CalAmp Wireless Networks 2424096-001 T-96SR 900MHz Transceiver/Modem User Manual Cover

CalAmp Wireless Networks Corporation T-96SR 900MHz Transceiver/Modem Cover

Contents

Transceiver Manual

-1April 1997 Part No. 001-3492-0013492 Synthesized 900 MHz TransceiverService ManualFirst PrintingJune 1997Part No. 001-3492-001 6-97mwp Printed in U.S.A.
-3April 1997 Part No. 001-3492-0013492 SYNTHESIZED 900 MHZ TRANSCEIVERSERVICE MANUALCopyright 1997 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. In addition, the Johnson Data Telemetry Corporation provides wireless commu-nication solutions to the mobile data market serving public safety, utilities and industrial users.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, PO 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 harm-ful interference. In addition, changes or modification to this equipment not expressly approved by the Johnson Data Teleme-try 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 termi-nated.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 Commu-nication Commission limits.The information in this document is subject to change without notice.™ Johnson Data Telemetry is a trademark of the Johnson Data Telemetry Corporation.
1TABLE OF CONTENTS1GENERAL INFORMATION1.1 SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 EQUIPMENT DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1DL3492 WITH LOADER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1DL3492 WITH MODEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2DM3492 SYNTHESIZER PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.3 TRANSCEIVER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.4 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.5 PART NUMBER BREAKDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.6 FACTORY CUSTOMER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.7 PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.8 REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.9 FACTORY RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32INSTALLATION2.1 PRE-INSTALLATION CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.2 INTERFACING WITH DATA EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1DM3492 (RF Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13PROGRAMMING3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.2 DM3492 SYNTHESIZER DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1SYNTHESIZER DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1D-WORD CALCULATION (24 BITS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1C-WORD CALCULATION (24 BITS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2B-WORD CALCULATION (24 BITS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2A0-WORD CALCULATION (24 BITS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2TX / RX FREQUENCY SHIFT AND BAND SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3RADIO DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.3 RECEIVE TO TRANSMIT SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.4 TRANSMIT TO RECEIVE SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64CIRCUIT DESCRIPTION4.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1RECEIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.2 SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1VOLTAGE-CONTROLLED OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3VCO AND REFERENCE OSCILLATOR MODULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3CASCADE AMPLIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3VOLTAGE FILTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3VCO FREQUENCY SHIFT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4SYNTHESIZER INTEGRATED CIRCUIT (U800) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5LOCK DETECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
2TABLE OF CONTENTS4.3 RECEIVER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5CERAMIC FILTER, RF AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5MIXER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5FIRST LO AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5CRYSTAL FILTER, FIRST IF SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6SECOND LO/MIXER/DETECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-64.4 TRANSMITTER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7DRIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7FINAL, COMPARATOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7ANTENNA SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7TRANSMIT KEY-UP CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-74.5 VOLTAGE REGULATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8+9.6 AND +5.5V REGULATED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-85SERVICING5.1 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1SYNTHESIZER (U800) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25.3 RECEIVER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2MIXER/DETECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2SECOND LO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3AUDIO BUFFER AMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3CRYSTAL FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3MIXER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3LOW NOISE AMPLIFIER (LNA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3ANTENNA SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35.4 TRANSMITTER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3FINAL AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3ANTENNA SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3MODULATION INPUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4TCXO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
3TABLE OF CONTENTS6ALIGNMENT PROCEDURE6.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.2 TEST EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.3 INITIAL SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.4 VCO CONTROL VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.5 TRANSMITTER AND FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1MODULATION ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.6 TRANSMITTER/FREQUENCY WITH LOADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2MODULATION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.7 RECEIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37PARTS LIST8SCHEMATICS AND COMPONENT LAYOUTS
1-1June 1997 Part No. 001-3492-001SECTION 1 GENERAL INFORMATION1.1 SCOPE OF MANUALThis service manual contains alignment and ser-vice information for the JDT DM3492 900 MHz Syn-thesized Telemetry Unit.This manual concentrates on the RF section of the data link which may be paired with an internal Loader board or 9600 baud Modem board.Service manuals addressing items specific to the Loader board (001-3240-001) and the Modem board (001-3276-001) should be referenced for the users specific configuration.1.2 EQUIPMENT DESCRIPTION1.2.1 GENERALThe JDT DM3492 is a synthesized data trans-ceiver (transmitter and receiver) which operates in the 928-960 MHz UHF frequency range. Transmitter power output is 1-5 watts, 5W at 13.3V nominal, and operation is simplex or half duplex.In addition to this 900 MHz radio, JDT has a full line of radios and radio modems to meet wireless data communication needs. Both OEM RF decks and com-plete FCC type approved radios and radio modems are available from 132-174 MHz at VHF, 380-512 MHz at UHF and 928-960 MHz at 900 MHz in both 5W and 2W units (VHF and UHF). High Specification units are available to meet International requirements and bandwidths to meet U.S.A. refarming requirements. To learn more about the other JDT products, call 1-800-992-7774 or 1-612-890-8155 to speak to a sales representative.1.2.2 DL3492 WITH LOADER BOARDThe DL3492 (Part No. 242-3492-5x0) includes the 8-channel Loader Board (Part No. 023-3240-001), which performs synthesizer loading through an RS-232 DB-9 interface. The Loader Board has cir-cuitry which provides electronic control of the following:lTransmit/Receive data conditioning and gatinglCarrier DetectlPower ControllPreselector TrackinglModulation FlatnesslAudio/Data FilteringlSleep/Wake-up to minimize current consumptionlDiagnostics that include: Input Voltage Sense Input Current Sense Ambient Temperature Sense RSSI Indicator (RSSI Sense) Forward/Reverse Power Sense. The gating circuits allow the type of data filtering to be selected (standard or wide band) and also pre-emphasis/de-emphasis to be enabled or disabled.This board is programmed using an IBM PC or compatible computer and the Johnson Data Telemetry programming software. Programming information is stored by an EEPROM on the Loader board. Refer to Section 3.3 for programming information.
GENERAL INFORMATION1-2June 1997Part No. 001-3492-001NOTE: The synthesizer must be loaded each time pow-er is turned on. Therefore, one loader board or cus-tomer supplied programming circuit is required for each data transceiver.1.2.3 DL3492 WITH MODEMThe DL3492 (Part No. 242-3492-5x0) includes the 9600 baud Modem (Part No. 023-3276-001), which supports the RNET™ communication proto-col, allowing data communication between the Johnson Data Telemetry high specification synthe-sized products and the Motorola RNET radio/modems.The Modem features include:lUser Programmable Data Rates; 9600, 4800, 2400 and 1200 baud in a 25 kHz bandwidth.lRS-232 compatible.lSimplex or Half-Duplex operation.lRTS-CTS handshaking protocol with option for configuring any two units as a digital repeater.lSupports asynchronous, serial or transparent data formats.lFront panel LEDs provide indication for Transmit, Receive and Power.lBuilt-In Diagnostics reported both locally and "Over-The-Air":Reports specific unit programmingLoopback test featureRSSIForward and Reflected PowerTemperatureSupply Voltagel8-Channels programmable with option to switch channels remotely "Over-The-Air".This board is programmed using an IBM PC or compatible computer and the RSS programming soft-ware. The 3276 Modem Programming Kit (Part No. 023-3276-005) includes programming instructions contained in the RSS Manual.1.2.4 DM3492 SYNTHESIZER PROGRAMMINGThe DM3492, when used without the Universal Loader Board (Part No. 023-3240-001) requires cus-tomer supplied circuitry to load the synthesizer with channel information. The protocol that this circuitry must follow is described in Section 3.1.3 TRANSCEIVER IDENTIFICATIONThe transceiver identification number is printed on a label that is affixed to the PC board. The follow-ing information is contained in that number:1.4 ACCESSORIESAccessories available for the 3492 data trans-ceiver are listed in Table 1-1.1.5 PART NUMBER BREAKDOWNThe following is a breakdown of the part number used to identify this transceiver:Table 1-1 ACCESSORIESAccessory Part No.3276 Service Manual 001-3276-0013240 Service Manual 001-3240-001Interface cable 023-3472-0073492 2A1 4 3 A12345Model RevisionLetterNinth Digitof PNManufactureDateWeek No.of Year YearPlant WarrantyNumber242-3492 - 5 X 01 = 12.5 kHz BW5 = 928-960 MHz3 = 25 kHz BW
GENERAL INFORMATION1-3June 1997 Part No. 001-3492-0011.6 FACTORY CUSTOMER SERVICEThe Customer Service Department of the Johnson Data Telemetry Corporation provides cus-tomer assistance on technical problems and the avail-ability of local and factory repair facilities. Customer Service hours are 7:30 a.m. - 4:30 p.m. Central Time, Monday - Friday. There is also a 24-hour emergency technical support telephone number. From within the continental United States, the Customer Service Department can be reached at this toll-free number1-800-992-7774When your call is answered at the Johnson Data Telemetry Corporation, you will hear a brief message informing you of numbers that can be entered to reach various departments. This number may be entered during or after the message using a tone-type tele-phone. If you have a pulse-type telephone, wait until the message is finished and an operator will come on the line to assist you. When you enter a first number of "3", another number is requested to further catego-rize the type of information you need. You may also enter the 4-digit extension number of the person that you want to reach if you know what it is.FAX Machine - Sales (507) 835-6485FAX Machine - Cust Serv (507) 835-6969If you are calling from outside the continental United States, the Customer Service telephone num-bers are as follows:Customer Service Department - (507) 835-6911Customer Service FAX Machine - (507) 835-6969You may also contact the Customer Service Department by mail. Please include all information that may be helpful in solving your problem. The mailing address is as follows:Johnson Data Telemetry CorporationCustomer Service Department299 Johnson AvenueP.O. Box 1733Waseca, MN 56093-08331.7 PRODUCT WARRANTYThe warranty statement for this transceiver is available from your product supplier or from the War-ranty Department, Johnson Data Telemetry Corpora-tion, 299 Johnson Avenue, PO Box 1733, Waseca, MN 56093-0833. This information may also be requested by phone from the Warranty Department. The Warranty Department may also be contacted for Warranty Service Reports, claim forms, or any ques-tions concerning warranties or warranty service by dialing (507) 835-6970.1.8 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 sup-ply the part number and quantity of each part ordered. Johnson Data Telemetry dealers also need to give their account number.If there is uncertainty about the part number, include the designator (C112, for example) and the model number of the equipment the part is from (refer to Section 1.3).You may also send your order by mail or FAX. The mailing address is as follows and the FAX num-ber is shown in Section 1.6.Johnson Data Telemetry CorporationService Parts Department299 Johnson AvenuePO Box 1733Waseca, MN 56093-08331.9 FACTORY RETURNSRepair service is normally available through local authorized Johnson Data Telemetry Land Mobile Radio Service Centers. If local service is not avail-able, the equipment can be returned to the factory for repair. However, it is recommended that you contact the Field Service Department before returning equip-ment. A service representative may be able to suggest a solution to the problem so that return of the equip-ment would not be necessary. If using the toll-free number in the preceding section, enter "3".
GENERAL INFORMATION1-4June 1997Part No. 001-3492-001Be sure to fill out a Factory Repair Request Form #271 for each unit to be repaired, whether it is in or out of warranty. These forms are available free of charge by calling the repair lab (see Section 1.6) or by requesting them when you send a unit in for repair. Clearly describe the difficulty experienced in the space provided and also note any prior physical dam-age to the equipment. Include a form in the shipping container with each unit. Your phone number and contact name are very important because there are times when the technicians have specific questions that need to be answered in order to completely iden-tify and repair a problem.When returning equipment for repair, it is also a good idea to use a PO number or some other reference number on your paperwork in case you need to call the repair lab about your unit. These numbers are ref-erenced on the repair order to make it easier and faster to locate your unit in the lab.Return Authorization (RA) numbers are not nec-essary unless you have been given one by the Field Service Department. They require RA numbers for exchange units or if they want to be aware of a spe-cific problem. If you have been given an RA number, reference this number on the Factory Repair Request Form sent with the unit. The repair lab will then con-tact the Field Service Department when the unit arrives.
GENERAL INFORMATION1-5June 1997 Part No. 001-3492-0013492 UHF SYNTHESIZED TELEMETRY UNIT SPECIFICATIONSThe following are general specifications intended for use in testing and servicing this transceiver. For current ad-vertised specifications, refer to the specification sheet available from the Marketing Department. Specifications are subject to change without notice.GENERALFrequency Range 928-960 MHzFrequency Control SynthesizedChannel Spacing 12.5/25 kHz with 6.25 kHz Channel stepsMode of Operation Simplex or Half DuplexOperating Voltage +13.3V DC nominal (10-16V DC operational)Regulated Supply Voltages +5V DC ±5%Transmit Enable 3-16V DC at 400 µA maxReceive Current 70 mA maximumTransceiver Enable 3-16V DC at less than 400 µAPower and Data Connector 14-pin in-line socket (Dupont 76308-14)RF Input/Output SMA Jack (female)Operating Temperature -30°C to +60°C (-22°F to +140°F) Storage Temperature -40°C to +85°C (-40°F to +185°F)Humidity 95% maximum RH at 40°C, non-condensingMaximum Dimensions 4.585" L, 3.25" W, 2.2" HFCC Compliance Parts 90, 94, 15DM3492 Customer must applyRECEIVERBandwidth 32 MHzFrequency Stability ±1.5 PPM from -30°C to +60°C (-22°F to +140°F)Sensitivity - 12 dB SINAD ≤ 0.35 µV, -116 dBm psophometrically weightedRF Input Impedance 50 ohmsSelectivity 65 dB 25 kHz, 60 dB 12.5 kHzSpurious and Image Rejection 70 dBConducted Spurious Emissions < -57 dBmIntermodulation 70 dBFM Hum and Noise -40 dB, 25 kHz channels, -35 dB, 12.5 kHz channels Receive Attack Time < 5 ms Total Receive On Time 7 ms maximumAudio Distortion < 3% psophometrically weighted Response ±1/-3 dB 0 to 2.5 kHz for 12.5 kHz Channel, 0 to 5 kHz for 25 kHz Channel Output Bias 2.5V DC ±0.5V DC Buffered Impedance >10k ohms Buffered Audio Level 150 mV ±50 mVRSSI 0.7V to 2.0V DC output from -120 to -60 dBm
GENERAL INFORMATION1-6June 1997Part No. 001-3492-001 TRANSMITTERFrequency Stability ±1.5 PPM from -30°C to +60°C (-22°F to +140°F)Bandwidth 32 MHzMaximum System Deviation 5 kHz (25 kHz Channel), 2.5 kHz (12.5 kHz Channel)Frequency Spread 32 MHzModulation FM/DC coupledWideband Data Input Bias 2.5V DC ±1%Narrow Band Input AC coupledInput Impedance >50k ohmsAudio Distortion < 3% at 3 kHz deviation, 1 kHz tone (with user interface board narrow band data portAudio Response ±2 dB, DC to 5 kHz dev with a 1 kHz tone Programmable to ± dB using DACFlatness ±1 dB across 32 MHz bandwidthRF Power Output 1-5W ±20% adjustable (5W at 13.3V DC nominal)Deviation Symmetry 5%RF Output Impedance 50 ohmsDuty Cycle 50% (30 sec. max transmit)Transmitter Adjacent Power -70 dBIntermodulation Attenuation -40 dBSpurious and Harmonic FM -20 dBm max.FM Hum and Noise -40 dB 25 kHz, -35 dB 12.5 kHz
2-1June 1997 Part No. 001-3492-001SECTION 2 INSTALLATION2.1 PRE-INSTALLATION CHECKSField alignment should not be required before the 3492 is installed. However, it is still 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 DM3492 (RF Board)Connector 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 cable (Part No. 023-3472-007) is not included with the data trans-ceiver. An interface cable diagram and pin designa-tions are shown in Figure 2-1.The following is a general description of the input and output signals on Transceiver Interface con-nector J201.Pin 1 (Ground) - Chassis ground.Pin 2 (+13.3V DC) - Input, transceiver main power. Input range 10-16V DC with ±3 dB variation in output power. Pin 3 (Tx En) - Input +3-16V DC. Enables transmit circuitry. ≤ 0.3V DC in Rx mode.Pin 4 (Rx En) - Input +3-16V DC. Enables receive cir-cuitry. ≤ 0.3 V DC in Tx mode.Pin 5 (RF En) - Input +3-16V DC. Shuts down on-board regulators. To be used as a power save mode.Pin 6 (Mod In) - Provides a response of ±2 dB from DC to 5 kHz across the RF band (referenced to 1 kHz). It is programmable to 1 dB with the diagnostic DAC. The modulation capability is 250 mV RMS ±3 dB that produces ±5 kHz deviation with a 1 kHz tone. When this input is used, a temperature compen-sated 2.5V DC bias is required as variations in voltage cause the frequency to change. The transceiver regula-tory compliance must be applied for with the customer supplied modulation limiting/filter circuit and chassis. Pin 7 (Synth Lock) - Output from synthesizer lock de-tect circuit. Low (< 1V DC) = unlocked, high (>2.5V DC) = locked.Pin 8 (Synth En) - TTL input. Latch enable signal for synthesizer. 250 ns min. for D, C and B words; 3 ms min. for A0 word. A rising edge latches the data loaded into the synthesizer IC..Pin 9 (Data) - TTL input. Serial data line used for pro-gramming the synthesizer and diagnostic functions.Pin 10 (Synth Clock) - TTL input. Clock signal for se-rial data input on Pin 9. Data is valid on the rising edge. 1 MHz max. frequency.Pin 11 (Diag En) - TTL input. Loads programmed DAC values into DAC (U900) for modulation adjust and power set. Also provides the strobe signal for shift register (u901) for selecting Forward and Reverse pow-er diagnostics. 250 ns min. activates on rising edge. Pin 12 (RSSI) - Analog output (0.5-2V DC). The Re-ceive Signal Strength Indicator output provides a volt-age that increases in proportion to the strength of the RF input signal. Pin 13 (Demod) - Analog output. The Receiver De-mod output level is 150 mV RMS with a modulation signal of 1 kHz at 60% of maximum deviation. The out-put is DC coupled and referenced to +2.5V DC. Load impedance should be >10k ohms.Pin 14 (Diag) - Analog Output. This pin is enabled by pin 11. When the Loader board is used it has the capa-bility to test the operating environment through diag-nostics. The diagnostic capabilities are in Section 1.2.2
INSTALLATION2-2June 1997Part No. 001-3492-001 Figure 2-1 DM3492 INTERFACE CABLE14 13 12 11 10 912345678RSSIDATASYNTH ENSYNTH LOCKGROUNDDEMODMOD INTX ENRF ENSYNTH CLOCK (1.3 MHz)DIAGDIAG ENRX EN+13.3V DCPART NO. 023-3472-007
3-1June 1997 Part No. 001-3492-001SECTION 3 PROGRAMMING3.1 INTRODUCTIONDM3492 - 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 DM3492 SYNTHESIZER DATA PROTOCOL3.2.1 GENERALThe 928-960 MHz band is divided into two seg-ments for the purpose of reducing VCO gain. The "LOW" band covers the 928-944 MHz segment and the "HIGH" band covers the 944-960 MHz segment. The VCO band selection is accomplished by capaci-tive pin-switching. The band switching is imple-mented in both the transmit and receive modes. The front-end filters and transmitter line-up cover the entire 928-960 MHz band without adjustment.Receive Bandwidth 928-960 MHzTransmit Bandwidth 928-960 MHzFirst IF 87.850 MHzSecond IF 450.0 kHzFirst LO Injection 840.150-872.150 MHz*Second LO Injection 87.40 MHz*TCXO Frequency 17.50 MHzResolution 6.25 kHzLoop Comparison Freq. 50 kHz* Low Side InjectionA diagram of the 32 Bit Synthesizer Serial Data Stream with definitions of the bits is shown in Figure 3-1.Clock 1 MHz (max)Synth Enable 250 ns (min) (for D, C and B wordsapproximately 3 ms for A0 word)D00-D23 D, C, B and A0 words3.2.2 SYNTHESIZER DATAIn order to implement the band selection and Tx/Rx frequency shift mentioned in Section 3.2.1, an additional shift register was added to the synthesizer section. Therefore, an additional 8 Bits of data are added to each of the synthesizer load words (D/C/B/A0) as shown in the serial data stream in Figure 3-1.3.2.3 D-WORD CALCULATION (24 BITS)The D-Word programs the Main, Reference and Auxiliary dividers, and sets the modulus (refer to Figures 3-2 and 3-6).NR = 350 Ftcxo/50 kHz=350 where Ftcxo=17.5 MHzSM = 00 Reference select for main phase detectorEM = 1 Main divider enable flagSA = 00 Reference select for aux phase detectorEA = 1 Auxiliary divider enable flagFMOD = 1 Selects modulus 8LONG = 0 Send all 4 words with A0D Word = 0xA1 0x5E 0x26Figure 3-1 32-BIT SYNTHESIZER SERIAL DATA STREAMD1 D0 XXXXXX XXLSB (00)DataClockSynth EnMSB (31)D23 D22 D21 D20 - - Tx-Tx+Low-Low+
PROGRAMMING3-2June 1997Part No. 001-3492-0013.2.4 C-WORD CALCULATION (24 BITS)The C-Word enables the auxiliary prescaler, and sets the auxiliary divide ratio for the secondary (Sec-ond LO) loop (refer to Figures 3-4 and 3-7).PA = 0 Sets aux prescaler mode to ÷ 4NA = 437 (0x1B5) Auxiliary divide ratio87.4 MHz ÷ (4 x 437) = 50 kHzC-Word = 0x91 0xB5 0x003.2.5 B-WORD CALCULATION (24 BITS)The B-Word programs the Fractional-N charge pump current setting factor. The Binary acceleration factors (CL/CK) and prescaler type (modulus 3).The value of CN should be interpolated for fre-quencies between the band edges. With these recom-mended values of CN, the transceiver should have the fractional spurs minimized far below the levels needed to make 70 dB adjacent channel Rx or Tx specifica-tions.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 3492 synthesizer has an adjust (R823) for the fractional compensation cur-rent. The factory preset value will allow CN to be set to the following ranges: (Refer to Figures 3-3 and 3-7)Frequency in a Band CNLowest Tx 110Highest Tx 115Lowest Rx 100Highest Rx 105CN = * (Channel/Frequency dependent variable) (110-115 Tx) (100-105 Rx)CK = 0000 Binary acceleration factor for integral charge pumpCL = 00 Binary acceleration factor for proportional charge pumpPR = 10 Selects modulus 3 prescalerB-Word = 0x80 (8 bit CN) 0x023.2.6 A0-WORD CALCULATION (24 BITS)The A0-Word is sent last (see Figure 3-5). The A0-Word contains the data for the loop dividers and is programmed on a channel-by-channel basis. The Functional-N (NF) word is a 3 bit word that programs the synthesizer to the fractional steps determined by the fractional modulus selection flag (1 = modulus 8) and the loop comparison frequency (50 kHz). The fre-quency resolution (i.e. step size) is then 50 kHz ÷ 8 = 6.25 kHz.NF=* Fractional increment for modulus 8 (3 bits)NM1=* Number of main divider cycles when prescaler modulus equals 64 (12 bits)NM2=* Number of main divider cycles when prescaler modulus equals 65 (4 bits, PR=10)NM3=* Number of main divider cycles when prescaler modulus equals 72 (4 bits, PR=10)* Indicates frequency/channel dependant variable.EXAMPLE: To program an 18.75 kHz channel:NF = 18.75 kHz ÷ 6.25 kHz NF = 3NM1, NM2 and NM3 are calculated as follows:N = (NM1 + 2) x 64 + NM2 x 65 + (NM3 +1) x 72Where:N = Total division ratioNM1 = Number of main divider cycles when prescaler modulus equals 64NM2 = Number of main divider cycles when prescaler modulus equals 65NM3 = Number of main divider cycles when prescaler modulus equals 72Example:Calculate NM1, NM2 and NM3 to Rx 944.150 MHzRx LO = 944.15 - 87.85 = 856.3 MHz (Synth Freq) (87.85 MHz IF with Low Side Injection)N = Rx LO ÷ FCM = 856.3 ÷ 0.05 = 17126 (FCM = Loop Reference Frequency)
PROGRAMMING3-3June 1997 Part No. 001-3492-001NM3 = (INT(64 x FRAC [N ÷ 64]) ÷ 8) - 1 = (INT(64 x 0.59375) ÷ 8) - 1= (INT(38 ÷ 8)) - 1= 4 - 1= 3NM2 = 8 x FRAC [N ÷ 8] = 8 x 0.75= 6NM1 = INTEGER [N ÷ 64] - NM2 - NM3 - 3= 267 - 6 - 3 - 3= 2553.2.7 TX / RX FREQUENCY SHIFT AND BAND SELECTIONAs mentioned in 3.2.2, in order to implement the band selection and Rx/Rx an additional 8 bits of data are added to each of the synthesizer load words (D/C/B/AO) (see Figure 3-1). The frequency bands and Transmit/Receive Bits are defined as follows:Low Band 928-944 MHzHigh Band >944 MHz to 960 MHzxx Don’t careLow+ Low Band Select (1=lowband, 0=highband)Low- Low Band Select (0=lowband, 1=highband)Tx+ Transmit Select (1=Tx mode, 0=Rx mode)Tx- Transmit Select (0=Tx mode, 1=Rx mode)Figure 3-2 D-WORD4321 141312111098765 2019181715 16 242322211 1 1 1 1 1 1 1 00/110000000000000ADDRESSBITS= 350 FOR 50 kHz REFERENCE EA (ALWAYS 1)FMOD (1 = MODULUS 8)SA (ALWAYS 00)EM (ALWAYS 1)SM (ALWAYS 00)LONG (0=24 BIT WORD)NR (REFERENCE DIVIDE)
PROGRAMMING3-4June 1997Part No. 001-3492-001 Figure 3-3 C-WORDFigure 3-4 B-WORDFigure 3-5 A0-WORD4321 141312111098765 2019181715 16 242322211 0 1 1 1 1 1 0 0000000000000010ADDRESSBITS= 437 FOR 50 kHz REFERENCE PA (ALWAYS 0)NA (AUXILIARY DIVIDE RATIO) (ALWAYS 0)4321 141312111098765 2019181715 16 242322211 0 000000000000ADDRESSBITS0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0 1NOT USED(ALWAYS 0000) (CHANNEL DEPENDENT)CK(CHARGE PUMP CURRENT SETTING)CN CLBINARY ACCELERATIONFACTOR (ALWAYS 000000)PR (PRESCALER TYPE) (10=MODULUS 3)4321 141312111098765 2019181715 16 24232221ADDRESSBITS0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/100/10/10/10/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1NM1(NUMBER OF MAIN DIVIDER CYCLES WHEN PRESCALER MODULUS = 64)NM20/10/10/1NF(NUMBER OF MAIN DIVIDER CYCLESWHEN PRESCALER MODULUS = 65)
PROGRAMMING3-5June 1997 Part No. 001-3492-001Figure 3-6 SERIAL INPUT WORD FORMAT241A0BCDE0NF NM1NM3 NM20 0 0 0 0 0 01 CN CK CL PRPR="10"0 01 1 NA PA 001 01 NR SM EM SA EAFMODLONG1 11 1 0 0 0 T1 T0 0ADDRESS BITS TEST BITS124NOTE: E-Word not used in Synthesizer load.Figure 3-7 DIAGNOSTIC SERIAL DATA STREAMXXXXXX XXXX A1 A0 Rng D7 D6 D5 D4 D3 D2 D1 D0 XXXXXX XXXX XXXX a0LSB (00)MSB (23)DataClockDiag En
PROGRAMMING3-6June 1997Part No. 001-3492-0013.2.8 RADIO DIAGNOSTICSThe diagnostic features allow the user to program a Digital-To-Analog Converter (DAC) to adjust RF output power and modulation flatness without remov-ing the radio from the enclosure. Bit "a0" can be set to provide an analog voltage representative of the for-ward and reverse RF power at the radio interface con-nector J201, pin 14. This feature can be used to moni-tor the condition of the transceiver and antenna/feedline. Figure 3-7 is a diagram of the Diagnostic Serial Data Stream with definitions of the bits. It is 19 bits long, the front (MSBs) can be padded with "Don’t Cares" (XXs) to get to 24 bits.Clock 1 MHz (max)Diag Enable 250 ns (min)XX Don’t CareDAC BitsA1-A0 = DAC Output Select00=Power Set Data=0x00 to 0xFF, RNG=101=Mod Adj Data=0x00 to 0xFF, RNG=111=DAC Control Select Data=0x00 to 0xFF, RNG=1RNG = Range Select (max output) (Ref=5.5V÷2)0 = 1 x Ref1 = 2 x RefD7-D0 = D/A Data0x00 = 0.0V0xFF = 1 x Ref (RNG=0)0xFF = 2 x Ref (RNG=1)Shift Register Bits:a0 = Diagnostic Select to J201, pin 14 (Analog Voltage)0 = Forward Power1 = Reverse Power3.3 RECEIVE TO TRANSMIT SEQUENCE1. Synthesizer is loaded (D, C, B and A0 words). Refer to Figure 3-8.2. The state of the RX_EN line does not have to be changed until the last bit is sent. However, Recieve 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 then the Synth Enable should be returned to a low state.4. After the last word is strobed in, 7 milliseconds (worst case) should elapse before TX_EN is turned ON. This allows the synthesizer to come within 1 kHz of the desired frequency.Figure 3-8 RX TO TX TIMING DIAGRAM"Ramp-Up" is the amount of time required for the transmitter to reach full power once the TX EN has been applied. The Ramp-Up circuitry (located on the transceiver) minimizes adjacent channel interfer-ence caused by spectral spreading (sinx/x) when the transmitter is keyed. The Ramp-Up time is approxi-mately 3 ms.3.4 TRANSMIT TO RECEIVE SEQUENCE1. TX_EN is turned OFF. This signal is shaped. Refer to Figure 3-9.2. The synthesizer load process could begin slightly before, but when the last bit is strobed in the synthe-sizer it will become unlocked.3. The RX_EN line should switch from low to high AFTER the TX_EN is switched. The RX_EN not only turns the RX circuits on but also Pin Shifts the VCO.D0D24D0 D24 D0 D24"D" WORD "B" WORD "A" WORDDATACLOCKt=0SPEEDUP RAMP-UPLOCKRX_ENSYNTH_EN9V TXTX_EN"C" WORD
PROGRAMMING3-7June 1997 Part No. 001-3492-0014. 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 syn-thesizer in the SPEEDUP mode has poor noise per-formance and would degrade the Receive performance.Figure 3-9 TX TO RX TIMING DIAGRAMSpeedup is 2 to 3 msLock is approximately 7 msRamp is approximately 3 msDekey is approximately 3 ms"Ramp-Down" is the amount of time required for the transmitter output power to be reduced before switching off the transmitter and enabling the receiver with the RX EN. The Ramp-Down circuitry (located on the transceiver) minimizes adjacent channel inter-ference caused by spectral spreading (sinx/x) when the transmitter un un-keyed. The Ramp-Down time is approximately 3 ms.D0D24D0 D24 D0 D24"D" WORD "B" WORD "A" WORDDATACLOCKt=0RAMP-DOWN SPEEDUPRX_ENSYNTH_EN9V TXTX_EN"C" WORD
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3-1June 1997 Part No. 001-3492-001SECTION 3 PROGRAMMING3.1 INTRODUCTIONDM3492 - 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 DM3492 SYNTHESIZER DATA PROTOCOL3.2.1 GENERALThe 928-960 MHz band is divided into two seg-ments for the purpose of reducing VCO gain. The "LOW" band covers the 928-944 MHz segment and the "HIGH" band covers the 944-960 MHz segment. The VCO band selection is accomplished by capaci-tive pin-switching. The band switching is imple-mented in both the transmit and receive modes. The front-end filters and transmitter line-up cover the entire 928-960 MHz band without adjustment.Receive Bandwidth 928-960 MHzTransmit Bandwidth 928-960 MHzFirst IF 87.850 MHzSecond IF 450.0 kHzFirst LO Injection 840.150-872.150 MHz*Second LO Injection 87.40 MHz*TCXO Frequency 17.50 MHzResolution 6.25 kHzLoop Comparison Freq. 50 kHz* Low Side InjectionA diagram of the 32 Bit Synthesizer Serial Data Stream with definitions of the bits is shown in Figure 3-1.Clock 1 MHz (max)Synth Enable 250 ns (min) (for D, C and B wordsapproximately 3 ms for A0 word)D00-D23 D, C, B and A0 words3.2.2 SYNTHESIZER DATAIn order to implement the band selection and Tx/Rx frequency shift mentioned in Section 3.2.1, an additional shift register was added to the synthesizer section. Therefore, an additional 8 Bits of data are added to each of the synthesizer load words (D/C/B/A0) as shown in the serial data stream in Figure 3-1.3.2.3 D-WORD CALCULATION (24 BITS)The D-Word programs the Main, Reference and Auxiliary dividers, and sets the modulus (refer to Figures 3-2 and 3-6).NR = 350 Ftcxo/50 kHz=350 where Ftcxo=17.5 MHzSM = 00 Reference select for main phase detectorEM = 1 Main divider enable flagSA = 00 Reference select for aux phase detectorEA = 1 Auxiliary divider enable flagFMOD = 1 Selects modulus 8LONG = 0 Send all 4 words with A0D Word = 0xA1 0x5E 0x26Figure 3-1 32-BIT SYNTHESIZER SERIAL DATA STREAMD1 D0 XXXXXX XXLSB (00)DataClockSynth EnMSB (31)D23 D22 D21 D20 - - Tx-Tx+Low-Low+
PROGRAMMING3-2June 1997Part No. 001-3492-0013.2.4 C-WORD CALCULATION (24 BITS)The C-Word enables the auxiliary prescaler, and sets the auxiliary divide ratio for the secondary (Sec-ond LO) loop (refer to Figures 3-4 and 3-7).PA = 0 Sets aux prescaler mode to ÷ 4NA = 437 (0x1B5) Auxiliary divide ratio87.4 MHz ÷ (4 x 437) = 50 kHzC-Word = 0x91 0xB5 0x003.2.5 B-WORD CALCULATION (24 BITS)The B-Word programs the Fractional-N charge pump current setting factor. The Binary acceleration factors (CL/CK) and prescaler type (modulus 3).The value of CN should be interpolated for fre-quencies between the band edges. With these recom-mended values of CN, the transceiver should have the fractional spurs minimized far below the levels needed to make 70 dB adjacent channel Rx or Tx specifica-tions.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 3492 synthesizer has an adjust (R823) for the fractional compensation cur-rent. The factory preset value will allow CN to be set to the following ranges: (Refer to Figures 3-3 and 3-7)Frequency in a Band CNLowest Tx 110Highest Tx 115Lowest Rx 100Highest Rx 105CN = * (Channel/Frequency dependent variable) (110-115 Tx) (100-105 Rx)CK = 0000 Binary acceleration factor for integral charge pumpCL = 00 Binary acceleration factor for proportional charge pumpPR = 10 Selects modulus 3 prescalerB-Word = 0x80 (8 bit CN) 0x023.2.6 A0-WORD CALCULATION (24 BITS)The A0-Word is sent last (see Figure 3-5). The A0-Word contains the data for the loop dividers and is programmed on a channel-by-channel basis. The Functional-N (NF) word is a 3 bit word that programs the synthesizer to the fractional steps determined by the fractional modulus selection flag (1 = modulus 8) and the loop comparison frequency (50 kHz). The fre-quency resolution (i.e. step size) is then 50 kHz ÷ 8 = 6.25 kHz.NF=* Fractional increment for modulus 8 (3 bits)NM1=* Number of main divider cycles when prescaler modulus equals 64 (12 bits)NM2=* Number of main divider cycles when prescaler modulus equals 65 (4 bits, PR=10)NM3=* Number of main divider cycles when prescaler modulus equals 72 (4 bits, PR=10)* Indicates frequency/channel dependant variable.EXAMPLE: To program an 18.75 kHz channel:NF = 18.75 kHz ÷ 6.25 kHz NF = 3NM1, NM2 and NM3 are calculated as follows:N = (NM1 + 2) x 64 + NM2 x 65 + (NM3 +1) x 72Where:N = Total division ratioNM1 = Number of main divider cycles when prescaler modulus equals 64NM2 = Number of main divider cycles when prescaler modulus equals 65NM3 = Number of main divider cycles when prescaler modulus equals 72Example:Calculate NM1, NM2 and NM3 to Rx 944.150 MHzRx LO = 944.15 - 87.85 = 856.3 MHz (Synth Freq) (87.85 MHz IF with Low Side Injection)N = Rx LO ÷ FCM = 856.3 ÷ 0.05 = 17126 (FCM = Loop Reference Frequency)
PROGRAMMING3-3June 1997 Part No. 001-3492-001NM3 = (INT(64 x FRAC [N ÷ 64]) ÷ 8) - 1 = (INT(64 x 0.59375) ÷ 8) - 1= (INT(38 ÷ 8)) - 1= 4 - 1= 3NM2 = 8 x FRAC [N ÷ 8] = 8 x 0.75= 6NM1 = INTEGER [N ÷ 64] - NM2 - NM3 - 3= 267 - 6 - 3 - 3= 2553.2.7 TX / RX FREQUENCY SHIFT AND BAND SELECTIONAs mentioned in 3.2.2, in order to implement the band selection and Rx/Rx an additional 8 bits of data are added to each of the synthesizer load words (D/C/B/AO) (see Figure 3-1). The frequency bands and Transmit/Receive Bits are defined as follows:Low Band 928-944 MHzHigh Band >944 MHz to 960 MHzxx Don’t careLow+ Low Band Select (1=lowband, 0=highband)Low- Low Band Select (0=lowband, 1=highband)Tx+ Transmit Select (1=Tx mode, 0=Rx mode)Tx- Transmit Select (0=Tx mode, 1=Rx mode)Figure 3-2 D-WORD4321 141312111098765 2019181715 16 242322211 1 1 1 1 1 1 1 00/110000000000000ADDRESSBITS= 350 FOR 50 kHz REFERENCE EA (ALWAYS 1)FMOD (1 = MODULUS 8)SA (ALWAYS 00)EM (ALWAYS 1)SM (ALWAYS 00)LONG (0=24 BIT WORD)NR (REFERENCE DIVIDE)
PROGRAMMING3-4June 1997Part No. 001-3492-001 Figure 3-3 C-WORDFigure 3-4 B-WORDFigure 3-5 A0-WORD4321 141312111098765 2019181715 16 242322211 0 1 1 1 1 1 0 0000000000000010ADDRESSBITS= 437 FOR 50 kHz REFERENCE PA (ALWAYS 0)NA (AUXILIARY DIVIDE RATIO) (ALWAYS 0)4321 141312111098765 2019181715 16 242322211 0 000000000000ADDRESSBITS0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0 1NOT USED(ALWAYS 0000) (CHANNEL DEPENDENT)CK(CHARGE PUMP CURRENT SETTING)CN CLBINARY ACCELERATIONFACTOR (ALWAYS 000000)PR (PRESCALER TYPE) (10=MODULUS 3)4321 141312111098765 2019181715 16 24232221ADDRESSBITS0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/100/10/10/10/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1NM1(NUMBER OF MAIN DIVIDER CYCLES WHEN PRESCALER MODULUS = 64)NM20/10/10/1NF(NUMBER OF MAIN DIVIDER CYCLESWHEN PRESCALER MODULUS = 65)
PROGRAMMING3-5June 1997 Part No. 001-3492-001Figure 3-6 SERIAL INPUT WORD FORMAT241A0BCDE0NF NM1NM3 NM20 0 0 0 0 0 01 CN CK CL PRPR="10"0 01 1 NA PA 001 01 NR SM EM SA EAFMODLONG1 11 1 0 0 0 T1 T0 0ADDRESS BITS TEST BITS124NOTE: E-Word not used in Synthesizer load.Figure 3-7 DIAGNOSTIC SERIAL DATA STREAMXXXXXX XXXX A1 A0 Rng D7 D6 D5 D4 D3 D2 D1 D0 XXXXXX XXXX XXXX a0LSB (00)MSB (23)DataClockDiag En
PROGRAMMING3-6June 1997Part No. 001-3492-0013.2.8 RADIO DIAGNOSTICSThe diagnostic features allow the user to program a Digital-To-Analog Converter (DAC) to adjust RF output power and modulation flatness without remov-ing the radio from the enclosure. Bit "a0" can be set to provide an analog voltage representative of the for-ward and reverse RF power at the radio interface con-nector J201, pin 14. This feature can be used to moni-tor the condition of the transceiver and antenna/feedline. Figure 3-7 is a diagram of the Diagnostic Serial Data Stream with definitions of the bits. It is 19 bits long, the front (MSBs) can be padded with "Don’t Cares" (XXs) to get to 24 bits.Clock 1 MHz (max)Diag Enable 250 ns (min)XX Don’t CareDAC BitsA1-A0 = DAC Output Select00=Power Set Data=0x00 to 0xFF, RNG=101=Mod Adj Data=0x00 to 0xFF, RNG=111=DAC Control Select Data=0x00 to 0xFF, RNG=1RNG = Range Select (max output) (Ref=5.5V÷2)0 = 1 x Ref1 = 2 x RefD7-D0 = D/A Data0x00 = 0.0V0xFF = 1 x Ref (RNG=0)0xFF = 2 x Ref (RNG=1)Shift Register Bits:a0 = Diagnostic Select to J201, pin 14 (Analog Voltage)0 = Forward Power1 = Reverse Power3.3 RECEIVE TO TRANSMIT SEQUENCE1. Synthesizer is loaded (D, C, B and A0 words). Refer to Figure 3-8.2. The state of the RX_EN line does not have to be changed until the last bit is sent. However, Recieve 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 then the Synth Enable should be returned to a low state.4. After the last word is strobed in, 7 milliseconds (worst case) should elapse before TX_EN is turned ON. This allows the synthesizer to come within 1 kHz of the desired frequency.Figure 3-8 RX TO TX TIMING DIAGRAM"Ramp-Up" is the amount of time required for the transmitter to reach full power once the TX EN has been applied. The Ramp-Up circuitry (located on the transceiver) minimizes adjacent channel interfer-ence caused by spectral spreading (sinx/x) when the transmitter is keyed. The Ramp-Up time is approxi-mately 3 ms.3.4 TRANSMIT TO RECEIVE SEQUENCE1. TX_EN is turned OFF. This signal is shaped. Refer to Figure 3-9.2. The synthesizer load process could begin slightly before, but when the last bit is strobed in the synthe-sizer it will become unlocked.3. The RX_EN line should switch from low to high AFTER the TX_EN is switched. The RX_EN not only turns the RX circuits on but also Pin Shifts the VCO.D0D24D0 D24 D0 D24"D" WORD "B" WORD "A" WORDDATACLOCKt=0SPEEDUP RAMP-UPLOCKRX_ENSYNTH_EN9V TXTX_EN"C" WORD
PROGRAMMING3-7June 1997 Part No. 001-3492-0014. 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 syn-thesizer in the SPEEDUP mode has poor noise per-formance and would degrade the Receive performance.Figure 3-9 TX TO RX TIMING DIAGRAMSpeedup is 2 to 3 msLock is approximately 7 msRamp is approximately 3 msDekey is approximately 3 ms"Ramp-Down" is the amount of time required for the transmitter output power to be reduced before switching off the transmitter and enabling the receiver with the RX EN. The Ramp-Down circuitry (located on the transceiver) minimizes adjacent channel inter-ference caused by spectral spreading (sinx/x) when the transmitter un un-keyed. The Ramp-Down time is approximately 3 ms.D0D24D0 D24 D0 D24"D" WORD "B" WORD "A" WORDDATACLOCKt=0RAMP-DOWN SPEEDUPRX_ENSYNTH_EN9V TXTX_EN"C" WORD
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4-1June 1997 Part No. 001-3492-001SECTION 4 CIRCUIT DESCRIPTION4.1 GENERAL4.1.1 INTRODUCTIONThe main subassemblies of this transceiver are the RF board, VCO board, TCXO, Loader board or Modem. A block diagram of the transceiver is located in Figure 4-1. The 3492 is also available in Transmit only and Receive only models.The 3492 has a reference oscillator stability of ±1.5 PPM. The 17.5 MHz TCXO (Temperature Com-pensated Crystal Oscillator) is soldered directly to the RF board. The TCXO is not serviceable.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 87.85 MHz below the receive frequency. The fre-quency of this oscillator is controlled by a DC voltage produced by the phase detector in synthesizer chip U800.Channels are selected by programming counters in U800 to divide by a certain number. This program-ming is performed over a serial bus formed by the Synth Clock, Synth Enable, and Data pins of J201. This programming is performed by the Loader board, modem or user supplied hardware and software (see Section 3).The frequency stability of the synthesizer in both the receive and transmit modes is established by the stability of the TCXO. The TCXO is 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 87.85 MHz / 450 kHz. Bandpass filters reject the image, half IF, injection, and other unwanted frequencies. A four-pole crystal filter enhances receiver selectivity.4.1.4 TRANSMITTERThe transmitter produces a nominal RF power output of 5W at 13.3V DC, adjustable down to 1W. Frequency modulation of the transmit signal occurs in the synthesizer. Transmit audio processing circuitry is contained in the Loader board, modem or customer-supplied equipment.4.2 SYNTHESIZERProgramming 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.A block diagram of the synthesizer is shown in Figure 4-1 and a block diagram of Synthesizer IC U800 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 U800. 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.
CIRCUIT DESCRIPTION4-2June 1997Part No. 001-3492-001 Figure 4-1 TRANSCEIVER BLOCK DIAGRAM U230840.15-872.15 MHZ1st LO AMPRECEIVERTRANSMITTERSYNTHESIZERSEC LOCNTRLRSSICLOCKDATARX OUTDIAG ENDIAGTX ENRSSIRF INTESTQ24087.85 MHzZ220/Z221Q211Q260/Q261Z201Q200/Q201Z200Q500DRIVERU510Q520/U130CU520BU520ACR540/CR541Q911CLOCKDIAG ENU901U902AU902A U900DATARX OUTDIAG ENDIAGTX ENQ135U130A/B/DQ133/Q134U111Q110/U110RF ENR818Q841Q842Q843Q844Q845CTRL+9VLOWBAND +LOWBAND -SYNTH OUTMOD ADJUSTMOD INPUTT/R PS +T/R PS -Q820 Q821/Q822Q823U840Q840SYNTH DATAU800Q800+13.3VSYNTH ENLOCK DETQ132Q131Q130Y800RF AMP MIXER CRYSTAL FILTERANTENNASWITCHRX AUDIOVCOAMPLIFIERVCO BUFFER/RSSILOW-PASSFILTERRF OUTRF BPF RF BPF IF / 450 kHz FILTER2nd LO AMPAMPLIFIERTX INTCXO+13.3VPWR SETMOD ADJ+9V TXRX EN+13.3VSWITCHEDCLOCKV FWDV REV+9.6V+5.5V
CIRCUIT DESCRIPTION4-3June 1997 Part No. 001-3492-0014.2.1 VOLTAGE-CONTROLLED OSCILLATOROscillatorThe VCO is formed by Q820, several capacitors and varactor diodes, and ceramic resonator L826. It oscillates at the transmit frequency in transmit mode and first injection frequency in the receive mode (928-960 MHz in transmit and 840.150-872.150 MHz in receive).Biasing of Q820 is provided by R823, R824 and R826. An AC voltage divider formed by C844 and C845 initiates and maintains oscillation and also matches Q820 to the tank circuit. Resonator L826 is grounded at one end to provide shunt inductance to the tank circuit.Frequency Control and ModulationThe VCO frequency is controlled by a DC volt-age across varactor diode CR824. As voltage across a reverse-biased varactor diode increases, its capaci-tance decreases. The VCO frequency increases as the control voltage increases. The control line is isolated from tank circuit RF by choke L825. The amount of frequency change produced by CR824 is controlled by series capacitor C836.The VCO frequency is modulated with the trans-mit audio/data signal from J201, pin 6 is applied across varactor diode CR822 which varies the VCO frequency at an audio rate. Series capacitors C825/C824 couple the VCO to CR822. R821 provides a DC ground on the anodes of CR822/CR823, and isola-tion is provided by R820 and C826. C827 is an RF bypass.The DC voltage across CR823 provides compen-sation 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 CR824/CR825/CR826/CR827 gets lower). CR823 also bal-ances the modulation signals applied to the VCO and TCXO. The DAC can be used to adjust the VCO modulation sensitivity.The DC voltage applied across CR823 comes from the modulation adjust control R818 on the RF board. R820 applies a DC biasing voltage to CR822; C815 provides DC blocking. RF isolation is provided by C827, R822 and R817.4.2.2 VCO AND REFERENCE OSCILLATOR MODULATIONBoth the VCO and reference oscillator (TCXO) are modulated in order to achieve a flat frequency response. If only the VCO were modulated, the phase detector in U800 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 fre-quency is modulated, the VCO frequency would not change fast enough (especially at the higher audio fre-quencies). Modulating both VCO and reference oscil-lators produces a flat audio response. Potentiometer R818 sets the VCO modulation sensitivity so that it is equal to the reference oscillator modulation sensitivity.4.2.3 CASCADE AMPLIFIERS The output signal on the collector of Q820 is cou-pled by C846 to buffer amplifier Q821/Q822. This is a cascade amplifier which provides amplification and also isolation between the VCO and the stages which follow. The signal is capacitively coupled from the collector of Q822 to the base of Q821. The resistors in this circuit provide biasing and stabilization, and C852 and C854 are RF bypass capacitors.4.2.4 AMPLIFIERAmplifier Q823 provides amplification and isola-tion between the VCO, Receiver and Transmitter. C851 provides matching between the amplifiers. Bias for Q823 is provided by R840, R842 and R843. Inductor L833 and capacitor C860 provide impedance matching on the output.4.2.5 VOLTAGE FILTERQ845 on the RF board is a capacitance multiplier to provide filtering of the +9.6V supply to the VCO. R845 provides transistor bias and C842 provides the
CIRCUIT DESCRIPTION4-4June 1997Part No. 001-3492-001capacitance that is multiplied. If a noise pulse or other voltage change appears on the collector, the base volt-age does not change significantly because of C842. Therefore, base current does not change and transistor current remains constant. CR840 decreases the charge time of C842 when power is turned on. This shortens the start-up time of the VCO. C840 and C841 are RF decoupling capacitors.4.2.6 VCO FREQUENCY SHIFTThe VCO must be capable of producing frequen-cies from 840-960 MHz to produce the required receive injection and transmit frequencies. If this large of a shift was achieved by varying the VCO con-trol 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.The 928-960 MHz band is divided into two seg-ments, 928-944 MHz and 944-960 MHz. The band selection is controlled by shift register U840, digital transistors Q843/Q844 and pin diode CR820 on the VCO board.A frequency shift of 87.85 MHz is required to go from transmit to receive mode and visa versa. Trans-mit to receive frequency shift is accomplished by pro-gramming shift register U840 which drives the digital transistors Q841/Q842. In Transmit mode, Q841/Q842 forward bias pin diode CR821 which switches in an inductive transmission line in parallel with the VCO resonator causing the VCO frequency to increase. In Receive mode Q841/Q842 reverse bias CR821 which switches out the inductive transmission line and lowers the VCO frequency for the mixer injection.Figure 4-2 U800 SYNTHESIZER BLOCK DIAGRAMCLOCKDATASTROBEVssRFINRFIN64/65/72PRESCALER MAIN DIVIDERSEM FB 2 2 12 8PR NM1 NM3NM2FRACTIONALACCUMULATORPRESCALERMODULUSCONTROL3FMOD NF FBSERIAL INPUT + PROGRAM LATCHES VDDTESTINREFEM+EAREFERENCE DIVIDER +2 +2 +2MAINMAINPHASEDETECTORREFERENCESELECT2SMEMREFERENCESELECT2SASECONDARYPHASEDETECTOREA AUXILIARYINEAAUX12NR12NAPAAUXILIARY DIVIDERPRESCALER1/4NORMALOUTPUTCHARGEPUMPOUTPUTCHARGEPUMPSPEED-UPOUTPUTCHARGEPUMPINTEGRALOUTPUTCHARGEPUMPAUXILIARYCN8CL2CK42VSSAVDDALOCKPHARAPHIPHPRNRF
CIRCUIT DESCRIPTION4-5June 1997 Part No. 001-3492-0014.2.7 SYNTHESIZER INTEGRATED CIRCUIT (U800)IntroductionSynthesizer chip U800 is shown in Figure 4-2. This device contains the following circuits: R (refer-ence), Fractional-N, NM1, NM2 and NM3; phase and lock detectors, prescaler and counter programming circuitry. The basic operation was described in Sec-tion 4.2.1.Channel ProgrammingFrequencies are selected by programming the R, Fractional-N, NM1, NM2 and NM3 in U800 to divide by a certain number. These counters are programmed by Loader board or a user supplied programming cir-cuit. More information on programming is located in Section 3.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 oscilla-tor-derived frequency.The VCO frequency is divided by the internal prescaler and the main divider to produce the input to the phase detector.4.2.8 LOCK DETECTWhen the synthesizer is locked on frequency, the SYNTH LOCK output of U800, pin 18 (J201, pin 7) is 3V. When the synthesizer is unlocked, the output is a less than 1V. Lock is defined as a phase difference of less than 1 cycle of the TCXO.4.3 RECEIVER CIRCUIT DESCRIPTION4.3.1 CERAMIC FILTER, RF AMPLIFIERCapacitor C200 couples the receive signal from the antenna switch to ceramic filter Z200. (The antenna switch is described in Section 4.4.3.) Z200 is a bandpass filter that passes only a narrow band of fre-quencies to the receiver. This attenuates the image and other unwanted frequencies.Impedance matching between the Z200 and RF amplifier Q201 is provided by C201, C203 and L200. CR200 protects the base-emitter junction of Q201 from excessive negative voltages that may occur dur-ing high signal conditions. Q200 is a switched con-stant current source which provides a base bias for Q201. Q200 base bias is provided by R200/R201. Current flows through R202 so that the voltage across it equals the voltage across R200 (minus the base/emitter drop of Q200). In the transmit mode the receive +9.6V is removed and Q200 is off. This removes the bias from Q201 and disables the RF amplifier in transmit mode. This prevents noise and RF from being amplified by Q201 and fed back on the first injection line.Additional filtering of the receive signal is pro-vided by Z201. L201 and C206 provide impedance matching between Q201 and Z201. Resistor R205 is used to lower the Q of L201 to make it less frequency selective.4.3.2 MIXERFirst mixer Q211 mixes the receive frequency with the first injection frequency to produce the 87.85 MHz first IF. Since low-side injection is used, the injection frequency is 87.85 MHz below the receive frequency. The RF signal is coupled to the mixer through C211. L212 and C214 tune the mixer output to 87.85. R214 lowers the Q of L212.4.3.3 FIRST LO AMPLIFIERThe first injection frequency from the VCO is coupled to the First Local Oscillator (LO) amplifier Q260/Q261 through C266. L261/C265 match Q260 to the VCO. Q261 is a switched constant current source which provides a base bias for Q260. Q261 base bias is pro-vided by R264/R265. Current flows through R263 so that the voltage across it equals the voltage across R264 (minus the base/emitter drop of Q261). In the transmit mode the receive +9.6V is removed and Q261 is off. This removes the bias from Q260 and disables the First LO amplifier in transmit mode.
CIRCUIT DESCRIPTION4-6June 1997Part No. 001-3492-0014.3.4 CRYSTAL FILTER, FIRST IF SECTIONZ220 and Z221 form a 2-section, 4-pole crystal filter with a center frequency of 87.85 MHz and a -3 dB passband of 8 kHz (12.5 kHz BW) or 15 kHz (25 kHz BW). This filter establishes the receiver selectivity by attenuating the adjacent channel and other signals close to the receive frequency. C223, C224, and L221 adjust the coupling of the filter. L222, C226, C227 and R223 provide impedance matching between the filter and U230.4.3.5 SECOND LO/MIXER/DETECTOROscillator and MixerAs shown in Figure 4-3, U230 contains the sec-ond oscillator, second mixer, limiter, detector, and squelch circuitry. The control line from synthesizer U800 is on U230, pin 4. R250/C252/CR240 stabilize the base current of the oscillator control line. C243/C245 provide the feedback for the Colpitts oscillator. The 87.4 MHz output of the oscillator is on U230, pin 3 and is coupled to buffer Q240. Bias for Q240 is pro-vided by R242/R243/R245. The output of Q240 is coupled to the auxiliary input of U800, pin 10 to main-tain the control line. The 87.85 MHz IF signal is mixed with the 87.4 MHz second LO to produce the 450 kHz Second IF.Figure 4-3 U230 BLOCK DIAGRAMSecond IF FilterThe output of the internal double-balanced mixer is the difference between 87.85 MHz and 87.4 MHz which is 450 kHz. This 450 kHz signal is fed out on pin 20 and applied to second IF filters Z230 and Z231. These filters have passbands of 9 kHz (12.5 kHz BW), or 20 kHz (25 kHz BW) at the -6 dB points and are used to attenuate wideband noise.Limiter-AmplifierThe output of Z230/Z231 is applied to a limiter-amplifier circuit in U230. 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 the limiter. C233/C234 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 U230, pin 10 shifts the phase of one of the detector inputs 90° at 450 kHz (all other inputs are unshifted in phase). When modulation occurs, the fre-quency 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. L230 is tuned to provide maximum undistorted output from the detec-tor. R232 is used to lower the Q of L230. From the detector the audio and data signal is fed out on pin 8. The audio/data output of U230, pin 8 is applied to J201, pin 13.Audio/Data AmplifierThe audio/data output of U230, pin 8 is applied to J201, pin 13.Receive Signal Strength Indicator (RSSI)U230, pin 5 is an output for the RSSI circuit which provides a voltage proportional to the strength of the 450 kHz IF signal. The RSSI voltage is applied to J201, pin 12.124MIXER5151411RSSI87.85 MHzC228C23720OSCILLATOR87.4 MHz+-RSSI OUTPUT9VREG6VCC78+-10QUADAUDIO OUTPUTL23012133CONTROLLIMITER INLIMITERIF AMP OUTIF DEC1IF DEC2IF AMP INMIXER OUTLIMITER DEC1LIMITER DEC2LIMITER OUTIF AMP16171819RSSI FBAUDIO FB
CIRCUIT DESCRIPTION4-7June 1997 Part No. 001-3492-0014.4 TRANSMITTER CIRCUIT DESCRIPTION4.4.1 DRIVERThe VCO RF output signal is applied to R846, R847 and R848 that form a resistive splitter for the receive first local oscillator and the transmitter. The VCO signal is then applied to a 50 ohm pad formed by R500, R501, and R502. This pad provides attenuation and isolation. Q500 provides amplification and addi-tional isolation between the VCO and transmitter. Biasing for this stage is provided by R503 and R504, and decoupling of RF signals is provided by C504. Impedance matching to the power amplifier is pro-vided by L500/C505.4.4.2 FINAL, COMPARATORRF module U510 has an RF output of 1 to 5W and operates on an input voltage from 10-16V.Power control is provided by U520, U130, Q520 and a stripline directional coupler. The power is adjusted by Power Set Control of U900 that provides a reference voltage to U130C. U130C drives Q520 and PA module U510 when using the DAC. When not using the DAC, the set voltage is applied through U902, pin 2. One end of the stripline directional coupler is connected to a forward RF peak detector formed by R535, CR530, C531 and U520A. The other end of the stripline directional coupler is connected to a reverse RF peak detector formed by R537, CR531, C534 and U520B. If the power output of U510 decreases due to temperature variations, etc., the forward peak detector voltage drops. This detector voltage drop is buffered by U520A and applied to inverting amplifier U130C which increases the forward bias on Q520. The increase on Q520 increases the power output level of U510. If the power output of U510 increases, the for-ward peak detector voltage increases and U130C decreases the forward bias on Q520. The decrease on Q520 decreases the output power of U510.The output of CR530 and CR531 are fed to U520A/B respectively. If the output of either buffer increases, the increase is applied to the inverting input of U130C. The output of U130C then decreases and Q520 decreases the input voltage to U510 to lower the power. The control voltage is isolated from RF by fer-rite bead EP510 and C511 decouples RF.The forward/reverse power voltages from U520A/B are also applied to U901 for Diagnostic out-puts on J201, pin 14.The low-pass filter consists of C541, L540, C542, L541, C543, L542 and C544. The filter attenu-ates spurious frequencies occurring above the transmit frequency band. The transmit signal is then fed through the antenna switch to antenna jack J501.4.4.3 ANTENNA SWITCHThe antenna switching circuit switches the antenna to the receiver in the receive mode and the transmitter in the transmit mode. In the transmit mode, +9V is applied to L543 and current flows through diode CR540, L544, diode CR541, and R540. 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 CR540 is forward biased, the transmit signal has a low-impedance path to the antenna through coupling capacitor C546.L544 and C552 form a discrete quarter- wave line. When CR541 is forward biased, this quarter-wave line is effectively AC grounded on one end by C552. 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 sig-nal from the receiver. C545/C546 matches the antenna to 50 ohms in transmit and receive.4.4.4 TRANSMIT KEY-UP CONTROLWhen 3-16V is applied to J201, pin 3 (TX_EN) is applied to the base of Q133 it turns the transistor on and causes the collector to go low. This low is on the base of Q134 and turns the transistor on to apply +5.5V to U130A, pin 2. C130 and C131 decouple RF. The +5.5V from Q134 is divided by R132/R133 to produce a +3.6V reference on U130A, pin 3. C136, C137, C138 and C139 provide RF decoupling.
CIRCUIT DESCRIPTION4-8June 1997Part No. 001-3492-001Q130, Q131 and Q132 act as switches that turn on with the RX_EN line. When J201, pin 4 goes low, Q130 is turned off, which turns on Q131 that turns on Q132. This applies +13.3V to U130 before the TX_EN line on J201, pin 3 goes high.U130B provides the key-up/key-down condition-ing circuit. C141/R137 provide a ramp up/ramp down of the +9V TX during key-up/key-down which reduces load pull of the VCO during key-up. The output on U130B, pin 7 is applied to the non-inverting input of comparator U130D, pin 12. The output of U130D, pin 14 is applied to the base of cur-rent source Q135. The output of Q135 is on the emit-ter and is applied back to the inverting input of com-parator U130D, pin 13. A decrease or increase at U130D, pin 13 causes a correction by U130D to stabi-lize the +9V transmit output. R140/R141 establishes the reference voltage on U130D, pin 13. C144 pro-vides RF bypass, C143 provides RF decoupling and C145 stabilizes the output. The +9V transmit voltage is then distributed to the circuits.4.5 VOLTAGE REGULATORS4.5.1 +9.6 AND +5.5V REGULATEDThe +3-16V applied on J201, pin 5 is applied to the base of Q110 turning the transistor on. This causes the collector to go low and applies a low to the control line of U110, pin 2 and R110 provides supply voltage isolation. The +13.3V from J201, pin 2 is on U110, pin 6 to produce a +5.5V reference output on U110, pin 4. C110 stabilizes the voltage and C114/C111 provide RF decoupling. C117 provides RF bypass and C123 provides RF decoupling. C119 helps to stabilize the voltage when the +5.5V supply first turned on.The low from the collector of Q110 is also applied to the control line of U111, pin 2. The +13.3V from J201, pin 2 is on U111, pin 6 to produce a +9.6V output on U111, pin 4. C118 provides RF bypass and C122 provides RF decoupling. C120 helps to stabilize the voltage when the +9.6V supply first turned on.
5-1June 1997 Part No. 001-3492-001SECTION 5 SERVICING5.1 GENERAL5.1.1 PERIODIC CHECKSThis transceiver should be put on a regular main-tenance schedule and an accurate performance record maintained. Important checks are receiver sensitivity and transmitter frequency, modulation, and power out-put. A procedure for these and other tests is located in Section 6. It is recommended that transceiver perfor-mance 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 com-ponent 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 COMPO-NENT LAYOUTSSchematic diagrams and component layouts of the PC boards used in this transceiver are located in Section 8. A component locator guide is also pro-vided 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 alphanumerically according to designator. For infor-mation on ordering parts, refer to Section 1.8.5.1.5 TCXO MODULE NOT SERVICEABLEThe ±1.5 PPM TCXO module is not field ser-viceable. 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, U800, pin 18 goes low (0V). NOTE: The user-supplied circuitry must disable the transmitter and receiver when an out-of-lock condi-tion is indicated.When the VCO is unlocked, the fR and fV inputs to the phase detector are usually not in phase (see Sec-tion 4.1.2). The phase detector in U800 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 Q820, amplifier Q821/Q822, and the RF IN of U800. 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 fre-quencies 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 U800, pin 8. It should be 17.5 MHz at a level of approximately 0.5V 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 Q823 can be measured with an RF voltmeter or some other type of high impedance meter. The minimum level after a power splitter at R846 should be -3 dBm.
SERVICING5-2June 1997Part No. 001-3492-001Control 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 R841. 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 (U800)Lock DetectorWhen the VCO is locked on frequency, the lock detect output on J201, pin 7 should be high.5.3 RECEIVER SERVICINGTo isolate a receiver problem to a specific sec-tion, 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 - 3-16V DC Receive Pin 5 - 3-16V DCPlace a DC ammeter in the supply line to the transceiver and the following maximum currents should be measured: Pin 4 - 400 µA Pin 5 - 400 µA5.3.2 MIXER/DETECTORData OutputUsing a .01 µF coupling capacitor, inject a 87.85 MHz, 1 mV signal, modulated with 1 kHz at ±3 kHz deviation (for 25 kHz radios) ±1.5 kHz (for 12.5 kHz radios) at U230, pin 1. The signal output at U230, pin 8 should be approximately 150 mV P-P.NOTE: This signal consists of the 1 kHz modulation and harmonics of 450 kHz.RSSI OutputThe RSSI output on J201, pin 12 should be <900 mV DC with no signal applied, and >1.8V DC with a 1 mV input signal.Figure 5-1 RECEIVER SERVICING STARTMEASURE CURRENTOK?OK?NOYESYESNOREFER TO SECTION 5.3.2CHECK FUSES ANDWIRE HARNESS CONNECTIONSREFER TO SECTION 5.3AND VOLTAGESCHECK DATAOUTPUTREFER TO SECTION 5.3.2CHECKCHECK AUDIOOK?YESNOOK?YESNOCHECK MIXER/DETECT CIRCUITU230CIRCUIT REFER TO SECTION 5.3.4REFER TO SECTION 5.3.3REPLACE DEFECTIVECOMPONENTREFER TO SECTION 5.3.5CHECK BUFFERSCRYSTAL FILTERSREPAIR DEFECTIVESTAGECHECK RF AMPFIRST MIXER REFER TO SECTION 5.3.6
SERVICING5-3June 1997 Part No. 001-3492-0015.3.3 SECOND LOVerify that the Second LO signal is present at R245. The Second LO should be at 87.40 MHz and not less than 250 mV P-P.5.3.4 AUDIO BUFFER AMPThe Data output on J201, pin 13 should be 100-200 mV RMS, with the preceding injection signal. If these levels are not correct, verify proper adjustment of L230 (see Section 6.7). The gain of U230 is 2.8 for 25 kHz radios and 5.8 for 12.5 kHz radios.5.3.5 CRYSTAL FILTERSThe 87.85 MHz IF signal is provided to the crys-tal filters Z220/Z221.5.3.6 MIXERThe mixer converts the RF signal (928-960 MHz) to 87.85 MHz. The Local Oscillator is provided by the VCO and Q260/Q261. The level of the LO should be approximately +3 dBm.5.3.7 LOW NOISE AMPLIFIER (LNA)The LNA provides approximately 12 dB of gain at 928-960 MHz. Q200 provides active bias to Q201.5.3.8 ANTENNA SWITCHCR540, CR541, L544, C551 and C552 form a Pi-network antenna switch. CR540 and CR541 are reversed biased in Receive Mode.5.4 TRANSMITTER SERVICING5.4.1 SUPPLY VOLTAGES AND CURRENTMeasure the supply voltages on the following pins of interface connector J201: Pin 2 - 13.3V DC nominal Pin 3 - 3-16V DC Pin 4 - 0.0V DC (while transmitting) Pin 5 - 3-16V DC Pin 6 - 2.5V DC ±1%/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 - 2.5A maximum Pin 3 - 400 µA Pin 5 - 400 µA5.4.2 VCO1. Check VCO after power splitter for power output. (Power output should be at least -3 dBm.)2. Check 9V Transmit (Q135, emitter). 3. If 9V is not present check Q133/Q134, U130, Q135, Q130, Q131 and Q132 (see Section 4.4.4).4. Check voltages on Driver Q500.Input = 1.5V DCOutput = 3.5V DCPower output should be at least 2 mW (+3 dBm) at C506 (50 ohm point).5.4.3 FINAL AMPLIFIER1. Check the voltages on U510.Pin 2 = 9V DC Pin 3 = 5.0V DC (varies with power setting)Pin 4 = 13.3V DCPower output at C540 should be 7.5-8.0W (+38.7 to +39 dBm).5.4.4 ANTENNA SWITCH1. Check the antenna switch voltages.CR540 = 8.6V DCCR541 = 8.0V DCThe loss through the Antenna Switch should be 1.9 to 2.1 dB.
SERVICING5-4June 1997Part No. 001-3492-0015.4.5 MODULATION INPUT1. Check for audio/data signals at J201, pin 6, Y800, pin 1 and A840, pin 3.5.4.6 TCXO1. Check Y800, pin 1 for 2.5V DC ±1%.2. Adjust Y800 to set the transmitter to the frequency of operation.3. If the frequency cannot be set to the frequency of operation, replace the TCXO.Figure 5-2 TRANSMITTER SERVICINGSTARTMEASURECURRENT ANDOK?NOYESMEASURE RFWATTS?CHECK DEVIATIONTRANSMITTEROKOK?OK?NONONOYESYESYESWIRE HARNESS CONNECTIONSCHECK FUSES ANDCHECK AUDIOCHECK TCXOADJUST ORCHANGE TCXOOFF FREQ5VOLTAGESOUTPUT POWER(SECTION 5.4.6)CIRCUITSCHECK FREQUENCY(SECTION 5.4.7)Y800CHECK Q500CHECK DRIVEROK?NOYESCHECK A840REFER TOSECTION 5.4.2OK?NOYESREFER TO CHECKPOWER MODULESECTION 5.4.4CHECK U510OK?NOREFER TO CHECKANTENNA SWITCHSECTION 5.4.5CHECKCR540/541
6-1June 1997 Part No. 001-3492-001SECTION 6 ALIGNMENT PROCEDURE6.1 GENERALReceiver or transmitter alignment may be neces-sary if repairs are made that could affect tuning. Alignment points diagrams are located in Figure 6-5 or component layouts are located in Section 8.Fabricate test cables by referring to Figure 2-1. This cable should include power and ground, a trans-mit 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 TEST EQUIPMENTlModulation Analyzer, HP8901 or equivalentlRF Signal Generator, HP8656 or equivalentlFrequency Counter and "sniffer" probelPower MeterlOscilloscopelDigital Multimeterl20 dB AttenuatorlPower Supply, HP8264A or equivalentlAudio Analyzer, HP8903A or equivalentlMisc. cables, connectors, attenuators.l6.3 INITIAL SETTINGS1. Adjust power supply voltage to +13.3V DC.2. Turn off the power supply.3. Connect RF and power cables.4. Turn on the power supply.5. Using a DC voltmeter, monitor the DC voltage at the junction of R812/R814 (wiper of R814), refer to Figure 6-5.6. Adjust R814 to 2.1V DC ±0.05V.7. Verify the bias voltage at J201, pin 6 is +2.5V DC ±0.05V.6.4 VCO CONTROL VOLTAGE1. Connect the test setup shown in Figure 6-1. 2. Adjust R525 fully counterclockwise.3. Load the synthesizer with the HIGHEST channel frequency in the band.4. Key the transmitter.5. Verify the voltage at TP800 is < 5V DC.6. Unkey the transmitter.7. Load the synthesizer with the LOWEST channel frequency in the band.8. Key the transmitter.9. Verify the voltage at TP800 is > 1V DC.10.Unkey the transmitter.6.5 TRANSMITTER AND FREQUENCYNOTE: If the radio is intended to use Diagnostics or is a Radio/Loader board combination go to Section 6.6.1. Connect the test setup shown in Figure 6-1. 2. Load the synthesizer with a channel frequency in the MIDDLE of the band.3. Key the transmitter.4. The voltage at J201, pin 2 should be 13.3V DC.(Do not transmit for extended periods.)5. Adjust R525 clockwise for 5.0W ±1W. Adjust volt-age and power if necessary.6. Check the power at a channel frequency on the LOW and HIGH ends of the band. The power out-put should be 4-6W with current less than 2.5A.
ALIGNMENT PROCEDURE6-2June 1997Part No. 001-3492-0016.5.1 MODULATION ALIGNMENT1. Apply a 1V, 100 Hz square-wave to 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. Preset R818 to the center position.4. Load the synthesizer with a channel frequency at the MIDDLE of the band.5. Adjust R818 for a flat square wave.6. Apply a 100 Hz sine-wave to J201, pin 6. The mod-ulation analyzer should still have the 15 kHz low-pass filter selected.7. Adjust the audio analyzer output level to achieve a transmit deviation of:1.5 kHz for 12.5 kHz BW radios3.0 kHz for 25 kHz BW radios8. Load the synthesizer with a channel frequency at the LOW end of the band.9. Input a 100 Hz sine-wave and set a 0 dB reference on the Modulation Analyzer.10.Apply a 1 kHz sine-wave. The level should be within ±2 dB of the reference at 100 Hz.11.Load the synthesizer with a channel frequency in the MIDDLE of the band.12.Input a 100 Hz sine-wave and set a 0 dB reference on the Modulation Analyzer.13.Apply a 1 kHz sine-wave. The level should be within ±2 dB of the reference at 100 Hz.14.Load the synthesizer with a channel frequency in the HIGH end of the band.15.Input a 100 Hz sine-wave and set a 0 dB reference on the Modulation Analyzer.16.Apply a 1 kHz sine-wave. The level should be within ±2 dB of the reference at 100 Hz.17.Unkey the transmitter.Figure 6-1 TRANSMITTER TEST SETUP6.6 TRANSMITTER/FREQUENCY WITH LOADERNOTE: If the radio is not intended to use Diagnostics go to Section 6.5.NOTE: Subtract the current drawn by the Test Loader or any Interface Units from all measurements.1. Set the Diagnostic Enable DAC (DAC4) to 255, (FFh).2. Select a Transmit channel frequency in the MID-DLE of the band. Make sure voltage at J201, pin 2 is 13.3V DC.3. Adjust R535 fully clockwise for maximum power output.4. Adjust the Power Adjust DAC setting (DAC1) to set the power output to 5W ±0.3W. Make sure volt-age at J201, pin 2 is 13.3V DC.5. Adjust voltage and power if necessary.POWER SUPPLY+7.5V DCTXRXVOLTMETERDC+-WATTMETER5W, 50 OHMDUMMY LOADCOMMUNICATIONSSERVICE MONITOR0-1.5ADC AMMETER+-ANALYZERMODULATION
ALIGNMENT PROCEDURE6-3June 1997 Part No. 001-3492-0016. Repeat Step 5 for channels on the LOW and HIGH ends of the band.7. Power output should be 4.7-5.3W (50% duty cycle) and current should be less than 2.5A.8. Select a Transmit channel frequency in the MID-DLE of the band9. Adjust the frequency displayed on the Modulation Analyzer to the desired channel frequency by adjusting the TCXO (Y801).6.6.1 MODULATION ADJUSTMENT1. Apply a 1V, 100 Hz square wave to J201, pin 6.2. Transmit into the modulation analyzer and observe modulation output on the oscilloscope. The modu-lation analyzer should not have any high pass filter-ing selected and no less than a 15 kHz low pass filter.3. Select a Transmit channel frequency in the MID-DLE of the band. The DAC value should be "125". 4. If the square wave is peaked on the edges, adjust R818 down in value for the flattest square wave.5. Repeat Steps 3 and 4 for channels on the LOW and HIGH ends of the band.6. Input a 100 Hz sinewave to J201, pin 6. The mod-ulation analyzer should still have the 15 kHz low pass filter selected.7. Adjust the audio analyzer output level to achieve a transmit deviation of:1.5 kHz for 12.5 kHz radios or 3 kHz for 25 kHz radios.8. Select a Transmit channel frequency at the LOW end of the band.9. Input a 100 Hz sine-wave and set a 0 dB reference on the Modulation Analyzer.10.Apply a 1 kHz sine-wave. The level should be within ±2 dB of the reference at 100 Hz.11.Select a Transmit channel frequency in the MID-DLE of the band.12.Input a 100 Hz sine-wave and set a 0 dB reference on the Modulation Analyzer.13.Apply a 1 kHz sine-wave. The level should be within ±2 dB of the reference at 100 Hz.14. Select a Transmit channel frequency in the HIGH end of the band.15.Input a 100 Hz sine-wave and set a 0 dB reference on the Modulation Analyzer.16.Apply a 1 kHz sine-wave. The level should be within ±2 dB of the reference at 100 Hz.17.Unkey the transmitter.Figure 6-2 TX WITH LOADER TEST SETUP6.7 RECEIVERC A U T I O NDo not key the transmitter with the generator con-nected because severe generator damage may result.NOTE: All distortion and SINAD measurements are performed with psophometric audio filtering.1. Connect the test setup shown in Figure 6-3. 2. Preset tuning slugs of L212 and L222 flush with the top of the can.3. Preset C223 to the center position (slot in-line with axis of the part).4. Re-adjust L212 and L222 clockwise 2 turns.POWER SUPPLY+7.5V DC+-COMMUNICATIONSSERVICE MONITOROSCILLOSCOPE WATTMETER5W, 50 OHMDUMMY LOADTESTCABLEJ201 J102J104
ALIGNMENT PROCEDURE6-4June 1997Part No. 001-3492-0015. Load the synthesizer with a receive channel fre-quency at the MIDDLE of the band.6. Apply a -47 dBm signal from the RF signal genertor to J501 on the radio. Adjust deviation for:1.5 kHz with 1 kHz tone for 12.5 kHz radios3 kHz with 1 kHz tone for 25 kHz radios.NOTE: Maintain these deviation levels throughout the test when measuring AC levels, SINAD and % distor-tion, unless otherwise instructed.7. Preset L230 for 2.5V DC ±0.05V at J201, pin 13.8. Set RF signal generator to -105 dBm, unmodulated.9. Set generator frequency to :3 kHz below channel center on 12.5 kHz radios5 kHz below channel center on 25 kHz radios10.Adjust C223 (first) and L212 for peak RSSI voltage.(Use 2V scale on DVM.)11.Apply a -47 dBm signal from the RF signal genera-tor to J501 on the radio with standard deviation lev-els.12.Adjust L222 for minimum distortion (psophometri-cally weighted).13.Set RF signal generator to -105 dBm, unmodulated.14.Adjust L212 for peak RSSI voltage. (Use 2V scale on DVM.)15.Apply a -47 dBm signal from the RF signal genera-tor to J501 on the radio with standard deviation lev-els.16.Adjust L230 for maximum receive audio voltage.17.Verify that the receive audio RMS voltage is 150 mV ±50 mV.18.Verify that the receive audio DC voltage is 2.5V ±0.3V.19.Measure the % distortion (spec is <3% psophometrically weighted).20.Adjust the amplitude of the RF signal generator on J501 until an 12 dB SINAD level (psophometrically weighted) is reached.21.Measure the 12 dB SINAD sensitivity. The RF input level should be less than -116 dBm (0.35 µV).Figure 6-3 RECEIVER TEST SETUP22.Load the synthesizer with a receive channel fre-quency to the LOW end of the band.23.Verify the RF generator amplitude level is less than -116 dBm at 12 dB SINAD.24.Load the synthesizer with a receive channel fre-quency to the HIGH end of the band.25.Verify the RF generator amplitude level is less than -116 dBm at 12 dB SINAD.26.Adjust generator RF level to -120 dBm and measure DC (RSSI) voltage on J201, pin 12 of the radio (spec is less than or equal to 0.90V DC).27.Adjust generator RF level to -120 dBm and measure DC (RSSI) voltage on J201, pin 12 of the radio(spec is less than or equal to 0.8V DC).28.Adjust generator RF level to -60 dBm and measure DC (RSSI) voltage on J201, pin 12 of the radio(spec is greater than or equal to 1.7V DC).POWER SUPPLYTXRXVOLTMETERDC+-COMMUNICATIONSSERVICE MONITORDC AMMETER+-ANALYZERMODULATION+13.3V DC 0-3A
ALIGNMENT PROCEDURE6-5June 1997 Part No. 001-3492-001Figure 6-4 Rx WITH LOADER TEST SETUPPOWER SUPPLY+7.5V DC+-COMMUNICATIONSSERVICE MONITOROSCILLOSCOPETESTCABLEJ201 J102J104Figure 6-5 ALIGNMENT POINTS DIAGRAMR540J501A840TP800Y800R818R814R525Z231 Z230L230J20114 1L212 L222C223U510
7-1June 1997 Part No. 001-3492-001SECTION 7 PARTS LISTSYMBOL PARTNUMBER DESCRIPTION NUMBER3492 TRANSCEIVERPART NO. 242-3492-510 (12.5 kHz)PART NO. 242-3492-530 ( 25 kHz )A 840 VCO 928-960 MHz 023-3492-540C 100 22 pF ±5% NPO 0603 510-3674-220C 101 1 µF 16V SMD tantalum 510-2625-109C 110 1 µF 16V SMD tantalum 510-2625-109C 111 22 pF ±5% NPO 0603 510-3674-220C 112 1 µF 16V SMD tantalum 510-2625-109C 113 22 pF ±5% NPO 0603 510-3674-220C 114 22 pF ±5% NPO 0603 510-3674-220C 115 .01 µF ±10% X7R 0603 510-3675-103C 116 .01 µF ±10% X7R 0603 510-3675-103C 117 .01 µF ±10% X7R 0603 510-3675-103C 118 .01 µF ±10% X7R 0603 510-3675-103C 119 1 µF 16V SMD tantalum 510-2625-109C 120 1 µF 16V SMD tantalum 510-2625-109C 122 22 pF ±5% NPO 0603 510-3674-220C 123 22 pF ±5% NPO 0603 510-3674-220C 130 22 pF ±5% NPO 0603 510-3674-220C 131 22 pF ±5% NPO 0603 510-3674-220C 132 1 µF 16V SMD tantalum 510-2625-109C 133 .01 µF ±10% X7R 0603 510-3675-103C 134 1 µF 16V SMD tantalum 510-2625-109C 135 22 pF ±5% NPO 0603 510-3674-220C 136 22 pF ±5% NPO 0603 510-3674-220C 137 .01 µF ±10% X7R 0603 510-3675-103C 138 22 pF ±5% NPO 0603 510-3674-220C 139 .1 µF ±5% X7R 1206 510-3609-104C 140 .01 µF ±10% X7R 0603 510-3675-103C 141 .0082 ±10% X7R 0805 510-3605-882C 142 22 pF ±5% NPO 0603 510-3674-220C 143 .01 µF ±10% X7R 0603 510-3675-103C 144 22 pF ±5% NPO 0603 510-3674-220C 145 1 µF 16V SMD tantalum 510-2625-109C 146 22 pF ±5% NPO 0603 510-3674-220C 170 22 pF ±5% NPO 0603 510-3674-220C 171 22 pF ±5% NPO 0603 510-3674-220C 172 22 pF ±5% NPO 0603 510-3674-220C 173 22 pF ±5% NPO 0603 510-3674-220C 174 22 pF ±5% NPO 0603 510-3674-220C 175 22 pF ±5% NPO 0603 510-3674-220SYMBOL PARTNUMBER DESCRIPTION NUMBERC 176 22 pF ±5% NPO 0603 510-3674-220C 177 22 pF ±5% NPO 0603 510-3674-220C 178 22 pF ±5% NPO 0603 510-3674-220C 179 22 pF ±5% NPO 0603 510-3674-220C 180 22 pF ±5% NPO 0603 510-3674-220C 181 22 pF ±5% NPO 0603 510-3674-220C 182 22 pF ±5% NPO 0603 510-3674-220C 200 22 pF ±5% NPO 0603 510-3674-220C 201 22 pF ±5% NPO 0603 510-3674-220C 202 .01 µF ±10% X7R 0603 510-3675-103C 203 3.3 pF ±0.1pF NPO 0603 510-3673-339C 204 .01 µF ±10% X7R 0603 510-3675-103C 206 2.2 pF ±0.1pF NPO 0603 510-3673-229C 207 22 pF ±5% NPO 0603 510-3674-220C 210 .01 µF ±10% X7R 0603 510-3675-103C 211 22 pF ±5% NPO 0603 510-3674-220C 213 2.2 pF ±0.1pF NPO 0603 510-3673-229C 214 9.1 pF ±0.1pF NPO 0603 510-3673-919C 217 .01 µF ±10% X7R 0603 510-3675-103C 218 22 pF ±5% NPO 0603 510-3674-220C 219 22 pF ±5% NPO 0603 510-3674-220C 220 .01 µF ±10% X7R 0603 510-3675-103C 223 1.5-5 pF SMD ceramic 512-1602-001C 224 2.4 pF ±0.1pF NPO 0603 510-3673-249C 225 .01 µF ±10% X7R 0603 510-3675-103C 226 6.2 pF ±0.1pF NPO 0603 510-3673-629C 227 10 pF ±0.1pF NPO 0603 510-3673-100C 228 .01 µF ±10% X7R 0603 510-3675-103C 230 .01 µF ±10% X7R 0603 510-3675-103C 231 .01 µF ±10% X7R 0603 510-3675-103C 232 .01 µF ±10% X7R 0603 510-3675-103C 233 .01 µF ±10% X7R 0603 510-3675-103C 234 .01 µF ±10% X7R 0603 510-3675-103C 235 10 pF ±0.1pF NPO 0603 510-3673-100C 236 .01 µF ±10% X7R 0603 510-3675-103C 237 .01 µF ±10% X7R 0603 510-3675-103C 240 47 µF 10V SMD tantalum 510-2624-470C 241 .01 µF ±10% X7R 0603 510-3675-103C 242 22 pF ±5% NPO 0603 510-3674-220C 243 18 pF ±5% NPO 0603 510-3674-180C 244 .001 µF ±10% X7R 0603 510-3675-102C 245 15 pF ±5% NPO 0603 510-3674-150C 246 .01 µF ±10% X7R 0603 510-3675-103C 248 .001 µF ±10% X7R 0603 510-3675-102
PARTS LIST7-2June 1997Part No. 001-3492-001SYMBOL PARTNUMBER DESCRIPTION NUMBERC 249 .1 µF ±5% X7R 1206 510-3609-104C 250 .01 µF ±10% X7R 0603 510-3675-103C 251 .01 µF ±10% X7R 0603 510-3675-103C 252 1 µF 16V SMD tantalum 510-2625-109C 253 .01 µF ±10% X7R 0603 510-3675-103C 261 22 pF ±5% NPO 0603 510-3674-220C 262 22 pF ±5% NPO 0603 510-3674-220C 263 22 pF ±5% NPO 0603 510-3674-220C 264 .01 µF ±10% X7R 0603 510-3675-103C 265 5.6 pF ±0.1pF NPO 0603 510-3673-569C 266 22 pF ±5% NPO 0603 510-3674-220C 267 22 pF ±5% NPO 0603 510-3674-220C 268 22 pF ±5% NPO 0603 510-3674-220C 269 .01 µF ±10% X7R 0603 510-3675-103C 270 1.8 pF ±0.1pF NPO 0603 510-3673-189C 500 22 pF ±5% NPO 0603 510-3674-220C 501 .01 µF ±10% X7R 0603 510-3675-103C 502 68 pF ±5% NPO 0603 510-3674-680C 503 10 pF ±0.1pF NPO 0603 510-3673-100C 504 22 pF ±5% NPO 0603 510-3674-220C 505 22 pF ±5% NPO 0603 510-3674-220C 506 22 pF ±5% NPO 0603 510-3674-220C 510 22 pF ±5% NPO 0603 510-3674-220C 511 22 pF ±5% NPO 0603 510-3674-220C 512 22 pF ±5% NPO 0603 510-3674-220C 513 22 pF ±5% NPO 0603 510-3674-220C 514 1 µF 16V SMD tantalum 510-2625-109C 515 22 pF ±5% NPO 0603 510-3674-220C 516 1 µF 16V SMD tantalum 510-2625-109C 517 1 µF 16V SMD tantalum 510-2625-109C 518 22 pF ±5% NPO 0603 510-3674-220C 520 .01 µF ±10% X7R 0603 510-3675-103C 521 22 pF ±5% NPO 0603 510-3674-220C 522 22 pF ±5% NPO 0603 510-3674-220C 523 .01 µF ±10% X7R 0603 510-3675-103C 524 22 pF ±5% NPO 0603 510-3674-220C 526 .01 µF ±10% X7R 0603 510-3675-103C 527 22 pF ±5% NPO 0603 510-3674-220C 528 22 pF ±5% NPO 0603 510-3674-220C 529 22 pF ±5% NPO 0603 510-3674-220C 530 .01 µF ±10% X7R 0603 510-3675-103C 531 10 pF ±0.1pF NPO 0603 510-3673-100C 533 .01 µF ±10% X7R 0603 510-3675-103C 534 10 pF ±0.1pF NPO 0603 510-3673-100C 540 22 pF ±5% NPO 0603 510-3674-220C 541 6.2 pF ±5% NPO 0805 510-3601-629C 542 4.3 pF ±5% NPO 0805 510-3601-439SYMBOL PARTNUMBER DESCRIPTION NUMBERC 543 3.9 pF ±5% NPO 0805 510-3601-399C 544 3.3 pF ±5% NPO 0805 510-3601-339C 545 2.7 pF ±5% NPO 0805 510-3601-279C 546 22 pF ±5% NPO 0603 510-3674-220C 547 22 pF ±5% NPO 0603 510-3674-220C 548 68 pF ±5% NPO 0603 510-3674-680C 549 .01 µF ±10% X7R 0603 510-3675-103C 550 10 pF ±0.1pF NPO 0603 510-3673-100C 551 2.4 pF ±5% NPO 0805 510-3601-249C 552 10 pF ±0.1pF NPO 0603 510-3673-100C 800 .01 µF ±10% X7R 0603 510-3675-103C 801 22 pF ±5% NPO 0603 510-3674-220C 802 .01 µF ±10% X7R 0603 510-3675-103C 803 22 pF ±5% NPO 0603 510-3674-220C 804 .01 µF ±10% X7R 0603 510-3675-103C 805 .01 µF ±10% X7R 0603 510-3675-103C 806 .01 µF ±10% X7R 0603 510-3675-103C 807 22 pF ±5% NPO 0603 510-3674-220C 808 1.5 pF ±5% NPO 0603 510-3674-159C 809 2.7 pF ±0.1pF NPO 0603 510-3673-279C 810 22 pF ±5% NPO 0603 510-3674-220C 811 22 pF ±5% NPO 0603 510-3674-220C 812 22 pF ±5% NPO 0603 510-3674-220C 813 22 pF ±5% NPO 0603 510-3674-220C 814 22 pF ±5% NPO 0603 510-3674-220C 815 1 µF 16V SMD tantalum 510-2625-109C 816 22 pF ±5% NPO 0603 510-3674-220C 817 100 pF ±5% NPO 0603 510-3674-101C 818 .039 µF ±5% X7R 1206 510-3609-393C 819 .0039 µF ±10% X7R 0805 510-3605-392C 820 .0039 µF ±10% X7R 0805 510-3605-392C 821 1 µF 16V SMD tantalum 510-2625-109C 822 22 pF ±5% NPO 0603 510-3674-220C 823 10 pF ±0.1pF NPO 0603 510-3673-100C 840 .01 µF ±10% X7R 0603 510-3675-103C 841 22 pF ±5% NPO 0603 510-3674-220C 842 4.7 µF 10V SMD tantalum 510-2624-479C 843 .01 µF ±10% X7R 0603 510-3675-103C 844 .01 µF ±10% X7R 0603 510-3675-103C 845 .01 µF ±10% X7R 0603 510-3675-103C 846 .01 µF ±10% X7R 0603 510-3675-103C 847 .01 µF ±10% X7R 0603 510-3675-103C 850 22 pF ±5% NPO 0603 510-3674-220C 851 22 pF ±5% NPO 0603 510-3674-220C 852 22 pF ±5% NPO 0603 510-3674-220C 853 22 pF ±5% NPO 0603 510-3674-220C 854 .01 µF ±10% X7R 0603 510-3675-103C 855 .01 µF ±10% X7R 0603 510-3675-103
PARTS LIST7-3June 1997 Part No. 001-3492-001SYMBOL PARTNUMBER DESCRIPTION NUMBERC 856 .01 µF ±10% X7R 0603 510-3675-103C 900 .01 µF ±10% X7R 0603 510-3675-103C 901 .01 µF ±10% X7R 0603 510-3675-103C 902 .01 µF ±10% X7R 0603 510-3675-103C 903 .01 µF ±10% X7R 0603 510-3675-103CR200 Switching diode SOT-23 523-1504-002CR240 Varactor BB535 SOD-323 523-5005-022CR530 Hot carrier SOT-23 523-1504-016CR531 Hot carrier SOT-23 523-1504-016CR540 PIN switch diode SOT-23 523-1504-001CR541 PIN switch diode SOT-23 523-1504-001CR840 Varactor BB535 SOD-323 523-5005-022EP130 Ferrite bead SMD 517-2503-001EP200 Mini cer crystal pin insulator 010-0345-280EP510 Ferrite bead SMD 517-2503-001EP511 Ferrite bead SMD 517-2503-001EP512 Ferrite bead SMD123 517-2503-010EP513 Ferrite bead SMD 517-2503-001HW102 Grafoil MHW 806 (25 kHz) 018-1007-104HW104 900 MHz module shield 017-2225-754HW104 4-40 machine panhead ZPS 575-1604-010J 201 14-pin single row header 515-7110-214J 501 Jack right angle PC mount 142-0701-501L 200 2.2 nH ±10% 0805 SMD 542-9003-226L 201 8.2 nH inductor LL2012 542-9003-826L 210 22 nH ±10% SMD 542-9003-227L 211 15 nH inductor LL21012 542-9003-157L 212 270 nH variable SMT 542-5103-157L 221 0.39 µH inductor SMD 542-9001-398L 222 270 nH variable SMT 542-5103-157L 230 680 µH quad coil 542-5102-001L 240 120 nH 50 x 80 chip 542-9007-121L 260 10 nH ±10% 0805 SMD 542-9003-107L 261 2.7 nH ±10% 0805 SMD 542-9003-276L 262 10 nH ±10% 0805 SMD 542-9003-107L 500 1 µH inductor SMD 542-9001-109L 540 8 nH air core inductor SMD 542-0030-003L 541 12.5 nH air core inductor SMD 542-0030-004L 542 8 nH air core inductor SMD 542-0030-003L 543 1 µH inductor SMD 542-9001-109L 544 2T 24 AWG 0.08 ID 542-0030-002SYMBOL PARTNUMBER DESCRIPTION NUMBERMP101 Heat sink 014-0778-047MP102 Grafoil MHW 806 018-1007-104MP102 900 MHz shield (25 kHz) 017-2225-754MP107 Low pass 017-2225-771MP108 Synthisizer bottom shield 017-2225-772MP801 VCO can 017-2225-751MP806 Crystal filter shield 017-2225-699Q 100 NPN digital 47k/47 transistor 576-0013-046Q 101 PNP digital 10k/47 transistor 576-0013-032Q 110 NPN digital 47k/47 transistor 576-0013-046Q 130 NPN digital 47k/47 transistor 576-0013-046Q 131 NPN digital 47k/47 transistor 576-0013-046Q 132 PNP digital 10k/47 transistor 576-0013-032Q 133 NPN digital 47k/47 transistor 576-0013-046Q 134 PNP digital 10k/47 transistor 576-0013-032Q 135 NPN high current SOT-223 576-0006-027Q 200 PNP gen purp SC70 MSB1218 576-0013-700Q 201 NPN low noise SOT-23 576-0003-636Q 211 Dual gate GaAS 576-0006-405Q 240 VHF/UHF amp SOT-23 576-0003-634Q 260 NPN low noise SOT-23 576-0003-636Q 261 PNP gen purp SC70 MSB1218 576-0013-700Q 500 Bipolar MMIC SOT-143 576-0003-640Q 520 NPN high current SOT-223 576-0006-027Q 800 NPN gen purp SC70 MSD1819 576-0013-701Q 840 NPN digital 47k/47 transistor 576-0013-046Q 841 NPN digital 47k/47 transistor 576-0013-046Q 842 NPN digital 47k/47 transistor 576-0013-046Q 843 NPN digital 47k/47 transistor 576-0013-046Q 844 NPN digital 47k/47 transistor 576-0013-046Q 845 NPN gen purp SC70 MSD1819 576-0013-701Q 911 NPN Si SOT-23 576-0003-658R 110 100k ohm ±5% 0.063W 0603 569-0155-104R 111 51k ohm ±5% 0.063W 0603 569-0155-513R 112 15k ohm ±5% 0.063W 0603 569-0155-153R 113 100k ohm ±5% 0.063W 0603 569-0155-104R 114 15k ohm ±5% 0.063W 0603 569-0155-153R 130 100k ohm ±5% 0.063W 0603 569-0155-104R 131 1k ohm ±5% 0.063W 0603 569-0155-102R 132 22k ohm ±5% 0.063W 0603 569-0155-223R 133 43k ohm ±5% 0.063W 0603 569-0155-433R 134 10k ohm ±5% 0.063W 0603 569-0155-103R 135 10k ohm ±5% 0.063W 0603 569-0155-103R 136 150k ohm ±5% 0.063W 0603 569-0155-154R 137 150k ohm ±5% 0.063W 0603 569-0155-154R 138 10k ohm ±5% 0.063W 0603 569-0155-103
PARTS LIST7-4June 1997Part No. 001-3492-001SYMBOL PARTNUMBER DESCRIPTION NUMBERR 139 470 ohm ±5% 0.063W 0603 569-0155-471R 140 3.6k ohm ±5% 0.063W 0603 569-0155-362R 141 5.6k ohm ±5% 0.063W 0603 569-0155-562R 148 10k ohm ±5% 0.063W 0603 569-0155-103R 200 12k ohm ±5% 0.063W 0603 569-0155-123R 201 39k ohm ±5% 0.063W 0603 569-0155-393R 202 300 ohm ±5% 0.063W 0603 569-0155-301R 203 39k ohm ±5% 0.063W 0603 569-0155-393R 205 2.2k ohm ±5% 0.063W 0603 569-0155-222R 212 10 ohm ±5% 0.063W 0603 569-0155-100R 213 1k ohm ±5% 0.063W 0603 569-0155-102R 214 10k ohm ±5% 0.063W 0603 569-0155-103R 215 160 ohm ±5% 0.063W 0603 569-0155-161R 223 1.5k ohm ±5% 0.063W 0603 569-0155-152R 230 3.3k ohm ±5% 0.063W 0603 569-0155-332R 231 2.4k ohm ±5% 0.063W 0603 569-0155-242R 232 39k ohm ±5% 0.063W 0603 569-0155-393R 233 33k ohm ±5% 0.063W 0603 569-0155-333R 234 7.5k ohm ±5% 0.063W 0603 569-0155-752(12.5 kHz BW)18k ohm ±5% 0.063W 0603 569-0155-183(25 kHz BW)R 240 100 ohm ±5% 0.063W 0603 569-0155-101R 241 75k ohm ±5% 0.063W 0603 569-0155-753(12.5 kHz BW Only)R 242 68k ohm ±5% 0.063W 0603 569-0155-683R 243 22k ohm ±5% 0.063W 0603 569-0155-223R 244 10 ohm ±5% 0.063W 0603 569-0155-100R 245 1k ohm ±5% 0.063W 0603 569-0155-102R 246 100k ohm ±5% 0.063W 0603 569-0155-104R 247 330 ohm ±5% 0.063W 0603 569-0155-331R 248 330 ohm ±5% 0.063W 0603 569-0155-331R 249 22k ohm ±5% 0.063W 0603 569-0155-223R 250 4.7k ohm ±5% 0.063W 0603 569-0155-472R 260 2.2k ohm ±5% 0.063W 0603 569-0155-222R 261 390 ohm ±5% 0.063W 0603 569-0155-391R 262 39k ohm ±5% 0.063W 0603 569-0155-393R 263 220 ohm ±5% 0.063W 0603 569-0155-221R 264 12k ohm ±5% 0.063W 0603 569-0155-123R 265 39k ohm ±5% 0.063W 0603 569-0155-393R 266 100k ohm ±5% 0.063W 0603 569-0155-104R 267 8.2k ohm ±5% 0.063W 0603 569-0155-822R 500 270 ohm ±5% 0.063W 0603 569-0155-271R 501 18 ohm ±5% 0.063W 0603 569-0155-180R 502 270 ohm ±5% 0.063W 0603 569-0155-271R 503 470 ohm ±5% 0.063W 0603 569-0155-471R 504 470 ohm ±5% 0.063W 0603 569-0155-471SYMBOL PARTNUMBER DESCRIPTION NUMBERR 520 470 ohm ±5% 0.063W 0603 569-0155-471R 521 10k ohm ±5% 0.063W 0603 569-0155-103R 522 100k ohm ±5% 0.063W 0603 569-0155-104R 525 100k ohm SMD trimmer 569-0130-104R 526 10k ohm ±5% 0.063W 0603 569-0155-103R 527 10k ohm ±5% 0.063W 0603 569-0155-103R 528 10 ohm ±5% 0.063W 0603 569-0155-100R 529 10k ohm ±5% 0.063W 0603 569-0155-103R 531 10 ohm ±5% 0.063W 0603 569-0155-100R 532 10k ohm ±5% 0.063W 0603 569-0155-103R 534 1k ohm ±5% 0.063W 0603 569-0155-102R 535 51 ohm ±5% 0.063W 0603 569-0155-510R 536 1k ohm ±5% 0.063W 0603 569-0155-102R 537 51 ohm ±5% 0.063W 0603 569-0155-510R 540 100 ohm ±5% 0.75W 2010 569-0135-101R 541 47k ohm ±5% 0.063W 0603 569-0155-473R 800 4.7k ohm ±5% 0.063W 0603 569-0155-472R 801 4.7k ohm ±5% 0.063W 0603 569-0155-472R 802 4.7k ohm ±5% 0.063W 0603 569-0155-472R 803 6.8k ohm ±5% 0.063W 0603 569-0155-682R 804 6.8k ohm ±5% 0.063W 0603 569-0155-682R 805 6.8k ohm ±5% 0.063W 0603 569-0155-682R 806 20 ohm ±5% 0.063W 0603 569-0155-200R 808 4.7k ohm ±5% 0.063W 0603 569-0155-472R 809 10k ohm ±5% 0.063W 0603 569-0155-103R 810 4.7k ohm ±5% 0.063W 0603 569-0155-472R 811 51 ohm ±5% 0.063W 0603 569-0155-510R 812 4.7k ohm ±5% 0.063W 0603 569-0155-472R 813 16k ohm ±5% 0.063W 0603 569-0155-163R 814 100k ohm SMD trimmer 569-0130-104R 815 120k ohm ±5% 0.063W 0603 569-0155-124R 816 39k ohm ±5% 0.063W 0603 569-0155-393R 817 10k ohm ±5% 0.063W 0603 569-0155-103R 818 220k ohm ±5% 0.063W 0603 569-0155-224R 819 68k ohm ±5% 0.063W 0603 569-0155-683R 820 10k ohm ±5% 0.063W 0603 569-0155-103R 821 10 ohm ±5% 0.063W 0603 569-0155-100R 822 18k ohm ±5% 0.063W 0603 569-0155-183R 823 10k ohm ±5% 0.063W 0603 569-0155-103R 840 10k ohm ±5% 0.063W 0603 569-0155-103R 841 3.9k ohm ±5% 0.063W 0603 569-0155-392R 842 10k ohm ±5% 0.063W 0603 569-0155-103R 843 3.9k ohm ±5% 0.063W 0603 569-0155-392R 844 10k ohm ±5% 0.063W 0603 569-0155-103R 845 4.7k ohm ±5% 0.063W 0603 569-0155-472R 846 24 ohm ±5% 0.063W 0603 569-0155-240R 847 24 ohm ±5% 0.063W 0603 569-0155-240
PARTS LIST7-5June 1997 Part No. 001-3492-001SYMBOL PARTNUMBER DESCRIPTION NUMBERR 848 24 ohm ±5% 0.063W 0603 569-0155-240R 849 24 ohm ±5% 0.063W 0603 569-0155-240R 900 10k ohm ±5% 0.063W 0603 569-0155-103R 901 10k ohm ±5% 0.063W 0603 569-0155-103R 911 10k ohm ±5% 0.063W 0603 569-0155-103R 912 47k ohm ±5% 0.063W 0603 569-0155-473R 913 47k ohm ±5% 0.063W 0603 569-0155-473R 914 1k ohm ±5% 0.063W 0603 569-0155-102U 110 Voltage regulator adjustable 544-2603-093U 111 Voltage regulator adjustable 544-2603-093U 130 Quad op amp SO-14 331 544-2020-017U 230 FM IF SA676DK 544-2002-037U 510 6W power module 900 MHz 544-4001-049U 520 Op amp SO-8 MC33172D 544-2019-017U 800 Fractional-N synthesizer 544-3954-027U 840 8-stage shift register SOIC 544-3016-094U 900 Quad 8-bit TLC5620ID 544-2031-014U 901 8-stage shift register SOIC 544-3016-094U 902 3 2-chnl analog mux/demux 544-3016-053Y 800 17.5 MHz TCXO ±1.5 PPM 518-7009-521Z 200 944 MHz 3-pole ceramic 532-2006-040Z 201 944 MHz 3-pole ceramic 532-2006-040Z 220 87.85 MHz 4-pole 8 kHz BW 532-0009-021(12.5 kHz BW)Z 220 87.85 MHz 4-pole 15 kHz BW 532-0009-022(25 kHz BW)Z 221 87.85 MHz 4-pole 8 kHz BW 532-0009-021(12.5 kHz BW)Z 221 87.85 MHz 4-pole 15 kHz BW 532-0009-022(25 kHz BW)Z 230 450 kHz 9 kHz BW ceramic 532-2004-015(12.5 kHz BW)Z 230 450 kHz 20 kHz BW ceramic 532-2004-013(25 kHz BW)Z 231 450 kHz 9 kHz BW ceramic 532-2004-015(12.5 kHz BW)Z 231 450 kHz 20 kHz BW ceramic 532-2004-013(25 kHz BW)SYMBOL PARTNUMBER DESCRIPTION NUMBERVCO 928-960 MHzPart No. 023-3492-540C 820 22 pF ±5% NPO 0603 510-3674-220C 821 22 pF ±5% NPO 0603 510-3674-220C 822 22 pF ±5% NPO 0603 510-3674-220C 824 1.5 pF ±0.1 pF NPO 0603 510-3673-159C 825 2 pF ±0.1 pF NPO 0603 510-3673-209C 826 22 pF ±5% NPO 0603 510-3674-220C 827 22 pF ±5% NPO 0603 510-3674-220C 830 22 pF ±5% NPO 0603 510-3674-220C 831 22 pF ±5% NPO 0603 510-3674-220C 832 22 pF ±5% NPO 0603 510-3674-220C 833 6.8 pF ±0.1 pF NPO 0603 510-3673-689C 834 1 pF ±0.1 pF NPO 0603 510-3673-109C 835 22 pF ±5% NPO 0603 510-3674-220C 836 4.3 pF ±0.1 pF NPO 0603 510-3673-439C 838 1 pF ±0.1 pF NPO 0603 510-3673-109C 840 .001 µF ±10% X7R 0603 510-3675-102C 841 22 pF ±5% NPO 0603 510-3674-220C 842 2.2 pF ±0.1 pF NPO 0603 510-3673-229C 844 3.9 pF ±0.1 pF NPO 0603 510-3673-399C 845 3.9 pF ±0.1 pF NPO 0603 510-3673-399C 846 2.7 pF ±0.1 pF NPO 0603 510-3673-279C 850 22 pF ±5% NPO 0603 510-3674-220C 851 4.7 pF ±0.1 pF NPO 0603 510-3673-479C 852 22 pF ±5% NPO 0603 510-3674-220C 853 22 pF ±5% NPO 0603 510-3674-220C 854 22 pF ±5% NPO 0603 510-3674-220C 860 22 pF ±5% NPO 0603 510-3674-220C 861 4.3 pF ±0.1 pF NPO 0603 510-3673-439C 863 2 pF ±0.1 pF NPO 0603 510-3673-200CR820 PIN switch diode SOT 523-1504-001CR821 PIN switch diode SOT 523-1504-001CR822 Varactor SOD-323 BB535 523-5005-022CR824 Varactor SOD-323 BB535 523-5005-022L 820 68 nH ±10% SMD 0805 542-9003-687L 821 68 nH ±10% SMD 0805 542-9003-687L 822 68 nH ±10% SMD 0805 542-9003-687L 823 68 nH ±10% SMD 0805 542-9003-687L 825 68 nH ±10% SMD 0805 542-9003-687L 826 Resonator 0.5" long SMD 542-9004-011L 830 68 nH ±10% SMD 0805 542-9003-687L 831 12 nH inductor LL2012 542-9003-127L 832 3.3 nH inductor ceramic 542-9003-336L 833 10 nH inductor LL2012 542-9003-107
PARTS LIST7-6June 1997Part No. 001-3492-001SYMBOL PARTNUMBER DESCRIPTION NUMBERQ 820 NPN transistor NE85619 576-0003-651Q 821 NPN transistor NE85619 576-0003-651Q 822 NPN transistor NE85619 576-0003-651Q 823 NPN transistor NE85619 576-0003-651R 820 10k ohm ±5% 0.063W 0603 569-0155-103R 821 100 ohm ±5% 0.063W 0603 569-0155-101R 822 10k ohm ±5% 0.063W 0603 569-0155-103R 823 10k ohm ±5% 0.063W 0603 569-0155-103R 824 3.3k ohm ±5% 0.063W 0603 569-0155-332R 825 10 ohm ±5% 0.063W 0603 569-0155-100R 826 150 ohm ±5% 0.063W 0603 569-0155-151R 827 10 ohm ±5% 0.063W 0603 569-0155-100R 830 4.3k ohm ±5% 0.063W 0603 569-0155-432R 831 5.6k ohm ±5% 0.063W 0603 569-0155-562R 832 3k ohm ±5% 0.063W 0603 569-0155-302R 833 200 ohm ±5% 0.063W 0603 569-0155-201R 835 200 ohm ±5% 0.063W 0603 569-0155-201R 836 200 ohm ±5% 0.063W 0603 569-0155-201R 840 100 ohm ±5% 0.063W 0603 569-0155-101R 842 27k ohm ±5% 0.063W 0603 569-0155-273R 843 3.9k ohm ±5% 0.063W 0603 569-0155-392
8-1June 1997 Part No. 001-3492-001SECTION 8 SCHEMATICS AND COMPONENT LAYOUTSTRANSISTOR AND DIODE BASINGREFERENCE TABLETRANSISTORSPart Number Basing Diagram Identification576-0003-636 1576-0003-640 2576-0006-027 4P1F576-0006-405 3U72576-0013-032 16D576-0013-046 18C576-0013-700 1BR576-0013-701 1ZRDIODES523-1504-001 54D523-1504-002 55A523-1504-016 55F523-5005-022 55BTOPVIEWCBE1TOPVIEWCCEB4TOPVIEW5ANCCTOPVIEWINGNDGNDOUT 2TOPVIEWG1G2SD3123 4INTEGRATED CIRCUITS
SCHEMATICS AND COMPONENT LAYOUTS8-2June 1997Part No. 001-3492-001 Figure 8-1 LOADER BOARD INTERCONNECTGROUNDSYNTH LOCKSYNTH ENDATASYNTH CLOCKDEMODJ1WIDE BAND OUTRSSIRX DATA OUTGROUNDTX DATA INCARRIER DETECTPTTWIDE BAND IN1211123456789101314MOD INDIAG ENRSSIDIAGFREQ SEL1234567891012345GROUNDRX DATATX DATASLEEP/WAKE UPCONNECTORPROGRAMMINGUSER INTERFACELOADER BOARDRF BOARDJ10411678910 GROUNDGROUNDNCPRG0PRG1PRG2P101J102+13.3V DC+13.3VTX ENRX ENRF EN242-3492-5xx023-3240-001GROUNDGROUNDSYNTH LOCKSYNTH ENDATASYNTH CLOCKDEMODMOD INDIAG ENRSSIDIAG+13.3VTX ENRX ENRF EN
SCHEMATICS AND COMPONENT LAYOUTS8-3June 1997 Part No. 001-3492-001Figure 8-2 MODEM INTERCONNECT 123457891011121314ANTENNA6TELEMETRY RF BOARDP1123457891011121314J163276 MODEMGROUNDRXDTXDTEST AUDIOB+GROUNDCTSRTSDCDB+CS0CS1CS2RSSIDTR PGM15GROUNDSYNTH LOCKSYNTH ENDATASYNTH CLOCKDEMODMOD INDIAG ENRSSIDIAG+13.3VTX ENRX ENRF ENGROUNDSYNTH LOCKSYNTH EN DATASYNTH CLOCKDEMODMOD INDIAG ENRSSIDIAG+13.3VTX ENRX ENRF EN
SCHEMATICS AND COMPONENT LAYOUTS8-4June 1997Part No. 001-3492-001 Figure 8-3 TRANSCEIVER COMPONENT LAYOUT (COMPONENT SIDE VIEW)Figure 8-4 TRANSCEIVER COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW)
SCHEMATICS AND COMPONENT LAYOUTS8-5June 1997 Part No. 001-3492-001Figure 8-5 SCHEMATIC 1 OF 2
SCHEMATICS AND COMPONENT LAYOUTS8-6June 1997Part No. 001-3492-001 Figure 8-6 SCHEMATIC 2 OF 2
SCHEMATICS AND COMPONENT LAYOUTS8-7June 1997 Part No. 001-3492-001Figure 8-7 VCO COMPONENT LAYOUTC850C851R830C833L825C825C824C826L826W836W842C852R834R840C861C863R843W838W835 W840 W841 W831L831L832L833Q823Q821Q822C862R842C860R833R836R826R827R825C855C853C841C854C840R841R835R831R832C846C845 C844Q820CR820L830L820R823C831C830 C832W830 W820 W821W827L821CR824R824W826W839C834C842C820C836C838CR821L822L823 W822W823W833W824C835C821C822 C823W832W843W844R820R821CR822R822CR823C827W837W825
SCHEMATICS AND COMPONENT LAYOUTS8-8June 1997Part No. 001-3492-001 This page intentionally left blank.

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