 242-3474-XX0 Copyright 1998 by the Johnson Data Telemetry Corporation. The Johnson Data Telemetry Corporation designs and manufactures radios and radio modems to serve a wide variety of data communication needs. The Johnson Data Telemetry Corporation produces equipment for the fixed data market including SCADA systems for utilities, petrochemical, waste and fresh water management markets and RF boards for OEM applications in the Radio Frequency Data Capture market. DATA TELEMETRY PRODUCT WARRANTY The manufacturer's warranty statement for this product is available from your product supplier or from the Johnson Data Telemetry Corporation, 299 Johnson Avenue, Box 1733, Waseca, MN 56093-0833. Phone (507) 835-8819. WARNING This device complies with Part 15 of the FCC rules. Operation is subject to the condition that this device does not cause harmful interference. In addition, changes or modification to this equipment not expressly approved by Johnson Data Telemetry Corporation could void the user's authority to operate this equipment (FCC rules, 47CFR Part 15.19). DO NOT allow the antenna to come close to or touch, the eyes, face, or any exposed body parts while the radio is transmitting. DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere. DO NOT operate the radio unless all the radio frequency connectors are secure and any open connectors are properly terminated. DO NOT allow children to operate transmitter equipped radio equipment. SAFETY INFORMATION Proper operation of this radio will result in user exposure below the Occupational Safety and Health Act and Federal Communication Commission limits. The information in this document is subject to change without notice. is a trademark of the Johnson Data Telemetry Corporation. TABLE OF CONTENTS GENERAL INFORMATION 1.1 1.2 SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 EQUIPMENT DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 DM3474 SYNTHESIZER PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 TRANSCEIVER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 PART NUMBER BREAKDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 FACTORY CUSTOMER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 IF A PROBLEM ARISES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4 FACTORY REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4 GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5 1.3 1.4 1.5 1.6 1.7 1.8 1.9 INSTALLATION 2.1 2.2 PRE-INSTALLATION CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 INTERFACING WITH DATA EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 DM3474 ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 PROGRAMMING 3.1 3.2 3.3 3.4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 DM3474 SYNTHESIZER DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 D-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 B-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 A-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 RECEIVE TO TRANSMIT SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6 TRANSMIT TO RECEIVE SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7 CIRCUIT DESCRIPTION 4.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 RECEIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 VOLTAGE-CONTROLLED OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5 VCO AND REFERENCE OSCILLATOR MODULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 CASCODE AMPLIFIERS (Q851/Q852). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 AMPLIFIER (Q853) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 VOLTAGE FILTER (Q832) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 VCO FREQUENCY SHIFT (Q831) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 SYNTHESIZER INTEGRATED CIRCUIT (U801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7 LOCK DETECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7 4.2 TABLE OF CONTENTS 4.3 4.4 RECEIVER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 HELICAL FILTER (Z201), RF AMPLIFIER (Q201) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 MIXER (U221), FIRST LO AMPLIFIER (Q301) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 AMPLIFIER (Q222), CRYSTAL FILTER (Z221/Z222), IF AMP (Q221). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 SECOND LO AMP/TRIPLER (Q401), SECOND IF FILTER (Q901) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 SECOND MIXER/DETECTOR (U241) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 TRANSMITTER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 BUFFER (Q851) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 PRE-DRIVER (Q501), DRIVER (Q521) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 -5V POWER CONTROL SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 FINAL (Q541), POWER CONTROL (U542) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 ANTENNA SWITCH (CR561, CR562). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 SERVICING 5.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PERIODIC CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SURFACE-MOUNTED COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REPLACEMENT PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TCXO MODULE NOT SERVICEABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYNTHESIZER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REFERENCE OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYNTHESIZER (U801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RECEIVER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIXER/DETECTOR (U201) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RF AMPLIFIER (Q201) AND FIRST MIXER (Q221) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RF AND IF AMPLIFIERS, FIRST MIXER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRANSMITTER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 5.3 5.4 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS 6.1 6.2 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DL3474 TRANSCEIVER ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FREQUENCY AND CONTROL LINE VOLTAGE CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2W TRANSMITTER POWER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LOW POWER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MODULATION FLATNESS ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RECEIVER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IF AND AUDIO ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PARTS LIST ii 5-1 5-1 5-1 5-1 5-1 5-1 5-1 5-1 5-2 5-2 5-2 5-3 5-3 5-3 5-4 5-4 5-4 5-4 6-1 6-1 6-1 6-1 6-2 6-3 6-4 6-4 TABLE OF CONTENTS SCHEMATICS AND COMPONENT LAYOUTS VCO COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRANSCEIVER COMPONENT LAYOUT-COMPONENT SIDE VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRANSCEIVER COMPONENT LAYOUT-OPPOSITE SIDE VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRANSCEIVER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 8-3 8-4 8-5 LIST OF FIGURES 3-1 3-2 3-3 3-4 3-5 3-6 4-1 4-2 4-3 5-1 5-2 6-1 6-2 6-3 8-1 8-2 8-3 8-4 D-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 B-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 A-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 SERIAL INPUT WORD FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 RX TO TX TIMING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 TX TO RX TIMING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 DATA TRANSCEIVER BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 U801 SYNTHESIZER BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 U241 BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 RECEIVER SERVICING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 TRANSMITTER SERVICING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 TRANSMITTER TEST SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 RECEIVER TEST SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 ALIGNMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 VCO COMPONENT LAYOUT (COMPONENT SIDE VIEW). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 TRANSCEIVER COMPONENT LAYOUT (COMPONENT SIDE VIEW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 TRANSCEIVER COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW) . . . . . . . . . . . . . . . . . . . . 8-4 TRANSCEIVER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5 LIST OF TABLES 1-1 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 iii TABLE OF CONTENTS This page intentionally left blank. iv SECTION 1 GENERAL INFORMATION 1.1 SCOPE OF MANUAL This service manual contains alignment and service information for the Johnson Data Telemetry (JDT) DM3474 UHF High Specification Data Module Transceiver. 1.2 EQUIPMENT DESCRIPTION 1.2.1 GENERAL The JDT DM3474 is a synthesized data transceiver (transmitter and receiver) which operates in the 403-512 MHz UHF frequency range. Transmitter power output is 2 watts nominal, and operation is simplex or half duplex. ± Versions of the 3474 covered in this manual are indicated in Section 1.4. The 3474 has a frequency stability of 1.5 PPM (see Section ). The number of channels that can be selected with the DM3474 model is determined by the customer supplied synthesizer loading circuitry. 1.2.2 DM3474 SYNTHESIZER PROGRAMMING The DM3474 requires customer supplied circuitry to load the synthesizer with channel information. The protocol that this circuitry must follow is described in Section . 1.3 TRANSCEIVER IDENTIFICATION The transceiver identification number is printed on a label that is affixed to the PC board. The following information is contained in that number: Model 3474 Revision Letter Range Eighth Digit of PN Manufacture Date Plant Warranty Number 14 3 12345 Week No. of Year Year 1-1 Part No. 001-3474-002 GENERAL INFORMATION 1.4 PART NUMBER BREAKDOWN The following is a breakdown of the part number used to identify this transceiver: 242-3474 - X Y Z 0 = Base 2 = Portable 1 = 12.5 kHz BW 2 = 20 kHz BW 3 = 25 kHz BW 8 = 12.5 kHz BW * 9 = 25 kHz BW * 1 = 380-403 MHz 2 = 403-419 MHz 3 = 419-435 MHz 4 = 435-451 MHz 5 = 450-466 MHz, 450-470 MHz 6 = 464-480 MHz 7 = 480-496 MHz 8 = 496-512 MHz * This number applies to 450-470 MHz transceivers. 1.5 ACCESSORIES Accessories available for the 3474 data transceiver are listed in Table 1-1. Table 1-1 ACCESSORIES Accessory MCX to SMA RF cable Part No. 023-3472-009 1.6 FACTORY CUSTOMER SERVICE The Customer Service Department at JDT provides customer assistance on technical problems and the availability of local and factory repair facilities. Customer Service hours are 7:30 a.m. - 4:30 p.m. Central Time, Monday - Friday. From within the continental United States, the Customer Service Department can be reached at this toll-free number 1-800-992-7774 1-2 Part No. 001-3474-002 GENERAL INFORMATION When your call is answered at JDT, you will hear a brief message that contains the options: “1” for Sales, “2” for Order Entry, “3” for Customer Service, “4” for Marketing, “7” for other issues, or “9” to repeat the message. When you enter a first number of “3”, you may enter “1” for Technical Assistance, “2” for Product Repair or “3” for Warranty. This number may be entered during or after the message using a tone-type telephone. If you have a pulse-type telephone wait until the message is finished and an operator will come on the line to assist you. You can enter the four digit extension number of the person that you want to reach at any time. If you are calling from outside the continental United States, the Customer Service numbers are: Customer Service Department - (507) 835-6911 FAX Machine - Cust Serv(507) 835-6969 You can contact the Customer Service Department by mail or email. Please include any information that may help solve your problem. The mailing or email addresses are: Johnson Data Telemetry Corporation Customer Service Department 299 Johnson Avenue P.O. Box 1733 Waseca, MN 56093-0514 support@johnsondata.com 1.7 PRODUCT WARRANTY The warranty statement for this transceiver is available from the Warranty Department at JDT (see address or telephone number in Section 1.6). The Warranty Department may also be contacted for Warranty Service Reports, claim forms, or any questions concerning warranties or warranty service. 1.8 REPLACEMENT PARTS Replacement parts can be ordered directly from the Service Parts Department. To order parts by phone, dial the toll-free number and then enter “3” as described in Section 1.6. When ordering, please supply the part number and quantity of each part ordered. JDT customers should give their account number.If there is uncertainty about the part number, include the model number of the equipment the part is from (refer to Section 1.3). You can send your order by mail or FAX (see Section 1.6 for mailing address). Mail orders should be sent to the Service Parts Department. FAX Machine - Sales (507) 835-6648 1-3 Part No. 001-3474-002 GENERAL INFORMATION 1.9 IF A PROBLEM ARISES... JDT products are designed for long life and failure-free operation. If a problem arises, factory service is available. Contact the Customer Service Department before returning equipment. A service representative may suggest a solution eliminating the need to return equipment. 1.9.1 FACTORY REPAIR Component level repair is not recommended on the DM3474 Transceiver. Surface mount technology is used to install many components that require specialized training and equipment to service board level components. JDT’s factory is best equipped to diagnose problems and make component level repairs. When returning equipment for repair, fill out a Factory Request Form for each unit to be repaired regardless of warranty status. These forms are available free of charge by calling Customer Service (see Section 1.6). Describe the problem in the space provided and note any prior physical damage to the equipment. Include a form in the shipping container with each unit. Your phone number and contact name are important. There are times when technicians have specific questions that need to be answered in order to identify the problem and repair the equipment. When returning equipment for repair, use a reference number on your paperwork in case you need to call Customer Service about your unit. That number is referenced on the repair order to make it easier to locate your unit in the lab. Return authorization (RA) numbers are not necessary unless you have been given one by the Customer Service Department. They require RA numbers for exchange units or if they want to be aware of a specific problem. If you have been given an RA number, reference this number of the Factory Repair Request Form sent with the unit. The repair lab will contact the Customer Service Department when the unit arrives. 1-4 Part No. 001-3474-002 GENERAL INFORMATION The following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from the Marketing Department. Specifications are subject to change without notice. GENERAL Frequency Range Frequency Control Channel Spacing Mode of Operation Operating Voltage Regulated Supply Voltages RF Input/Output Power and Data Interface Operating Temperature Maximum Dimensions Weight (w/o Loader Bd) FCC Compliance RECEIVER Bandwidth Frequency Stability Sensitivity - 12 dB SINAD RF Input Impedance Spurious and Image Rejection Selectivity Intermodulation FM Hum and Noise Conducted Spurious Receive Current Drain Receive Attack Time Audio Distortion Output Level DM3474 Response DM3474 Minimum Load Impedance TRANSMITTER Bandwidth Frequency Stability TCXO Coupling RF Power Output RF Output Impedance Modulation Distortion 403-512 MHz Synthesized 12.5/20/25 kHz Simplex or Half Duplex +7.5V DC ±10% +5V DC ±5% MCX Jack 14-pin in-line socket, 100 mil center -30° to +60° C (-22° to +140° F) 2.83" L (7.19 cm), 2.19" W (5.56 cm), 0.64" H (1.70 cm) 2.3 oz (65 g) DM3474 customer must apply 16 MHz ±1.5 PPM 0.45 µV 50 ohms -70 dB -60 dB (12.5 kHz), -70 dB (20/25 kHz) -70 dB -40 dB (12.5 kHz), -45 dB (20/25 kHz) -57 dBm < 70 mA nominal < 7 ms (dependent on synthesizer loading implementation) < 3% 600-1200 mV P-P or 200-400 mV RMS (1 kHz at ±3 kHz) ±2 dB from DC to 5 kHz (reference to 1 kHz) 1k ohms 16 MHz ±1.5 PPM DC 2W nominal adjustable to 500 mW (-XX0) 500 mW nominal 50 ohms < 3% 1-5 Part No. 001-3474-002 GENERAL INFORMATION Duty Cycle Transmitter Attack Time Spurious and Harmonic FM FM Hum and Noise Audio Response Data Input Impedance Modulation Response Current Drain 50%, 60 seconds maximum transmit < 7 ms (dependent on synthesizer implementation) -37 dBm -40 dB 12.5 kHz, -45 dB 25 kHz ±1.5 dB from DC to 5 kHz (reference to 1 kHz) Programmable to ±1 dB at the RF band edges via J201, pin 14. 100k ohm ±1 dB from DC to 5 kHz (reference to 1 kHz) < 800 mA at 2W, +7.5V DC 1-6 Part No. 001-3474-002 SECTION 2 INSTALLATION 2.1 PRE-INSTALLATION CHECKS Field alignment should not be required before the 3474 is installed. However, it is a good practice to check the performance to ensure that no damage occurred during shipment. Performance tests are located in Section 6.2. 2.2 INTERFACING WITH DATA EQUIPMENT 2.2.1 DM3474 ONLY Connector J201 on the data transceiver PC board provides the interface with the data equipment. This is a 14pin female connector with .025" square pins on 0.1" centers (Dupont 76308-114). The following is a general description of the various J201 input and output signals. Pin 1 (Ground) - Chassis ground. Pin 2 (+7.5V DC Continuous) - This voltage should be stabilized near +7.5V DC. Variations from +6V to +9V can change power output as much as 6 dB. Pin 3 (+7.5V DC Transmit) - This input should be +7.5V DC in transmit mode only. Pin 4 (+5V DC Receive Control Line) - This input should be +5V DC in the receive mode only, ≤ 0.3 V DC in Tx, input impedance ≥ 10k ohms. Pin 5 (+5V DC Continuous) - This voltage should be stabilized near +5V DC. Pin 6 (Tx Input) - Provides a response of ±1.5 dB from DC to 5 kHz. The sensitivity is approximately 7 kHz deviation per volt RMS. When this input is used, a temperature compensated 2.5V DC bias is required because variations in voltage cause the frequency to change. In addition, the transceiver regulatory compliance must be applied for with the customer supplied modulation limiting/filter circuit and chassis. Pin 7 (Synthesizer Lock) - Output from synthesizer lock detect circuit. Low = unlocked, high = locked. Pin 8 (Synthesizer Enable) - Latch enable signal. A rising edge on this input latches the data loaded into synthesizer IC U801. Pin 9 (Synthesizer Data) - Serial data line used for programming synthesizer IC U801. Pin 10 (Synthesizer Clock) - Software generated serial clock. Data is valid on the rising edge of this signal. 2-1 Part No. 001-3474-002 INSTALLATION Pin 11 (Carrier Detect) - This output is not used at this time. Pin 12 (RSSI Output) - The RSSI (Receive Signal Strength Indicator) output provides a voltage that increases in proportion to the strength of the RF input signal. Pin 13 (Rx Output) - The data output level is 600-1200 millivolts P-P (200-400 mV RMS) with a modulation signal of 1 kHz at 60% of maximum deviation. The output is DC coupled and referenced to +2.5V DC. Load impedance should be 10k-100k ohms. 2-2 Part No. 001-3474-002 SECTION 3 PROGRAMMING 3.1 INTRODUCTION The information in Section 3.2 describes synthesizer programming protocol. This information can be used as a basis for designing the synthesizer programming hardware and software required. 3.2 DM3474 SYNTHESIZER DATA PROTOCOL Programming of the dividers and the charge pumps are performed on a 3-line bus; SYNTH ENABLE, SYNTH DATA, AND SYNTH CLK. On initial power up three 34-bit words are required to load the 3474 Data Transceiver. After the initial load, one 32-bit word can be used to change channels. The SA7025 Synthesizer IC uses four address words; D, C, B and A (see Figure 3-4). The C word is not used in the 3474. The 24- and 32-bit words contain one or four address bits, depending on the address bits, the data is latched into registers. When the A-word is loaded, the data of these temporary registers is loaded together with the A-word into the work registers. 3.2.1 D-WORD Refer to Figure 3-1. TCXO Reference Frequency is 17.5 MHz. Loop Reference Frequency is 50 kHz. Reference Divide (NR) = 17.5 MHz ÷ 50 kHz =350 Decimal or 000101011110 Binary. The 3474 has frequency resolution of 6.25 kHz and 10 kHz. When programming 6.25 kHz frequency resolution use FMOD=8. When programming 10 kHz frequency resolution use FMOD=5. Example: (FCM) ÷ FMOD = 50 kHz ÷ 8 = 6.25 kHz (FCM) ÷ FMOD = 50 kHz ÷ 5 = 10 kHz Where: FCM = Loop Reference Frequency FMOD = Fractional N Modulus Since FMC is the same for both 6.25 kHz and 10 kHz the loop dynamics are very similar and the same loop filter values can be used. 3-1 Part No. 001-3474-002 PROGRAMMING 3.2.2 B-WORD The B-Word is 24-bits long (see Figure 3-2). It contains the Address, Charge Pump setting factor (CN), Binary Acceleration factors (CK, CL), and Prescaler Type (PR). The Charge Pump Current setting (CN) could be changed on a channel-by-channel basis for ultimate rejection of the Fraction N spurious responses close into the carrier frequency. The 3474 synthesizer has an adjust (R855) for the fractional compensation current. The factory preset value will allow CN to be set to the following ranges: Frequency in a Band Lowest TX Highest TX Lowest RX Highest RX CN 86 90 96 100 The value of CN should be interpolated for frequencies between the band edges. With these recommended values of CN, the transceiver should have the fractional spurs minimized far below the levels needed to make ETSI 70 dB adjacent channel RX or TX specifications. Example: Model 3474-530 is a 450-466 MHz transceiver. 458 MHz TX CN = 88 01011000 Binary 458 MHz RX CN = 98 01100010 Binary 3.2.3 A-WORD The A-Word must be sent last (see Figure 3-3). The A-Word contains new data for the loop dividers and is programmed for every channel. The A-Word can be a 24-bit or 32-bit word depending on the state of the flag LONG in the D-Word. The 24-bit word (A0) is sent if LONG=0 and the 32-bit word (A1) is sent if LONG=1. The extra 8-bits in A1 are the CN charge pump settings. Upon power up the D-, B- and A-Words must be sent, but after that only the A1 word needs to be sent. The Fractional-N increment (NF) is a 3-bit word that is channel dependent. NF is used to program the subchannels below the 50 kHz Loop Reference frequency. FCM = 50 kHz and if FMOD = 8, then the Fractional-N increment is: 50 kHz ÷ 8 = 6.25 kHz To program an 18.75 kHz channel: NF = 18.75 kHz ÷ 6.25 kHz NF = 3 3-2 Part No. 001-3474-002 PROGRAMMING NM1 and NM2 are calculated as follows: N = (NM1 + 2) x 64 + NM2 x 65 Where: N = total division ratio NM1 = Number of main divider cycles when prescaler modulus equals 64 NM2 = Number of main divider cycles when prescaler modulus equals 65 Example: Calculate NM1 and NM2 to Receive 454.500 MHz. LO = 454.5 + 52.95 = 507.45 MHz (52.95 MHz IF with High Side Injection) N = RX LO ÷ FCM = 507.45 ÷ 0.05 = 10149 (FMC = Loop Reference Frequency) NM2 = 64 x FRAC [N ÷ 64] = 64 x FRAC [10149 ÷ 64] = 64 x 0.57813 = 37 NM1 = INTEGER [N ÷ 64] - 2 - NM2 = 158 - 2 - 37 = 119 Figure 3-1 D-WORD 3-3 Part No. 001-3474-002 PROGRAMMING Figure 3-2 B-WORD Figure 3-3 A-WORD 3-4 Part No. 001-3474-002 PROGRAMMING Figure 3-4 SERIAL INPUT WORD FORMAT 3-5 Part No. 001-3474-002 PROGRAMMING 3.3 RECEIVE TO TRANSMIT SEQUENCE Refer to Figure 3-5. 1. Synthesizer is loaded (B and A 24-Bit words or one long 32-bit A-Word). 2. The state of the 5RCL line does not have to be changed until the last bit is sent. However, RX will cease as soon as it is changed. 3. The SYNTH ENABLE line should be held HIGH for 2 to 3 milliseconds after the last word is sent. This puts the frequency synthesizer in a SPEEDUP MODE and slightly improves lock times. 4. After the last word is strobed in, 7 milliseconds (worst case) should elapse before 7.5 TX is turned ON. This allows the synthesizer to come within 1 kHz of the desired frequency. Figure 3-5 RX TO TX TIMING DIAGRAM Dekey is a length of time to allow the TX to power down while the synthesizer is still in lock. This is needed to meet ETSI (European Telecommunications Standards Institute) adjacent power specifications. Dekey is approximately 3 ms in length. The 7.5 TX should be ramped or optimally filtered in such a way as to reduce the Sinx/x power spreading. Speedup will slightly improve lock times and is 1 to 2 ms. 3-6 Part No. 001-3474-002 PROGRAMMING 3.4 TRANSMIT TO RECEIVE SEQUENCE Refer to Figure 3-6. 1. 7.5 TX is turned OFF. For best TX adjacent channel power performance this could be shaped. 2. The synthesizer load process could begin slightly before, but when the last bit is strobed in the synthesizer it will become unlocked. For ETSI specs, the TX should be turned OFF “on-frequency”. 3. The 5RCL line should switch from low to high AFTER the 7.5 TX is switched. The 5RCL not only turns the RX circuits on but also Pin Shifts the VCO. 4. For quickest lock times the SYNTH ENABLE line on the last load word should be held high for 2 to 3 milliseconds. It MUST NOT be left high as the synthesizer in the SPEEDUP mode has poor noise performance and would degrade the RX performance. Figure 3-6 TX TO RX TIMING DIAGRAM Speedup is 2 to 3 ms Lock is approximately 7 ms Ramp is approximately 3 ms IMPORTANT If the receiver is to be operated at 510-512 MHz (-810), a spurious condition may occur to degrade the receiver sensitivity 2 to 3 dB. If this degradation is unacceptable, the synthesizer can be reprogrammed to a comparison frequency (FCM) of 31.25 kHz (so that a multiple of this would not be 52.95 MHz) and a modulus (FMOD) of 5 with a reference divide (NR) of 560. These parameters place the spurious at harmonics of 31.25 kHz (instead of 50 kHz) outside the passband of the IF filters where the sensitivity is not degraded. 3-7 Part No. 001-3474-002 PROGRAMMING This page intentionally left blank. 3-8 Part No. 001-3474-002 SECTION 4 CIRCUIT DESCRIPTION 4.1 GENERAL 4.1.1 INTRODUCTION The main subassemblies of this transceiver are the RF board, VCO board, and TCXO. A block diagram of the transceiver is located in Figure 4-1. The VCO board is enclosed by a metal shield and soldered directly to the RF board. The VCO is not serviceable. The 3474 is available with a reference oscillator stability of ±1.5 PPM. The TCXO (Temperature Compensated Crystal Oscillator) is soldered directly to the RF board. 4.1.2 SYNTHESIZER The VCO (voltage-controlled oscillator) output signal is the receiver first injection frequency in the Receive mode and the transmit frequency in the Transmit mode. The first injection frequency is 52.95 MHz above the receive frequency. The frequency of this oscillator is controlled by a DC voltage produced by the phase detector in synthesizer chip U801. Channels are selected by programming counters in U801 to divide by a certain number. This programming is performed over a serial bus formed by the Synth Clock, Synth Enable, and Synth Data pins of J201. This programming is performed by user supplied hardware and software (see Section ). The frequency stability of the synthesizer in both the receive and transmit modes is established by the stability of the reference oscillator described in the preceding section. These oscillators are stable over a temperature range of -30° to +60° C (-22° to +140° F). 4.1.3 RECEIVER The receiver is a double-conversion type with intermediate frequencies of 52.95 MHz / 450 kHz. Two helical bandpass filters reject the image, half IF, injection, and other unwanted frequencies. A four-pole crystal filter enhances receiver selectivity 4-1 Part No. 001-3474-002 CIRCUIT DESCRIPTION 4.1.4 TRANSMITTER The transmitter produces a nominal RF power output of 2W adjustable to 500 mW (-XX0). Frequency modulation of the transmit signal occurs in the synthesizer. Transmit audio processing circuitry is contained in the customer-supplied equipment. 4.2 SYNTHESIZER 4.2.1 INTRODUCTION A block diagram of the synthesizer is shown in Figure 4-1 and a block diagram of Synthesizer IC U801 is shown in Figure 4-2. As stated previously, the synthesizer output signal is produced by a VCO (voltage controlled oscillator). The VCO frequency is controlled by a DC voltage produced by the phase detector in U801. The phase detector senses the phase and frequency of the two input signals and causes the VCO control voltage to increase or decrease if they are not the same. The VCO is then “locked” on frequency. Programming of the synthesizer provides the data necessary for the internal prescaler and counters. One input signal is the reference frequency. This frequency is produced by the 17.5 MHz reference oscillator (TCXO). The other input signal is the VCO frequency. 4-2 Part No. 001-3474-002 CIRCUIT DESCRIPTION RF BPF RF AMP RF BPF Z201 Q201 Z202 MIXER U221 BUFFER 52.95 MHz CRYSTAL FILTER IF AMP IF / 450 kHz FILTER Z221/Z222 Q221 U241 RSSI Q222 RX AUDIO 2nd LO AMP 1st LO AMP RECEIVER Q301 Q401 U251 ANTENNA TRANSMITTER U542 PREDRIVER DRIVER FINAL Q501 Q521 Q541 ANTENNA SWITCH LOW-PASS FILTER CR561/562, RX OUT RSSI TCXO Q833 TX IN Y801 Q851 VCO RF OUT LOCK U801 Q101, Q102 Q831, Q832 Q834 BUFFER/ AMPLIFIER Q853 +5V T/R PS ENABLE CLV VCO Q850 DATA Q851/Q852 NEG SUP AMPLIFIER CLOCK MOD INPUT RF IN MOD ADJUST +7.5V TRANSMIT +7.5V SYNTH OUT RECEIVE +5V +5V SYNTHESIZER Figure 4-1 DATA TRANSCEIVER BLOCK DIAGRAM 4-3 Part No. 001-3474-002 CIRCUIT DESCRIPTION CLOCK DATA SERIAL INPUT + PROGRAM LATCHES VDD STROBE PR Vss EM RF IN 64/65/72 PRESCALER RF IN NM1 NM2 NM3 FB FB 12 FMOD NF PRESCALER MODULUS CONTROL FRACTIONAL ACCUMULATOR MAIN DIVIDERS RF RN CN TEST EM NORMAL OUTPUT CHARGE PUMP MAIN PHASE DETECTOR NR EM+EA PHP CL SM SPEED-UP OUTPUT CHARGE PUMP MAIN REFERENCE SELECT 12 CK REF IN REFERENCE DIVIDER +2 +2 INTEGRAL OUTPUT CHARGE PUMP +2 PHI SA RA SECONDARY REFERENCE SELECT PA EA AUX IN NA EA AUXILIARY PHASE DETECTOR AUXILIARY OUTPUT CHARGE PUMP LOCK 12 1/4 PRESCALER PHA AUXILIARY DIVIDER VDDA VSSA Figure 4-2 U801 SYNTHESIZER BLOCK DIAGRAM 4-4 Part No. 001-3474-002 CIRCUIT DESCRIPTION 4.2.2 VOLTAGE-CONTROLLED OSCILLATOR Oscillator (Q850) The VCO is formed by Q850, several capacitors and varactor diodes, and a ceramic resonator. It oscillates at the transmit frequency in transmit mode and first injection frequency in the receive mode (approximately 450 MHz in transmit and 500 MHz in receive). Biasing of Q850 is provided by R862, R867 and R868. An AC voltage divider formed by C859, C861 and C862 initiates and maintains oscillation and also matches Q850 to the tank circuit. The ceramic resonator is grounded at one end to provide shunt inductance to the tank circuit. Frequency Control and Modulation The VCO frequency is controlled in part by DC voltage across varactor diodes CR854, CR855, CR856 and CR851. As voltage across a reverse-biased varactor diode increases, its capacitance decreases. Therefore, VCO frequency increases as the control voltage increases. CR854/CR855 and CR856/CR851 are paralleled varactor to divide the capacitance and improve linearity. The varactors are biased at -2V to adjust to the voltage output of U801. The control line is isolated from tank circuit RF by choke L851 and L854 and decoupling capacitor C854. The amount of frequency change produced by CR854/CR855/CR856/CR851 is controlled by series capacitor C853. The -2V applied to the VCO is derived from the TCXO frequency that is amplified by Q833, rectified by CR831 and filtered by C844, C845, C846 and C847 on the RF board. The VCO frequency is modulated using a similar method. The transmit audio/data signal is applied across varactor diode CR852 which varies the VCO frequency at an audio rate. Series capacitors C856/C870 set the amount of deviation produced along with CR853 and C858. R854 provides a DC ground on the anodes of CR852/ CR853, and isolation is provided by R852 and C855. The DC voltage across CR853 provides compensation to keep modulation relatively flat over the entire bandwidth of the VCO. This compensation is required because modulation tends to increase as the VCO frequency gets higher (capacitance of CR854/CR855/CR856/CR851 gets lower). CR853 also balances the modulation signals applied to the VCO and TCXO. An external voltage from J201, pin 14 can also adjust the modulation. The DC voltage applied across CR853 comes from the modulation adjust control R810. R811 applies a DC biasing voltage to CR852; C814 provides DC blocking; and C818 attenuates AC signals applied through R811. RF isolation is provided by C858, R853, C817 and R812. 4-5 Part No. 001-3474-002 CIRCUIT DESCRIPTION 4.2.3 VCO AND REFERENCE OSCILLATOR MODULATION Both the VCO and reference oscillator (TCXO) are modulated in order to achieve the required frequency response. If only the VCO was modulated, the phase detector in U801 would sense the frequency change and increase or decrease the VCO control voltage to counteract the change (especially at the lower audio frequencies). If only the reference oscillator frequency is modulated, the VCO frequency would not change fast enough (especially at the higher audio frequencies). Modulating both VCO and reference oscillators produces a flat audio response. Potentiometer R810 sets the VCO modulation sensitivity so that it is equal to the reference oscillator modulation sensitivity. 4.2.4 CASCODE AMPLIFIERS (Q851/Q852) The output signal on the collector of Q850 is coupled by L861/C864 to buffer amplifier Q851/Q852. This is a shared-bias amplifier which provides amplification and also isolation between the VCO and the stages which follow. The signal is direct coupled from the collector of Q852 to the emitter of Q851. The resistors in this circuit provide biasing and stabilization, and C865 and C866 are bypass capacitors. 4.2.5 AMPLIFIER (Q853) Amplifier Q853 provides amplification and isolation between the VCO and receiver and transmitter. C868 provides matching between the amplifiers. Bias for Q853 is provided by R871, R872 and R874. Inductor L856 and capacitor C873 provide impedance matching on the output. 4.2.6 VOLTAGE FILTER (Q832) Q832 is a capacitance multiplier to provide filtering of the 4.6V supply to the VCO. R836 provides transistor bias and C834 provides the capacitance that is multiplied. If a noise pulse or other voltage change appears on the collector, the base voltage does not change significantly because of C834. Therefore, base current does not change and transistor current remains constant. CR832 decreases the charge time of C834 when power is turned on. This shortens the start-up time of the VCO. C841, C840 and C855 are RF decoupling capacitors. 4.2.7 VCO FREQUENCY SHIFT (Q831) The VCO must be capable of producing frequencies from approximately 403-564.95 MHz to produce the required receive injection and transmit frequencies. If this large of a shift was achieved by varying the VCO control voltage, the VCO gain would be undesirably high. Therefore, capacitance is switched in and out of the tank circuit to provide a coarse shift in frequency. This switching is controlled by the T/R pin shift on J201, pin 4, Q831/Q834 and pin diode CR850. When a pin diode is forward biased, it presents a vary low impedance to RF; and when it is reverse biased, it presents a very high impedance. The capacitive leg is switched in when in transmit and out when in receive. 4-6 Part No. 001-3474-002 CIRCUIT DESCRIPTION When J201, pin 4 is high in receive, Q834 is turned off, Q101 is turned on and the collector voltage goes low. A low on the base of Q102 turns the transistor on and the regulated +5.5V on the emitter is on the collector for the receive circuitry. With a low on the base of Q831 the transistor is off and the collector is high. With a high on the collector of Q831 and a low on the emitter of Q834, this reverse biases CR850 for a high impedance. The capacitive leg is formed by C851, CR850, C852 and C876. When J201, pin 4 is low in transmit, Q834 is turned on and a high is on the emitter, Q101 is turned off and the collector voltage goes high. A high on the base of Q102 turns the transistor off and the regulated +5.5V is removed from the receive circuitry. With a high on the base of Q831 the transistor is on and the collector is low. With a low on the collector of Q831 and a high on the emitter of Q834, this forward biases CR850 and provides an RF ground through C851 and C852/C876 are effectively connected to the tank circuit. This decreases the resonant frequency of the tank circuit. 4.2.8 SYNTHESIZER INTEGRATED CIRCUIT (U801) Introduction Synthesizer chip U801 is shown in Figure 4-2. This device contains the following circuits: R (reference), Fractional-N, NM1 and NM2; phase and lock detectors, prescaler and counter programming circuitry. The basic operation was described in Section 4.2.1. Channel Programming Frequencies are selected by programming the R, Fractional-N, NM1 and NM2 in U801 to divide by a certain number. These counters are programmed by a user supplied programming circuit. More information on programming is located in Section . As previously stated, the counter divide numbers are chosen so that when the VCO is oscillating on the correct frequency, the VCO-derived input to the phase detector is the same frequency as the reference oscillatorderived frequency. The VCO frequency is divided by the internal prescaler and the main divider to produce the input to the phase detector. 4.2.9 LOCK DETECT When the synthesizer is locked on frequency, the SYNTH LOCK output of U801, pin 18 (J201, pin 7) is a high voltage. Then when the synthesizer is unlocked, the output is a low voltage. Lock is defined as a phase difference of less than 1 cycle of the TCXO. 4-7 Part No. 001-3474-002 CIRCUIT DESCRIPTION 4.3 RECEIVER CIRCUIT DESCRIPTION 4.3.1 HELICAL FILTER (Z201), RF AMPLIFIER (Q201) Capacitor C201 couples the receive signal from the antenna switch to helical filter Z201. (The antenna switch is described in Section 4.4.5.) Z201 is a bandpass filter tuned to pass only a narrow band of frequencies to the receiver. This attenuates the image and other unwanted frequencies. The helicals are factory set and should not be tuned. Impedance matching between the helical filter and RF amplifier Q201 is provided by C203, C204 and L201. Q201 amplifies the receive signal to recover filter losses and also to increase receiver sensitivity. Biasing for Q201 is provided by R201, R202 and R203; and C208/C209 provide RF bypass. CR201 protects the base-emitter junction of Q201 from excessive negative voltages that may occur during high signal conditions. Additional filtering of the receive signal is provided by Z202. L202, and C205 provide impedance matching between Q201 and Z202. Resistor R204 is used to lower the Q of L202 to make it less frequency selective. 4.3.2 MIXER (U221), FIRST LO AMPLIFIER (Q301) First mixer U221 mixes the receive frequency with the first injection frequency to produce the 52.95 MHz first IF. Since high-side injection is used, the injection frequency is 52.95 MHz above the receive frequency. The RF signal is coupled to the mixer through C206. The first injection frequency from the VCO is coupled to the first local oscillator amplifier Q301 through C301. L301 and C302 match Q301 to the VCO. Bias for Q301 is provided by R301, R302 and R303, and C303 decouples RF signals. Impedance matching to the mixer is provided by L302, R304 and C304. 4.3.3 AMPLIFIER (Q222), CRYSTAL FILTER (Z221/Z222), IF AMP (Q221) The output of U221 is coupled to buffer Q222. C222, R229 and Q222 match the 50 ohm output of U221. Bias for Q222 is provided by R228 and R229. The output of Q222 is matched to crystal filter Z221 via L222, C223 and R230. This filter presents a low impedance to 52.95 MHz and attenuates the receive, injection, and other frequencies outside the 52.95 MHz passband. Z221 and Z222 form a 2-section, 4-pole crystal filter with a center frequency of 52.95 MHz and a -3 dB passband of 8 kHz (12.5 kHz BW) or 15 kHz (20/25 kHz BW). This filter establishes the receiver selectivity by attenuating the adjacent channel and other signals close to the receive frequency. C232, C224, and L223 adjust the coupling of the filter. L224, C225 and C227 provide impedance matching between the filter and Q221. IF amplifier Q221 amplifies the 52.95 MHz IF signal to recover filter losses and improves receiver sensitivity. Biasing for Q221 is provided by R222, R223, R225 and R226 and C228, C229 decouple RF signals. The output of Q221 is coupled to the detector by C230. 4-8 Part No. 001-3474-002 CIRCUIT DESCRIPTION 4.3.4 SECOND LO AMP/TRIPLER (Q401), SECOND IF FILTER (Q901) The input frequency to Q401 is 17.5 MHz from TCXO Y801 coupled through C402. Bias for Q401 is provided by R401, R402, R403 and R404. C403, C404 decouple RF from the amplifier. L401, L402, C405, C406 and C407 pass the third harmonic of the input (52.5 MHz) to U241, pin 1. The output of the amplifier is coupled to U241, pin 1 by C241, and C410 and L404 provided low frequency decoupling. 4.3.5 SECOND MIXER/DETECTOR (U241) Oscillator and Mixer As shown in Figure 4-3, U241 contains the second oscillator, second mixer, limiter, detector, and squelch circuitry. The 52.95 MHz IF signal is mixed with a 52.5 MHz signal produced by second LO amplifier Q401 from TCXO Y801. C241 52.5 MHz C410 OSCILLATOR MIXER L404 5.5V CONT Z241 Z242 16 15 14 13 12 11 10 C242 C243 LIMITER AMP DEMODULATOR AF AMP L242 Figure 4-3 U241 BLOCK DIAGRAM 4-9 Part No. 001-3474-002 MIXER IN NC RSSI NC AUDIO OUT CIRCUIT DESCRIPTION Second IF Filter The output of the internal double-balanced mixer is the difference between 52.95 MHz and 52.5 MHz which is 450 kHz. This 450 kHz signal is fed out on pin 3 and applied to second IF filters Z241 and Z242. These filters have passbands of 9 kHz (12.5 kHz BW), 15 kHz (20 kHz BW) or 20 kHz (25 kHz BW) at the -6 dB points and are used to attenuate wideband noise. Limiter-Amplifier The output of Z241/Z242 is applied to a limiter-amplifier circuit in U241. This circuit amplifies the 450 kHz signal and any noise present; then limits this signal to a specific value. When the 450 kHz signal level is high, noise pulses tend to get clipped off by the limiter; however, when the 450 kHz signal level is low, the noise passes through. C242, C243 decouple the 450 kHz signal. Quadrature Detector From the limiter stage the signal is fed to the quadrature detector. An external phase-shift network connected to pin 8 shifts the phase of one of the detector inputs 90° at 450 kHz (all other inputs are unshifted in phase). When modulation occurs, the frequency of the IF signal changes at an audio rate as does the phase of the shifted input. The detector, which has no output with a 90° phase shift, converts this phase shift into an audio signal. L242 is tuned to provide maximum undistorted output from the detector. R242 is used to lower the Q of L242. From the detector the audio and data signal is fed out on pin 9. Audio/Data Amplifier The audio/data output of U241 on pin 9 is fed to the audio amplifier U261. U261 amplifies the detected audio/data signal and shifts the DC bias level to 2.5V. The gain is set at approximately 1.5 by R261/R262. R263 and R264 provide a 1.9V DC reference bias voltage. The audio output of U261 is applied to J201, pin 13. Receive Signal Strength Indicator (RSSI) U241, pin 13 is an output for the RSSI circuit which provides a current proportional to the strength of the 450 kHz IF signal. The voltage developed across R241 is applied to J201, pin 12. 4.4 TRANSMITTER CIRCUIT DESCRIPTION 4.4.1 BUFFER (Q851) The output signal is applied to a 50-ohm pad formed by R851, R852, and R853. This pad provides attenuation and isolation. Q851 provides amplification and also additional isolation between the VCO and transmitter. Biasing for this stage is provided by R854, and decoupling of RF signals is provided by C852. Impedance matching with the transmitter is provided by L501 and C502. 4-10 Part No. 001-3474-002 CIRCUIT DESCRIPTION 4.4.2 PRE-DRIVER (Q501), DRIVER (Q521) Pre-driver Q501 is biased class A by R501 and R502 and R506. L501 and C502 match Q501 to Q851. C520 and C508 bypass RF from the DC line, and R503 provides supply voltage isolation. R507 ties the +7.5V supply to the circuit for high power applications and R508 ties the circuit to +5V for low power applications. Impedance matching between Q501 and Q521 is provided by L502, L503 and C511. R504 and C504 provide negative feedback to prevent oscillation. Driver Q521 is biased nearly Class C by R521 and R522. Impedance matching with Q541 is provided by L521, C525, C527, L522 and C526. 4.4.3 -5V POWER CONTROL SUPPLY The 17.5 MHz from the TCXO is coupled through C902 to Q901. Bias for Q901 is provided by R903, R904, R901, R902 and R905. C901 and C903 provide RF decoupling. The amplified signal rectified by CR901/CR902 to produce a -5V DC source. C909 stabilizes the voltage level and C910 and C911 provide RF decoupling. This -5V source is used in the transmit power control circuit U542. 4.4.4 FINAL (Q541), POWER CONTROL (U542) Q541 is biased for Class C operation. The output is matched to the low-pass filter by L541, C552, and several capacitors. The supply voltage is isolated from RF by ferrite bead EP541. Power control is provided by U542. The 5.5V transmit supply is passed by U542 to power adjust R542. The other end of R542 is the rectified -5V from Q901. This negative voltage is required when low power is used to pinch off Q541 to the required output. The low-pass filter consists of L561, C561, L562, C562, L563, C563 and L564. The filter attenuates spurious frequencies occurring above the transmit frequency band. The transmit signal is then fed through the antenna switch to antenna jack J501. 4.4.5 ANTENNA SWITCH (CR561, CR562) The antenna switching circuit switches the antenna to the receiver in the receive mode and the transmitter in the transmit mode. In the transmit mode, +7.5V is applied to L565 and current flows through diode CR561, L566, diode CR562, and R562/R563. When a diode is forward biased, it presents a low impedance to the RF signal; conversely, when it is reverse biased (or not conducting), it presents a high impedance (small capacitance). Therefore, when CR561 is forward biased, the transmit signal has a low-impedance path to the antenna through coupling capacitor C568. 4-11 Part No. 001-3474-002 CIRCUIT DESCRIPTION C567, L566, and C570 form a discrete quarter- wave line. When CR561 is forward biased, this quarter-wave line is effectively AC grounded on one end by C570. When a quarter-wave line is grounded on one end, the other end presents a high impedance to the quarter-wave frequency. This blocks the transmit signal from the receiver. C569 matches the antenna to 50 ohms in transmit and receive. In the receive mode, no power is applied to L565, so all the diodes are “off”. The receive signal then has a high-impedance path into the transmitter and a low-impedance path into the receiver because the quarter-wave line is not grounded. 4-12 Part No. 001-3474-002 SECTION 5 SERVICING 5.1 GENERAL 5.1.1 PERIODIC CHECKS This transceiver should be put on a regular maintenance schedule and an accurate performance record maintained. Important checks are receiver sensitivity and transmitter frequency, modulation, and power output. A procedure for these and other tests is located in Section 6. It is recommended that transceiver performance be checked annually even though periodic checks are not required by the FCC. During the first year, make an additional check or two to ensure no TCXO frequency drifting has occurred. 5.1.2 SURFACE-MOUNTED COMPONENTS A large number of the components used on the transceiver board are the surface-mounted type. Since these components are relatively small in size and are soldered directly to the PC board, care must be used when they are replaced to prevent damage to the component or PC board. Surface-mounted components should not be reused because they may be damaged by the unsoldering process. 5.1.3 SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS Schematic diagrams and component layouts of the PC boards used in this transceiver are located in Section 8. A component locator guide is also provided to aid in component location. 5.1.4 REPLACEMENT PARTS LIST A replacement parts list with all the parts used in this transceiver is located in Section 7. Parts are listed alphanumerically according to designator. For information on ordering parts, refer to Section 1.8. 5.1.5 TCXO MODULE NOT SERVICEABLE The ±1.5 PPM TCXO module is not field serviceable. Part changes require a factory recalibration to ensure that the oscillator stays within its ±1.5 PPM tolerance. 5.2 SYNTHESIZER SERVICING 5.2.1 INTRODUCTION When there is a synthesizer malfunction, the VCO is not locked on frequency. When an unlocked VCO is detected by the lock detector circuit, U801, pin 18 goes low (0V). 5-1 Part No. 001-3474-002 SERVICING NOTE: The user-supplied circuitry must disable the transmitter and receiver when an out-of-lock condition is indicated. When the VCO is unlocked, the fR and fV inputs to the phase detector are usually not in phase (see Section 4.1.2). The phase detector in U801 then causes the VCO control voltage to go to the high or low end of its operating range. This in turn causes the VCO to oscillate at the high or low end of its frequency range. As shown in Figure 4-1, a loop is formed by VCO Q850, amplifier Q851/Q852, and the RF IN of U801. Therefore, if any of these components begin to malfunction, improper signals appear throughout the loop. However, correct operation of the counters can still be verified by measuring the input and output frequencies to check the divide number. Proceed as follows to check the synthesizer I/O signals to determine if it is operating properly. 5.2.2 REFERENCE OSCILLATOR Check the signal at U801, pin 8. It should be 17.5 MHz at a level of approximately 1.5V P-P. If the TCXO module is defective, it is not serviceable and must be replaced with a new module as described in Section 5.1.5. 5.2.3 VCO Output Level The output level of Q853 can be measured with an RF voltmeter or some other type of high impedance meter. The minimum level after a power splitter at R851 should be -10 dBm. Control Voltage Check the DC voltage at C815 with a channel near the center of the band. If the VCO is locked on frequency, this should be a steady DC voltage near 3V. If it is not locked on frequency, it should be near the lower or upper end of its range (0V or 5.5V). Output Frequency Check the VCO frequency at R851. If the VCO is locked on frequency, it should be stable on the transmit channel frequency. If the VCO is not locked on frequency, the VCO control voltage is probably near 0V or 5.5V. 5.2.4 SYNTHESIZER (U801) Lock Detector When the VCO is locked on frequency, the lock detect output on J201, pin 7 should be high. 5-2 Part No. 001-3474-002 SERVICING 5.3 RECEIVER SERVICING To isolate a receiver problem to a specific section, refer to the troubleshooting flowchart in Figure 5-1. Tests referenced in the flowchart are described in the following information. NOTE: Supply voltages are provided by the user. 5.3.1 SUPPLY VOLTAGES AND CURRENT Measure the supply voltages on the following pins at interface connector J201: Pin 4 - 5.0V DC Receive Pin 5 - 5.0V DC Place a DC ammeter in the supply line to the transceiver and the following maximum currents should be measured: Pin 4 - 10 mA Pin 5 - 50 mA 5.3.2 MIXER/DETECTOR (U201) Data Output Using a .01 µF coupling capacitor, inject at U241, pin 16, a 52.95 MHz, 1 mV signal, modulated with 1 kHz at ± 3 kHz deviation. The audio output level at U241, pin 9 should be approximately 400 mV RMS. The data output on J201, pin 13 should be 600 mV to 1.2V P-P or 212 mV to 424 mV RMS with the preceding injection signal. RSSI Output The RSSI output on J201, pin 12 should be greater than 100 mV at 12 dB SINAD and less than 2.5V with 1 mV input. If either of the preceding measurements is not correct, there may be a problem with U241. 5-3 Part No. 001-3474-002 SERVICING Figure 5-1 RECEIVER SERVICING FLOWCHART 5.3.3 RF AMPLIFIER (Q201) AND FIRST MIXER (Q221) Refer to the schematic diagram for signal levels and test points for measuring levels. 5.3.4 RF AND IF AMPLIFIERS, FIRST MIXER Check the DC voltages shown on the schematic diagram. If they are normal, inject a signal at the input and output of each stage using a .01 µF coupling capacitor. If the stage is producing gain, the injection level on the input of a stage should be less than that required on the output to produce the same SINAD at the receive output. 5.4 TRANSMITTER SERVICING 5.4.1 SUPPLY VOLTAGES AND CURRENT Measure the supply voltages on the following pins of interface connector J201: 5-4 Part No. 001-3474-002 SERVICING Pin 2 - 7.5V DC Pin 3 - 7.5V DC Pin 4 - 0.0V DC (while transmitting) Pin 5 - 5.0V DC Pin 6 - 2.5V DC Transmit In/1.5V P-P max Place a DC ammeter in the supply line to the transceiver and the following maximum currents should be measured: Pin 2 - 650 mA Pin 3 - 250 mA Pin 5 - 12 mA Figure 5-2 TRANSMITTER SERVICING FLOWCHART 5-5 Part No. 001-3474-002 SERVICING This page intentionally left blank. 5-6 Part No. 001-3474-002 SECTION 6 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS 6.1 GENERAL Receiver or transmitter alignment may be necessary if repairs are made that could affect tuning. Alignment points diagrams are located in Figure 6-3 or component layouts are located in Section 8. Fabricate test cables by referring to Section 2.2, Interfacing with Data Equipment. This cable should include power and ground, a transmit keying switch that shorts the keying line to ground, data input and data output. The test setup must apply the various supply voltages and load the synthesizer with channel information. 6.2 DL3474 TRANSCEIVER ONLY 6.2.1 FREQUENCY AND CONTROL LINE VOLTAGE CHECK 1. Connect the test setup shown in Figure 6-1. Set the power supply for +7.5V DC. 2. Load the synthesizer with the channel frequency (see Section 3.2). 3. Connect a DC voltmeter at the junction of R808/C815 to measure the VCO control line voltage for a meter reading of ≥0.50 - ≤4.90V DC (see Figure 6-3). 4. Key the transmitter. 5. Measure the VCO control line voltage for a meter reading of ≥0.75 - ≤5.00V DC 6. Unkey the transmitter. 6.2.2 2W TRANSMITTER POWER ALIGNMENT 1. Connect the test setup shown in Figure 6-1. A DC ammeter capable of measuring up to 1.5A should be installed in the supply line. 2. Load the synthesizer with the center channel frequency. 3. Key the transmitter and make sure that the supply voltage at the RF board is 7.5V. (Do not transmit for extended periods.) 4. Adjust C553 counterclockwise for minimum current. 5. Connect a voltmeter to the junction of R542/R543. 6-1 Part No. 001-3474-002 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS 6. Adjust R542 clockwise for 2.30V DC (+0/-0.1V DC). 7. Readjust C553 counterclockwise for minimum current. 8. Tune C527 clockwise for maximum power. 9. Tune C553 clockwise for 2.0W (±0.1W). Current should be less than 900 mA. (Power output should be 1.6-2.4W and current less than 900 mA from 403-512 MHz.) 10. Monitor the frequency with a frequency counter and adjust TCXO (Y801) for the channel frequency ±100 Hz. Figure 6-1 TRANSMITTER TEST SETUP 6.2.3 LOW POWER ALIGNMENT 1. Connect the test setup shown in Figure 6-1. 2. Load the synthesizer with the center channel frequency. 3. Connect a voltmeter to the junction of R542/R543. 4. Adjust R542 clockwise for -1.5V DC (±0.1V DC). 5. Tune C527 clockwise for maximum power. 6-2 Part No. 001-3474-002 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS 6. Tune C553 clockwise for minimum power. 7. Adjust R542 for the required power level. 8. Tune C527 for power balance at frequencies which are as close as possible to ±5 MHz from the center of the channel frequency. 9. Re-adjust R542 for the power level required if necessary. 10. Monitor the frequency with a frequency counter and adjust TCXO (Y801) for the channel frequency ±100 Hz. 6.2.4 MODULATION FLATNESS ALIGNMENT 1. Inject a 220 Hz square-wave tone at approximately 0.35V P-P, biased at 2.5V DC on J201, pin 6. 2. Transmit into the modulation analyzer and observe modulation output on the oscilloscope. Set the modulation analyzer high pass filtering off and no less than a 15 kHz low pass filter. 3. Adjust R810 for a flat square-wave on the oscilloscope. 4. Inject a 1 kHz sine-wave on J201, pin 6, biased at 2.5V DC, at the level below according to the bandwidth: 0.200V RMS for 12.5 kHz BW (-X10 Radios) 0.330V RMS for 20.0 kHz BW (-X20 Radios) 0.400V RMS for 25.0 kHz BW (-X30 Radios) 5. Switch on TX Modulation. Set the modulation analyzer for 3 kHz low pass filtering. 6. The transmit deviation should measure between: ±1.2/±1.9 kHz for 12.5 kHz BW (-X10 Radios) ±1.9/±3.0 kHz for 20.0 kHz BW (-X20 Radios) ±2.4/±3.8 kHz for 25.0 kHz BW (-X30 Radios) 7. Set a 0 dB reference on the Audio Analyzer. 8. Input a 100 Hz sine-wave. The level should be within ±1.5 dB of the 1 kHz reference. 9. Remove transmit modulation and unkey the transmitter. 10.Connect a DC voltmeter at the junction of R807/R855. 11. Adjust R855 to 2.10V DC (±0.05V DC). 6-3 Part No. 001-3474-002 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS Figure 6-2 RECEIVER TEST SETUP 6.2.5 RECEIVER ALIGNMENT C A U T I O N: Do not key the transmitter with the generator connected! Severe generator damage may result. 1. Connect the test setup shown in Figure 6-2. Adjust the power supply for +7.5V DC. 2. Measure the receive current drain. (Typically current should be <80 mA.) 3. Preset tuning slugs of L222/L224 to the full clockwise position (slug in all the way). 4. Preset C232 to center position (slot in-line with axis of part). 5. Readjust L224 counterclockwise 2 turns. 6.2.6 IF AND AUDIO ADJUSTMENTS 1. Load the synthesizer with the channel frequency. 2. Set the RF signal generator for this frequency with a 1 kHz tone (modulated output shown below) at a level of -47 dBm (1000 µV) and inject into J501. 1.5 kHz deviation (-X10 12.5 kHz BW Radio) 2.4 kHz deviation (-X20 20.0 kHz BW Radio) 3.0 kHz deviation (-X30 25.0 kHz BW Radio) 6-4 Part No. 001-3474-002 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS NOTE: Maintain these deviation levels throughout the test when measuring AC levels, SINAD and % distortion. 3. Adjust L242 for 2.5V DC (±0.05V DC) at the receive audio output. 4. Set the RF signal generator level to -105 dBm, “unmodulated”. 5. Set the generator frequency 3 kHz below channel center (-X10) or 5 kHz below channel center (-X20/-X30). 6. Adjust C232, then L222 for peak RSSI voltage. NOTE: Use 2V scale on DVM. 7. Set the RF signal generator frequency back to channel center at -47 dBm with standard deviation level. 8. Adjust L224 for minimum distortion. 9. Set the RF signal generator to -105 dBm, “unmodulated”. 10.Adjust L222 for peak RSSI voltage. NOTE: Use 2V scale on DVM. 11 Adjust deviation to the level in Step 2. Record the RMS voltage level _______RMS. (Typically 300 mV ±50 mV.) 12.Record the percent distortion _______%. (Typically <3%.) 13.Adjust the RF input level until 12 dB SINAD is measured. (Typically <0.45 µV). 14. Adjust the generator RF level to -120 dBm and measure DC (RSSI) voltage on J201, pin 12. (Typically ≤ 0.90V DC.) 15.Adjust the generator RF level to -60 dBm and measure DC (RSSI) voltage on J201, pin 12. (Typically ≥ 2.40V DC.) 6-5 Part No. 001-3474-002 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS R509 Figure 6-3 ALIGNMENT POINTS DIAGRAM 6-6 Part No. 001-3474-002 SECTION 7 PARTS LIST . 023-3474-515 SYMBOL NUMBER 801 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 131 132 133 134 135 201 203 204 205 207 208 211 222 223 224 225 226 227 228 DESCRIPTION PART NUMBER FINISHED 450-466 VCO(M9 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 1.0UFD 16V SMD TANT RL 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 1.0UFD 16V SMD TANT RL 68pF 5% NPO 0603 68pF 5% NPO 0603 1.0UFD 16V SMD TANT RL 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 1.0UFD 16V SMD TANT RL 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 10pF +/-.1pF NPO 0603 4.7pF +/-.1pF NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 3.9pf +/-.1pF NPO 0603 3.0pf +/-.1pF NPO 0603 .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 8.2pF +/-.1pF NPO 0603 .01MF X7R K 0603 CHPR 023-3474-540 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-2625-109 610-3674-680 610-3675-103 610-2625-109 610-3674-680 610-3674-680 610-2625-109 610-3674-680 610-3675-103 610-2625-109 610-3674-680 610-3674-680 610-3674-680 610-3673-100 610-3673-479 610-3674-680 610-3674-680 610-3674-680 610-3675-103 610-3673-399 610-3673-309 610-3675-103 610-3675-103 610-3673-829 610-3675-103 7-1 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER 229 230 232 235 241 242 243 245 246 247 248 261 262 263 265 301 302 303 304 306 309 310 401 402 403 404 405 406 407 410 501 502 503 504 505 506 507 508 509 510 511 520 521 522 523 524 525 526 527 528 DESCRIPTION PART NUMBER .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 1.5-5PF SMD CERAMIC .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR .1UFD X7R J 1206 RL .1UFD X7R J 1206 RL .01MF X7R K 0603 CHPR 1.0UFD 16V SMD TANT RL .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 27pF 5% NPO 0603 68pF 5% NPO 0603 .1UFD X7R J 1206 RL .1UFD X7R J 1206 RL 68pF 5% NPO 0603 8.2pF +/-.1pF NPO 0603 68pF 5% NPO 0603 3.3pF +/-.1pF NPO 0603 68pF 5% NPO 0603 1.0UFD 16V SMD TANT RL 3.3pF +/-.1pF NPO 0603 .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 82pF 5% NPO 0603 6.8pF +/-.1pF NPO 0603 82pF 5% NPO 0603 .1UFD X7R J 1206 RL 68pF 5% NPO 0603 6.8pF +/-.1pF NPO 0603 68pF 5% NPO 0603 470pF 5% NPO 0603 .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 120pF 5% NPO 0603 3.9pf +/-.1pF NPO 0603 22pF 5% NPO 0603 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 470pF 5% NPO 0603 27pF 5% NPO 0603 18PF NPO J 0805 CHP RL (L 2.5-10PF SMD CERAMIC 10pF +/-.1pF NPO 0603 610-3675-103 610-3675-103 612-1602-001 610-3675-103 610-3675-103 610-3609-104 610-3609-104 610-3675-103 610-2625-109 610-3675-103 610-3675-103 610-3674-270 610-3674-680 610-3609-104 610-3609-104 610-3674-680 610-3673-829 610-3674-680 610-3673-339 610-3674-680 610-2625-109 610-3673-339 610-3675-103 610-3675-103 610-3675-103 610-3675-103 610-3674-820 610-3673-689 610-3674-820 610-3609-104 610-3674-680 610-3673-689 610-3674-680 610-3674-471 610-3675-103 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-121 610-3673-399 610-3674-220 610-3674-680 610-3675-103 610-3674-680 610-3674-471 610-3674-270 610-3601-180 612-1602-002 610-3673-100 7-2 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER 541 542 546 547 548 549 550 551 552 553 554 555 560 561 562 563 564 565 567 568 569 570 571 572 573 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 817 818 819 831 832 833 834 835 836 837 DESCRIPTION PART NUMBER 68pF 5% NPO 0603 470pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 1.0UFD 16V SMD TANT RL .01MF X7R K 0603 CHPR 33PF NPO J 0805 CHP RL (L 15PF NPO J 0805CHP RL (L0 3.9PF NPO J 0805CHP RL 2.5-10PF SMD CERAMIC 68pF 5% NPO 0603 33pF 5% NPO 0603 22pF 5% NPO 0603 5.6PF NPO J 0805CHP RL (L 6.2PF NPO J0805 CHP RL 7.5PF NPO J0805 CHP RL .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 5.6PF NPO J 0805CHP RL (L 47pF 5% NPO 0603 5.1PF NPO J0805 CHP RL 33pF 5% NPO 0603 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 1.0UFD 16V SMD TANT RL .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 3.3pF +/-.1pF NPO 0603 .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 100PF NPO J 0805CHP RL (L .1UFD X7R J 1206 RL .001uF 10% X7R 0603 .0047UF X7R K 0805 C/R (L .001uF 10% X7R 0603 1.0UFD 16V SMD TANT RL .0047UF X7R K 0805 C/R (L 68pF 5% NPO 0603 1.0UFD 16V SMD TANT RL 3.9pf +/-.1pF NPO 0603 .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 4.7UFD 10V SMD TANT RL .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 610-3674-680 610-3674-471 610-3674-680 610-3674-680 610-2625-109 610-3675-103 610-3601-330 610-3601-150 610-3601-399 612-1602-002 610-3674-680 610-3674-330 610-3674-220 610-3601-569 610-3601-629 610-3601-759 610-3675-103 610-3674-680 610-3601-569 610-3674-470 610-3601-519 610-3674-330 610-3674-680 610-3675-103 610-2625-109 610-3675-103 610-3675-103 610-3675-103 610-3673-339 610-3675-103 610-3674-680 610-3675-103 610-3674-680 610-3601-101 610-3609-104 610-3675-102 610-3605-472 610-3675-102 610-2625-109 610-3605-472 610-3674-680 610-2625-109 610-3673-399 610-3675-103 610-3675-103 610-3674-680 610-2624-479 610-3675-103 610-3675-103 610-3675-103 7-3 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER DESCRIPTION PART NUMBER C 838 C 839 C 840 C 841 C 842 C 844 C 845 C 846 C 847 C 848 C 849 C 850 C 851 C 852 C 855 CR 201 CR 561 CR 562 CR 831 CR 832 EP 200 EP 501 EP 541 J 201 J 501 L 201 L 202 L 222 L 223 L 224 L 242 L 301 L 302 L 401 L 402 L 404 L 501 L 502 L 503 L 521 L 522 L 541 L 561 L 562 L 563 L 564 L 565 L 566 L 801 L 851 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 1.0UFD 16V SMD TANT RL .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 .01MF X7R K 0603 CHPR SWITCHING DIODE SOT-23 SOT PIN SW DIODE T/RL SOT PIN SW DIODE T/RL DUAL SW DIODE SOT23 BB535 SOD 323 VARACTOR MINI CER CRY PIN INSUL FERRITE BEAD SMD FERRITE BEAD SMD 14P SGL ROW RCPT.1CNTR STR TERM PCB INDUCT LL2012 F8.2N 0805 22 NHY0805 SMD 10% INDUCT 1+/-6%UH VAR. IND. 5MM 0.82 MHY SMD INDUCTOR 1+/-6%UH VAR. IND. 5MM QUAD COIL 68OUH//180PF SM 10 NHY0805 SMD 10% INDUCT INDUCT LL2012 F15N 0805 S .100 UHY SMD INDUCTOR .100 UHY SMD INDUCTOR 1.0 UHY SMD INDUCTOR INDUCT LL2012 F15N 0805 S 1.0 UHY SMD INDUCTOR INDUCT LL2012 F15N 0805 S 10T 43.0nh SMD AIR CORE I INDUCT LL2012 F3N3 0805 S 5T 18.5nh SMD AIR CORE IN 5T 18.5nh SMD AIR CORE IN 9T 35.5nh SMD AIR CORE IN 9T 35.5nh SMD AIR CORE IN 5T 18.5nh SMD AIR CORE IN 1.0 UHY SMD INDUCTOR 12.5nH SM AIR CORE IND (L 39 NHY0805 SMD 10% INDUCT 1.0 UHY SMD INDUCTOR 610-3674-680 610-3675-103 610-3675-103 610-3674-680 610-3675-103 610-2625-109 610-3675-103 610-3674-680 610-3675-103 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3674-680 610-3675-103 623-1504-002 623-1504-001 623-1504-001 623-1504-023 623-5005-022 010-0345-280 617-2503-001 617-2503-001 615-7110-214 615-3013-030 642-9003-826 642-9003-227 642-1012-015 642-9001-828 642-1012-015 642-5102-001 642-9003-107 642-9003-157 642-9001-108 642-9001-108 642-9001-109 642-9003-157 642-9001-109 642-9003-157 642-0030-010 642-9003-336 642-0030-005 642-0030-005 642-0030-009 642-0030-009 642-0030-005 642-9001-109 642-0030-004 642-9003-397 642-9001-109 7-4 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER DESCRIPTION PART NUMBER MP 801 MP 802 MP 803 MP 804 MP 806 PC 001 Q 101 Q 102 Q 103 Q 131 Q 201 Q 221 Q 222 Q 301 Q 401 Q 501 Q 521 Q 541 Q 831 Q 832 Q 833 Q 834 Q 851 R 120 R 131 R 201 R 202 R 203 R 204 R 222 R 223 R 224 R 225 R 226 R 228 R 229 R 230 R 241 R 242 R 243 R 261 R 262 R 263 R 264 R 265 R 267 R 268 R 269 R 270 R 271 CAN-VCO 3474 TOP SHIELD 3474 XMIT SHIELD 3474 BOTTOM XMIT 3474 SHIELD BOTTOM SYNTH XTAL FLTR SHIELD 3472 PCB DL 3474 MAIN (MUL6) NPN TRANS SOT 23 80V DIG TRANS DCT114WK S23 NPN TRANS SOT 23 80V NPN TRANS SOT 23 80V MMBR5031 SOT23NPN XSTR VHF/UHF AMP SOT-23 SOT SI N-CHAN JFET IV (NPN) 85633 SOT23 R25 VHF/UHF AMP SOT-23 IV (NPN) 85633 SOT23 R25 NPN SO8 .2-2GHZ XSTR RF FET TRANS NPN TRANS SOT 23 80V NPN SC70 MSD1819 GEN PURP VHF/UHF AMP SOT-23 DIG TRANS DCT114WK S23 BIPOLAR MMIC, SOT143 100k OHMS J 063W 0603 CHI 100k OHMS J 063W 0603 CHI 47 OHMS J 063W 0603 CHIP 2.7K OHM J 063W 0603 CHIP 750 OHM RES J 063W 0603 C 330 OHMS J 063W 0603 CHIP 330 OHMS J 063W 0603 CHIP 22K OHMS J 063W 0603 CHIP 1K OHM J 063W 0603 CHIP 15k OHMS J 063W 0603 CHIP 470 OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP 330 OHMS J 063W 0603 CHIP 2.7K OHM J 063W 0603 CHIP 62K OHMS J 063W 0603 CHIP 27K OHMS J 063W 0603 CHIP 270 OHMS J 063W 0603 CHIP 200k OHMS J 063W 0603 CHI 100k OHMS J 063W 0603 CHI 10K OHMS J 063W 0603 CHIP 18k OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP 12K OHMSJ 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 017-2225-751 017-2225-761 017-2225-762 017-2225-763 017-2225-699 035-3474-030 676-0003-616 676-0003-621 676-0003-616 676-0003-616 676-0003-606 676-0003-634 676-0006-019 676-0003-636 676-0003-634 676-0003-636 676-0003-604 676-0006-450 676-0003-616 676-0013-701 676-0003-634 676-0003-621 676-0003-640 669-0155-104 669-0155-104 669-0155-470 669-0155-272 669-0155-751 669-0155-331 669-0155-331 669-0155-223 669-0155-102 669-0155-153 669-0155-471 669-0155-100 669-0155-331 669-0155-272 669-0155-623 669-0155-273 669-0155-271 669-0155-204 669-0155-104 669-0155-103 669-0155-183 669-0155-100 669-0155-123 669-0155-103 669-0155-103 669-0155-103 669-0155-103 7-5 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER 301 302 303 304 401 402 403 404 501 502 503 504 506 508 509 521 522 524 541 542 543 546 550 551 562 564 801 802 804 805 806 807 808 810 811 812 813 814 817 831 834 835 836 838 839 840 841 842 844 845 DESCRIPTION PART NUMBER 3.3K OHM J 063W 0603 CHIP 1.8K OHMS J 063W 0603 CHI 180 OHMS J 063W 0603 CHIP 470 OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP 15k OHMS J 063W 0603 CHIP 4.7K OHM J 063W 0603 CHIP 680 OHMS J 063W 0603 CHIP 2.2K OHMS J 063W 0603 CHI 1.8K OHMS J 063W 0603 CHI 10 OHMS J 063W 0603 CHIP 560 OHMS J 063W 0603 CHIP 100 OHMS J 063W 0603 CHIP ZERO OHM J 0805 CHIP/R 470 OHM SMD TRIMMER 1K OHM J 063W 0603 CHIP 150 OHMS J 063W 0603 CHIP 220 OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP 10K OHM SMD TRIMMER 10K OHMS J 063W 0603 CHIP 47 OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP RES 270R 0.75W +/-5% (L07 47K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 10 OHMS J 063W 0603 CHIP 27K OHMS J 063W 0603 CHIP 12K OHMSJ 063W 0603 CHIP 4.7K OHM J 063W 0603 CHIP 18k OHMS J 063W 0603 CHIP 220K OHM SMD TRIMMER 27K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 100k OHMS J 063W 0603 CHI 20 OHM J 063W 0603 CHIP 4.7K OHM J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 10K OHMS J 063W 0603 CHIP 100 OHMS J 063W 0603 CHIP 4.7K OHM J 063W 0603 CHIP 100 OHMS J 063W 0603 CHIP 1K OHM J 063W 0603 CHIP 22K OHMS J 063W 0603 CHIP 15k OHMS J 063W 0603 CHIP 1K OHM J 063W 0603 CHIP 680 OHMS J 063W 0603 CHIP 18 OHMS J 063W 0603 CHIP 669-0155-332 669-0155-182 669-0155-181 669-0155-471 669-0155-100 669-0155-153 669-0155-472 669-0155-681 669-0155-222 669-0155-182 669-0155-100 669-0155-561 669-0155-101 669-0105-001 662-0130-471 669-0155-102 669-0155-151 669-0155-221 669-0155-100 662-0130-103 669-0155-103 669-0155-470 669-0155-100 669-0155-100 669-0135-271 669-0155-473 669-0155-103 669-0155-103 669-0155-100 669-0155-273 669-0155-123 669-0155-472 669-0155-183 662-0130-224 669-0155-273 669-0155-103 669-0155-104 669-0155-200 669-0155-472 669-0155-103 669-0155-103 669-0155-101 669-0155-472 669-0155-101 669-0155-102 669-0155-223 669-0155-153 669-0155-102 669-0155-681 669-0155-180 7-6 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER DESCRIPTION PART NUMBER R 846 R 847 R 848 R 851 R 852 R 853 R 854 R 855 R 856 R 857 R 858 R 860 RE 000 RE 000 RE 000 RM 000 U 101 U 131 U 221 U 241 U 261 U 801 Y 801 Z 201 Z 202 Z 221 Z 241 Z 242 18 OHMS J 063W 0603 CHIP 18 OHMS J 063W 0603 CHIP 1.5K OHM J 063W 0603 CHIP 150 OHMS J 063W 0603 CHIP 39 OHM J 0603 CHIP/R 150 OHMS J 063W 0603 CHIP 82 OHMS 5% 063W 0603 SMD 100K SMD TRIMMER 4.7K OHM J 063W 0603 CHIP 4.7K OHM J 063W 0603 CHIP 4.7K OHM J 063W 0603 CHIP 100 OHMS J 063W 0603 CHIP SCHEMATIC DL 3474 MAIN SCHEMATIC DL 3474 MAIN ASSEMBLY DL 3474 MAIN BD SLDR 62/36/2 H20 CLEAN 5.5V REG 50-6 5.5V REG 50-6 DBL BAL MIXER MOT-1-04 FM IF MC3371D SO-16 MC33172D SO8 OP AMP FRACTIONAL-N SYNTHESIZER 17.5 MHZ TCXO +/-1.5 PPM SMD HEL FLTR 459 MHZ 3 PO SMD HEL FLTR 459 MHZ 3 PO 52.95MHZ 4P 8KHZ BW 450 KHZ, 9 KHZ BW CERAMIC 450 KHZ, 9 KHZ BW CERAMIC 669-0155-180 669-0155-180 669-0155-152 669-0155-151 669-0155-390 669-0155-151 669-0155-820 662-0130-104 669-0155-472 669-0155-472 669-0155-472 669-0155-101 025-3474-030 025-3474-030 027-3474-030 684-1606-062 644-2603-086 644-2603-086 644-0007-014 644-2002-031 644-2019-017 644-3954-027 618-7009-521 632-1005-044 632-1005-044 632-0009-011 632-2004-015 632-2004-015 023-3474-542 68pF 5% NPO 0603 68pF 5% NPO 0603 8.2pF +/-.1pF NPO 0603 9.1pf +/-.1pF NPO 0603 100pF 5% NPO 0603 68pF 5% NPO 0603 2.7pF +/-.1pF NPO 0603 68pF 5% NPO 0603 7.5pF +/-.1pF NPO 0603 8.2pF +/-.1pF NPO 0603 6.8pF +/-.1pF NPO 0603 68pF 5% NPO 0603 10pF +/-.1pF NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 68pF 5% NPO 0603 1.5pF +/-.1pF NPO 0603 1pF +/-.1pF NPO 0603 100pF 5% NPO 0603 610-3674-680 610-3674-680 610-3673-829 610-3673-919 610-3674-101 610-3674-680 610-3673-279 610-3674-680 610-3673-759 610-3673-829 610-3673-689 610-3674-680 610-3673-100 610-3674-680 610-3674-680 610-3674-680 610-3673-159 610-3673-109 610-3674-101 850 851 852 853 854 855 856 858 859 861 862 863 864 865 866 867 868 870 871 7-7 Part No. 001-3474-002 PARTS LIST SYMBOL NUMBER DESCRIPTION PART NUMBER C 873 C 874 C 876 C 877 C 878 CR 850 CR 851 CR 852 CR 853 CR 854 CR 855 CR 856 L 851 L 852 L 853 L 854 L 855 L 856 Q 850 Q 851 Q 852 Q 853 R 851 R 852 R 853 R 854 R 856 R 857 R 858 R 862 R 863 R 864 R 865 R 866 R 867 R 868 R 869 R 870 R 871 R 872 R 874 R 875 RM 000 Z 850 100pF 5% NPO 0603 3.3pF +/-.1pF NPO 0603 8.2pF +/-.1pF NPO 0603 1pF +/-.1pF NPO 0603 10PF NPO J 0805 CHP RL SOT PIN SW DIODE T/RL BB535 SOD 323 VARACTOR VAR DIODE SOD123 BB515 VAR DIODE SOD123 BB515 BB535 SOD 323 VARACTOR BB535 SOD 323 VARACTOR BB535 SOD 323 VARACTOR 150 NHY0805 SMD 10% IN 150 NHY0805 SMD 10% IN 22 NHY0805 SMD 10% IND 150 NHY0805 SMD 10% IN INDUCT LL2012 F56N 080 22 NHY0805 SMD 10% IND NPN TRANS NE85619 SC90 NPN TRANS NE85619 SC90 NPN TRANS NE85619 SC90 NPN TRANS NE85619 SC90 10K OHMS J 063W 0603 C 47K OHMS J 063W 0603 C 47K OHMS J 063W 0603 C 10 OHMS J 063W 0603 CH 10 OHMS J 063W 0603 CH 6.8K OHM J 063W 0603 C 1K OHM J 063W 0603 CHI 10K OHMS J 063W 0603 C 10 OHMS J 063W 0603 CH 10K OHMS J 063W 0603 C 10K OHMS J 063W 0603 C 470 OHMS J 063W 0603 C 12K OHMSJ 063W 0603 CH 390 OHMS J 063W 0603 C 270 OHMS J 063W 0603 C 18 OHMS J 063W 0603 CH 3.9K OHM J 063W 0603 C 1.8K OHMS J 063W 0603 680 OHMS J 063W 0603 C 270 OHMS J 063W 0603 C SLDR 62/36/2 H20 CLEAN 0.5IN LONG SMD RESONAT 610-3674-101 610-3673-339 610-3673-829 610-3673-109 610-3601-100 623-1504-001 623-5005-022 623-5005-020 623-5005-020 623-5005-022 623-5005-022 623-5005-022 642-9003-158 642-9003-158 642-9003-227 642-9003-158 642-9003-567 642-9003-227 676-0003-651 676-0003-651 676-0003-651 676-0003-651 669-0155-103 669-0155-473 669-0155-473 669-0155-100 669-0155-100 669-0155-682 669-0155-102 669-0155-103 669-0155-100 669-0155-103 669-0155-103 669-0155-471 669-0155-123 669-0155-391 669-0155-271 669-0155-180 669-0155-392 669-0155-182 669-0155-681 669-0155-271 684-1606-062 642-9004-005 C 225 C 227 .01MF X7R K 0603 CHPR 8.2pF +/-.1pF NPO 0603 023-3474-511 610-3675-103 610-3673-829 7-8 Part No. 001-3474-002 PARTS LIST EP 200 J 201 J 501 L 222 L 224 MP 801 MP 802 MP 803 MP 804 MP 806 R 230 R 261 RE 000 RE 000 Y 801 Z 221 Z 241 Z 242 MINI CER CRY PIN INSUL 14P SGL ROW RCPT.1CNTR STR TERM PCB 1+/-6%UH VAR. IND. 5MM 1+/-6%UH VAR. IND. 5MM CAN-VCO 3474 TOP SHIELD 3474 XMIT SHIELD 3474 BOTTOM XMIT 3474 SHIELD BOTTOM SYNTH XTAL FLTR SHIELD 3472 2.7K OHM J 063W 0603 CHIP 200k OHMS J 063W 0603 CHI SCHEMATIC DL 3474 MAIN ASSEMBLY DL 3474 MAIN BD 17.5 MHZ TCXO +/-1.5 PPM 52.95MHZ 4P 8KHZ BW 450 KHZ, 9 KHZ BW CERAMIC 450 KHZ, 9 KHZ BW CERAMIC C 225 C 227 EP 200 J 201 J 501 L 222 L 224 MP 801 MP 802 MP 803 MP 804 MP 806 R 230 R 261 RE 000 RE 000 Y 801 Z 221 Z 241 Z 242 39pF 5% NPO 0603 10pF +/-.1pF NPO 0603 MINI CER CRY PIN INSUL 14P SGL ROW RCPT.1CNTR STR TERM PCB 1+/-6%UH VAR. IND. 5MM 1+/-6%UH VAR. IND. 5MM CAN-VCO 3474 TOP SHIELD 3474 XMIT SHIELD 3474 BOTTOM XMIT 3474 SHIELD BOTTOM SYNTH XTAL FLTR SHIELD 3472 1.8K OHMS J 063W 0603 CHI 120K OHM J 063W 0603 CHIP SCHEMATIC DL 3474 MAIN ASSEMBLY DL 3474 MAIN BD 17.5 MHZ TCXO +/-1.5 PPM 52.95MHZ 4P 15KHZ BW CERAMIC DATA FILTER 450KH CERAMIC DATA FILTER 450KH C 225 39pF 5% NPO 0603 010-0345-280 615-7110-214 615-3013-030 642-1012-015 642-1012-015 017-2225-751 017-2225-761 017-2225-762 017-2225-763 017-2225-699 669-0155-272 669-0155-204 025-3474-030 027-3474-030 618-7009-521 632-0009-011 632-2004-015 632-2004-015 023-3474-521 610-3674-390 610-3673-100 010-0345-280 615-7110-214 615-3013-030 642-1012-015 642-1012-015 017-2225-751 017-2225-761 017-2225-762 017-2225-763 017-2225-699 669-0155-182 669-0155-124 025-3474-030 027-3474-030 618-7009-521 632-0009-009 632-2004-016 632-2004-016 023-3474-531 7-9 Part No. 001-3474-002 610-3674-390 PARTS LIST C 227 EP 200 J 201 J 501 L 222 L 224 MP 801 MP 802 MP 803 MP 804 MP 806 R 230 R 261 RE 000 RE 000 Y 801 Z 221 Z 241 Z 242 10pF +/-.1pF NPO 0603 MINI CER CRY PIN INSUL 14P SGL ROW RCPT.1CNTR STR TERM PCB 1+/-6%UH VAR. IND. 5MM 1+/-6%UH VAR. IND. 5MM CAN-VCO 3474 TOP SHIELD 3474 XMIT SHIELD 3474 BOTTOM XMIT 3474 SHIELD BOTTOM SYNTH XTAL FLTR SHIELD 3472 1.8K OHMS J 063W 0603 CHI 100k OHMS J 063W 0603 CHI SCHEMATIC DL 3474 MAIN ASSEMBLY DL 3474 MAIN BD 17.5 MHZ TCXO +/-1.5 PPM 52.95MHZ 4P 15KHZ BW 450 KHZ, 20 KHZ BW CERAMI 450 KHZ, 20 KHZ BW CERAMI 610-3673-100 010-0345-280 615-7110-214 615-3013-030 642-1012-015 642-1012-015 017-2225-751 017-2225-761 017-2225-762 017-2225-763 017-2225-699 669-0155-182 669-0155-104 025-3474-030 027-3474-030 618-7009-521 632-0009-009 632-2004-013 632-2004-013 This parts list applies to Band 5 transceivers. 7-10 Part No. 001-3474-002 SECTION 8 SCHEMATIC AND COMPONENT LAYOUTS TRANSISTOR AND DIODE BASING REFERENCE TABLE TRANSISTORS Part Number Basing Diagram Identification 676-0003-604 676-0003-616 676-0003-621 676-0003-634 676-0003-636 676-0003-640 676-0003-651 676-0006-450 676-0013-701 DIODES 3604 26 74 3B R25 24 1R 623-1504-001 623-1504-002 623-1504-023 623-5005-020 623-5005-022 4D 5A A7 INTEGRATED CIRCUITS 8-1 Part No. 001-3474-002 SCHEMATICS AND COMPONENT LAYOUTS Figure 8-1 VCO COMPONENT LAYOUT (COMPONENT SIDE VIEW) 8-2 Part No. 001-3474-002 SCHEMATICS AND COMPONENT LAYOUTS Figure 8-2 TRANSCEIVER COMPONENT LAYOUT (COMPONENT SIDE VIEW) 8-3 Part No. 001-3474-002 SCHEMATICS AND COMPONENT LAYOUTS Figure 8-3 TRANSCEIVER COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW) 8-4 Part No. 001-3474-002 SCHEMATICS AND COMPONENT LAYOUTS Figure 8-4 DM-3474 SCHEMATIC Company Confidential Copyright 1998 Johnson Data Telemetry Corporation 8-5 Part No. 001-3474-002 SCHEMATICS AND COMPONENT LAYOUTS This page intentionally left blank. 8-6 Part No. 001-3474-002
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