User Manual

DE
DANIELS
ELECTRONICS
iv VT-4B150 VHF Project 25 Digital Base Transmitter Instruction Manual
2.5.1.2 Trans mitter Deviation Balance Adjustment ..................................... 2-7
2.5.1.3 Transmitter Deviation Limit Adjustment ........................................ 2-7
2.5.2 Amplifier Alignment .................................................................. 2-8
2.5.3 Frequency Change.................................................................... 2-8
2.6 Recommended Test Equipment List................................................... 2-8
2.7 Repair Note............................................................................... 2-9
2.8 Printed Circuitboard Numbering Convention ........................................ 2-9
3 ILLUSTRATIONS ............................................................................ 3-1
3.1 MT-4 Base Transmitter Front Panel................................................... 3-1
3.2 MT-4 Transmitter Case - Exploded View............................................. 3-2
3.3 Digital Base Transmitter Block Diagram .............................................. 3-3
3.4 Digital Base Transmit ter Schematic Diagram ......................................... 3-4
3.5 Digital Base Transmitter Main Board Component Layout (Bottom) ............... 3-5
3.6 Digital Base Transmitter Main Board Component Layout (Top)................... 3-6
4 P ARTS LIST ................................................................................... 4-1
4.1 P25 Base Transmitter Main Board Parts List......................................... 4-1
4.1.1 P25 Base Transmitter Main Board Electrical Parts List.......................... 4-1
4.1.2 P25 Base Transmitter Mechanical Parts List ...................................... 4-3
5 REVISION HISTORY ........................................................................ 5-1
MODULE MANUALS
VHF Amplifier Instruction Manual VT-3 132 - 174 MHz ............ IM21-VT3150AMP