Codan Radio Communications VT-3H040-S-HSO User Manual

VT-3H040 VHF Enhanced Transmitter Instruction Manual 

iii 

 

Page 

1 GENERAL 

1.1 Introduction.................................................................................................... 1-1 
1.2 Manual 

Organization ..................................................................................... 1-1 

1.3 

VT-3H040 Transmitter Family Models ......................................................... 1-2 

1.4 Performance 

Specifications ........................................................................... 1-3 

1.4.1 General............................................................................................... 1-3 
1.4.2 Audio 

Specifications.......................................................................... 1-5 

1.4.3 Physical 

Specifications ...................................................................... 1-6 

2 SYSTEM 

OVERVIEW 

2.1 Transmitter 

Operation.................................................................................... 2-1 

2.2 Frequency 

Selection....................................................................................... 2-2 

2.3 

Transmitter Assembly and Adjustment ......................................................... 2-2 

2.3.1 

Complete Transmitter Alignment ...................................................... 2-3 

2.3.2 Frequency 

Change ............................................................................. 2-3 

2.3.3 

Output Power Adjustment.................................................................. 2-4 

2.3.4 Deviation 

Setting ............................................................................... 2-5 

2.3.5 

Setting RF Alarm Thresholds ............................................................ 2-5 

2.4 

Recommended Test Equipment List.............................................................. 2-5 

2.5 Repair 

Note .................................................................................................... 2-6 

2.6 

Printed Circuitboard Numbering Convention................................................ 2-6 

3 ILLUSTRATIONS 

3.1 

MT-3 Transmitter Front Panel....................................................................... 3-1 

3.2 

MT-3 Transmitter Case - Exploded View ..................................................... 3-2 

4 PARTS 

LISTS ........................................................................................................... 4-1 

5 REVISION 

HISTORY............................................................................................... 5-1 

MODULE MANUALS 
 

Transmitter Main Board Instruction Manual  ....................................IM20-MT3TXMN 

 

VT3H040 VHF Amplifier Instruction Manual .............................. IM20-VT3040AMP 

 

OS-3A/H Enhanced Synthsizer Instruction Manual 29-470 MHz  ......... IM10-OS3AH 

 

VT-3H040 Channel Designation Table  .......................................... IM20-VT3H040CT