Codan Radio Communications UT-3-460-S08 User Manual

Audio Processor Board Instruction Manual

iii

Page

1

FM AUDIO PROCESSOR .............................................................................................1-1
1.1

Introduction ..........................................................................................................1-1

1.2

Block Diagram (FM Audio Processor).................................................................1-3

1.3

FM Audio Processor Board Pin Connections.......................................................1-4

1.4

Factory Configuration...........................................................................................1-4

1.5

Turn-on Time........................................................................................................1-5

1.6

Low Frequency Modulation..................................................................................1-5

1.7

Transmitter Standby Modes..................................................................................1-5

2

SIGNALS.........................................................................................................................2-1
2.1

FM Audio Processor Outputs...............................................................................2-1

2.2

Modulation Output ...............................................................................................2-1

2.3

Low Frequency / Direct Mod. Output...................................................................2-1

2.4

Microphone Input.................................................................................................2-1

2.5

Balanced Input......................................................................................................2-1

2.6

Auxiliary Input......................................................................................................2-2

2.7

Subtone Inputs......................................................................................................2-2

2.8

Direct Modulation Input .......................................................................................2-2

3

THEORY OF OPERATION ............................................................................................3-1

4

ALIGNMENT..................................................................................................................4-1
4.1

Standard Deviation Adjustment.............................................................................4-1

4.2

Balanced Input Setup............................................................................................4-1

4.3

Microphone Input Setup.......................................................................................4-1

4.4

Subtone Input Setup .............................................................................................4-2

4.5

Balanced Input Frequency Response....................................................................4-2

5

TROUBLESHOOTING - TEST EQUIPMENT NEEDED ............................................5-1
5.1

Balanced Input Test ..............................................................................................5-1

5.2

Frequency Response Test.....................................................................................5-1

5.3

Subtone Input Test................................................................................................5-2

5.4

Audio benchmarks ................................................................................................5-2

6

TEMPERATURE COMPENSATION ............................................................................6-1

7

ILLUSTRATIONS, TABLES AND SCHEMATIC DIAGRAMS ..................................7-1
7.1

Special Jumper Configuration Table.....................................................................7-1

7.2

FM Audio Processor Component Layout.............................................................7-2

7.3

FM Audio Processor Schematic Diagram.............................................................7-3

8

FM AUDIO PROCESSOR PARTS LIST.......................................................................8-1

9

AM AUDIO PROCESSOR.............................................................................................9-5
9.1

Introduction ..........................................................................................................9-5

9.2

Performance Specifications...................................................................................9-5

9.3

Audio Specifications .............................................................................................9-6