Codan Radio Communications VT-4D150 User Manual
P25 Digital VHF Transmitter Instruction Manual
IM21-001
iii
Contents
General Information ...............................................................
1
Introduction ................................................................................................
1
Performance Specifi cations .......................................................................
2
Theory of Operation ...............................................................
5
General ......................................................................................................
5
Jumper Functions and Standard Confi guration ........................................
7
Test Points .................................................................................................
8
Transmitter Programming ........................................................................
10
Transmitter Assembly and Adjustment.................................
13
Repair Note..............................................................................................
13
Recommended Test Equipment List ........................................................
14
Transmitter Assembly and Adjustment.....................................................
14
Frequency Change ..................................................................................
14
Digital Signal Processor Board Alignment ...............................................
15
Repeater System Confi guration...........................................
19
Digital Repeater .......................................................................................
19
Repeater System Troubleshooting...........................................................
20
Illustrations and Schematics ................................................
23
P25 Digital Transmitter Front Panel .........................................................
24
P25 Digital Transmitter Block Diagram ....................................................
25
P25 Digital Transmitter Main Board Component Layout - Bottom ...........
26
P25 Digital Transmitter Main Board Component Layout - Top.................
27
P25 Digital Transmitter Schematic Diagram ............................................
28
P25 Adapter Board Component Layout ...................................................
29
P25 Adapter Board Schematic Diagram ..................................................
29
Parts Lists ............................................................................
31
P25 Digital Transmitter Electrical Parts List .............................................
31
P25 Digital Transmitter Mechanical Parts List .........................................
34
P25 Adapter Board Parts List...................................................................
35
Revision History ...................................................................
37