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DWG ID: 181-0101-01
Date: 2003-08-12
2 TABLE OF CONTENTS
1
REVISIONS............................................................................................................ 2
2
TABLE OF CONTENTS........................................................................................ 3
3
GENERAL INFORMATION................................................................................. 4
3.1
Sales/Inquiries......................................................................................................... 4
3.2
Technical Support ................................................................................................... 4
3.3
Miscellaneous ......................................................................................................... 4
3.4
Disclaimer Notice ................................................................................................... 4
4
MAINTENANCE INFORMATION ...................................................................... 4
4.1
Repair Cautions....................................................................................................... 4
4.1.1 Surface Mount Repair ............................................................................................. 5
4.1.2 Precautions For Handling CMOS Devices ............................................................. 5
4.2
Unit Disassembly.................................................................................................... 6
4.2.1 To remove Cover .................................................................................................... 6
4.2.2 To remove Rear Panel with Finned Heat Sink........................................................ 6
4.2.3 To remove Finned Heat Sink from Rear Panel....................................................... 6
4.2.4 To remove Front Panel only ................................................................................... 6
4.2.5 If your unit has an I/O, A3, CCA............................................................................ 7
4.2.6 To remove the Controller, A2, CCA....................................................................... 7
4.2.7 To remove the radio transceiver, A1, CCA with heat sink plate ............................ 7
4.2.8 To remove the radio XCVR from the heat sink plate ............................................. 7
4.3
Unit Assembly ........................................................................................................ 7
5
ALIGNMENT......................................................................................................... 8
5.1
Required Test Equipment ....................................................................................... 8
5.2
Alignment Procedure .............................................................................................. 9
5.2.1 TRANSMIT AND RECEIVE FREQUENCY........................................................ 9
5.2.2 RX FREQUENCY TRIM ....................................................................................... 9
5.2.3 CARRIER DETECT............................................................................................. 10
5.2.4 RECEIVER DC OFFSET ADJUST ..................................................................... 10
5.2.5 RECEIVER GAIN ADJUST ................................................................................ 10
5.2.6 TRANSMITTER RF POWER OUTPUT ADJUST............................................. 11
5.2.7 TRANSMITTER BALANCE............................................................................... 11
5.2.8 TRANSMITTER DEVIATION............................................................................ 12
5.2.9 TX FREQUENCY TRIM ..................................................................................... 12
6
ADDITIONAL INFORMATION FOR A1 ASSEMBLIES................................. 13
6.1
Internal Adjustments............................................................................................. 13
6.1.1 Front-end Inductors............................................................................................... 13
6.1.2 VCTCXO Frequency Adjust................................................................................. 13
6.2
Active Component Voltage Chart for DTX-454 RF CCA ................................... 13
6.3
Active Component Voltage Chart for DTX-154 RF CCA ................................... 18
7
BLOCK DIAGRAM, PRODUCT STRUCTURE, PARTS LISTS, SCHEMATIC
DIAGRAMS, AND PARTS LAYOUTS ............................................................. 23