Galaxy Tracking Systems VTRAKH450 UHF-FM VehicleTracking Unit User Manual Cover

Galaxy Tracking Systems L.L.C. UHF-FM VehicleTracking Unit Cover

Contents

Service Manual

HIGH SPECIFICATION DATA TRANSCEIVERPART NO. 242-3474-XX0Second PrintingAugust 1998Part No. 001-3474-002 8-98 Printed in U.S.A.
HIGH SPECIFICATION DATA TRANSCEIVERPART NO. 242-3474-XX0Copyright 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 WARRANTYThe 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.WARNINGThis 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 INFORMATIONProper 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.
iTABLE OF CONTENTS1GENERAL INFORMATION1.1 SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11.2 EQUIPMENT DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1DM3474 SYNTHESIZER PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.3 TRANSCEIVER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11.4 PART NUMBER BREAKDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21.5 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21.6 FACTORY CUSTOMER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21.7 PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-31.8 REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-31.9 IF A PROBLEM ARISES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4FACTORY REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-52INSTALLATION2.1 PRE-INSTALLATION CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12.2 INTERFACING WITH DATA EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1DM3474 ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13PROGRAMMING3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13.2 DM3474 SYNTHESIZER DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1D-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1B-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2A-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23.3 RECEIVE TO TRANSMIT SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-63.4 TRANSMIT TO RECEIVE SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-74CIRCUIT DESCRIPTION4.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1RECEIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24.2 SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2VOLTAGE-CONTROLLED OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5VCO AND REFERENCE OSCILLATOR MODULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6CASCODE AMPLIFIERS (Q851/Q852). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6AMPLIFIER (Q853) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6VOLTAGE FILTER (Q832) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6VCO FREQUENCY SHIFT (Q831) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6SYNTHESIZER INTEGRATED CIRCUIT (U801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7LOCK DETECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
TABLE OF CONTENTSii4.3 RECEIVER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8HELICAL FILTER (Z201), RF AMPLIFIER (Q201) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8MIXER (U221), FIRST LO AMPLIFIER (Q301) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8AMPLIFIER (Q222), CRYSTAL FILTER (Z221/Z222), IF AMP (Q221). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8SECOND LO AMP/TRIPLER (Q401), SECOND IF FILTER (Q901). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9SECOND MIXER/DETECTOR (U241) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94.4 TRANSMITTER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10BUFFER (Q851). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10PRE-DRIVER (Q501), DRIVER (Q521). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11-5V POWER CONTROL SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11FINAL (Q541), POWER CONTROL (U542) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11ANTENNA SWITCH (CR561, CR562). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-115SERVICING5.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1PERIODIC CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1SURFACE-MOUNTED COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1REPLACEMENT PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1TCXO MODULE NOT SERVICEABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.2 SYNTHESIZER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1REFERENCE OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2SYNTHESIZER (U801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25.3 RECEIVER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3MIXER/DETECTOR (U201). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3RF AMPLIFIER (Q201) AND FIRST MIXER (Q221). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4RF AND IF AMPLIFIERS, FIRST MIXER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45.4 TRANSMITTER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-46ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.2 DL3474 TRANSCEIVER ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1FREQUENCY AND CONTROL LINE VOLTAGE CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12W TRANSMITTER POWER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1LOW POWER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2MODULATION FLATNESS ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3RECEIVER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4IF AND AUDIO ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-47PARTS LIST
TABLE OF CONTENTSiii8SCHEMATICS AND COMPONENT LAYOUTSVCO COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2TRANSCEIVER COMPONENT LAYOUT-COMPONENT SIDE VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3TRANSCEIVER COMPONENT LAYOUT-OPPOSITE SIDE VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4TRANSCEIVER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5LIST OF FIGURES3-1 D-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33-2 B-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43-3 A-WORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43-4 SERIAL INPUT WORD FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53-5 RX TO TX TIMING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63-6 TX TO RX TIMING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-74-1 DATA TRANSCEIVER BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34-2 U801 SYNTHESIZER BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44-3 U241 BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-95-1 RECEIVER SERVICING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45-2 TRANSMITTER SERVICING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-56-1 TRANSMITTER TEST SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26-2 RECEIVER TEST SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46-3 ALIGNMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-68-1 VCO COMPONENT LAYOUT (COMPONENT SIDE VIEW). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28-2 TRANSCEIVER COMPONENT LAYOUT (COMPONENT SIDE VIEW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38-3 TRANSCEIVER COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW) . . . . . . . . . . . . . . . . . . . . 8-48-4 TRANSCEIVER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5LIST OF TABLES1-1 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
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SECTION 11-1Part No. 001-3474-002GENERAL INFORMATION1.1 SCOPE OF MANUALThis service manual contains alignment and service information for the Johnson Data Telemetry (JDT) DM3474 UHF High Specification Data Module Transceiver.1.2 EQUIPMENT DESCRIPTION1.2.1 GENERALThe 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 PROGRAMMINGThe 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 IDENTIFICATIONThe transceiver identification number is printed on a label that is affixed to the PC board. The following information is contained in that number:3474 2A1 4 3 A12345Model RevisionLetter ManufactureDateWeek No.of Year YearPlant WarrantyNumberEighth Digitof PNRange
GENERAL INFORMATION1-2Part No. 001-3474-0021.4 PART NUMBER BREAKDOWNThe following is a breakdown of the part number used to identify this transceiver:1.5 ACCESSORIESAccessories available for the 3474 data transceiver are listed in Table 1-1.1.6 FACTORY CUSTOMER SERVICEThe 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 number1-800-992-7774Table 1-1 ACCESSORIESAccessory Part No.MCX to SMA RF cable 023-3472-009242-3474 - X Y Z 0 = Base2 = Portable1 = 12.5 kHz BW2 = 20 kHz BW3 = 25 kHz BW 9 = 25 kHz BW *8 = 12.5 kHz BW ** This number applies to 450-470 MHz transceivers.8 = 496-512 MHz7 = 480-496 MHz6 = 464-480 MHz5 = 450-466 MHz, 450-470 MHz4 = 435-451 MHz3 = 419-435 MHz2 = 403-419 MHz1 = 380-403 MHz
GENERAL INFORMATION1-3Part No. 001-3474-002When 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) 835-6911FAX Machine - Cust Serv(507) 835-6969You 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 CorporationCustomer Service Department299 Johnson AvenueP.O. Box 1733Waseca, MN 56093-0514support@johnsondata.com1.7 PRODUCT WARRANTYThe 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 PARTSReplacement 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
GENERAL INFORMATION1-4Part No. 001-3474-0021.9 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 REPAIRComponent 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.
GENERAL INFORMATION1-5Part No. 001-3474-002The 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.GENERALFrequency Range 403-512 MHzFrequency Control SynthesizedChannel Spacing 12.5/20/25 kHzMode of Operation Simplex or Half DuplexOperating Voltage +7.5V DC ±10%Regulated Supply Voltages +5V DC ±5%RF Input/Output MCX JackPower and Data Interface 14-pin in-line socket, 100 mil centerOperating Temperature -30° to +60° C (-22° to +140° F)Maximum Dimensions 2.83" L (7.19 cm), 2.19" W (5.56 cm), 0.64" H (1.70 cm)Weight (w/o Loader Bd) 2.3 oz (65 g)FCC Compliance DM3474 customer must applyRECEIVERBandwidth 16 MHzFrequency Stability ±1.5 PPMSensitivity - 12 dB SINAD 0.45 µVRF Input Impedance 50 ohmsSpurious and Image Rejection -70 dBSelectivity -60 dB (12.5 kHz), -70 dB (20/25 kHz)Intermodulation -70 dBFM Hum and Noise -40 dB (12.5 kHz), -45 dB (20/25 kHz)Conducted Spurious -57 dBmReceive Current Drain < 70 mA nominalReceive Attack Time < 7 ms (dependent on synthesizer loading implementation)Audio Distortion < 3% Output Level DM3474 600-1200 mV P-P or 200-400 mV RMS (1 kHz at ±3 kHz) Response DM3474 ±2 dB from DC to 5 kHz (reference to 1 kHz) Minimum Load Impedance 1k ohmsTRANSMITTERBandwidth 16 MHzFrequency Stability ±1.5 PPMTCXO Coupling DCRF Power Output 2W nominal adjustable to 500 mW (-XX0)500 mW nominal RF Output Impedance 50 ohmsModulation Distortion < 3%
GENERAL INFORMATION1-6Part No. 001-3474-002Duty Cycle 50%, 60 seconds maximum transmitTransmitter Attack Time < 7 ms (dependent on synthesizer implementation)Spurious and Harmonic FM -37 dBmFM Hum and Noise -40 dB 12.5 kHz, -45 dB 25 kHzAudio Response ±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.Data Input Impedance 100k ohmModulation Response ±1 dB from DC to 5 kHz (reference to 1 kHz)Current Drain < 800 mA at 2W, +7.5V DC
SECTION 22-1Part No. 001-3474-002INSTALLATION2.1 PRE-INSTALLATION CHECKSField 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 EQUIPMENT2.2.1 DM3474 ONLYConnector J201 on the data transceiver PC board provides the interface with the data equipment. This is a 14-pin 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.
INSTALLATION2-2Part No. 001-3474-002Pin 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.
SECTION 33-1Part No. 001-3474-002PROGRAMMING3.1 INTRODUCTIONThe 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 PROTOCOLProgramming 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-WORDRefer 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 kHzWhere:FCM = Loop Reference FrequencyFMOD = Fractional N ModulusSince 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.
PROGRAMMING3-2Part No. 001-3474-0023.2.2 B-WORDThe 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 CNLowest TX 86Highest TX 90Lowest RX 96Highest RX 100The 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 Binary458 MHz RX CN = 98 01100010 Binary3.2.3 A-WORDThe 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 sub-channels 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 kHzTo program an 18.75 kHz channel:NF = 18.75 kHz ÷ 6.25 kHz NF = 3
PROGRAMMING3-3Part No. 001-3474-002NM1 and NM2 are calculated as follows:N = (NM1 + 2) x 64 + NM2 x 65 Where: N = total division ratioNM1 = Number of main divider cycles when prescaler modulus equals 64NM2 = Number of main divider cycles when prescaler modulus equals 65Example: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= 37NM1 = INTEGER [N ÷ 64] - 2 - NM2= 158 - 2 - 37= 119Figure 3-1 D-WORD
PROGRAMMING3-4Part No. 001-3474-002Figure 3-2 B-WORDFigure 3-3 A-WORD
PROGRAMMING3-5Part No. 001-3474-002Figure 3-4 SERIAL INPUT WORD FORMAT
PROGRAMMING3-6Part No. 001-3474-0023.3 RECEIVE TO TRANSMIT SEQUENCERefer 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 DIAGRAMDekey 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.
PROGRAMMING3-7Part No. 001-3474-0023.4 TRANSMIT TO RECEIVE SEQUENCERefer 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 millisec-onds. 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 DIAGRAMSpeedup is 2 to 3 msLock is approximately 7 msRamp is approximately 3 msIMPORTANTIf 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.
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SECTION 44-1Part No. 001-3474-002CIRCUIT DESCRIPTION4.1 GENERAL4.1.1 INTRODUCTIONThe 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 SYNTHESIZERThe 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 RECEIVERThe 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
CIRCUIT DESCRIPTION4-2Part No. 001-3474-0024.1.4 TRANSMITTERThe 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 SYNTHESIZER4.2.1 INTRODUCTIONA 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.
CIRCUIT DESCRIPTION4-3Part No. 001-3474-002Figure 4-1 DATA TRANSCEIVER BLOCK DIAGRAM Z201RF AMPQ201 Z202MIXERCRYSTAL FILTERPREDRIVERQ501DRIVER FINAL ANTENNASWITCHRX AUDIOVCO+5V+5V+7.5V+7.5VRECEIVETRANSMITLOCKENABLEDATACLOCKAMPLIFIER+5VT/R PSNEG SUPRECEIVERTRANSMITTERSYNTHESIZERVCO BUFFER/RSSIANTENNALOW-PASSFILTERRF OUTRF BPF RF BPF U221Z221/Z22252.95 MHzQ222IF / 450 kHz FILTERQ521 Q541 CR561/562,U542Q4012nd LO AMP1st LO AMPQ851CLVQ853Q851/Q852AMPLIFIERRSSIRX OUTTX IN Y801TCXOMOD INPUTMOD ADJUSTSYNTH OUTRF INU801Q833Q101, Q102Q831, Q832Q834BUFFERU241U251Q301IF AMPQ221Q850
CIRCUIT DESCRIPTION4-4Part No. 001-3474-002Figure 4-2 U801 SYNTHESIZER BLOCK DIAGRAMCLOCKDATASTROBEVssRFINRFIN64/65/72PRESCALER MAIN DIVIDERSEM FB 2 2 12 8PR NM1 NM3NM2FRACTIONALACCUMULATORPRESCALERMODULUSCONTROL3FMOD NFFBSERIAL INPUT + PROGRAM LATCHES VDDTESTINREFEM+EAREFERENCE DIVIDER +2 +2 +2MAINMAINPHASEDETECTORREFERENCESELECT2SMEMREFERENCESELECT2SASECONDARYPHASEDETECTOREAAUXILIARYINEAAUX12NR12NAPAAUXILIARY DIVIDERPRESCALER1/4NORMALOUTPUTCHARGEPUMPOUTPUTCHARGEPUMPSPEED-UPOUTPUTCHARGEPUMPINTEGRALOUTPUTCHARGEPUMPAUXILIARYCN8CL2CK42VSSAVDDALOCKPHARAPHIPHPRNRF
CIRCUIT DESCRIPTION4-5Part No. 001-3474-0024.2.2 VOLTAGE-CONTROLLED OSCILLATOROscillator (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 ModulationThe 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.
CIRCUIT DESCRIPTION4-6Part No. 001-3474-0024.2.3 VCO AND REFERENCE OSCILLATOR MODULATIONBoth 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.
CIRCUIT DESCRIPTION4-7Part No. 001-3474-002When 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)IntroductionSynthesizer 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 ProgrammingFrequencies 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 oscillator-derived 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 DETECTWhen 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.
CIRCUIT DESCRIPTION4-8Part No. 001-3474-0024.3 RECEIVER CIRCUIT DESCRIPTION4.3.1 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.
CIRCUIT DESCRIPTION4-9Part No. 001-3474-0024.3.4 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 MixerAs 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.Figure 4-3 U241 BLOCK DIAGRAM1234DEMODULATORMIXEROSCILLATOR5678LIMITERAMPAMP161514131012119AUDIO OUTNCNCMIXER INL242C243C242Z241Z24252.5 MHz C410L404C241AFRSSI5.5V CONT
CIRCUIT DESCRIPTION4-10Part No. 001-3474-002Second IF FilterThe 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-AmplifierThe 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 DetectorFrom 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 AmplifierThe 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 DESCRIPTION4.4.1 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.
CIRCUIT DESCRIPTION4-11Part No. 001-3474-0024.4.2 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 SUPPLYThe 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.
CIRCUIT DESCRIPTION4-12Part No. 001-3474-002C567, 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.
5-1Part No. 001-3474-002SECTION 5SERVICING5.1 GENERAL5.1.1 PERIODIC CHECKSThis 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 COMPONENTSA 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 LAYOUTSSchematic 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 LISTA replacement parts list with all the parts used in this transceiver is located in Section 7. Parts are listed alpha-numerically according to designator. For information on ordering parts, refer to Section 1.8.5.1.5 TCXO MODULE NOT SERVICEABLEThe ±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 SERVICING5.2.1 INTRODUCTIONWhen 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).
SERVICING5-2Part No. 001-3474-002NOTE: 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 OSCILLATORCheck 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 VCOOutput 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 VoltageCheck 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 FrequencyCheck 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 DetectorWhen the VCO is locked on frequency, the lock detect output on J201, pin 7 should be high.
SERVICING5-3Part No. 001-3474-0025.3 RECEIVER SERVICINGTo 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 CURRENTMeasure the supply voltages on the following pins at interface connector J201: Pin 4 - 5.0V DC Receive Pin 5 - 5.0V DCPlace 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 mA5.3.2 MIXER/DETECTOR (U201)Data OutputUsing 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 OutputThe 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.
SERVICING5-4Part No. 001-3474-002Figure 5-1 RECEIVER SERVICING FLOWCHART5.3.3 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 MIXERCheck 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 SERVICING5.4.1 SUPPLY VOLTAGES AND CURRENTMeasure the supply voltages on the following pins of interface connector J201:
SERVICING5-5Part No. 001-3474-002 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 maxPlace 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 mAFigure 5-2 TRANSMITTER SERVICING FLOWCHART
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SECTION 66-1Part No. 001-3474-002ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6.1 GENERALReceiver 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 ONLY6.2.1 FREQUENCY AND CONTROL LINE VOLTAGE CHECK1. 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 DC6. Unkey the transmitter.6.2.2 2W TRANSMITTER POWER ALIGNMENT1. 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.
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6-2Part No. 001-3474-0026. 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 SETUP6.2.3 LOW POWER ALIGNMENT1. 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.
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6-3Part No. 001-3474-0026. 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 ALIGNMENT1. 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).
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6-4Part No. 001-3474-002Figure 6-2 RECEIVER TEST SETUP6.2.5 RECEIVER ALIGNMENTC 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 ADJUSTMENTS1. 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)
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6-5Part No. 001-3474-002NOTE: 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.)
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS6-6Part No. 001-3474-002Figure 6-3 ALIGNMENT POINTS DIAGRAMR509
SECTION 77-1Part No. 001-3474-002PARTS LIST. 023-3474-515SYMBOL NUMBER DESCRIPTION PART NUMBERA 801 FINISHED 450-466 VCO(M9 023-3474-540C 101 68pF 5% NPO 0603 610-3674-680C 102 68pF 5% NPO 0603 610-3674-680C 103 68pF 5% NPO 0603 610-3674-680C 104 68pF 5% NPO 0603 610-3674-680C 105 68pF 5% NPO 0603 610-3674-680C 106 68pF 5% NPO 0603 610-3674-680C 107 68pF 5% NPO 0603 610-3674-680C 108 68pF 5% NPO 0603 610-3674-680C 109 68pF 5% NPO 0603 610-3674-680C 110 68pF 5% NPO 0603 610-3674-680C 111 68pF 5% NPO 0603 610-3674-680C 112 68pF 5% NPO 0603 610-3674-680C 113 68pF 5% NPO 0603 610-3674-680C 114 1.0UFD 16V SMD TANT RL 610-2625-109C 115 68pF 5% NPO 0603 610-3674-680C 116 .01MF X7R K 0603 CHPR 610-3675-103C 117 1.0UFD 16V SMD TANT RL 610-2625-109C 118 68pF 5% NPO 0603 610-3674-680C 119 68pF 5% NPO 0603 610-3674-680C 131 1.0UFD 16V SMD TANT RL 610-2625-109C 132 68pF 5% NPO 0603 610-3674-680C 133 .01MF X7R K 0603 CHPR 610-3675-103C 134 1.0UFD 16V SMD TANT RL 610-2625-109C 135 68pF 5% NPO 0603 610-3674-680C 201 68pF 5% NPO 0603 610-3674-680C 203 68pF 5% NPO 0603 610-3674-680C 204 10pF +/-.1pF NPO 0603 610-3673-100C 205 4.7pF +/-.1pF NPO 0603 610-3673-479C 207 68pF 5% NPO 0603 610-3674-680C 208 68pF 5% NPO 0603 610-3674-680C 211 68pF 5% NPO 0603 610-3674-680C 222 .01MF X7R K 0603 CHPR 610-3675-103C 223 3.9pf +/-.1pF NPO 0603 610-3673-399C 224 3.0pf +/-.1pF NPO 0603 610-3673-309C 225 .01MF X7R K 0603 CHPR 610-3675-103C 226 .01MF X7R K 0603 CHPR 610-3675-103C 227 8.2pF +/-.1pF NPO 0603 610-3673-829C 228 .01MF X7R K 0603 CHPR 610-3675-103
PARTS LIST7-2Part No. 001-3474-002C 229 .01MF X7R K 0603 CHPR 610-3675-103C 230 .01MF X7R K 0603 CHPR 610-3675-103C 232 1.5-5PF SMD CERAMIC 612-1602-001C 235 .01MF X7R K 0603 CHPR 610-3675-103C 241 .01MF X7R K 0603 CHPR 610-3675-103C 242 .1UFD X7R J 1206 RL 610-3609-104C 243 .1UFD X7R J 1206 RL 610-3609-104C 245 .01MF X7R K 0603 CHPR 610-3675-103C 246 1.0UFD 16V SMD TANT RL 610-2625-109C 247 .01MF X7R K 0603 CHPR 610-3675-103C 248 .01MF X7R K 0603 CHPR 610-3675-103C 261 27pF 5% NPO 0603 610-3674-270C 262 68pF 5% NPO 0603 610-3674-680C 263 .1UFD X7R J 1206 RL 610-3609-104C 265 .1UFD X7R J 1206 RL 610-3609-104C 301 68pF 5% NPO 0603 610-3674-680C 302 8.2pF +/-.1pF NPO 0603 610-3673-829C 303 68pF 5% NPO 0603 610-3674-680C 304 3.3pF +/-.1pF NPO 0603 610-3673-339C 306 68pF 5% NPO 0603 610-3674-680C 309 1.0UFD 16V SMD TANT RL 610-2625-109C 310 3.3pF +/-.1pF NPO 0603 610-3673-339C 401 .01MF X7R K 0603 CHPR 610-3675-103C 402 .01MF X7R K 0603 CHPR 610-3675-103C 403 .01MF X7R K 0603 CHPR 610-3675-103C 404 .01MF X7R K 0603 CHPR 610-3675-103C 405 82pF 5% NPO 0603 610-3674-820C 406 6.8pF +/-.1pF NPO 0603 610-3673-689C 407 82pF 5% NPO 0603 610-3674-820C 410 .1UFD X7R J 1206 RL 610-3609-104C 501 68pF 5% NPO 0603 610-3674-680C 502 6.8pF +/-.1pF NPO 0603 610-3673-689C 503 68pF 5% NPO 0603 610-3674-680C 504 470pF 5% NPO 0603 610-3674-471C 505 .01MF X7R K 0603 CHPR 610-3675-103C 506 68pF 5% NPO 0603 610-3674-680C 507 68pF 5% NPO 0603 610-3674-680C 508 68pF 5% NPO 0603 610-3674-680C 509 68pF 5% NPO 0603 610-3674-680C 510 120pF 5% NPO 0603 610-3674-121C 511 3.9pf +/-.1pF NPO 0603 610-3673-399C 520 22pF 5% NPO 0603 610-3674-220C 521 68pF 5% NPO 0603 610-3674-680C 522 .01MF X7R K 0603 CHPR 610-3675-103C 523 68pF 5% NPO 0603 610-3674-680C 524 470pF 5% NPO 0603 610-3674-471C 525 27pF 5% NPO 0603 610-3674-270C 526 18PF NPO J 0805 CHP RL (L 610-3601-180C 527 2.5-10PF SMD CERAMIC 612-1602-002C 528 10pF +/-.1pF NPO 0603 610-3673-100SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-3Part No. 001-3474-002C 541 68pF 5% NPO 0603 610-3674-680C 542 470pF 5% NPO 0603 610-3674-471C 546 68pF 5% NPO 0603 610-3674-680C 547 68pF 5% NPO 0603 610-3674-680C 548 1.0UFD 16V SMD TANT RL 610-2625-109C 549 .01MF X7R K 0603 CHPR 610-3675-103C 550 33PF NPO J 0805 CHP RL (L 610-3601-330C 551 15PF NPO J 0805CHP RL (L0 610-3601-150C 552 3.9PF NPO J 0805CHP RL 610-3601-399C 553 2.5-10PF SMD CERAMIC 612-1602-002C 554 68pF 5% NPO 0603 610-3674-680C 555 33pF 5% NPO 0603 610-3674-330C 560 22pF 5% NPO 0603 610-3674-220C 561 5.6PF NPO J 0805CHP RL (L 610-3601-569C 562 6.2PF NPO J0805 CHP RL 610-3601-629C 563 7.5PF NPO J0805 CHP RL 610-3601-759C 564 .01MF X7R K 0603 CHPR 610-3675-103C 565 68pF 5% NPO 0603 610-3674-680C 567 5.6PF NPO J 0805CHP RL (L 610-3601-569C 568 47pF 5% NPO 0603 610-3674-470C 569 5.1PF NPO J0805 CHP RL 610-3601-519C 570 33pF 5% NPO 0603 610-3674-330C 571 68pF 5% NPO 0603 610-3674-680C 572 .01MF X7R K 0603 CHPR 610-3675-103C 573 1.0UFD 16V SMD TANT RL 610-2625-109C 801 .01MF X7R K 0603 CHPR 610-3675-103C 802 .01MF X7R K 0603 CHPR 610-3675-103C 803 .01MF X7R K 0603 CHPR 610-3675-103C 804 3.3pF +/-.1pF NPO 0603 610-3673-339C 805 .01MF X7R K 0603 CHPR 610-3675-103C 806 68pF 5% NPO 0603 610-3674-680C 807 .01MF X7R K 0603 CHPR 610-3675-103C 808 68pF 5% NPO 0603 610-3674-680C 809 100PF NPO J 0805CHP RL (L 610-3601-101C 810 .1UFD X7R J 1206 RL 610-3609-104C 811 .001uF 10% X7R 0603 610-3675-102C 812 .0047UF X7R K 0805 C/R (L 610-3605-472C 813 .001uF 10% X7R 0603 610-3675-102C 814 1.0UFD 16V SMD TANT RL 610-2625-109C 815 .0047UF X7R K 0805 C/R (L 610-3605-472C 817 68pF 5% NPO 0603 610-3674-680C 818 1.0UFD 16V SMD TANT RL 610-2625-109C 819 3.9pf +/-.1pF NPO 0603 610-3673-399C 831 .01MF X7R K 0603 CHPR 610-3675-103C 832 .01MF X7R K 0603 CHPR 610-3675-103C 833 68pF 5% NPO 0603 610-3674-680C 834 4.7UFD 10V SMD TANT RL 610-2624-479C 835 .01MF X7R K 0603 CHPR 610-3675-103C 836 .01MF X7R K 0603 CHPR 610-3675-103C 837 .01MF X7R K 0603 CHPR 610-3675-103SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-4Part No. 001-3474-002C 838 68pF 5% NPO 0603 610-3674-680C 839 .01MF X7R K 0603 CHPR 610-3675-103C 840 .01MF X7R K 0603 CHPR 610-3675-103C 841 68pF 5% NPO 0603 610-3674-680C 842 .01MF X7R K 0603 CHPR 610-3675-103C 844 1.0UFD 16V SMD TANT RL 610-2625-109C 845 .01MF X7R K 0603 CHPR 610-3675-103C 846 68pF 5% NPO 0603 610-3674-680C 847 .01MF X7R K 0603 CHPR 610-3675-103C 848 68pF 5% NPO 0603 610-3674-680C 849 68pF 5% NPO 0603 610-3674-680C 850 68pF 5% NPO 0603 610-3674-680C 851 68pF 5% NPO 0603 610-3674-680C 852 68pF 5% NPO 0603 610-3674-680C 855 .01MF X7R K 0603 CHPR 610-3675-103CR 201 SWITCHING DIODE SOT-23 623-1504-002CR 561 SOT PIN SW DIODE T/RL 623-1504-001CR 562 SOT PIN SW DIODE T/RL 623-1504-001CR 831 DUAL SW DIODE SOT23 623-1504-023CR 832 BB535 SOD 323 VARACTOR 623-5005-022EP 200 MINI CER CRY PIN INSUL 010-0345-280EP 501 FERRITE BEAD SMD 617-2503-001EP 541 FERRITE BEAD SMD 617-2503-001J 201 14P SGL ROW RCPT.1CNTR 615-7110-214J 501 STR TERM PCB 615-3013-030L 201 INDUCT LL2012 F8.2N 0805 642-9003-826L 202 22 NHY0805 SMD 10% INDUCT 642-9003-227L 222 1+/-6%UH VAR. IND. 5MM 642-1012-015L 223 0.82 MHY SMD INDUCTOR 642-9001-828L 224 1+/-6%UH VAR. IND. 5MM 642-1012-015L 242 QUAD COIL 68OUH//180PF SM 642-5102-001L 301 10 NHY0805 SMD 10% INDUCT 642-9003-107L 302 INDUCT LL2012 F15N 0805 S 642-9003-157L 401 .100 UHY SMD INDUCTOR 642-9001-108L 402 .100 UHY SMD INDUCTOR 642-9001-108L 404 1.0 UHY SMD INDUCTOR 642-9001-109L 501 INDUCT LL2012 F15N 0805 S 642-9003-157L 502 1.0 UHY SMD INDUCTOR 642-9001-109L 503 INDUCT LL2012 F15N 0805 S 642-9003-157L 521 10T 43.0nh SMD AIR CORE I 642-0030-010L 522 INDUCT LL2012 F3N3 0805 S 642-9003-336L 541 5T 18.5nh SMD AIR CORE IN 642-0030-005L 561 5T 18.5nh SMD AIR CORE IN 642-0030-005L 562 9T 35.5nh SMD AIR CORE IN 642-0030-009L 563 9T 35.5nh SMD AIR CORE IN 642-0030-009L 564 5T 18.5nh SMD AIR CORE IN 642-0030-005L 565 1.0 UHY SMD INDUCTOR 642-9001-109L 566 12.5nH SM AIR CORE IND (L 642-0030-004L 801 39 NHY0805 SMD 10% INDUCT 642-9003-397L 851 1.0 UHY SMD INDUCTOR 642-9001-109SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-5Part No. 001-3474-002MP 801 CAN-VCO 3474 017-2225-751MP 802 TOP SHIELD 3474 XMIT 017-2225-761MP 803 SHIELD 3474 BOTTOM XMIT 017-2225-762MP 804 3474 SHIELD BOTTOM SYNTH 017-2225-763MP 806 XTAL FLTR SHIELD 3472 017-2225-699PC 001 PCB DL 3474 MAIN (MUL6) 035-3474-030Q 101 NPN TRANS SOT 23 80V 676-0003-616Q 102 DIG TRANS DCT114WK S23 676-0003-621Q 103 NPN TRANS SOT 23 80V 676-0003-616Q 131 NPN TRANS SOT 23 80V 676-0003-616Q 201 MMBR5031 SOT23NPN XSTR 676-0003-606Q 221 VHF/UHF AMP SOT-23 676-0003-634Q 222 SOT SI N-CHAN JFET 676-0006-019Q 301 IV (NPN) 85633 SOT23 R25 676-0003-636Q 401 VHF/UHF AMP SOT-23 676-0003-634Q 501 IV (NPN) 85633 SOT23 R25 676-0003-636Q 521 NPN SO8 .2-2GHZ XSTR 676-0003-604Q 541 RF FET TRANS 676-0006-450Q 831 NPN TRANS SOT 23 80V 676-0003-616Q 832 NPN SC70 MSD1819 GEN PURP 676-0013-701Q 833 VHF/UHF AMP SOT-23 676-0003-634Q 834 DIG TRANS DCT114WK S23 676-0003-621Q 851 BIPOLAR MMIC, SOT143 676-0003-640R 120 100k OHMS J 063W 0603 CHI 669-0155-104R 131 100k OHMS J 063W 0603 CHI 669-0155-104R 201 47 OHMS J 063W 0603 CHIP 669-0155-470R 202 2.7K OHM J 063W 0603 CHIP 669-0155-272R 203 750 OHM RES J 063W 0603 C 669-0155-751R 204 330 OHMS J 063W 0603 CHIP 669-0155-331R 222 330 OHMS J 063W 0603 CHIP 669-0155-331R 223 22K OHMS J 063W 0603 CHIP 669-0155-223R 224 1K OHM J 063W 0603 CHIP 669-0155-102R 225 15k OHMS J 063W 0603 CHIP 669-0155-153R 226 470 OHMS J 063W 0603 CHIP 669-0155-471R 228 10 OHMS J 063W 0603 CHIP 669-0155-100R 229 330 OHMS J 063W 0603 CHIP 669-0155-331R 230 2.7K OHM J 063W 0603 CHIP 669-0155-272R 241 62K OHMS J 063W 0603 CHIP 669-0155-623R 242 27K OHMS J 063W 0603 CHIP 669-0155-273R 243 270 OHMS J 063W 0603 CHIP 669-0155-271R 261 200k OHMS J 063W 0603 CHI 669-0155-204R 262 100k OHMS J 063W 0603 CHI 669-0155-104R 263 10K OHMS J 063W 0603 CHIP 669-0155-103R 264 18k OHMS J 063W 0603 CHIP 669-0155-183R 265 10 OHMS J 063W 0603 CHIP 669-0155-100R 267 12K OHMSJ 063W 0603 CHIP 669-0155-123R 268 10K OHMS J 063W 0603 CHIP 669-0155-103R 269 10K OHMS J 063W 0603 CHIP 669-0155-103R 270 10K OHMS J 063W 0603 CHIP 669-0155-103R 271 10K OHMS J 063W 0603 CHIP 669-0155-103SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-6Part No. 001-3474-002R 301 3.3K OHM J 063W 0603 CHIP 669-0155-332R 302 1.8K OHMS J 063W 0603 CHI 669-0155-182R 303 180 OHMS J 063W 0603 CHIP 669-0155-181R 304 470 OHMS J 063W 0603 CHIP 669-0155-471R 401 10 OHMS J 063W 0603 CHIP 669-0155-100R 402 15k OHMS J 063W 0603 CHIP 669-0155-153R 403 4.7K OHM J 063W 0603 CHIP 669-0155-472R 404 680 OHMS J 063W 0603 CHIP 669-0155-681R 501 2.2K OHMS J 063W 0603 CHI 669-0155-222R 502 1.8K OHMS J 063W 0603 CHI 669-0155-182R 503 10 OHMS J 063W 0603 CHIP 669-0155-100R 504 560 OHMS J 063W 0603 CHIP 669-0155-561R 506 100 OHMS J 063W 0603 CHIP 669-0155-101R 508 ZERO OHM J 0805 CHIP/R 669-0105-001R 509 470 OHM SMD TRIMMER 662-0130-471R 521 1K OHM J 063W 0603 CHIP 669-0155-102R 522 150 OHMS J 063W 0603 CHIP 669-0155-151R 524 220 OHMS J 063W 0603 CHIP 669-0155-221R 541 10 OHMS J 063W 0603 CHIP 669-0155-100R 542 10K OHM SMD TRIMMER 662-0130-103R 543 10K OHMS J 063W 0603 CHIP 669-0155-103R 546 47 OHMS J 063W 0603 CHIP 669-0155-470R 550 10 OHMS J 063W 0603 CHIP 669-0155-100R 551 10 OHMS J 063W 0603 CHIP 669-0155-100R 562 RES 270R 0.75W +/-5% (L07 669-0135-271R 564 47K OHMS J 063W 0603 CHIP 669-0155-473R 801 10K OHMS J 063W 0603 CHIP 669-0155-103R 802 10K OHMS J 063W 0603 CHIP 669-0155-103R 804 10 OHMS J 063W 0603 CHIP 669-0155-100R 805 27K OHMS J 063W 0603 CHIP 669-0155-273R 806 12K OHMSJ 063W 0603 CHIP 669-0155-123R 807 4.7K OHM J 063W 0603 CHIP 669-0155-472R 808 18k OHMS J 063W 0603 CHIP 669-0155-183R 810 220K OHM SMD TRIMMER 662-0130-224R 811 27K OHMS J 063W 0603 CHIP 669-0155-273R 812 10K OHMS J 063W 0603 CHIP 669-0155-103R 813 100k OHMS J 063W 0603 CHI 669-0155-104R 814 20 OHM J 063W 0603 CHIP 669-0155-200R 817 4.7K OHM J 063W 0603 CHIP 669-0155-472R 831 10K OHMS J 063W 0603 CHIP 669-0155-103R 834 10K OHMS J 063W 0603 CHIP 669-0155-103R 835 100 OHMS J 063W 0603 CHIP 669-0155-101R 836 4.7K OHM J 063W 0603 CHIP 669-0155-472R 838 100 OHMS J 063W 0603 CHIP 669-0155-101R 839 1K OHM J 063W 0603 CHIP 669-0155-102R 840 22K OHMS J 063W 0603 CHIP 669-0155-223R 841 15k OHMS J 063W 0603 CHIP 669-0155-153R 842 1K OHM J 063W 0603 CHIP 669-0155-102R 844 680 OHMS J 063W 0603 CHIP 669-0155-681R 845 18 OHMS J 063W 0603 CHIP 669-0155-180SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-7Part No. 001-3474-002R 846 18 OHMS J 063W 0603 CHIP 669-0155-180R 847 18 OHMS J 063W 0603 CHIP 669-0155-180R 848 1.5K OHM J 063W 0603 CHIP 669-0155-152R 851 150 OHMS J 063W 0603 CHIP 669-0155-151R 852 39 OHM J 0603 CHIP/R 669-0155-390R 853 150 OHMS J 063W 0603 CHIP 669-0155-151R 854 82 OHMS 5% 063W 0603 SMD 669-0155-820R 855 100K SMD TRIMMER 662-0130-104R 856 4.7K OHM J 063W 0603 CHIP 669-0155-472R 857 4.7K OHM J 063W 0603 CHIP 669-0155-472R 858 4.7K OHM J 063W 0603 CHIP 669-0155-472R 860 100 OHMS J 063W 0603 CHIP 669-0155-101RE 000 SCHEMATIC DL 3474 MAIN 025-3474-030RE 000 SCHEMATIC DL 3474 MAIN 025-3474-030RE 000 ASSEMBLY DL 3474 MAIN BD 027-3474-030RM 000 SLDR 62/36/2 H20 CLEAN 684-1606-062U 101 5.5V REG 50-6 644-2603-086U 131 5.5V REG 50-6 644-2603-086U 221 DBL BAL MIXER MOT-1-04 644-0007-014U 241 FM IF MC3371D SO-16 644-2002-031U 261 MC33172D SO8 OP AMP 644-2019-017U 801 FRACTIONAL-N SYNTHESIZER 644-3954-027Y 801 17.5 MHZ TCXO +/-1.5 PPM 618-7009-521Z 201 SMD HEL FLTR 459 MHZ 3 PO 632-1005-044Z 202 SMD HEL FLTR 459 MHZ 3 PO 632-1005-044Z 221 52.95MHZ 4P 8KHZ BW 632-0009-011Z 241 450 KHZ, 9 KHZ BW CERAMIC 632-2004-015Z 242 450 KHZ, 9 KHZ BW CERAMIC 632-2004-015023-3474-542C 850 68pF 5% NPO 0603 610-3674-680C 851 68pF 5% NPO 0603 610-3674-680C 852 8.2pF +/-.1pF NPO 0603 610-3673-829C 853 9.1pf +/-.1pF NPO 0603 610-3673-919C 854 100pF 5% NPO 0603 610-3674-101C 855 68pF 5% NPO 0603 610-3674-680C 856 2.7pF +/-.1pF NPO 0603 610-3673-279C 858 68pF 5% NPO 0603 610-3674-680C 859 7.5pF +/-.1pF NPO 0603 610-3673-759C 861 8.2pF +/-.1pF NPO 0603 610-3673-829C 862 6.8pF +/-.1pF NPO 0603 610-3673-689C 863 68pF 5% NPO 0603 610-3674-680C 864 10pF +/-.1pF NPO 0603 610-3673-100C 865 68pF 5% NPO 0603 610-3674-680C 866 68pF 5% NPO 0603 610-3674-680C 867 68pF 5% NPO 0603 610-3674-680C 868 1.5pF +/-.1pF NPO 0603 610-3673-159C 870 1pF +/-.1pF NPO 0603 610-3673-109C 871 100pF 5% NPO 0603 610-3674-101SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-8Part No. 001-3474-002C 873 100pF 5% NPO 0603 610-3674-101C 874 3.3pF +/-.1pF NPO 0603 610-3673-339C 876 8.2pF +/-.1pF NPO 0603 610-3673-829C 877 1pF +/-.1pF NPO 0603 610-3673-109C 878 10PF NPO J 0805 CHP RL 610-3601-100CR 850 SOT PIN SW DIODE T/RL 623-1504-001CR 851 BB535 SOD 323 VARACTOR 623-5005-022CR 852 VAR DIODE SOD123 BB515 623-5005-020CR 853 VAR DIODE SOD123 BB515 623-5005-020CR 854 BB535 SOD 323 VARACTOR 623-5005-022CR 855 BB535 SOD 323 VARACTOR 623-5005-022CR 856 BB535 SOD 323 VARACTOR 623-5005-022L 851 150 NHY0805 SMD 10% IN 642-9003-158L 852 150 NHY0805 SMD 10% IN 642-9003-158L 853 22 NHY0805 SMD 10% IND 642-9003-227L 854 150 NHY0805 SMD 10% IN 642-9003-158L 855 INDUCT LL2012 F56N 080 642-9003-567L 856 22 NHY0805 SMD 10% IND 642-9003-227Q 850 NPN TRANS NE85619 SC90 676-0003-651Q 851 NPN TRANS NE85619 SC90 676-0003-651Q 852 NPN TRANS NE85619 SC90 676-0003-651Q 853 NPN TRANS NE85619 SC90 676-0003-651R 851 10K OHMS J 063W 0603 C 669-0155-103R 852 47K OHMS J 063W 0603 C 669-0155-473R 853 47K OHMS J 063W 0603 C 669-0155-473R 854 10 OHMS J 063W 0603 CH 669-0155-100R 856 10 OHMS J 063W 0603 CH 669-0155-100R 857 6.8K OHM J 063W 0603 C 669-0155-682R 858 1K OHM J 063W 0603 CHI 669-0155-102R 862 10K OHMS J 063W 0603 C 669-0155-103R 863 10 OHMS J 063W 0603 CH 669-0155-100R 864 10K OHMS J 063W 0603 C 669-0155-103R 865 10K OHMS J 063W 0603 C 669-0155-103R 866 470 OHMS J 063W 0603 C 669-0155-471R 867 12K OHMSJ 063W 0603 CH 669-0155-123R 868 390 OHMS J 063W 0603 C 669-0155-391R 869 270 OHMS J 063W 0603 C 669-0155-271R 870 18 OHMS J 063W 0603 CH 669-0155-180R 871 3.9K OHM J 063W 0603 C 669-0155-392R 872 1.8K OHMS J 063W 0603 669-0155-182R 874 680 OHMS J 063W 0603 C 669-0155-681R 875 270 OHMS J 063W 0603 C 669-0155-271RM 000 SLDR 62/36/2 H20 CLEAN 684-1606-062Z 850 0.5IN LONG SMD RESONAT 642-9004-005 023-3474-511C 225 .01MF X7R K 0603 CHPR 610-3675-103C 227 8.2pF +/-.1pF NPO 0603 610-3673-829SYMBOL NUMBER DESCRIPTION PART NUMBER
PARTS LIST7-9Part No. 001-3474-002EP 200 MINI CER CRY PIN INSUL 010-0345-280J 201 14P SGL ROW RCPT.1CNTR 615-7110-214J 501 STR TERM PCB 615-3013-030L 222 1+/-6%UH VAR. IND. 5MM 642-1012-015L 224 1+/-6%UH VAR. IND. 5MM 642-1012-015MP 801 CAN-VCO 3474 017-2225-751MP 802 TOP SHIELD 3474 XMIT 017-2225-761MP 803 SHIELD 3474 BOTTOM XMIT 017-2225-762MP 804 3474 SHIELD BOTTOM SYNTH 017-2225-763MP 806 XTAL FLTR SHIELD 3472 017-2225-699R 230 2.7K OHM J 063W 0603 CHIP 669-0155-272R 261 200k OHMS J 063W 0603 CHI 669-0155-204RE 000 SCHEMATIC DL 3474 MAIN 025-3474-030RE 000 ASSEMBLY DL 3474 MAIN BD 027-3474-030Y 801 17.5 MHZ TCXO +/-1.5 PPM 618-7009-521Z 221 52.95MHZ 4P 8KHZ BW 632-0009-011Z 241 450 KHZ, 9 KHZ BW CERAMIC 632-2004-015Z 242 450 KHZ, 9 KHZ BW CERAMIC 632-2004-015023-3474-521C 225 39pF 5% NPO 0603 610-3674-390C 227 10pF +/-.1pF NPO 0603 610-3673-100EP 200 MINI CER CRY PIN INSUL 010-0345-280J 201 14P SGL ROW RCPT.1CNTR 615-7110-214J 501 STR TERM PCB 615-3013-030L 222 1+/-6%UH VAR. IND. 5MM 642-1012-015L 224 1+/-6%UH VAR. IND. 5MM 642-1012-015MP 801 CAN-VCO 3474 017-2225-751MP 802 TOP SHIELD 3474 XMIT 017-2225-761MP 803 SHIELD 3474 BOTTOM XMIT 017-2225-762MP 804 3474 SHIELD BOTTOM SYNTH 017-2225-763MP 806 XTAL FLTR SHIELD 3472 017-2225-699R 230 1.8K OHMS J 063W 0603 CHI 669-0155-182R 261 120K OHM J 063W 0603 CHIP 669-0155-124RE 000 SCHEMATIC DL 3474 MAIN 025-3474-030RE 000 ASSEMBLY DL 3474 MAIN BD 027-3474-030Y 801 17.5 MHZ TCXO +/-1.5 PPM 618-7009-521Z 221 52.95MHZ 4P 15KHZ BW 632-0009-009Z 241 CERAMIC DATA FILTER 450KH 632-2004-016Z 242 CERAMIC DATA FILTER 450KH 632-2004-016 023-3474-531C 225 39pF 5% NPO 0603 610-3674-390
PARTS LIST7-10Part No. 001-3474-002This parts list applies to Band 5 transceivers.C 227 10pF +/-.1pF NPO 0603 610-3673-100EP 200 MINI CER CRY PIN INSUL 010-0345-280J 201 14P SGL ROW RCPT.1CNTR 615-7110-214J 501 STR TERM PCB 615-3013-030L 222 1+/-6%UH VAR. IND. 5MM 642-1012-015L 224 1+/-6%UH VAR. IND. 5MM 642-1012-015MP 801 CAN-VCO 3474 017-2225-751MP 802 TOP SHIELD 3474 XMIT 017-2225-761MP 803 SHIELD 3474 BOTTOM XMIT 017-2225-762MP 804 3474 SHIELD BOTTOM SYNTH 017-2225-763MP 806 XTAL FLTR SHIELD 3472 017-2225-699R 230 1.8K OHMS J 063W 0603 CHI 669-0155-182R 261 100k OHMS J 063W 0603 CHI 669-0155-104RE 000 SCHEMATIC DL 3474 MAIN 025-3474-030RE 000 ASSEMBLY DL 3474 MAIN BD 027-3474-030Y 801 17.5 MHZ TCXO +/-1.5 PPM 618-7009-521Z 221 52.95MHZ 4P 15KHZ BW 632-0009-009Z 241 450 KHZ, 20 KHZ BW CERAMI 632-2004-013Z 242 450 KHZ, 20 KHZ BW CERAMI 632-2004-013
SECTION 88-1Part No. 001-3474-002SCHEMATIC AND COMPONENT LAYOUTSINTEGRATED CIRCUITSTRANSISTOR AND DIODE BASINGREFERENCE TABLETRANSISTORSPart Number Basing Diagram Identification676-0003-604 2 3604676-0003-616 1 26676-0003-621 1 74676-0003-634 13B676-0003-636 1R25676-0003-640 3-676-0003-651 1 24676-0006-450 4-676-0013-701 11RDIODES623-1504-001 -4D623-1504-002 -5A623-1504-023 -A7623-5005-020 -S623-5005-022 -S
SCHEMATICS AND COMPONENT LAYOUTS8-2Part No. 001-3474-002Figure 8-1 VCO COMPONENT LAYOUT (COMPONENT SIDE VIEW)
SCHEMATICS AND COMPONENT LAYOUTS8-3Part No. 001-3474-002Figure 8-2 TRANSCEIVER COMPONENT LAYOUT (COMPONENT SIDE VIEW)
SCHEMATICS AND COMPONENT LAYOUTS8-4Part No. 001-3474-002Figure 8-3 TRANSCEIVER COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW)
SCHEMATICS AND COMPONENT LAYOUTS8-5Part No. 001-3474-002Figure 8-4 DM-3474 SCHEMATICCompany ConfidentialCopyright 1998 Johnson Data Telemetry Corporation
SCHEMATICS AND COMPONENT LAYOUTS8-6Part No. 001-3474-002This page intentionally left blank.

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