CalAmp Wireless Networks 2424046-001 T-96SR UHF Telemetry Transceiver/Modem User Manual Cover dmf

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Date Submitted	1998-09-10 00:00:00
Date Available	1999-07-15 00:00:00
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SYNTHESIZED UHF TELEMETRY UNIT
PART NO. 242-3412-XX0
Second Printing
August 1997
Supersedes 001-3412-001 December 1996
Part No. 001-3412-002
8-97
Printed in U.S.A.
SYNTHESIZED UHF TELEMETRY UNIT
PART NO. 242-3412-XYZ
Copyright 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 communication solutions to the mobile data market serving public safety, utilities and industrial users.
DATA TELEMETRY PRODUCT WARRANTY
The manufacturer's warranty statement for this product is available from your product supplier or from the Johnson Data
Telemetry Corporation, 299 Johnson Avenue, PO Box 1733, Waseca, MN 56093-0833. Phone (507) 835-8819.
WARNING
This device complies with Part 15 of the FCC rules and Industry Canada RSS-119, issue 5. Operation is subject to the condition that this device does not cause harmful interference. In addition, changes or modification to this equipment not expressly
approved by the Johnson Data Telemetry Corporation could void the user's authority to operate this equipment (FCC rules,
47CFR Part 15.19).
DO NOT allow the antenna to come close to or touch, the eyes, face, or any exposed body parts while the radio is transmitting.
DO NOT operate the radio near electrical blasting caps or in an explosive atmosphere.
DO NOT operate the radio unless all the radio frequency connectors are secure and any open connectors are properly terminated.
DO NOT allow children to operate transmitter equipped radio equipment.
SAFETY INFORMATION
Proper operation of this radio will result in user exposure below the Occupational Safety and Health Act and Federal Communication Commission limits.
The information in this document is subject to change without notice.
™
Johnson Data Telemetry is a trademark of the Johnson Data Telemetry Corporation.
™ RNET is a trademark of Motorola Inc.
TABLE OF CONTENTS
GENERAL INFORMATION
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
SCOPE OF MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EQUIPMENT DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL-3412 WITH LOADER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL-3412 WITH RNET™ MODEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL3412 WITH DL3296 MODEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DM-3412 SYNTHESIZER PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSCEIVER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PART NUMBER BREAKDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FACTORY CUSTOMER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FACTORY RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION
2.1
2.2
PRE-INSTALLATION CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
INTERFACING WITH DATA EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
DM3412 (RF Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
PROGRAMMING
3.1
3.2
3.3
3.4
3.5
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
SYNTHESIZER DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
D-WORD CALCULATION (24-BITS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
C-WORD CALCULATION (24-BITS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
B-WORD CALCULATION (24-BITS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
A0-WORD CALCULATION (24-BITS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
RECEIVE TO TRANSMIT SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
TRANSMIT TO RECEIVE SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
RADIO DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
CIRCUIT DESCRIPTION
4.1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
RECEIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
LOADER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
VOLTAGE-CONTROLLED OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
VCO AND REFERENCE OSCILLATOR MODULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
CASCODE AMPLIFIERS/VCO (Q851/Q852) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
AMPLIFIER (Q853) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
VOLTAGE FILTER (Q901) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
VCO FREQUENCY SHIFT (Q841) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
SYNTHESIZER IC (U811) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
LOCK DETECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.2
1-1
1-1
1-1
1-1
1-2
1-2
1-2
1-2
1-2
1-3
1-3
1-3
1-3
1-4
TABLE OF CONTENTS
4.3
4.4
4.5
RECEIVER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
HELICAL FILTER (Z201), RF AMPLIFIER (Q201) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
MIXER (U211) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
FIRST LO AMPLIFIER (Q301). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
BUFFER (Q211), CRYSTAL FILTER (Z221/Z222), IF AMP (Q231). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
SECOND LO AMP/TRIPLER (Q401). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
SECOND MIXER/DETECTOR (U241) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
TRANSMITTER CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
BUFFER (Q501) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
PRE-DRIVER (Q511) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
FINAL (U521), COMPARATOR (U111C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
ANTENNA SWITCH (CR561, CR562). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
TRANSMIT KEY-UP CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
VOLTAGE REGULATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
+9.6 AND +5.5V REGULATED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
SERVICING
5.1
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
PERIODIC CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
SURFACE-MOUNTED COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
REPLACEMENT PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
TCXO MODULE NOT SERVICEABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
SYNTHESIZER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
REFERENCE OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
SYNTHESIZER (U801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
RECEIVER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
MIXER/DETECTOR (U241) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
SECOND LO (Q401) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
AUDIO BUFFER AMP (U261) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
IF AMP (U231). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
BUFFER AMP (Q211), CRYSTAL FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
MIXER (U211) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
LNA (Q202), HELICAL FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
ANTENNA SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
TRANSMITTER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
SUPPLY VOLTAGES AND CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
VCO (A801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
PRE-DRIVER (Q511) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
FINAL AMPLIFIER (U521) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
ANTENNA SWITCH (CR561/CR562) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
MODULATION INPUT (J201, PIN 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
TCXO (Y801) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.2
5.3
5.4
TABLE OF CONTENTS
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
6.1
6.2
6.3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
TEST EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
DL3412 TRANSCEIVER ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
VCO CONTROL VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
TRANSMITTER AND FREQUENCY ALIGNMENT (OEM Not Using Diagnostics). . . . . . . . . . . . . . . . . . . . . . 6-1
MODULATION ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
TRANSMITTER AND FREQUENCY ALIGNMENT (Johnson Loader Using Diagnostics) . . . . . . . . . . . . . . . . . 6-2
MODULATION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
RECEIVER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
IF AND AUDIO ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
PARTS LIST
SCHEMATICS AND COMPONENT LAYOUTS
SECTION 1 GENERAL INFORMATION
1.1 SCOPE OF MANUAL
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 1-612890-8155 to speak to a sales representative.
This service manual contains alignment and service information for the Johnson Data Telemetry
(JDT) DM-3412 UHF Synthesized 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.
1.2.2 DL-3412 WITH LOADER BOARD
The DL-3412 (Part No. 242-3412-xxx) can be
ordered with the 8-channel Loader board (Part No.
023-3240-001). The Loader board performs synthesizer loading through an RS-232 DB-9 interface. In
addition, this board has circuitry which provides electronic control of the following:
Service manuals addressing items specific to the
Loader board (Part No. 001-3240-001) and the
Modem boards (Part No. 001-3276-001/001-3296001) should be referenced for the users specific configuration.
1.2 EQUIPMENT DESCRIPTION
Transmit/Receive data conditioning and gating
Carrier Detect
Power Control
Modulation Flatness
Audio/Data Filtering
Sleep/Wake-up to minimize current consumption
Diagnostics that includes:
Input Voltage Sense
Input Current Sense
Ambient Temperature Sense
RSSI Indicator (RSSI Sense)
Forward/Reverse Power Sense.
1.2.1 GENERAL
The JDT DM-3412 is a synthesized data transceiver (transmitter and receiver) which operates in the
380-512 MHz UHF frequency range. Transmitter
power output is 5 watts nominal at 13.3V DC in simplex or half duplex modes.
Versions of the DM-3412 covered in this manual
are indicated in Section 1.5. The DM-3412 has a frequency stability of ± 1.5 PPM (see Section 3) and is
available with or without the Loader/Modem boards.
The gating circuits allow user selection of data
filtering (standard or wide band) and also pre-emphasis/de-emphasis to be enabled or disabled.
The number of channels that can be selected with
the DM-3412 model is determined by the customer
supplied synthesizer loading circuitry. The
DL-3412 model is 8-Channels when supplied with the
DL-3240 Loader board, the DL-3276 modem kit or
the DL-3296 modem kit.
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.
In addition to this UHF radio, JDT has a full line
of radios and radio modems to meet wireless data
communication needs. Both OEM RF decks and complete FCC and Industry Canada 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).
NOTE: The synthesizer must be loaded each time
power is turned on. Therefore, one loader board or
customer supplied programming circuit is required for
each data transceiver.
1-1
August 1997
Part No. 001-3412-002
GENERAL INFORMATION
mat is asynchronous with either 8 or 9 data bits. The
modem can operate in either standard DTE/DCE
handshake protocol or in Data Activation mode which
requires only receive and transmit data lines. The
baud rates are user selectable from 300 to 9600 baud
in a 25 kHz bandwidth or 300 to 4800 baud in a
12.5 kHz bandwidth.
1.2.3 DL-3412 WITH RNET™ MODEM
The DL-3412 (Part No. 242-3412-xxx) can be
ordered with the 9600 baud Modem (Part No. 0233276-001), which supports the RNET™ communication protocol. This modem allows data communication between the Johnson Data Telemetry high specification synthesized products and the Motorola RNET
radio/modems.
1.2.5 DM-3412 SYNTHESIZER PROGRAMMING
The DM-3412, when used without the Universal
Loader Board (Part No. 023-3240-001) or DL-3276/
DL-3296 modem kits, requires customer supplied
circuitry to load the synthesizer with channel information. The protocol that this circuitry must follow is
described in Section 3.
The Modem features include:
User Programmable Data Rates:
9600/4800/2400/1200 baud in a 25 kHz bandwidth
OR
1200/2400/4800 baud in a 12.5 kHz bandwidth.
RS-232 compatible using DE-15 15-pin connector.
Simplex or Half-Duplex operation.
RTS-CTS handshaking protocol with option for
configuring any two units as a digital repeater
(Half-Duplex or Simplex).
Supports asynchronous, serial or transparent data
formats.
Front panel LEDs provide indication for Transmit,
Receive and Power.
Built-In Diagnostics reported both locally and
"Over-The-Air":
Reports specific unit programming
Loopback test feature
RSSI
Forward and Reflected Power
Temperature
Supply Voltage
8-Channels programmable with option to switch
channels remotely "Over-The-Air".
1.3 TRANSCEIVER IDENTIFICATION
The transceiver identification number is printed
on a label that is affixed to the PC board. The following information is contained in that number:
Revision
Letter
Model
3412
Ninth Digit
of PN
Manufacture
Date
14 3
Week No.
of Year
Warranty
Number
Plant
12345
Year
1.4 ACCESSORIES
Accessories available for the DL-3412 data transceiver are listed in Table 1-1.
Table 1-1 ACCESSORIES
This board is programmed using an IBM PC or
compatible computer using MS-DOS and the RSS
programming software (Part No. 023-3276-005). Programming instructions contained in the RSS Manual
included in the part number listed in Table 1-1.
Accessory
DL-3240 Loader Kit
023-3240-001
DL-3296 Modem Kit
023-3296-001
DL-3276 Modem Kit
023-3276-001
DL-3295 Telemetry Modem
250-3295-001/101
DL-3282 Modem*
250-3282-001
DL-3276 Service Manual
001-3276-001
DL-3240 Service Manual
001-3240-001
DL-3296 Service Manual
001-3296-001
Interface Cable
023-3276-007
Interface Cable
023-3276-008
* Must have Loader Kit installed in radio to make this
modem compatible with radio.
1.2.4 DL3412 WITH DL3296 MODEM
The DL3296 modem (Part No. 023-3296-001)
provides digital data transmission at data rates up to
9600 baud. The DL3296 operates in Half-Duplex
mode. However, two transceivers can be combined to
provide Full-Duplex operation. The user interface is a
serial port through a 9-pin D-connector configurable
to either RS-232 or TTL signal levels. The data forAugust 1997
Part No. 001-3412-002
Part No.
1-2
GENERAL INFORMATION
1.5 PART NUMBER BREAKDOWN
Customer Service Department - (507) 835-6911
Customer Service FAX Machine - (507) 835-6969
The following is a breakdown of the part number
used to identify this transceiver:
You may also contact the Customer Service
Department by mail. Please include all information
that may be helpful in solving your problem. The
mailing address is as follows:
242-3412 - X Y Z
0 = Transceiver
6 = Transmit Only
8 = Receive Only
Johnson Data Telemetry Corporation
Customer Service Department
299 Johnson Avenue
P.O. Box 1733
Waseca, MN 56093-0833
1 = 12.5 kHz
3 = 25 kHz
1 = 380-403 MHz
2 = 403-419 MHz
3 = 419-435 MHz
4 = 435-451 MHz
5 = 450-470 MHz
6 = 464-480 MHz
7 = 480-496 MHz
8 = 496-512 MHz
1.7 PRODUCT WARRANTY
The warranty statement for this transceiver is
available from your product supplier or from the Warranty Department, Johnson Data Telemetry Corporation, 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 questions concerning warranties or warranty service by
dialing (507) 835-6970.
1.6 FACTORY CUSTOMER SERVICE
The Customer Service Department of the
Johnson Data Telemetry Corporation provides customer assistance on technical problems and the availability of local and factory repair facilities. Customer
Service hours are 7:30 a.m. - 4:30 p.m. Central Time,
Monday - Friday. 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 number
1.8 REPLACEMENT PARTS
Replacement parts can be ordered directly from
the Service Parts Department. To order parts by
phone, dial the toll-free number and then enter "3" as
described in Section 1.6. When ordering, please supply the part number and quantity of each part ordered.
Johnson Data Telemetry dealers also need to give their
account number.
1-800-992-7774
When 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 telephone. If you have a pulse-type telephone, wait until
the message is finished and an operator will come on
the line to assist you. When you enter a first number
of "3", another number is requested to further categorize 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
FAX Machine - Cust Serv
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 number is shown in Section 1.6.
Johnson Data Telemetry Corporation
Service Parts Department
299 Johnson Avenue
PO Box 1733
Waseca, MN 56093-0833
(612) 882-5671
(507) 835-6969
If you are calling from outside the continental
United States, the Customer Service telephone numbers are as follows:
1-3
August 1997
Part No. 001-3412-002
GENERAL INFORMATION
1.9 FACTORY RETURNS
Repair service is normally available through local
authorized Johnson Data Telemetry Radio Service
Centers. If local service is not available, the equipment can be returned to the factory for repair. However, it is recommended that you contact the Field Service Department before returning equipment. A
service representative may be able to suggest a solution to the problem so that return of the equipment
would not be necessary. If using the toll-free number
in the preceding section, enter "3".
Be 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 damage 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 identify 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 referenced on the repair order to make it easier and faster
to locate your unit in the lab.
Return Authorization (RA) numbers are not necessary 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 specific 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 contact the Field Service Department when the unit
arrives.
August 1997
Part No. 001-3412-002
1-4
GENERAL INFORMATION
3412 UHF SYNTHESIZED TELEMETRY UNIT SPECIFICATIONS
The following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from the Marketing Department. Specifications are
subject to change without notice.
GENERAL
Frequency Range
Frequency Control
Channel Spacing
Mode of Operation
Operating Voltage
Regulated Supply Voltages
Transmit Enable
Receive Enable
Transceiver Enable
Power and Data Connector
RF Input/Output
Operating Temperature
Storage Temperature
Humidity
Maximum Dimensions
FCC Compliance
DM3412
DL3412
RECEIVER
Bandwidth
Frequency Stability
Sensitivity - 12 dB SINAD
RF Input Impedance
Selectivity
Spurious and Image Rejection
Conducted Spurious Emissions
Intermodulation
FM Hum and Noise
Receive Attack Time
Total Receive On Time
Audio
Distortion
Buffered Output Level
Discriminator Output
Output Bias
Output Impedance
RSSI
380-512 MHz
Synthesized
12.5/25 kHz
Simplex or Half Duplex
+13.3V DC nominal (10-16V DC operational)
+5.5V DC, +9.6V DC
3-16V DC at 150 µA max
3-16V DC ±5% at 150 µA nominal (150 µA during receive)
3-16V DC at less than 150 µA
14-pin in-line socket (Dupont 76308-14)
SMA Jack (female)
-30°C to +60°C (-22°C to +140°F)
-40°C to +85°C (-40°F to +185°F)
95% maximum RH at 40°C, non-condensing
4.585" L, 3.25" W, 2.212" H
Customer must apply
Part 90, Part 15 (403-512 MHz), Industry Canada RSS119, Issue 5
16 MHz all bands except (20 MHz 308-403/450-470 MHz)
±1.5 PPM (-30°C to +60°C (-22°C to +140°F)
≤ 0.35 µ V
50 ohms
-70 dB/-60 dB (tN/t/E) for 25 kHz, 60 dB/50 dB (tN/t/E) for 12.5 kHz
-70 dB
< -57 dBm
-70 dB
-40 dB 12.5/25 kHz
< 5 ms
7 mS maximum
< 3%
150 mV RMS nominal at 2.5V DC bias
±1 dB from DC to 5 kHz (reference to 1 kHz)
2.5V DC ±10%
>10k ohms
0.9V to 2.4V DC output from -120 to -60 dBm, attack time < 2 ms
1-5
August 1997
Part No. 001-3412-002
GENERAL INFORMATION
TRANSMITTER
Frequency Stability
Bandwidth
Maximum System Deviation
Modulation
Input Bias
Input Impedance
Distortion
Capability
Flatness
RF Power Output
Deviation Symmetry
RF Output Impedance
Duty Cycle
Adjacent Channel Power
Intermodulation Attenuation
Spurious and Harmonic FM
FM Hum and Noise
August 1997
Part No. 001-3412-002
±1.5 PPM (-30°C to +60°C (-22°C to +140°F)
16 MHz without tuning
20 MHz without tuning 380-403 and 450-470 MHz bands
5 kHz (25 kHz), 2.5 kHz (12.5 kHz)
FM/DC coupled
2.5V DC ±1% temperature compensated to ±100 mV. Supplied in Tx/Rx.
>40k ohms
< 3% at 60% of maximum system deviation, 1 kHz tone
1.8V P-P ±2 dB produces ±5 kHz deviation with a 1 kHz tone
±2 dB, DC-5 kHz at 1 kHz (Programmable to ±0.5 dB with diagnostic DAC
1-5W ±20% adjustable (5W at 13.3Vnominal)
5%
50 ohms
50% (30 sec. max transmit)
-70 dB
-40 dB
-26 dBm max.
-45 dB 25 kHz, -40 dB 12.5 kHz
1-6
SECTION 2 INSTALLATION
2.1 PRE-INSTALLATION CHECKS
±3 dB that produces ±5 kHz deviation with a 1 kHz
tone. When this input is used, a temperature compensated 2.5V DC bias is required as variations in voltage
cause the frequency to change. The transceiver regulatory compliance must be applied for with the customer
supplied modulation limiting/filter circuit and chassis.
Field alignment should not be required before the
3412 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.
Pin 7 (Synth Lock) - Output from synthesizer lock detect circuit. Low (< 1V DC) = unlocked, high (>2.5V
DC) = locked.
2.2 INTERFACING WITH DATA EQUIPMENT
2.2.1 DM3412 (RF Board)
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..
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 transceiver. An interface cable diagram and pin designations are shown in Figure 2-1.
Pin 9 (Data) - TTL input. Serial data line used for programming the synthesizer and diagnostic functions.
Pin 10 (Synth Clock) - TTL input. Clock signal for serial data input on Pin 9. Data is valid on the rising edge.
1 MHz max. frequency.
The following is a general description of the
input and output signals on Transceiver Interface connector J201.
Pin 11 (Diag En) - TTL input. Loads programmed
DAC values into DAC (U911) for modulation adjust
and power set. Also provides the strobe signal for shift
register (U901) for selecting Forward and Reverse
power diagnostics. 250 ns min. activates on rising
edge.
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 12 (RSSI) - Analog output (0.5-2V DC). The Receive Signal Strength Indicator output provides a voltage that increases in proportion to the strength of the
RF input signal.
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 circuitry. ≤ 0.3 V DC in Tx mode.
Pin 13 (Demod) - Analog output. The Receiver Demod output level is 150 mV RMS with a modulation
signal of 1 kHz at 60% of maximum deviation. The output is DC coupled and referenced to +2.5V DC. Load
impedance should be >10k ohms.
Pin 5 (RF En) - Input +3-16V DC. Shuts down onboard 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 0.5 dB with the diagnostic DAC. The modulation capability is 250 mV RMS
Pin 14 (Diag) - Analog Output. This pin is enabled by
pin 11. When the Loader board is used it has the capability to test the operating environment through diag-
2-1
June 1997
Part No. 001-3412-002
INSTALLATION
nostics. The diagnostic capabilities are in Section 1.2.2
10
11
13
12
GND
14
+13.3V DC
TX EN
RX EN
RF EN
MOD IN
SYNTH LOCK
SYNTH EN
DATA
CLOCK
DIAG EN
RSSI
DEMOD
DIAG
Part No. 023-3472-007
Figure 2-1 DM3412 INTERFACE CABLE
June 1997
Part No. 001-3412-002
2-2
SECTION 3 PROGRAMMING
has a 1-bit address. When the A0 word is loaded, the
synthesizer frequency acquisition is initiated (see Figure 3-1).
3.1 INTRODUCTION
DM3412 - 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.
Receive Bandwidth
380-512 MHz
Transmit Bandwidth
380-512 MHz
First IF
52.95 MHz
Second IF
450.0 kHz
First LO Injection
432.95-564.95 MHz*
Second LO Injection
52.5 MHz**
TCXO Frequency
17.50 MHz
Resolution
6.25 or 10 kHz
Loop Comparison Freq. 50 kHz (FCM)
3.2 SYNTHESIZER DATA PROTOCOL
3.2.1 GENERAL
Programming of the SA-7025 Synthesizer IC
(U811) is accomplished via the 3-line bus; DATA,
CLOCK and SYNTH EN. Three 24-bit words (D, B
and A0) are required to load the synthesizer. The D
and B words contain four address bits each and the A0
D23 D22 D21 D20
* High Side Injection
** Low Side Injection
D01 D00
Data
MSB (23)
LSB (00)
Clock
Synth En
Clock (max.)
Synth Enable (min)
D00 - D23
1 MHz
250 ns (for D, C, and B words)
D, B and A0 words
Figure 3-1 24-BIT SYNTHESIZER SERIAL DATA STREAM
3-1
June 1997
Part No. 001-3412-002
PROGRAMMING
3.2.2 D-WORD CALCULATION (24-BITS)
3.2.3 C-WORD CALCULATION (24-BITS)
The D-Word programs the Main, Reference and
Auxiliary dividers, and sets the modulus.
The C-Word is not used in the DM-3412 synthesizer load.
NR = 350
Ftcxo/50 kHz=350
where Ftcxo=17.5 MHz
SM = 00
Reference select for main phase detector
EM = 1
Main divider enable flag
SA = 00
Reference select for aux. phase detector
EA = 0
Aux. divider enable flag
FMOD = 1 Selects modulo 8
LONG = 0 Send with 24 bit A0 format
D Word = 0xA1 0x5E 0x22
BITS 1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
0/1
ADDRESS
NR (REFERENCE DIVIDE)
= 350 FOR 50 kHz REFERENCE
SM (ALWAYS 00)
EM (ALWAYS 1)
SA (NOT USED)
EA (ALWAYS 0)
FMOD (1 = MODULUS 8, 0 = MODULUS 5)
LONG (0=24 BIT WORD)
Figure 3-2 D-WORD
June 1997
Part No. 001-3412-002
3-2
PROGRAMMING
3.2.4 B-WORD CALCULATION (24-BITS)
Lowest Tx Frequency
Highest Tx Frequency
Lowest Rx Frequency
Highest Rx Frequency
The B-Word programs the Fractional-N charge
pump current setting factor, the Binary acceleration
factors (CL/CK) and prescaler modulus.
The value of CN should be interpolated for frequencies between the band edges. The recommended
value range of CN provides the fractional spurious
rejection required to meet adjacent channel specifications. The CN values could be changed on a channelby-channel basis for ultimate rejection of the Fractional-N spurious responses close to the carrier frequency. The DM-3412 has an adjustment (R823) for
fractional compensation current. The factory preset
value of R823 allows CN to be set to the following
ranges:
CN = (8-bit)
86
90
96
100
(Frequency dependent)
(86-90 Tx) (96-100 Rx)
Binary acceleration factor for integral
charge pump
Binary acceleration factor for
proportional charge pump
Select modulus 2 prescaler (64/65)
CK = 0000
CL = 00
PR = 01
B-Word = 0x80 (8-bit CN) 0x02
BITS 1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
ADDRESS
NOT USED
(ALWAYS 0000)
CN
(CHARGE PUMP CURRENT SETTING)
(CHANNEL DEPENDENT)
CL
CK
BINARY ACCELERATION
FACTOR (ALWAYS 000000)
PR (PRESCALER TYPE) (01=DUAL MODULUS)
Figure 3-3 B-WORD
3-3
June 1997
Part No. 001-3412-002
PROGRAMMING
3.2.5 A0-WORD CALCULATION (24-BITS)
below the comparison frequency (FCM), i.e. frequencies that are not divisible by FCM. When the D-word is
programmed with FMOD = 8, and NR = 350 as
described in Section 3.2.2, the fractional increment is:
50 kHz ÷ 8 = 6.25 kHz.
FCM = Ftcxo ÷ NR = 17.5 MHz ÷ 350 = 50 kHz
The synthesizer resolution (min. step) is 6.25 kHz.
The A0-Word is sent last (see Figure 3-4). The
A0-Word contains the data for the loop dividers and is
programmed on a channel-by-channel basis. The
Fractional-N (NF) word is a 3-bit word that programs
the synthesizer to the fractional steps determined by
the fractional modulus selection flag FMOD
(1 = modulus 8) and the loop comparison frequency
(50 kHz). The frequency resolution is:
50 kHz ÷ 8 = 6.25 kHz.
NF= (3-bits)*
Example Calculation:
Program the transceiver to receive at 457.01875 MHz:
RX = 457.01875 MHz
LO = RX + 52.95 MHz = 509.96875 MHz
(LO is high-side injection)
Fractional increment for modulus 8
(3-bits)
N = LO ÷ FCM = 509.96875 ÷ 0.05 = 10199 (integer)
NM1=(12-bits)* Number of main divide cycles when
prescaler modulus equals 64 (12-bits)
NM2 = 64 x FRAC [N ÷ 64]
= 64 x FRAC [10199 ÷ 64]
= 64 x 0.359375
= 23
NM2=(8-bits)* Number of main divide cycles when
prescaler modulus equals 65
(4-bits, PR=01)
NM1 = INTEGER [N ÷ 64] - 2 - NM2
= 159 - 2 - 23
= 134
NM3=(4-bits)* Number of main divide cycles when
prescaler modulus equals 72
(4 bits, PR=10)
NOTE: NM3 is not used because
dual modulus is selected by PR=01.
NF = 18.75 kHz ÷ 6.25 kHz = 3
* Indicates frequency/channel dependant variable.
NOTE: Channel steps of 10 kHz can also be achieved by
setting the Fractional-N modulus flag (FMOD) in the Dword to "0" which sets FMOD to 5. NR remains set to
350. This produces 10 kHz steps as NF is incremented.
The Fractional-N increment (NF) is a 3-bit word
that is channel dependant. NF is used to program the
synthesizer to channels (frequency steps) that are
BITS 1
ADDRESS
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
NF
NM1
(NUMBER OF MAIN DIVIDER CYCLES
WHEN PRESCALER MODULUS = 64)
Figure 3-4 A0-WORD
June 1997
Part No. 001-3412-002
3-4
NM2
(NUMBER OF MAIN DIVIDER CYCLES
WHEN PRESCALER MODULUS = 65)
PROGRAMMING
D23
D0
PR="01"
NM2
A0
NF
NM1
NM3
1 0
0 0
1 0
0 1
1 0
1 0
1 1
1 1
0 0
CN
CK
NA
PA
NR
NM2
CL
PR
SM EM SA EA
0 0 T1 T0
PR="10"
F L
M O
O N
D G
24
ADDRESS BITS
TEST BITS
NOTE: C-Word and E-Word are not used in Synthesizer load.
NOTE: Bit 24 is shifted out first.
Figure 3-5 SERIAL INPUT WORD FORMAT
3-5
June 1997
Part No. 001-3412-002
PROGRAMMING
3.3 RECEIVE TO TRANSMIT SEQUENCE
3.4 TRANSMIT TO RECEIVE SEQUENCE
1. Synthesizer is loaded (24-bit D, B and A0). Refer
to Figure 3-6.
1. TX_EN is turned OFF. This signal is shaped. Refer
to Figure 3-7.
2. The state of the RX_EN line does not have to be
changed until the last bit is sent. However, receive
will cease as soon as it is changed.
2. The synthesizer load process could begin slightly
before, but when the last bit is strobed in the synthesizer it will become unlocked.
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.
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.
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.
RX_EN
DATA
D0
D24
"D" WORD
D0
D24
"B" WORD
D0
D24
"A" WORD
CLOCK
SYNTH_EN
RX_EN
9V TX
DATA
D0
D24
"D" WORD
D0
D24
"B" WORD
D0
D24
t=0
"A" WORD
TX_EN
RAMPDOWN
SPEEDUP
CLOCK
SYNTH_EN
Figure 3-7 TX TO RX TIMING DIAGRAM
9V TX
SPEEDUP
RAMP-UP
4. For quickest lock times the SYNTH ENABLE line
on the last load word should be held high for 2 to 3
milliseconds. It MUST NOT be left high as the synthesizer in the SPEEDUP mode has poor noise performance and would degrade the receiver
performance.
LOCK
TX_EN
t=0
Figure 3-6 RX TO TX TIMING DIAGRAM
Speedup is 2 to 3 ms
Lock is approximately 7 ms
Ramp is approximately 3 ms
Dekey is approximately 3 ms
"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 interference
caused by spectral spreading (sinx/x) when the transmitter is keyed. The Ramp-Up time is approximately
3 ms.
June 1997
Part No. 001-3412-002
"Ramp-Down" is the amount of time required for
the transmitter output power to be reduced before
switching off the transmitter and enabling the receive
with the RX_EN. The Ramp-Down circuitry (located
on the transceiver) minimizes adjacent channel interference caused by spectral spreading (sinx/x) when the
transmitter is un-keyed. The Ramp-Down time is
approximately 3 ms.
3-6
PROGRAMMING
IMPORTANT
Clock (max.)
Diag Enable (min)
XX
If the receiver is to be operated at 510-512 MHz (-810),
a spurious condition may occur to degrade the receiver
sensitivity 2 to 3 dB. If this degradation is unacceptable, the synthesizer can be reprogrammed to a comparison frequency (FCM) of 31.25 kHz (so that a
multiple of this would not be 52.95 MHz) and a modulus (FMOD) of 5 with a reference divide (NR) of 560.
These parameters place the spurious at harmonics of
31.25 kHz (instead of 50 kHz) outside the passband of
the IF filters where the sensitivity is not degraded.
1 MHz
250 ns (min)
Don’t Care
DAC Bits:
A1 - A0 = DAC Output Select
00=Power Set
(Data=0xFF for now,
RNG=1)
01=Mod Adj
(Data=0xFF for now,
RNG=1)
11=DAC Control Select (Data=0xFF for DAC Control)
3.5 RADIO DIAGNOSTICS
RNG = Range Select (max. output) (Ref = 5.5V÷2)
0 = 1 x Ref
1 = 2 x Ref
The diagnostic features allow the user to program
a Digital-To-Analog Converter (DAC) to adjust RF
output power and modulation flatness without removing the radio from the enclosure. Bit "ao" can be set
to provide an analog voltage representative of the forward and reverse RF power at the radio interface connector J201, pin 14.
D7 - D0 = D/A Data
0x00 = 0.0V
0xFF = 1 x Ref (RNG=0)
0xFF = approx. 2 x Ref (RNG=1)
Shift Register Bits:
This feature can be used to monitor the condition
of the transceiver and antenna/feedline. Figure 3-8 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.
XX
XX
XX
XX
XX
A1
A0
Rng
D7
D6
D5
a0 = Diagnostic Select to J201, pin 14 (Analog Voltage)
0 = Forward Power
1 = Reverse Power
D4
D3
D2
D1
D0
XX
XX
XX
XX
XX
XX
XX
ao
Data
MSB (23)
LSB (00)
Clock
Diag En
Figure 3-8 DIAGNOSTIC SERIAL DATA STREAM
3-7
June 1997
Part No. 001-3412-002
PROGRAMMING
This page intentionally left blank.
June 1997
Part No. 001-3412-002
3-8
SECTION 4 CIRCUIT DESCRIPTION
4.1 GENERAL
4.1.3 RECEIVER
The receiver is a double-conversion type with
intermediate frequencies of 52.95 MHz / 450 kHz.
Two helical bandpass filters reject the image, half IF,
injection, and other unwanted frequencies. A fourpole crystal filter and an 8-pole ceramic filter enhance
receiver selectivity
4.1.1 INTRODUCTION
The main subassemblies of this transceiver are
the RF board, VCO board, TCXO and Loader board.
A block diagram of the transceiver is located in Figure
4-1. The 3412 is also available in transmit only and
receive only models.
4.1.4 TRANSMITTER
The transmitter produces a nominal RF power
output of 5W at 13.6V 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 or customer-supplied
equipment.
The VCO board is enclosed by a metal shield and
soldered directly to the RF board. The VCO is not
serviceable.
The 3412 has a reference oscillator stability of
±1.5 PPM. The 17.5 MHz TCXO (Temperature Compensated Crystal Oscillator) is soldered directly to the
RF board. The TCXO is not serviceable.
4.1.5 LOADER BOARD
The Loader board, Part No. 023-3240-330, is a
plug-in circuit board used to load the synthesizer with
a desired frequency and filters data/audio to and from
the user interface connector. See Section 1.2.2.
4.1.2 SYNTHESIZER
The VCO (voltage-controlled oscillator) output
signal is the receiver first injection frequency in the
Receive mode and the transmit frequency in the
Transmit mode. The first injection frequency is
52.95 MHz above the receive frequency. The frequency of this oscillator is controlled by a DC voltage
produced by the phase detector in synthesizer chip
U811.
4.2 SYNTHESIZER
A block diagram of the transceiver is shown in
Figure 4-1 and a block diagram of Synthesizer IC
U811 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 U811. 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.
Channels are selected by programming counters
in U811 to divide by a certain number. This programming 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
or user supplied hardware/software (see Section 3).
Programming of the synthesizer provides the data
necessary for the internal prescaler and counters. One
input signal is the reference frequency. This frequency
is produced by the 17.5 MHz reference oscillator
(TCXO). The other input signal is the VCO
frequency.
The frequency stability of the synthesizer in both
the receive and transmit modes is established by the
stability of the reference oscillator described in the
preceding section. These oscillators are stable over a
temperature range of -30° to +60° C (-22° to +140° F).
4-1
June 1997
Part No. 001-3412-002
CIRCUIT DESCRIPTION
RF BPF
RF AMP
RF BPF
Z201
Q201/Q202
Z202
RECEIVER
MIXER
U221
52.95 MHz
BUFFER CRYSTAL FILTER
Q211
Z221/Z222
IF AMP
IF / 450 kHz FILTER
Q231
U241
2nd LO TRIPLER/AMP
1st LO AMP
Q401
Q301
PWR SET
U913A
U911
U581A
TRANSMITTER
V FWD
V REV
Q531/U111C
U912
U913C
U581B
ANTENNA
SWITCH
PREDRIVER
Q511
LOW-PASS
FILTER
U521
CR561/562
DIAG
DATA
TX EN
DIAG EN
CLOCK
RX OUT
DIAG
DIAG EN
TX EN
RX OUT
Q101/Q102
U111A/B/D
Q124
+9V TX
RX AUDIO
U261
RSSI
RSSI
MOD ADJ
RSSI
Q131/U131
U141
+5V DC
SHUTDOWN
Y801
TCXO
Q701
TX IN
Q501
Q172
Q173
+9.6V
RECEIVE
Q121
Q122
Q123
+13.3V
SWITCHED
RX EN
RF OUT
VCO
+5.5V
+9.6V
BUFFER/
AMPLIFIER
Q853
+4.6V
Q171
Q841, Q842
Q901, Q902
T/R PS
CLV
U811
-2.0V
DATA
VCO
Q850
Q851/Q852
AMPLIFIER
CLOCK
MOD INPUT
LOCK
MOD ADJUST
ENABLE
TEST RF IN
+13.3V
Q801
SYNTHESIZER
SYNTH OUT
Figure 4-1 TRANSCEIVER BLOCK DIAGRAM
June 1997
Part No. 001-3412-002
4-2
CIRCUIT DESCRIPTION
CLOCK
DATA
STROBE
SERIAL INPUT + PROGRAM LATCHES
PR
Vss
NM1
NM2
NM3
FB
FB
EM
RF
IN
RF
IN
64/65/72
PRESCALER
VDD
12
FMOD
NF
FRACTIONAL
ACCUMULATOR
MAIN DIVIDERS
PRESCALER
MODULUS
CONTROL
RF
RN
CN
TEST
EM
SM
NR
EM+EA
NORMAL
OUTPUT
CHARGE
PUMP
MAIN
PHASE
DETECTOR
CL
CK
REFERENCE DIVIDER
SA
PA
EA
PHP
SPEED-UP
OUTPUT
CHARGE
PUMP
MAIN
REFERENCE
SELECT
12
REF
IN
AUX
IN
NA
EA
+2
+2
INTEGRAL
OUTPUT
CHARGE
PUMP
+2
RA
SECONDARY
REFERENCE
SELECT
AUXILIARY
PHASE
DETECTOR
AUXILIARY
OUTPUT
CHARGE
PUMP
PHA
LOCK
12
1/4
PRESCALER
PHI
AUXILIARY DIVIDER
DDA
VSSA
Figure 4-2 U801 SYNTHESIZER BLOCK DIAGRAM
4.2.1 VOLTAGE-CONTROLLED OSCILLATOR
Frequency Control and Modulation
Oscillator (Q850)
The VCO frequency is controlled in part by DC
voltage across varactor diodes CR854, CR855, CR856
and CR851. As voltage across a reverse-biased varactor diode increases, its capacitance decreases. Therefore, VCO frequency increases as the control voltage
increases. CR854/CR855 and CR856/CR851 are paralleled varactors to divide the capacitance and
improve linearity. The varactors are biased at -2.0V
so the control line can operate closer to ground. The
control line is isolated from tank circuit RF by choke
L851/L854 and decoupling capacitor C854. The
amount of frequency change produced by CR854/
CR855/CR856/CR851 is controlled by series capacitor C853.
The VCO is formed by Q850, several capacitors
and varactor diodes, and ceramic resonator Z850. It
oscillates at the transmit frequency in transmit mode
and first injection frequency in the receive mode (380512 MHz in transmit and 432.950-564.950 MHz in
receive).
Biasing of Q850 is provided by R862, R867,
RC=867 and R868. An AC voltage divider formed by
C859, C861 and C862 initiates and maintains oscillation and also matches Q850 to the tank circuit.
Ceramic resonator Z850 is grounded at one end to provide shunt inductance to the tank circuit.
4-3
June 1997
Part No. 001-3412-002
CIRCUIT DESCRIPTION
The -2.0V applied to the VCO is derived from
the 17.5 MHz TCXO frequency that is amplified by
Q701, rectified by CR701 and filtered by C706, C707,
C708 and C709 on the RF board.
4.2.3 CASCODE AMPLIFIERS/VCO (Q851/Q852)
Q851/Q852 form a cascode amplifier to provide
reverse isolation for the VCO. Q851 is configured as
a common emitter and Q852 as a common base. The
output signal is taken from the collector of Q851 and
coupled to the base of amplifier Q853 through coupling capacitors C868, C871 and a PI-attenuator made
up of R859 and R875.
The VCO frequency is modulated using a similar
method. The transmit audio/data signal from J201,
pin 6 is applied across varactor diode CR852 which
varies the VCO frequency at an audio rate. Series
capacitors C856/C870 couple the VCO to CR852.
R854 provides a DC ground on the anodes of CR852/
CR853, and isolation is provided by R852 and C855.
C858 is an RF bypass. C853 provides isolation.
4.2.4 AMPLIFIER (Q853)
Amplifier Q853 provides final amplification of
the VCO signal. Bias for Q853 is provided by R871,
R872 and R874. L856/C874 provide a match to the
transmitter and first injection frequency. The T-pad
attenuator made up of R892, R893 and R894 provides
6 dB of isolation between the transmitter and first
injection frequency.
The DC voltage across CR853 provides compensation to keep modulation relatively flat over the
entire bandwidth of the VCO. This compensation is
required because modulation tends to increase as the
VCO frequency gets higher (capacitance of CR854/
CR855/CR856/CR851 gets lower). CR853 also balances the modulation signals applied to the VCO and
TCXO. The DIAG on J201, pin 14 can also adjust the
modulation.
4.2.5 VOLTAGE FILTER (Q901)
Q901 on the RF board is a capacitance multiplier
to provide filtering of the 4.6V supply to the VCO.
R901 provides transistor bias and C901 provides the
capacitance that is multiplied. If a noise pulse or other
voltage change appears on the collector, the base voltage does not change significantly because of C901.
Therefore, base current does not change and transistor
current remains constant. CR901 decreases the charge
time of C901 when power is turned on. This shortens
the start-up time of the VCO. C902 and C903 are RF
decoupling capacitors.
The DC voltage applied across CR853 comes
from the modulation adjust control R827 on the RF
board. R826 applies a DC biasing voltage to CR852;
C821 provides DC blocking. RF isolation is provided
by C858, R853 and R847.
4.2.2 VCO AND REFERENCE OSCILLATOR
MODULATION
Both the VCO and reference oscillator (TCXO)
are modulated in order to achieve the required frequency response. If only the VCO were modulated,
the phase detector in U811 would sense the frequency
change and increase or decrease the VCO control voltage to counteract the change (especially at the lower
audio frequencies).
4.2.6 VCO FREQUENCY SHIFT (Q841)
The VCO must be capable of producing frequencies from 403-564.95 MHz to produce the required
receive injection and transmit frequencies. If this
large of a shift was achieved by varying the VCO control voltage, the VCO gain would be undesirably high.
Therefore, capacitance is switched in and out of the
tank circuit to provide a coarse shift in frequency.
If only the reference oscillator frequency is modulated, the VCO frequency would not change fast
enough (especially at the higher audio frequencies).
Modulating both VCO and reference oscillators produces a flat audio response. Potentiometers R825,
R826 and R827 set the VCO modulation sensitivity so
that it is equal to the reference oscillator modulation
sensitivity.
June 1997
Part No. 001-3412-002
This switching is controlled by the T/R pin shift
(RX_EN) on J201, pin 4, Q841/Q842 and pin diode
CR850. When a pin diode is forward biased, it presents a vary low impedance to RF; and when it is
reverse biased, it presents a very high impedance. The
capacitive leg is switched in when in transmit and out
when in receive.
4-4
CIRCUIT DESCRIPTION
When J201, pin 4 is high in receive (+3-16V),
Q173 is turned on and the collector voltage goes low.
A low on the base of Q172 turns the transistor on and
the regulated +9.6V on the emitter is on the collector
for the receive circuitry. Q171 applies a low on the
base of Q841, the transistor is off and the collector is
high. With a high on the base of Q842 and a low on
the emitter, this reverse biases CR850 for a high
impedance.
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 DETECT
When the synthesizer is locked on frequency, the
SYNTH LOCK output of U811, pin 18 (J201, pin 7) is
a high voltage. When the synthesizer is unlocked, the
output is a low voltage. Lock is defined as a phase
difference of less than 1 cycle of the TCXO.
The capacitive leg on the VCO board is formed
by C851, CR850, C852 and C876. When J201, pin 4
is low in transmit, Q842 is turned on and a high is on
the emitter, Q171 is turned off and the collector voltage goes high. A low on the base of Q173 turns the
transistor off and the regulated +9.6V is removed from
the receive circuitry. With a high on the base of Q841
the transistor is on and the collector is low. With a
low on the collector of Q842 and a high on the emitter, this forward biases CR850 and provides an RF
ground through C851 and C852/C876 are effectively
connected to the tank circuit. This decreases the resonant frequency of the tank circuit.
4.3 RECEIVER CIRCUIT DESCRIPTION
4.3.1 HELICAL FILTER (Z201), RF AMPLIFIER
(Q201)
Capacitor C205 couples the receive signal from
the antenna switch to helical filter Z201. (The antenna
switch is described in Section 4.4.4.) Z201 is a bandpass filter tuned to pass only a narrow band of frequencies to the receiver. This attenuates the image
and other unwanted frequencies. The helicals are factory set and should not be tuned.
4.2.7 SYNTHESIZER IC (U811)
Introduction
Synthesizer chip U811 is shown in Figure 4-2.
This device contains the following circuits: R (reference), Fractional-N, NM1 and NM2; phase and lock
detectors, prescaler and counter programming
circuitry. The basic operation was described in
Section 4.2.1.
Frequencies are selected by programming the R,
Fractional-N, NM1 and NM2 in U811 to divide by a
certain number. These counters are programmed by
Loader board or a user supplied programming circuit.
More information on programming is located in
Section 3.
Impedance matching between the helical filter
and RF amplifier Q202 is provided by C206, C207
and L201. CR231 protects the base-emitter junction of
Q202 from excessive negative voltages that may occur
during high signal conditions. Q201 is a switched
constant current source which provides a base bias for
Q202. Q201 base bias is provided by R202/R203.
Current flows through R201 so that the voltage across
it equals the voltage across R202 (minus the base/
emitter drop of Q201). In the transmit mode the
receive +9.6V is removed and Q201 is off. This
removes the bias from Q202 and disables the RF
amplifier in transmit mode. This prevents noise and
RF from being amplified by Q202 and fed back on the
first injection line.
As previously stated, the counter divide numbers
are chosen so that when the VCO is oscillating on the
correct frequency, the VCO-derived input to the phase
detector is the same frequency as the reference oscillator-derived frequency.
Additional filtering of the receive signal is provided by Z202. L202, C208 and C209 provide impedance matching between Q202 and Z202. Resistor
R205 is used to lower the Q of L202 to make it less
frequency selective.
Channel Programming
4-5
June 1997
Part No. 001-3412-002
CIRCUIT DESCRIPTION
4.3.2 MIXER (U211)
C404 decouple RF from the amplifier. L401, L402,
C405, C406 and C407 pass the third harmonic
(52.5 MHz) to the input of U241, pin 4. The output of
the amplifier is coupled to U241, pin 4 by C408, C409
and L403 form a 450 kHz notch.
First mixer U211 mixes the receive frequency
with the first injection frequency to produce the
52.95 MHz first IF. Since high-side injection is used,
the injection frequency is 52.95 MHz above the
receive frequency. The RF signal is coupled to the
mixer through C215
4.3.6 SECOND MIXER/DETECTOR (U241)
4.3.3 FIRST LO AMPLIFIER (Q301)
Oscillator and Mixer
The first injection frequency from the VCO is
coupled to the first local oscillator amplifier Q301
through C301. L301/C302 match Q301 to the VCO.
Bias for Q301 is provided by R301, R302 and R303,
R306 and C307. Impedance matching to the mixer is
provided by L302, R305 and C306 decouples RF signals.
As shown in Figure 4-3, U241 contains the second oscillator, second mixer, limiter, detector, and
squelch circuitry. The 52.95 MHz IF signal is mixed
with a 52.5 MHz signal produced by second LO
amplifier/tripler Q401 from TCXO Y801.
4.3.4 BUFFER (Q211), CRYSTAL FILTER (Z221/
Z222), IF AMP (Q231)
C234
52.95 MHz
MIXER
20
The output of U221 is coupled to buffer Q211.
C213, R213 and Q211 match the 50 ohm output of
U221. Bias for Q211 is provided by R211 and R213.
The output of Q211 is matched to crystal filter Z221
via L211, C214 and R212.
C267
18
NC
52.5 MHz
RSSI OUTPUT
OSCILLATOR
17
IF AMP
16
RSSI
MIXER OUT
IF DEC2
IF AMP IN
IF DEC1
IF AMP OUT
15
VCC
Z221 and Z222 form a 2-section, 4-pole crystal
filter with a center frequency of 52.95 MHz and a
-3 dB passband of 8 kHz (12.5 kHz BW) or 15 kHz
(25 kHz BW). This filter establishes the receiver
selectivity by attenuating the adjacent channel and
other signals close to the receive frequency. C221,
C222, and L221 adjust the coupling of the filter.
L222, C223 and C233 provide impedance matching
between the filter and Q231.
AUDIO FB
AUDIO OUTPUT
RSSI FB
V REG
14
LIMITER
10
13
12
QUAD
11
LIMITER IN
LIMITER DEC1
LIMITER DEC2
LIMITER OUT
L253
Figure 4-3 U241 BLOCK DIAGRAM
IF amplifier Q231 amplifies the 52.95 MHz IF
signal to recover filter losses and improves receiver
sensitivity. Biasing for Q231 is provided by R231,
R232, R233, R234 and R235 and C232, C235 decouple RF signals. The output of Q231 is coupled to the
detector by C234.
Second IF Filter
The output of the internal double-balanced mixer
is the difference between 52.95 MHz and 52.5 MHz
which is 450 kHz. This 450 kHz signal is fed out on
pin 20 and filtered by IF filter Z251. The filtered signal is fed back into U241 on pin 18 to an internal IF
amplifier. After amplification the signal is fed out on
pin 16 where it is filtered by Z252 and then fed back
into U241, pin 14 to the limiter.
4.3.5 SECOND LO AMP/TRIPLER (Q401)
The input frequency to Q401 is 17.5 MHz from
TCXO Y801 coupled through C402. Bias for Q401 is
provided by R401, R402, R403 and R404. C403,
June 1997
Part No. 001-3412-002
19
4-6
CIRCUIT DESCRIPTION
Limiter-Amplifier
and isolation. Q501 provides amplification and additional isolation between the VCO and transmitter.
Biasing for this stage is provided by R504 and R505,
and decoupling of RF signals is provided by C503 .
Impedance matching to the predriver is provided by
L511 and C512.
The output of Z252 is applied to a limiter-amplifier circuit in U241. This circuit amplifies the 450
kHz signal and any noise present; then limits this signal to a specific value. When the 450 kHz signal level
is high, noise pulses tend to get clipped off by the limiter; however, when the 450 kHz signal level is low,
the noise passes through the limiter. C275/C276
decouple the 450 kHz signal.
4.4.2 PRE-DRIVER (Q511)
Pre-driver Q511 is biased Class A by R511,
R512, R513 and R515. L513, C517 and C518 match
Q511 to U521. R514 provides a resistive feedback
path to stabilize Q511 and C515 provides DC blocking. C516 bypasses RF from the DC line, and R513
provides supply voltage isolation and ties the +9V
transmit supply to the circuit.
Quadrature Detector
From the limiter stage the signal is fed to the
quadrature detector. An external phase-shift network
connected to pin 8 shifts the phase of one of the detector inputs 90° at 450 kHz (all other inputs are
unshifted in phase). When modulation occurs, the frequency of the IF signal changes at an audio rate as
does the phase of the shifted input. The detector,
which has no output with a 90° phase shift, converts
this phase shift into an audio signal. L253 is tuned to
provide maximum undistorted output from the detector. R255 is used to lower the Q of L253. From the
detector the audio and data signal is fed out on pin 8.
4.4.3 FINAL (U521), COMPARATOR (U111C)
RF module U521 has an RF output of 1 to 5W
and operates on an input voltage from 10-16V.
Power control is provided by U581, U111, Q531
and a stripline directional coupler. The power is
adjusted by Power Set Control of U911 by R535 that
provides a reference voltage to U111C. U111C drives
Q531 and PA module U521.
Audio/Data Amplifier
The audio/data output of U241, pin 8 is fed to the
audio amplifier U261. U261 amplifies and inverts the
detected audio/data signal and shifts the DC bias level
to +2.5V DC at the output on pin 13. The gain is set at
approximately 2.5 by R262/R263. R264/R265 provide a 1.3V DC reference bias voltage for U241. The
audio output of U261 is applied to J201, pin 13.
One end of the stripline directional coupler is
connected to a forward RF peak detector formed by
R591, CR591, C591 and U581A. The other end of the
stripline directional coupler is connected to a reverse
RF peak detector formed by R593, CR592, C593 and
U581B.
Receive Signal Strength Indicator (RSSI)
If the power output of U521 decreases due to
temperature variations, etc., the forward peak detector
voltage drops. This detector voltage drop is buffered
by U581A and applied to inverting amplifier U111C
which increases the forward bias on Q531. The
increase on Q531 increases the power output level of
U521. If the power output of U521 increases, the forward peak detector voltage increases and U111C
decreases the forward bias on Q531. The decrease on
Q531 decreases the output power of U521.
U241, 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.
4.4 TRANSMITTER CIRCUIT DESCRIPTION
4.4.1 BUFFER (Q501)
The VCO RF output signal is applied to R892,
R893 and R894 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
R501, R502, and R503. This pad provides attenuation
The output of CR591 and CR592 are fed to
U581A/B respectively. If the output of either buffer
increases, the increase is applied to the inverting input
of U111C. The output of U111C then decreases and
4-7
June 1997
Part No. 001-3412-002
CIRCUIT DESCRIPTION
Q531 decreases the input voltage to U521 to lower the
power. The control voltage is isolated from RF by ferrite bead EP532 and C531 decouples RF.
during key-up. The conditioning provides a stable
5.5V output by balancing the 5.5V reference with the
5.5V regulated supply.
The forward/reverse power voltages from
U581A/B are also applied to U913 for Diagnostic outputs on J201, pin 14.
The output on U111B, pin 7 is applied to the noninverting input of comparator U111D, pin 12. The
output of U111D, pin 14 is applied to the base of current source Q124. The output of Q124 is on the emitter and is applied back to the inverting input of comparator U111D, pin 13. A decrease or increase at
U111D, pin 13 causes a correction by U111D to stabilize the 9V transmit output. R125/R126 establishes
the reference voltage on U111D, pin 13. C123 provides RF bypass, C124 provides RF decoupling and
C125 stabilizes the output. The 9V transmit voltage is
then distributed to the circuits.
The low-pass filter consists of C552, L551,
C553, L552, C554, L553, C555, L554 and C556. The
filter attenuates spurious frequencies occurring above
the transmit frequency band. The transmit signal is
then fed through the antenna switch to antenna jack
J501.
4.4.4 ANTENNA SWITCH (CR561, CR562)
The antenna switching circuit switches the
antenna to the receiver in the receive mode and the
transmitter in the transmit mode. In the transmit
mode, +9V is applied to L555 and current flows
through diode CR561, L561, diode CR562, and R561.
When a diode is forward biased, it presents a low
impedance to the RF signal; conversely, when it is
reverse biased (or not conducting), it presents a high
impedance (small capacitance). Therefore, when
CR561 is forward biased, the transmit signal has a
low-impedance path to the antenna through coupling
capacitor C562.
4.5 VOLTAGE REGULATORS
4.5.1 +9.6 AND +5.5V REGULATED
The +5-16V applied on J201, pin 5 is applied to
the base of Q131 turning the transistor on. This
causes the collector to go low and applies a low to the
control line of U131, pin 2 and R132 provides supply
voltage isolation. The 13.3V from J201, pin 2 is on
U131, pin 6 to produce a +5.5V reference output on
U131, pin 4. C132 stabilizes the voltage and C131/
C133 provide RF decoupling. C134 provides RF
bypass and C136 provides RF decoupling. C135
helps to stabilize the voltage when the +5.5V supply
first turned on.
C583, L561, and C564 form a discrete quarterwave line. When CR561 is forward biased, this quarter-wave line is effectively AC grounded on one end
by C564. When a quarter-wave line is grounded on
one end, the other end presents a high impedance to
the quarter-wave frequency. This blocks the transmit
signal from the receiver. C561/C562 matches the
antenna to 50 ohms in transmit and receive.
The low from the collector of Q131 is also
applied to the control line of U141, pin 2. The 13.3V
from J201, pin 2 is on U141, pin 6 to produce a +9.6V
output on U141, pin 4. C144 provides RF bypass and
C146 provides RF decoupling. C145 helps to stabilize
the voltage when the +9.6V supply first turned on.
4.4.5 TRANSMIT KEY-UP CONTROL
Q121, Q122 and Q123 act as switches which turn
on with the RX_EN line. When the line goes low
Q121 is turned off, which turns Q122 on, turning
Q123 on. This applies 13.6V to U111 before the
TX_EN line goes high.
U111A/B provide the key-up and key-down conditioning circuit. C116 and R117 provide a ramp-up
and ramp-down of the 9V transmit supply during keyup and key-down which reduces load pull of the VCO
June 1997
Part No. 001-3412-002
4-8
SECTION 5 SERVICING
5.1 GENERAL
5.2 SYNTHESIZER SERVICING
5.1.1 PERIODIC CHECKS
5.2.1 INTRODUCTION
This transceiver should be put on a regular maintenance schedule and an accurate performance record
maintained. Important checks are receiver sensitivity
and transmitter frequency, modulation, and power output. A procedure for these and other tests is located in
Section 6. It is recommended that transceiver performance be checked annually even though periodic
checks are not required by the FCC. During the first
year, make an additional check or two to ensure no
TCXO frequency drifting has occurred.
When there is a synthesizer malfunction, the
VCO is not locked on frequency. When an unlocked
VCO is detected by the lock detector circuit, U801,
pin 18 goes low (0V).
NOTE: The user-supplied circuitry must disable the
transmitter and receiver when an out-of-lock condition is indicated.
When the VCO is unlocked, the fR and fV inputs
to the phase detector are not in phase (see Section
4.1.2). The phase detector in U801 then causes the
VCO control voltage to go to the high or low end of
its operating range. This in turn causes the VCO to
oscillate at the high or low end of its frequency range.
5.1.2 SURFACE-MOUNTED COMPONENTS
A large number of the components used on the
transceiver board are the surface-mounted type. Since
these components are relatively small in size and are
soldered directly to the PC board, care must be used
when they are replaced to prevent damage to the component or PC board. Surface-mounted components
should not be reused because they may be damaged by
the unsoldering process.
As shown in Figure 4-1, a loop is formed by
VCO Q850, amplifier Q851/Q852, and the RF IN of
U801. Therefore, if any of these components begin to
malfunction, improper signals appear throughout the
loop. However, correct operation of the counters can
still be verified by measuring the input and output frequencies to check the divide number.
5.1.3 SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS
Proceed as follows to check the synthesizer I/O
signals to determine if it is operating properly.
Schematic diagrams and component layouts of
the PC boards used in this transceiver are located in
Section 8. A component locator guide is also provided to aid in component location.
5.2.2 REFERENCE OSCILLATOR
Check the signal at U811, pin 8. It should be
17.5 MHz at a level of approximately 1V 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.
5.1.4 REPLACEMENT PARTS LIST
A replacement parts list with all the parts used in
this transceiver is located in Section 7. Parts are listed
alphanumerically according to designator. For information on ordering parts, refer to Section 1.8.
5.2.3 VCO
5.1.5 TCXO MODULE NOT SERVICEABLE
Output Level
The ±1.5 PPM TCXO module is not field serviceable. Part changes require a factory recalibration
to ensure that the oscillator stays within its ±1.5 PPM
tolerance.
The output level of Q853 can be measured with
an RF voltmeter or some other type of high impedance
meter. The minimum level after a power splitter at
R893 should be -10 dBm.
5-1
June 1997
Part No. 001-3412-002
SERVICING
Control Voltage
5.3.2 MIXER/DETECTOR (U241)
Check the DC voltage at TP831 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).
Data Output
Using a .01 µF coupling capacitor, inject a
52.95 MHz, 1 mV signal, modulated with 1 kHz at
± 3 kHz deviation at U241, pin 1. The signal output at
U241, pin 8 should be approximately 150 mV P-P.
Output Frequency
NOTE: This signal consists of the 1 kHz modulation
and harmonics of 450 kHz.
Check the VCO frequency at R893. 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.
RSSI Output
The RSSI output on J201, pin 12 should be
<900 mV DC with no signal applied, and >2.3V DC
with a 1 mV input signal.
5.2.4 SYNTHESIZER (U801)
Lock Detector
START
When the VCO is locked on frequency, the lock
detect output on J201, pin 7 should be high.
MEASURE CURRENT
AND VOLTAGES
REFER TO SECTION 5.3
NO
OK
CHECK FUSES AND
WIRE HARNESS CONNECTIONS
YES
5.3 RECEIVER SERVICING
CHECK MIXER/
DETECT CIRCUIT
To isolate a receiver problem to a specific section, refer to the troubleshooting flowchart in Figure
5-1. Tests referenced in the flowchart are described in
the following information.
REFER TO SECTION 5.3.2
CHECK DATA
OUTPUT
REFER TO SECTION 5.3.2
OK
NOTE: Supply voltages are provided by the user.
NO
CHECK
U241
YES
5.3.1 SUPPLY VOLTAGES AND CURRENT
CHECK AUDIO
CIRCUIT
REFER TO SECTION 5.3.4
REFER TO SECTION 5.3.3
Measure the supply voltages on the following
pins at interface connector J201:
OK
NO
REPLACE DEFECTIVE
COMPONENT
YES
REFER TO SECTION 5.3.6
Pin 2 - 13.3V DC nominal
Pin 3 - 0.0V DC while in Receive
Pin 4 - 3-16V DC in Receive Mode
Pin 5 - 3-16V DC
Pin 6 - 2.5V DC ±1%
CHECK BUFFERS
CRYSTAL FILTERS
OK
NO
REPAIR DEFECTIVE
STAGE
YES
Place a DC ammeter in the supply line to the
transceiver and the following maximum currents
should be measured:
CHECK RF AMP
FIRST MIXER
Figure 5-1 RECEIVER SERVICING
Pin 4 - 150 µA
June 1997
Part No. 001-3412-002
REFER TO SECTION 5.3.3
5-2
SERVICING
5.3.3 SECOND LO (Q401)
5.4 TRANSMITTER SERVICING
Verify the Second LO signal is present at U241,
pin 4. The Second LO should be at 52.50 MHz and
not less than 500 mV P-P.
5.4.1 SUPPLY VOLTAGES AND CURRENT
Measure the supply voltages on the following
pins of interface connector J201:
5.3.4 AUDIO BUFFER AMP (U261)
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 max
The Data output on J201, pin 13 should be 280700 mV P-P, with the preceding injection signal. If
these levels are not correct, verify proper adjustment
of L253 (see Section 6.3). The gain of U261 is 2.5 for
25 kHz radios and 5 for 12.5 kHz radios.
Place a DC ammeter in the supply line to the
transceiver and the following maximum currents
should be measured:
5.3.5 IF AMP (U231)
Pin 2 - 2.5A maximum
Pin 3 - 150 µA
Pin 5 - 150 µA
The IF Amp input signal is 52.95 MHz. This
amp provides approximately 15 dB of gain to U241.
5.4.2 VCO (A801)
5.3.6 BUFFER AMP (Q211), CRYSTAL FILTERS
1. Check VCO A801 for power output.
(Power output should be at least -10 dBm.)
Q211 buffers the 52.95 MHz IF signal and provides matching to the crystal filters Z221/Z222.
2. Check 9V Transmit (Q141, emitter).
5.3.7 MIXER (U211)
3. If 9V is not present check Q124, U111, Q121,
Q122, Q123, Q101 and Q102 (see Section 4.4.5).
The mixer converts the RF signal (380-512 MHz)
to 52.95 MHz. The Local Oscillator is provided by
the VCO and Q301. The level of the LO should be
approximately +3 dBm.
4. Check voltages on Buffer Q501.
Input = 1.5V DC
Output = 3.5V DC
5.3.8 LNA (Q202), HELICAL FILTERS
Power output should be at least 2 mW (+3 dBm) at
C504 (50 ohm point).
The LNA provides approximately 15 dB of gain
at 380-512 MHz. The helical filters Z201/Z202 have
approximately 2.5 dB of loss each. Q201 provides
active bias to Q201.
5.4.3 PRE-DRIVER (Q511)
1. Check voltages on Q511.
Collector = 8.6V DC
Base = 2.2V DC
Emitter = 1.6V DC w/o RF (2.2V DC with RF)
5.3.9 ANTENNA SWITCH
CR561, CR562, L561, C561 and C563 form a Pi
network antenna switch. CR561 and CR562 are
reversed biased in Receive Mode.
Power output should be at least 100 mW (+13 dBm)
at the junction of C517/L518 (50 ohm point).
5-3
June 1997
Part No. 001-3412-002
SERVICING
5.4.4 FINAL AMPLIFIER (U521)
START
1. Check the voltages on U521.
MEASURE
CURRENT AND
VOLTAGES
Pin 2 = 5.5V DC (varies with power setting)
Pin 3 = 5.0V DC
Pin 4 = 12.7V DC
OK
CHECK FUSES AND
NO
WIRE HARNESS CONNECTIONS
YES
MEASURE RF
OUTPUT POWER
Power output at C551 should be 7.5-8.0W (+38.7 to
+39 dBm).
WATTS
YES
CHECK DEVIATION
(SECTION 5.4.6)
NO
5.4.5 ANTENNA SWITCH (CR561/CR562)
REFER TO
SECTION 5.4.2
OK
CHECK PRE-DRIVER
NO
CHECK AUDIO
CIRCUITS
YES
1. Check the antenna switch voltages.
NO
CHECK A801
OK
CHECK FREQUENCY
(SECTION 5.4.7)
YES
CR561 = 8.6V DC
CR562 = 8.0V DC
NO
CHECK Q501
OK
REFER TO
SECTION 5.4.3
CHECK DRIVER
YES
TRANSMITTER
OK
The loss through the Antenna Switch should be 1.9
to 2.1 dB.
NO
CHECK Q511
CHECK TCXO
Y801
OFF FREQ
ADJUST OR
CHANGE TCXO
OK
YES
REFER TO
SECTION 5.4.4
CHECK
POWER MODULE
5.4.6 MODULATION INPUT (J201, PIN 6)
NO
CHECK U521
OK
1. Check for audio/data signals at J201, pin 6, Y801,
pin 1 and A801, pin 3.
YES
REFER TO
SECTION 5.4.5
5.4.7 TCXO (Y801)
CHECK
CR561/562
CHECK
ANTENNA SWITCH
NO
OK
1. Check Y801, pin 1 for 2.5V DC ±1%.
Figure 5-2 TRANSMITTER SERVICING
2. Adjust Y801 to set the transmitter to the frequency
of operation.
3. If the frequency cannot be set to the frequency of
operation, replace the TCXO.
June 1997
Part No. 001-3412-002
5-4
SECTION 6 ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
6.1 GENERAL
5. Connect a DC voltmeter at the junction of R833/
C836 (VCO pin 16) to measure the VCO control
line voltage for a meter reading of ≥ 0.75 and
≤ 5.00V DC (see Figure 6-4).
Receiver or transmitter alignment may be necessary if repairs are made that could affect tuning.
Alignment points diagrams are located in Figure 6-4
or component layouts are located in Section 8.
NOTE: These voltages will be approximately 0.50V
DC higher with the VCO cover off.
Fabricate test cables by referring to Figure 2-1.
This cable should include power and ground, a transmit keying switch that shorts the keying line to
ground, data input and data output. The test setup
must apply the various supply voltages and load the
synthesizer with channel information.
6. Unkey the transmitter.
6.3.2 TRANSMITTER AND FREQUENCY ALIGNMENT (OEM Not Using Diagnostics)
1. Connect the test setup shown in Figure 6-1. A DC
ammeter capable of measuring up to 3A should be
installed in the supply line. Set the input voltage for
+13.3V DC.
6.2 TEST EQUIPMENT
Modulation Analyzer, HP8901 or equivalent
RF Signal Generator, HP8656 or equivalent
Power Meter
Oscilloscope
Digital Multimeter
Power Supply, HP8264A or equivalent
Audio Analyzer, HP8903A or equivalent
Loader Board (PN 023-3240-330) or equivalent
2. Load the synthesizer with the channel frequency.
(Do not transmit for extended periods.)
3. Adjust R535 clockwise for 5.0W +0.5/-0.2W.
Power output should be between 4.0-6.0W with current less than 2.5A (subtract 30 mA if Loader Board
is used).
6.3 DL3412 TRANSCEIVER ONLY
6.3.1 VCO CONTROL VOLTAGE
1. Connect the test setup shown in Figure 6-1. Set the
power supply for +13.3V DC. See Figure 2-1 for
interface cable.
DC
VOLTMETER
COMMUNICATIONS
SERVICE MONITOR
5W, 50 OHM
DUMMY LOAD
WATTMETER
MODULATION
ANALYZER
2. Load the synthesizer with the channel frequency
(see Section 3.2).
3. Connect a DC voltmeter at the junction of R833/
C836 (VCO pin 16) to measure the VCO control
line voltage for a meter reading of ≥ 0.50 and
≤ 4.90V DC (see Figure 6-4).
+13.3V DC
POWER SUPPLY
0-1.5A
DC AMMETER
TX
RX
NOTE: These voltages will be approximately 0.50V
DC higher with the VCO cover off.
4. Adjust R535 fully counterclockwise and key the
transmitter.
Figure 6-1 TRANSMITTER TEST SETUP
6-1
June 1997
Part No. 001-3412-002
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
6.3.3 MODULATION ALIGNMENT
1. Check that R571 is installed and R572 is removed
on Revision 2 or earlier boards (see Figure 6-4).
1. Connect a DC voltmeter to the junction of R822/
R823 and adjust R823 for 2.10V DC ±0.05V DC
(see Figure 6-4).
2. Make sure input supply voltage equals +13.3V.
3. Arrow to the "mid" channel.
2. Inject a 100 Hz square-wave tone at approximately
0.35V P-P, biased at +2.5V DC on J201, pin 6.
4. Press F5 to key the transmitter (see Figure 6-2).
3. 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.
5. Adjust R535 fully clockwise for maximum power
output.
6. Adjust the DAC value using PgUp/PgDn to set the
power out to 5.0W ±0.3W. Re-check supply voltage for +13.3V. Adjust voltage and power if necessary (see Figure 6-2).
4. Adjust R827 for a flat square-wave on the
oscilloscope. (The voltage at the wiper of R827
should be between 1-3V DC. If the voltage is less
than 1V DC, replace R825 with a larger value.)
7. Repeat Step 6 at the "low" and "high" channels.
5. Inject a 100 Hz sine-wave on J201, pin 6, biased at
+2.5V DC, the modulation analyzer should still
have the 15 kHz lowpass filter selected.
8. Power output should be 4.7-5.3W (50% Duty
Cycle) and current less than 2.5A for 380-512 MHz
Transmitters.
6. Adjust the audio analyzer output level to achieve a
transmit deviation of:
9. Arrow to the "mid" channel. Adjust the frequency
displayed on the Frequency Counter to read according to the frequency shown on the monitor by
adjusting the TCXO (Y801).
1.5 kHz for 12.5 kHz BW (-X10 Radios)
3.0 kHz for 25.0 kHz BW (-X30 Radios)
10.Observe the Forward Power voltage on the monitor.
The voltage should be greater than 3.0V DC.
7. Set a 0 dB reference of FM peak deviation on the
Audio Analyzer.
11.Observe the Reverse Power voltage on the monitor.
The voltage should be less than 1.0V DC.
8. Input a 1kHz sine-wave. The level should be within
±1.5 dB of the reference at 100 Hz.
0.2V RMS for 12.5 kHz BW (-X10 Radios)
0.4V RMS for 25.0 kHz BW (-X30 Radios)
6.3.5 MODULATION ADJUSTMENT
9. Remove transmit modulation and unkey the
transmitter.
1. Arrow down to Square Wave and arrow over to toggle the 100 Hz square-wave tone on.
6.3.4 TRANSMITTER AND FREQUENCY ALIGNMENT (Johnson Loader Using Diagnostics)
NOTE: Subtract the current drawn by the test loader
or any interface units from all measurements.
2. Transmit into the modulation analyzer and observe
modulation output on the oscilloscope. The modulation analyzer should not have any high pass filtering selected and no less than a 15 kHz low pass
filter.
NOTE: Refer to DL-3240 Universal Loader Board
Service Manual for software description and programming information. The PRODUCTION TEST : TEST
SELECT menu is required for alignment.
3. Check to be sure the DAC values are at there initial
settings. Press F3 to initialize the Power Adjust,
Mod Adjust, and Front-End Adjust if they are not
initialized (see Figure 6-2).
June 1997
Part No. 001-3412-002
6-2
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
4. Arrow to the "mid" channel the DAC value should
be "125" (the voltage at the wiper of R827 should be
set to 1.5V DC). If the square wave is rolled off on
the edges, adjust R825 up in value to achieve as flat
a square wave as possible. If the square wave is
peaked on the edges, adjust R825 down in value to
achieve as flat a square wave as possible.
10.Input a 100 Hz sine wave. With the modulation
analyzer 15 kHz low pass filter selected. Adjust the
audio analyzer output level to achieve a transmit
deviation of:
5. Adjust the DAC value using CTRL Page Up/Page
Down to fine tune the DAC value for the latest
square wave (see Figure 6-2).
11.Arrow to the Low channel, input a 100 Hz sine
wave and set a 0 dB reference on the MOdulation
Analyzer. Input a 1 kHz sine wave, the level should
be within ±0.5 dB of the reference at 100 Hz.
fd= 1.5 kHz for 12.5 kHz radios
fd= 3.0 kHz for 25 kHz radios
6. If the radio/loader combination is to stay together as
one unit, press F10 to save the values to the loader
EEPROM.
12.Arrow to the "mid" channel, input a 100 Hz sine
wave and set a 0 dB reference on the MOdulation
Analyzer. Input a 1 kHz sine wave, the level should
be within ±0.5 dB of the reference at 100 Hz.
7. Repeat the previous two steps at the Low and High
channels.
13.Arrow to the High channel, input a 100 Hz sine
wave and set a 0 dB reference on the MOdulation
Analyzer. Input a 1 kHz sine wave, the level should
be within .05 dB of the reference at 100 Hz.
8. Arrow down to Square Wave and arrow over to shut
the square wave off.
9. Arrow up to Tx Audio Mode and arrow over to
Wide AC.
File
Edit
Utilities
Program
Code
14.Unkey the transmitter by pressing F6.
Prod Test
Frequency Select
Radio
Freq Pair
Range
Rx Frequency
Tx Frequency
Rx Audio Mode
Tx Audio Mode
600 Ohm Input
Square Wave
Carrier Squelch
PgUp/Dn:
CTRL PgUp/Dn:
ALT PgUp/Dn:
Power Adj
Mod Adj
Front End Adj
08:43:30
(ESC to Exit)
3412
MID
450.000000 MHz
450.000000 MHz
Audio
Audio
OFF
OFF
ON
F2: Auto Front-End Adjust
F5: PTT On
F9: Toggle Sleep Mode
-Help
RSSI Voltage
Forware Power
Reverse Power
Voltage
Current
Temperature
VSWR
Power Adj
MOd Adj
Front-End Adj
Diag-En Adj
0.70 V
2.40 V
0.60 V
13.3 V
0.09 A
89 F
1.4:1
89
102
122
255
Synth Lock
F3: Init Tune Settings
F4: Start Heat Run
F6: PTT Off
F7: Direct DAC Adj
F10: Save Power/Mod/Front-End Adj for Pair
Frequency Pair (Left/Right Arrow to Select)
Figure 6-2 PRODUCTION TEST:TEST SELECT
6-3
June 1997
Part No. 001-3412-002
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
NOTE: Maintain these deviation levels throughout
the test when measuring AC levels, SINAD and %
distortion.
6.3.6 RECEIVER ALIGNMENT
CAUTION
Do not key the transmitter with the generator connected because severe generator damage may result.
3. Adjust L253 for +2.5V DC (±0.05V DC) at the
receive audio output, J201, pin 13.
1. Connect the test setup shown in Figure 6-3. Adjust
the power supply for +13.3V DC.
4. Set the RF signal generator level to -105 dBm,
"unmodulated".
2. Measure the receive current drain. (Typically current should be approximately 88 mA or 105 mA
with Loader Board.)
5. Set the generator frequency 3 kHz (-X10) or 5 kHz
(-X30) below channel center.
6. Adjust C221, then L211 for peak RSSI voltage.
3. Preset tuning slugs of L211/L222 to the full clockwise position (slug in all the way).
NOTE: Use 2V scale on DVM.
4. Preset C221 to center position (slot in-line with axis
of part).
7. Set the RF signal generator frequency back to channel center at -47 dBm with standard deviation level.
5. Readjust L222 counterclockwise 2 turns.
8. Adjust L222 for minimum distortion.
9. Set the RF signal generator to -105 dBm, "unmodulated".
10.Adjust L211 for peak RSSI voltage.
COMMUNICATIONS
SERVICE MONITOR
MODULATION
ANALYZER
NOTE: Use 2V scale on DVM.
11.Set RF generator back to standard deviation levels
and re-adjust L253 for peak audio output. Verify
audio output level of 150 mV RMS, ±50 mV RMS
at a DC bias of 2.5V DC, ±0.3V DC.
DC
VOLTMETER
+13.3V DC
POWER SUPPLY
12.Measure the percent distortion. (Typically <3%.)
0-3A
DC AMMETER
13.Adjust the RF input level until 12 dB SINAD is
measured. (Typically <0.35 µV/-116 dBm).
TX
RX
14. Adjust the generator RF level to -120 dBm and
measure DC (RSSI) voltage on J201, pin 12.
(Typically ≤ 0.90V DC.)
Figure 6-3 RECEIVER TEST SETUP
15.Adjust the generator RF level to -60 dBm and measure DC (RSSI) voltage on J201, pin 12.
(Typically ≥ 2.40V DC.)
6.3.7 IF AND AUDIO ADJUSTMENTS
1. Load the synthesizer with the channel frequency.
2. Set the RF signal generator for this frequency with
a 1 kHz tone (modulated output shown below) at a
level of -47 dBm (1000 µV) and inject into J501.
1.5 kHz deviation 12.5 kHz BW (-X10 Radio)
3.0 kHz deviation 25.0 kHz BW (-X30 Radio)
June 1997
Part No. 001-3412-002
6-4
TP831
R825
J501
R827
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
A801
VCO
L222
L221
L253
14 13
R571
R572
L211
R535
C221
J201 6
R823
Y801
Figure 6-4 ALIGNMENT POINTS DIAGRAM
6-5
June 1997
Part No. 001-3412-002
ALIGNMENT PROCEDURE AND PERFORMANCE TESTS
This page intentionally left blank.
June 1997
Part No. 001-3412-002
6-6
SECTION 7 PARTS LIST
SYMBOL
NUMBER
PART
NUMBER
DESCRIPTION
SYMBOL
NUMBER
3412 TRANSCEIVER
PART NO. 242-3412-XX0
A 002
A 801
A 801
A 801
A 801
A 801
A 801
A 801
Loader board assembly
VCO 403-419 MHz
VCO 419-435 MHz
VCO 435-451 MHz
VCO 450-470 MHz
VCO 464-480 MHz
VCO 480-496 MHz
VCO 496-512 MHz
023-3240-330
023-3474-240
023-3474-340
023-3474-440
023-3412-540
023-3474-640
023-3474-740
023-3474-840
C 101
C 102
C 103
C 104
C 105
C 106
C 111
C 112
C 113
C 114
C 115
C 116
C 121
C 122
C 123
C 124
C 125
C 131
C 132
C 133
C 134
C 135
C 136
C 137
C 141
C 142
C 143
C 144
C 145
C 146
C 151
68 pF ±5% NPO 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
.1 µF ±5% X7R 1206
.01 µF ±10% X7R 0603
.0082 µF ±10% X7R 0805
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
510-3674-680
510-2625-109
510-3674-680
510-3675-103
510-2625-109
510-3674-680
510-3675-103
510-3674-680
510-3674-680
510-3609-104
510-3675-103
510-3605-822
510-3674-680
510-3674-680
510-3675-103
510-3674-680
510-2625-109
510-3674-680
510-2625-109
510-3674-680
510-3675-103
510-2625-109
510-3674-680
510-3675-103
510-2625-109
510-3674-680
510-3675-103
510-3675-103
510-2625-109
510-3674-680
510-3674-680
C 152
C 153
C 154
C 155
C 156
C 157
C 158
C 159
C 160
C 161
C 162
C 163
C 171
C 172
C 201
C 202
C 203
C 204
C 205
C 206
C 207
C 208
C 209
C 210
C 211
C 212
C 213
C 214
C 215
C 221
C 222
C 223
C 231
C 232
C 233
C 234
C 235
C 261
7-1
PART
NUMBER
DESCRIPTION
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
3.9 pF ±0.1% NPO 0603
22 pF ±5% NPO 0603
5.6 pF ±0.1% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
3.9 pF ±0.1% NPO 0603
68 pF ±5% NPO 0603
1.5-5 pF ceramic SMD
3.3 pF ±0.1% NPO 0603
.01 µF ±10% X7R 0603
(12.5 kHz Bandwidth)
39 pF ±5% NPO 0805
(25 kHz Bandwidth)
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
8.2 pF ±0.1% NPO 0603
(12.5 kHz BW)
10 pF ±0.1% NPO 0805
(25 kHz BW)
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-2625-109
510-3674-680
510-3674-680
510-3675-103
510-3674-680
510-3675-103
510-3674-680
510-3674-680
510-3673-399
510-3674-220
510-3673-569
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3673-399
510-3674-680
512-1602-001
510-3673-339
510-3675-103
510-3601-390
510-3674-680
510-3675-103
510-3673-829
510-3601-100
510-3675-103
510-3675-103
510-3674-680
June 1997
Part No. 001-3412-002
PARTS LIST
SYMBOL
NUMBER
C 262
C 264
C 265
C 266
C 267
C 268
C 271
C 272
C 273
C 275
C 276
C 277
C 279
C 301
C 302
C 303
C 304
C 305
C 306
C 307
C 401
C 402
C 403
C 404
C 405
C 406
C 407
C 408
C 409
C 501
C 502
C 503
C 504
C 505
C 506
C 507
C 508
C 511
C 512
C 513
C 514
C 515
C 516
C 517
DESCRIPTION
.1 µF ±5% X7R 1206
47 µF 10V SMD tantalum
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
10 pF ±0.1% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
8.2 pF ±0.1% NPO 0603
(403-470 MHz)
5.6 pF ±0.1% NPO 0603
(464-512 MHz)
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
5.6 pF ±0.1% NPO 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
82 pF ±5% NPO 0603
6.8 pF ±0.1% NPO 0603
82 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.1 µF ±5% X7R 1206
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
22 pF ±5% NPO 0603
10 pF ±0.1% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
3.9 pF ±0.1% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
470 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
June 1997
Part No. 001-3412-002
PART
NUMBER
SYMBOL
NUMBER
510-3609-104
510-2624-470
510-3675-103
510-3674-680
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3673-100
510-3675-103
510-3674-680
510-3673-829
C 518
C 519
C 521
C 522
C 523
C 524
C 531
C 532
C 533
C 534
C 535
C 536
C 541
C 542
C 543
C 544
C 551
C 552
510-3673-569
510-2625-109
510-3674-680
510-3674-680
510-3673-569
510-3674-680
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3674-820
510-3673-689
510-3674-820
510-3675-103
510-3609-104
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-220
510-3673-100
510-3675-103
510-3674-680
510-3674-680
510-3673-399
510-3675-103
510-3674-680
510-3674-471
510-3674-680
510-3674-680
C 553
C 554
C 555
7-2
DESCRIPTION
1.8 pF ±0.1% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
1 µF 16V SMD tantalum
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
22 pF ±5% NPO 0603
10 pF ±0.1% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
7.5 pF ±5% NPO 0805
(380-403 MHz)
6.8 pF ±5% NPO 0805
(403-435 MHz)
8.2 pF ±5% NPO 0805
(435-470 MHz)
5.6 pF ±5% NPO 0805
(464-512 MHz)
15 pF ±5% NPO 0805
(380-403 MHz)
12 pF ±5% NPO 0805
(403-435 MHz)
10 pF ±5% NPO 0805
(435-470 MHz)
7.5 pF ±5% NPO 0805
(464-512 MHz)
8.2 pF ±5% NPO 0805
(380-435 MHz)
7.5 pF ±5% NPO 0805
(435-470 MHz)
6.8 pF ±5% NPO 0805
(464-512 MHz)
15 pF ±5% NPO 0805
(380-403 MHz)
13 pF ±5% NPO 0805
(403-435 MHz)
11 pF ±5% NPO 0805
(435-470 MHz)
9.1 pF ±5% NPO 0805
(464-512 MHz)
PART
NUMBER
510-3673-189
510-3674-680
510-3674-680
510-2625-109
510-3675-103
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3674-680
510-3675-103
510-3674-220
510-3673-100
510-3675-103
510-3674-680
510-3674-680
510-3601-759
510-3601-689
510-3601-829
510-3601-569
510-3601-150
510-3601-120
510-3601-100
510-3601-759
510-3601-829
510-3601-759
510-3601-689
510-3601-150
510-3601-130
510-3601-110
510-3601-919
PARTS LIST
SYMBOL
NUMBER
C 556
C 561
C 562
C 563
C 564
C 581
C 591
C 592
C 593
C 594
C 701
C 702
C 703
C 704
C 706
C 707
C 708
C 709
C 801
C 802
C 803
C 804
C 805
C 806
C 811
C 812
C 813
C 815
C 816
C 821
C 822
C 825
C 831
C 832
C 833
C 836
C 841
C 842
DESCRIPTION
16 pF ±5% NPO 0805
(380-403 MHz)
15 pF ±5% NPO 0805
(403-435 MHz)
13 pF ±5% NPO 0805
(435-470 MHz)
10 pF ±5% NPO 0805
(464-512 MHz)
1 pF ±5% NPO 0805
68 pF ±5% NPO 0603
1.5 pF ±5% NPO 0805
33 pF ±5% NPO 0603
68 pF ±5% NPO 0603
27 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
27 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
1 µF 16V SMD tantalum
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
4.7 pF ±0.1% NPO 0603
(380-403 MHz)
3.3 pF ±0.1% NPO 0603
(403-435 MHz)
3.9 pF ±0.1% NPO 0603
1 µF 16V SMD tantalum
68 pF ±5% NPO 0603
.001 µF ±10% X7R 0603
100 pF ±5% NPO 0805
.1 µF ±5% X7R 1206
.0047 µF ±10% X7R 0805
.0047 µF ±10% X7R 0805
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
PART
NUMBER
SYMBOL
NUMBER
510-3601-160
510-3601-150
510-3601-130
510-3601-100
510-3601-109
510-3674-680
510-3601-159
510-3674-330
510-3674-680
510-3674-270
510-3675-103
510-3674-270
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3675-103
510-3674-680
510-2625-109
510-3675-103
510-3675-103
510-3674-680
510-3675-103
510-3675-103
510-3674-680
510-3675-103
510-3675-103
510-3675-103
510-3674-680
510-3673-479
PART
NUMBER
DESCRIPTION
C 843
C 844
C 845
C 846
C 847
C 848
C 849
C 850
C 901
C 902
C 903
C 911
C 912
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
4.7 µF 10V SMD tantalum
.01 µF ±10% X7R 0603
68 pF ±5% NPO 0603
.01 µF ±10% X7R 0603
.01 µF ±10% X7R 0603
510-3675-103
510-3674-680
510-3675-103
510-3674-680
510-3675-103
510-3674-680
510-3675-103
510-3674-680
510-2624-479
510-3675-103
510-3674-680
510-3675-103
510-3675-103
CR231
CR561
CR562
CR591
CR592
CR701
CR901
Switching diode SOT-23
Pin switch diode SOT-23
Pin switch diode SOT-23
Hot carrier diode SOT-23
Hot carrier diode SOT-23
Dual switch diode SOT-23
Varactor diode SOD-323
523-1504-002
523-1504-001
523-1504-001
523-1504-016
523-1504-016
523-1504-023
523-5005-022
EP111
EP200
EP501
EP531
EP532
EP533
EP534
Ferrite bead SMD
Mini cer xtal pin insulator
Ferrite bead SMD
Ferrite bead SMD
Ferrite bead SMD
Ferrite bead SMD 123
Ferrite bead SMD
517-2503-001
010-0345-280
517-2503-001
517-2503-001
517-2503-001
517-2503-010
517-2503-001
HW102 Grafoil M577xx
HW104 4-40 machine panhead ZPS
018-1007-102
575-1604-010
J 201
J 501
14-pin single row receptacle
Right angle PC bd mt
515-7110-214
142-0701-501
L 201
L 202
L 211
L 221
L 222
L 253
L 301
12 nH inductor LL2012 F12N
10 nH inductor 0805 SMD
1 µH ±6% 5mm variable
.82 µH SMD inductor
1 µH ±6% 5mm variable
680 µH quad coil
15 nH inductor LL2012 F15N
(403-470 MHz)
12 nH inductor LL2012 F12N
(464-512 MHz)
542-9003-127
542-9003-107
542-1012-015
542-9001-828
542-1012-015
542-5102-001
542-9003-157
510-3673-339
510-3673-399
510-2625-109
510-3674-680
510-3675-102
510-3601-101
510-3609-104
510-3605-472
510-3605-472
510-3675-103
510-3674-680
7-3
542-9003-127
June 1997
Part No. 001-3412-002
PARTS LIST
SYMBOL
NUMBER
L 302
DESCRIPTION
PART
NUMBER
L 401
L 402
L 403
L 501
L 511
L 512
L 513
L 551
L 552
L 553
L 554
L 555
L 561
L 811
18 nH inductor LL2012 F15N
(403-470 MHz)
15 nH inductor LL2012 F15N
(464-512 MHz)
.1 µH SMD inductor
.1 µH SMD inductor
1 µH SMD inductor
1 µH SMD inductor
18 nH inductor LL2012 F18N
1 µH SMD inductor
18 nH inductor LL2012 F15N
18.5 nH 5-turn SMD air core
35.5 nH 9-turn SMD air core
35.5 nH 9-turn SMD air core
18.5 nH 5-turn SMD air core
1 µH SMD inductor
8 nH SMD air core
39 µH ±10% SMD NHY0805
542-9001-108
542-9001-108
542-9001-109
542-9001-109
542-9003-187
542-9001-109
542-9003-187
542-0030-005
542-0030-009
542-0030-009
542-0030-005
542-9001-109
542-0030-003
542-9003-397
MP101
MP102
MP107
MP108
MP109
MP110
MP801
MP806
Heat sink
VHF/UHF module shield
Low-pass filter top shield
Synthesizer bottom shield
Driver bottom shield
Low-pass filter bottom shield
VCO can
Crystal filter shield
014-0778-047
017-2225-756
017-2225-771
017-2225-772
017-2225-773
017-2225-774
017-2225-751
017-2225-699
542-9003-187
542-9003-157
PC001 PC board
035-3412-030
Q 101
Q 102
Q 121
Q 122
Q 123
Q 124
Q 131
Q 171
Q 172
Q 173
Q 201
Q 202
Q 211
Q 231
Q 301
Q 401
Q 501
576-0013-046
576-0013-032
576-0013-046
576-0013-046
576-0013-032
576-0006-027
576-0013-046
576-0013-046
576-0013-032
576-0013-046
576-0013-700
576-0003-636
576-0006-019
576-0003-634
576-0003-636
576-0003-634
576-0003-640
NPN digital transistor
PNP digital transistor
NPN digital transistor
NPN digital transistor
PNP digital transistor
NPN high current SOT-23
NPN digital transistor
NPN digital transistor
PNP digital transistor
NPN digital transistor
PNP gen purp SC-70
NPN low noise SOT-23
Si N-chnl JFET SOT
VHF/UHF amp SOT-23
NPN low noise SOT-23
VHF/UHF amp SOT-23
Bi-polar MMIC SOT-143
June 1997
Part No. 001-3412-002
SYMBOL
NUMBER
PART
NUMBER
Q 511
Q 531
Q 701
Q 801
Q 841
Q 842
Q 901
Q 902
Q 911
NPN low noise SOT-23
NPN high current SOT-23
VHF/UHF amp SOT-23
NPN gen purp SC-70
NPN digital transistor
PNP digital transistor
NPN gen purp SC70
NPN gen purp SC70
Si NPN gen purp SOT-23
576-0003-636
576-0006-027
576-0003-634
576-0013-701
576-0013-046
576-0013-032
576-0013-701
576-0013-701
576-0003-658
R 102
R 111
R 112
R 113
R 114
R 115
R 116
R 117
R 121
R 122
R 123
R 124
R 125
R 126
R 127
R 131
R 132
R 133
R 134
R 141
R 142
R 171
R 201
R 202
R 203
R 204
R 205
R 211
R 212
1k ohm ±5% .063W 0603
22k ohm ±5% .063W 0603
43k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
150k ohm ±5% .063W 0603
150k ohm ±5% .063W 0603
120 ohm ±5% 1206 SMD
120 ohm ±5% 1206 SMD
10k ohm ±5% .063W 0603
470 ohm ±5% .063W 0603
3.6k ohm ±5% .063W 0603
5.6k ohm ±5% .063W 0603
100k ohm ±5% .063W 0603
100k ohm ±5% .063W 0603
51 ohm ±5% 1206 SMD
51k ohm ±5% .063W 0603
15k ohm ±5% .063W 0603
100k ohm ±5% .063W 0603
15k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
100 ohm ±5% .063W 0603
3k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
8.2k ohm ±5% .063W 0603
180 ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
2.7k ohm ±5% .063W 0603
(12.5 kHz Bandwidth)
1.8k ohm ±5% .063W 0603
(25 kHz Bandwidth)
330 ohm ±5% .063W 0603
330 ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
30k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
569-0155-102
569-0155-223
569-0155-433
569-0155-103
569-0155-103
569-0155-103
569-0155-154
569-0155-154
569-0115-121
569-0115-121
569-0155-103
569-0155-471
569-0155-362
569-0155-562
569-0155-104
569-0155-104
569-0115-510
569-0155-513
569-0155-153
569-0155-104
569-0155-153
569-0155-103
569-0155-101
569-0155-302
569-0155-103
569-0155-822
569-0155-181
569-0155-100
569-0155-272
R 213
R 231
R 232
R 233
R 234
7-4
DESCRIPTION
569-0155-182
569-0155-331
569-0155-331
569-0155-102
569-0155-303
569-0155-103
PARTS LIST
SYMBOL
NUMBER
R 235
R 255
R 261
R 262
R 263
R 264
R 265
R 266
R 271
R 272
R 275
R 301
R 302
R 303
R 304
R 305
R 306
R 401
R 402
R 403
R 404
R 501
R 502
R 503
R 504
R 505
R 511
R 512
R 513
R 514
R 515
R 533
R 534
R 535
R 536
R 561
R 565
R 573
R 574
R 581
R 583
DESCRIPTION
680 ohm ±5% .063W 0603
39k ohm ±5% .063W 0603
100 ohm ±5% .063W 0603
12k ohm ±5% .063W 0603
(12.5 kHz Bandwidth)
27k ohm ±5% .063W 0603
(25 kHz Bandwidth)
68k ohm ±5% .063W 0603
43k ohm ±5% .063W 0603
(12.5 kHz Bandwidth)
33k ohm ±5% .063W 0603
(25 kHz Bandwidth)
10k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
3.3k ohm ±5% .063W 0603
2.4k ohm ±5% .063W 0603
330 ohm ±5% .063W 0603
330 ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
3.6k ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
2.2k ohm ±5% .063W 0603
270 ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
39k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
1.2k ohm ±5% .063W 0603
150 ohm ±5% .063W 0603
39 ohm ±5% .063W 0603
150 ohm ±5% .063W 0603
470 ohm ±5% .063W 0603
470 ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
1.8k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
560 ohm ±5% .063W 0603
100 ohm ±5% .063W 0603
470 ohm ±5% .063W 0603
100k ohm ±5% .063W 0603
100k ohm SMD trimmer
20k ohm ±5% .063W 0603
100 ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
PART
NUMBER
SYMBOL
NUMBER
569-0155-681
569-0155-393
569-0155-101
569-0155-123
R 584
R 586
R 591
R 592
R 593
R 594
R 701
R 702
R 703
R 704
R 705
R 706
R 801
R 802
R 803
R 804
R 811
R 812
R 813
R 814
R 815
R 816
R 817
R 821
R 822
R 823
R 825
R 826
R 827
R 829
R 831
R 832
R 833
R 841
R 842
R 843
R 847
R 892
R 893
R 894
R 901
R 902
R 903
R 911
R 912
R 914
R 915
R 916
R 917
569-0155-273
569-0155-683
569-0155-433
569-0155-333
569-0155-103
569-0155-100
569-0155-332
569-0155-242
569-0155-331
569-0155-331
569-0155-103
569-0155-362
569-0155-102
569-0155-222
569-0155-271
569-0155-100
569-0155-393
569-0155-103
569-0155-122
569-0155-151
569-0155-390
569-0155-151
569-0155-471
569-0155-471
569-0155-472
569-0155-182
569-0155-100
569-0155-561
569-0155-101
569-0155-471
569-0155-104
562-0130-104
569-0155-203
569-0155-101
569-0155-473
569-0155-103
569-0155-103
569-0155-100
569-0155-103
7-5
PART
NUMBER
DESCRIPTION
10 ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
51 ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
51 ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
100 ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
22k ohm ±5% .063W 0603
15k ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
1M ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
20 ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
100k ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
100k ohm SMD trimmer
100k ohm SMD trimmer
10k ohm ±5% .063W 0603
220k ohm SMD trimmer
27k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
12k ohm ±5% .063W 0603
18k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
100 ohm ±5% .063W 0603
1.5k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
18 ohm ±5% .063W 0603
18 ohm ±5% .063W 0603
18 ohm ±5% .063W 0603
4.7k ohm ±5% .063W 0603
2.2k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
569-0155-100
569-0155-103
569-0155-510
569-0155-102
569-0155-510
569-0155-102
569-0155-101
569-0155-102
569-0155-223
569-0155-153
569-0155-102
569-0155-105
569-0155-103
569-0155-200
569-0155-472
569-0155-103
569-0155-472
569-0155-472
569-0155-472
569-0155-472
569-0155-472
569-0155-472
569-0155-472
569-0155-104
569-0155-472
562-0130-104
562-0130-104
569-0155-103
562-0130-224
569-0155-273
569-0155-100
569-0155-123
569-0155-183
569-0155-103
569-0155-101
569-0155-152
569-0155-103
569-0155-180
569-0155-180
569-0155-180
569-0155-472
569-0155-222
569-0155-103
569-0155-103
569-0155-103
569-0155-103
569-0155-473
569-0155-473
569-0155-102
June 1997
Part No. 001-3412-002
PARTS LIST
SYMBOL
NUMBER
U 111
U 131
U 141
U 211
U 241
U 261
U 521
U 581
U 811
U 911
U 912
U 913
DESCRIPTION
Quad op amp SO-14 331
Voltage regulator SO-6
Voltage regulator SO-6
Double balanced mixer
LV FM IF SA676DK
Single op amp SOT-23-5
5W RF power module
Op amp SO-8 MC33172D
Fractional-N synthesizer
Quad 8-bit TLC5620ID
8-stage shift register SOIC
3 - 2-chnl analog mux/demux
PART
NUMBER
544-2020-017
544-2603-093
544-2603-093
544-0007-014
544-2002-037
544-2016-001
544-4001-064
544-2019-017
544-3954-027
544-2031-014
544-3016-094
544-3016-053
Y 801 17.5 MHz TCXO ±1.5 PPM
518-7009-521
Z 201 411 MHz helical filter SMD
(403-419 MHz)
427 MHz helical filter SMD
(419-435 MHz)
443 MHz helical filter SMD
(435-451 MHz)
459 MHz helical filter SMD
(450-470 MHz)
472 MHz helical filter SMD
(464-480 MHz)
488 MHz helical filter SMD
(480-496 MHz)
504 MHz helical filter SMD
(496-512 MHz)
Z 202 411 MHz helical filter SMD
(403-419 MHz)
427 MHz helical filter SMD
(419-435 MHz)
443 MHz helical filter SMD
(435-451 MHz)
459 MHz helical filter SMD
(450-470 MHz)
472 MHz helical filter SMD
(464-480 MHz)
488 MHz helical filter SMD
(480-496 MHz)
504 MHz helical filter SMD
(496-512 MHz)
Z 221 52.95 MHz 4-pole 8 kHz BW
(12.5 kHz bandwidth)
52.95 MHz 4-pole 15 kHz BW
(25 kHz bandwidth)
532-1005-040
June 1997
Part No. 001-3412-002
SYMBOL
NUMBER
Z 251
Z 252
PART
NUMBER
DESCRIPTION
450 kHz, 9 kHz BW
(12.5 kHz bandwidth)
450 kHz, 20 kHz BW
(25 kHz bandwidth)
450 kHz, 9 kHz BW
(12.5 kHz bandwidth)
450 kHz, 20 kHz BW
(25 kHz bandwidth)
532-2004-015
532-2004-013
532-2004-015
532-2004-013
VCO (450-470 MHz)
PART NO. 023-3412-540
532-1005-041
532-1005-042
532-1005-044
532-1005-045
532-1005-046
532-1005-047
532-1005-040
532-1005-041
532-1005-042
532-1005-044
532-1005-045
C 850
C 851
C 852
C 853
C 854
C 855
C 856
C 858
C 859
C 861
C 862
C 863
C 864
C 865
C 866
C 867
C 868
C 869
C 870
C 871
C 873
C 874
C 876
C 877
C 878
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
8.2 pF ±0.1% NPO 0603
12 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
2.7 pF ±0.1% NPO 0603
68 pF ±5% NPO 0603
5.6 pF ±0.1% NPO 0603
6.8 pF ±0.1% NPO 0603
6.8 pF ±0.1% NPO 0603
68 pF ±5% NPO 0603
10 pF ±0.1% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
68 pF ±5% NPO 0603
1.8 pF ±0.1% NPO 0603
1 pF ±0.1% NPO 0603
1 pF ±0.1% NPO 0603
100 pF ±5% NPO 0603
100 pF ±5% NPO 0603
3.3 pF ±0.1% NPO 0603
8.2 pF ±0.1% NPO 0603
1 pF ±0.1% NPO 0603
10 pF ±0.1% NPO 0603
510-3674-680
510-3674-680
510-3674-829
510-3674-120
510-3674-680
510-3674-680
510-3673-279
510-3674-680
510-3673-569
510-3673-689
510-3673-689
510-3674-680
510-3673-100
510-3674-680
510-3674-680
510-3674-680
510-3673-189
510-3673-109
510-3673-109
510-3674-101
510-3674-101
510-3673-339
510-3673-829
510-3673-109
510-3673-100
CR850
CR851
CR852
CR853
CR854
CR855
CR856
Pin switch diode SOT-23
Varactor SOD-323 BB535
Varactor diode SOD-123
Varactor diode SOD-123
Varactor SOD-323 BB535
Varactor SOD-323 BB535
Varactor SOD-323 BB535
523-1504-001
523-5005-022
523-5005-020
523-5005-020
523-5005-022
523-5005-022
523-5005-022
532-1005-046
532-1005-047
532-0009-011
532-0009-009
7-6
PARTS LIST
SYMBOL
NUMBER
DESCRIPTION
L 851
L 852
L 853
L 854
L 855
L 856
150 nH ±10% SMD 0805
150 nH ±10% SMD 0805
22 nH inductor LL2012 F18N
150 nH ±10% SMD 0805
56 nH inductor LL2012 F56N
22 nH ±10% SMD 0805
542-9003-158
542-9003-158
542-9003-227
542-9003-158
542-9003-567
542-9003-227
Q 850
Q 851
Q 852
Q 853
NPN transistor NE85619
NPN transistor NE85619
NPN transistor NE85619
NPN transistor NE85619
576-0003-651
576-0003-651
576-0003-651
576-0003-651
R 851
R 852
R 853
R 854
R 856
R 857
R 858
R 862
R 863
R 864
R 865
R 866
R 867
R 868
R 869
R 870
R 871
R 872
R 874
R 875
10k ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
6.8k ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
390 ohm ±5% .063W 0603
12k ohm ±5% .063W 0603
330 ohm ±5% .063W 0603
270 ohm ±5% .063W 0603
18 ohm ±5% .063W 0603
3.9k ohm ±5% .063W 0603
1.2k ohm ±5% .063W 0603
330 ohm ±5% .063W 0603
270 ohm ±5% .063W 0603
569-0155-103
569-0155-473
569-0155-473
569-0155-100
569-0155-100
569-0155-682
569-0155-102
569-0155-103
569-0155-100
569-0155-103
569-0155-103
569-0155-391
569-0155-123
569-0155-331
569-0155-271
569-0155-180
569-0155-392
569-0155-122
569-0155-331
569-0155-271
Z 850 SMD resonator
SYMBOL
NUMBER
PART
NUMBER
PART
NUMBER
DESCRIPTION
VCO
PART NO. 023-3474-X40
C 850 68 pF ±5% NPO 0603
C 851 68 pF ±5% NPO 0603
(403-496 MHz)
47 pF ±5% NPO 0603
(496-512 MHz)
C 852 9.1 pF ±5% NPO 0603
(403-419 MHz)
8.2 pF ±0.1% NPO 0603
(419-451 MHz)
7.5 pF ±0.1% NPO 0603
(464-496 MHz)
6.8 pF ±5% NPO 0603
(496-512 MHz)
C 853 12 pF ±5% NPO 0603
(403-419 MHz)
10 pF ±5% NPO 0603
(419-451 MHz)
9.1 pF ±5% NPO 0603
(464-480 MHz)
8.2 pF ±5% NPO 0603
(480-512 MHz)
C 854 100 pF ±5% NPO 0603
(403-451/464-480 MHz)
68 pF ±5% NPO 0603
(480-496 MHz)
47 pF ±5% NPO 0603
(480-496 MHz)
C 855 68 pF ±5% NPO 0603
C 856 2.7 pF ±0.1% NPO 0603
C 858 68 pF ±5% NPO 0603
C 859 8.2 pF ±0.1% NPO 0603
(403-419 MHz)
7.5 pF ±0.1% NPO 0603
(419-451 MHz)
6.8 pF ±0.1% NPO 0603
(464-512 MHz)
C 860 1 pF ±0.1% NPO 0603
(403-419/435-451 MHz Only)
C 861 8.2 pF ±0.1% NPO 0603
(403-419 MHz)
6.8 pF ±0.1% NPO 0603
(419-451 MHz)
5.6 pF ±0.1% NPO 0603
(464-480 MHz)
6.8 pF ±0.1% NPO 0603
(480-512 MHz)
542-9004-006
7-7
510-3674-680
510-3674-680
510-3674-470
510-3673-919
510-3674-829
510-3674-759
510-3674-689
510-3674-120
510-3674-100
510-3674-919
510-3674-829
510-3674-101
510-3674-680
510-3674-470
510-3674-680
510-3673-279
510-3674-680
510-3673-829
510-3673-759
510-3673-689
510-3673-109
510-3673-829
510-3673-689
510-3673-569
510-3673-689
June 1997
Part No. 001-3412-002
PARTS LIST
SYMBOL
NUMBER
DESCRIPTION
C 862 6.8 pF ±0.1% NPO 0603
C 863 100 pF ±0.1% NPO 0603
(403-419 MHz)
68 pF ±5% NPO 0603
(419-451/464-512 MHz)
C 864 10 pF ±0.1% NPO 0603
C 865 100 pF ±0.1% NPO 0603
(403-419 MHz)
68 pF ±5% NPO 0603
(419451/464-512 MHz)
C 866 100 pF ±0.1% NPO 0603
(403-419 MHz)
68 pF ±5% NPO 0603
(419-451/464-512 MHz)
C 867 100 pF ±0.1% NPO 0603
(403-419 MHz)
68 pF ±5% NPO 0603
(419-451/464-512 MHz)
C 868 2.4 pF ±0.1% NPO 0603
(403-419 MHz)
2.2 pF ±0.1% NPO 0603
(419-435 MHz)
1.8 pF ±0.1% NPO 0603
(435-451 MHz)
1.2 pF ±0.1% NPO 0603
(464-480 MHz)
1.8 pF ±0.1% NPO 0603
(480-496 MHz)
1.5 pF ±0.1% NPO 0603
(496-512 MHz)
C 869 1 pF ±0.1% NPO 0603
(464-496 MHz)
C 870 1 pF ±0.1% NPO 0603
C 871 100 pF ±5% NPO 0603
C 873 100 pF ±5% NPO 0603
C 874 3.3 pF ±0.1% NPO 0603
(403-419 MHz)
2.7 pF ±0.1% NPO 0603
(419-435 MHz)
3.3 pF ±0.1% NPO 0603
(435-451/464-496 MHz)
3.9 pF ±0.1% NPO 0603
(496-512 MHz)
C 876 10 pF ±0.1% NPO 0603
(403-419 MHz)
9.1 pF ±0.1% NPO 0603
(419-435 MHz)
8.2 pF ±0.1% NPO 0603
(435-451/464-512 MHz)
June 1997
Part No. 001-3412-002
PART
NUMBER
SYMBOL
NUMBER
510-3673-689
510-3673-101
510-3674-680
510-3673-100
510-3673-101
510-3674-680
510-3673-101
510-3674-680
DESCRIPTION
C 877 1.2 pF ±0.1% NPO 0603
(403-435 MHz)
1 pF ±0.1% NPO 0603
(435-451/464-512 MHz)
C 878 10 pF ±0.1% NPO 0603
510-3673-100
CR850
CR851
CR852
CR853
CR854
CR855
CR856
523-1504-001
523-5005-022
523-5005-020
523-5005-020
523-5005-022
523-5005-022
523-5005-022
Pin switch diode SOT-23
Varactor SOD-323 BB535
Varactor diode SOD-123
Varactor diode SOD-123
Varactor SOD-323 BB535
Varactor SOD-323 BB535
Varactor SOD-323 BB535
L 851 82 nH ±10% SMD 0805
(403-435 MHz)
150 nH ±10% SMD 0805
(435-451/464-512 MHz)
L 852 150 nH ±10% SMD 0805
L 853 22 nH ±10% SMD 0805
(403-451/464-480 MHz)
18 nH inductor LL2012 F18N
(480-512 MHz)
L 854 150 nH ±10% SMD 0805
L 855 56 nH inductor LL2012 F56N
L 856 27 nH ±10% SMD 0805
(403-435 MHz)
22 nH ±10% SMD 0805
(435-451/464-480 MHz)
18 nH ±10% SMD 0805
(480-512 MHz)
L 861 15 nH ±10% SMD 0805
(480-496 MHz)
12 nH ±10% SMD 0805
(496-512 MHz)
510-3673-101
510-3674-680
510-3673-249
510-3673-229
510-3673-189
510-3673-129
510-3673-189
510-3673-159
510-3673-109
510-3673-109
510-3674-101
510-3674-101
510-3673-339
510-3673-279
510-3673-339
510-3673-399
510-3673-100
510-3673-919
510-3673-829
7-8
PART
NUMBER
510-3673-129
510-3673-109
542-9003-827
542-9003-158
542-9003-158
542-9003-227
542-9003-187
542-9003-158
542-9003-567
542-9003-277
542-9003-227
542-9003-187
542-9003-157
542-9003-127
Q 850
Q 851
Q 852
Q 853
NPN transistor NE85619
NPN transistor NE85619
NPN transistor NE85619
NPN transistor NE85619
576-0003-651
576-0003-651
576-0003-651
576-0003-651
R 851
R 852
R 853
R 854
R 856
R 857
R 858
10k ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
47k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
6.8k ohm ±5% .063W 0603
1k ohm ±5% .063W 0603
569-0155-103
569-0155-473
569-0155-473
569-0155-100
569-0155-100
569-0155-682
569-0155-102
PARTS LIST
SYMBOL
NUMBER
R 862
R 863
R 864
R 865
R 866
R 867
R 868
R 869
R 870
R 871
R 872
R 874
R 875
DESCRIPTION
10k ohm ±5% .063W 0603
10 ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
10k ohm ±5% .063W 0603
470 ohm ±5% .063W 0603
12k ohm ±5% .063W 0603
390 ohm ±5% .063W 0603
270 ohm ±5% .063W 0603
18 ohm ±5% .063W 0603
3.9k ohm ±5% .063W 0603
1.8k ohm ±5% .063W 0603
680 ohm ±5% .063W 0603
270 ohm ±5% .063W 0603
Z 850 SMD resonator
(403-4135MHz)
SMD resonator
(435-451 MHz)
SMD resonator
(464-480 MHz)
SMD resonator
(480-496 MHz)
SMD resonator
(496-512 MHz)
PART
NUMBER
569-0155-103
569-0155-100
569-0155-103
569-0155-103
569-0155-471
569-0155-123
569-0155-391
569-0155-271
569-0155-180
569-0155-392
569-0155-182
569-0155-681
569-0155-271
542-9004-002
542-9004-004
542-9004-006
542-9004-007
542-9004-008
7-9
June 1997
Part No. 001-3412-002
PARTS LIST
This page intentionally left blank.
June 1997
Part No. 001-3412-002
7-10
SECTION 8 SCHEMATICS AND COMPONENT LAYOUTS
TRANSISTOR AND DIODE BASING
REFERENCE TABLE
TRANSISTORS
Part Number
Basing Diagram
Identification
TOP
VIEW
TOP
VIEW
576-0003-634
576-0003-636
576-0003-640
576-0003-651
576-0003-658
576-0006-019
576-0006-027
576-0013-032
576-0013-046
576-0013-700
576-0013-701
24
1A
6T
P1F
6D
8C
BR
ZR
TOP
VIEW
TOP
VIEW
NC
GND
OUT
TOP
VIEW
DIODES
523-1504-001
523-1504-002
523-1504-016
523-1504-020
523-5005-022
523-1504-023
3B
R25
IN
4D
5A
5F
GND
5B
A7
IC BASING
REFERENCE TABLE
Part Number
Basing Diagram
Identification
14
544-0007-014
544-2002-037
544-2016-001
544-2019-017
544-2020-017
544-2031-014
544-2603-093
544-3016-053
544-3016-094
544-3954-027
U211
U241
U261
U581
U111
U911
U131/U141
U913
U912
U811
20
11
16
10
8-1
June 1997
Part No. 001-3412-002
SCHEMATICS AND COMPONENT LAYOUTS
LOADER BOARD
023-3240-330
J104
PROGRAMMING
CONNECTOR
VCO
RF BOARD
SLEEP/WAKE
RX DATA
TX DATA
NC
GROUND
PRG0
NC
PRG1
PRG2
10
GROUND
11
J201
W0854
+4.6V DC
+4.6V DC
GROUND
J201
GROUND
GROUND
+13.3V DC SWITCHED
+13.3V DC IN
TX EN
TX EN
RX EN
RX EN
RF EN
RF EN
MOD IN
MOD IN
SYNTH LOCK
SYNTH LOCK
SYNTH EN
SYNTH EN
DATA
DATA
CLOCK
10
CLOCK
DIAG EN
11
DIAG EN
RSSI
12
RSSI
DEMOD
13
DEMOD
DIAG
14
W0851
VCO OUT
VCO IN
W0852
T/R PIN SHIFT
T/R PIN SHIFT
W0856
MODULATION
MODULATION
W0859
GROUND
GROUND
W0854
CONTROL
CONTROL
W0855
-2.0V
-2.0V
DIAG
W0850
PRESCALER RF OUT
PRESCALER RF IN
W0857
J102
WIDE BAND IN
WIDE BAND OUT
FREQ SEL
RSSI
+13.3V DC
PTT
CARRIER DETECT
AUDIO IN
GROUND
10
AUDIO OUT
MODULATION ADJUST
J501
ANTENNA
USER INTERFACE
Figure 8-1 3412 INTERCONNECT
June 1997
Part No. 001-3412-002
8-2
SCHEMATICS AND COMPONENT LAYOUTS
Figure 8-2 VCO COMPONENT LAYOUT (COMPONENT SIDE VIEW)
8-3
June 1997
Part No. 001-3412-002
SCHEMATICS AND COMPONENT LAYOUTS
J501
R827
R825
TP831
A801
VCO
C141
C268
C277
R255
C111
R913
EP111
C112
C105
Q101
Q121
R115
R111
U111
R117
C116
R534
C114
C103
Q101
R102
C106
C104
R912
C911
C122
C121 C123 R116 R114
R113
C113
R112
R124
C115
C102
C101
C131
C133
L221
C581
C535
C125
Q124
U913
R126 R521
C123
C124
Q531
U912
R533
9 10 11 12 13 14
C536
R536
C266
L253
U911
R263
C261
R535
L222
U261
R916
R265
R264
R917
R914
C262
Q123
C221
Q911
Z251
Q122
L211
R912
Z252
R823
Z222
U211
C552
R915
C132
U141
C142 C143
C145
C146
C144
R141
R142
C134
R133
C136 R134
R171 C172
Z202
C171
C553
L552
R131
Z221
L551
Q131
Q171
C137
Q172
U131
C554
C135
L553
C555
R911
U521
Figure 8-3 TRANSCEIVER COMPONENT LAYOUT (COMPONENT SIDE VIEW)
June 1997
Part No. 001-3412-002
8-4
J201
C556
L554
Z201
Y801
R565
R705
C708
C704
C707
C706
R203
R202
R201
C210
C203
C204
C207 C206
L201
CR231
R204
L202
R205
Q202
C208
C305
C309
R305
L302
L561
R561
C564
C213
C584
C585
C593
C591
CR591
C595
R591
C522
C594
R594
R592
C592
R586
C505
C506
C507
C508
EP533
EP531
C533
R583
U581
C582
R584
C532
C521
EP534
C518
C523
C524
R122
R121
R513
C502
C531
C514
CR592
R581
EP501
C583
R574
R593
C212
R573
C582
EP532
L513
C513
C517
L512
C516 C511
L511
C504
R512
C515
R514
C512
R515
C519
Q511
R511
C596
C222
R212
R211
C534
C162
C215
C211
R234
Q211
C223
R505
R504
Q501
L501
R206
C214 R213
C503
R502 R501
C232
C231
C267
R261
R208
Q231
C234
R262
R503
R233
C266
C501
R232
R275
C265
C160
R231
U241
C155
C161
CR562
R132
C235
R235
C275
C264
C271 C276
C158
Q173
C233
C154
C279
L555
R847
C815
C831
R893
R894
C301
C209
R829
R816
C811
C812
Q301
CR561
C306
C307
C306
C273
C153
C163
C541
C563
C272
C159
C362
C542
R304
R301
C303
R272
C157
Q201
L301
C304
C543
R271
C152
C156
C825
R822
R303
R302
C903
C151
C822
R817
Q801
R892
C832
C902
C801
L811
R804
Q901
R801
C802
C832
C850
C849
R901
R803
R813
R815
CR901
L403
R831
C544
C201
C833
R832
U811
R814
C409
L402
C408
Q302
C407
R811
L401
C826
R812
C827
C403
C406
R401
C805
C842
C561
C205
C202
Q841
C806
C405
R841 C845
C804
R826
C401
Q401
R403
R402
R404
R821
C843
C844
C847
C846 C841
C813
C803
C402
C837
C821 +
C702
R842
C848
C816
R843
C836
R704
C404
Q842
R833
R703
R802
C701
R903
R702
R701
Q701
C562
C703
R902
CR701
C709
SCHEMATICS AND COMPONENT LAYOUTS
C551
Figure 8-4 TRANSCEIVER COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW)
8-5
June 1997
Part No. 001-3412-002
SCHEMATICS AND COMPONENT LAYOUTS
This page intentionally left blank.
June 1997
Part No. 001-3412-002
8-6
SCHEMATICS AND COMPONENT LAYOUTS
Figure 8-5
SCHEMATIC (1 OF 2)
REVISED
8-7
June 1997
Part No. 001-3412-002
SCHEMATICS AND COMPONENT LAYOUTS
Figure 8-6
SCHEMATIC (2 OF 2)
REVISED
June 1997
Part No. 001-3412-002
8-8

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