User Manual

DE
DANIELS
ELECTRONICS
UT-4B400 P25 Digital UHF Base Transmitter Instruction Manual iii
TABLE OF CONTENTS
1 GENERAL..................................................................................... 1-1
1.1 Introduction .............................................................................. 1-1
1.2 Manual Organization .................................................................... 1-1
1.3 UT-4B 406 - 470 MHz Transmitter Family Models................................ 1-1
1.4 Performance Specifications ............................................................ 1-2
1.4.1 General................................................................................ 1-2
1.4.2 Audio Specifications ................................................................. 1-4
1.4.3 Physical Specifications .............................................................. 1-4
2 THEORY OF OPERAT ION................................................................. 2-1
2.1 Transmitter Operation ................................................................... 2-1
2.2 Transmitter Programming.............................................................. 2-1
2.2.1 Transmitter Wide Options ........................................................... 2-2
2.2.1.1 Disable Front Panel Led.......................................................... 2-2
2.2.1.2 Secure Hardware Equipped...................................................... 2-2
2.2.1.3 Allow Emergency Transmissions............................................... 2-2
2.2.1.4 Allow Radio Inhibit ............................................................... 2-2
2.2.1.5 Allow Radio Check............................................................... 2-2
2.2.1.6 Enable Status ...................................................................... 2-2
2.2.1.7 Frequency Band................................................................... 2-2
2.2.2 Channel Wide Settings .............................................................. 2-3
2.2.2.1 Frequency.......................................................................... 2-3
2.2.2.2 Voice/Signal Type................................................................. 2-3
2.2.2.3 Squelch Type...................................................................... 2-3
2.2.2.4 CTCSS Tone ...................................................................... 2-3
2.2.2.5 Enable Reverse Burst............................................................. 2-3
2.2.2.6 DCS Code.......................................................................... 2-3
2.2.2.7 DCS Invert......................................................................... 2-4
2.2.2.8 Enable Turn Off Code............................................................ 2-4
2.2.2.9 Transmitter Power ................................................................ 2-4
2.2.2.10 Channel Bandwidth ............................................................. 2-4
2.2.2.11 Deviation .......................................................................... 2-4
2.2.2.12 Time Out Timer .................................................................. 2-4
2.2.2.13 Channel Status................................................................... 2-4
2.2.2.14 Transmitter Pre-emphasis....................................................... 2-4
2.2.2.15 NAC Transmitter Code ......................................................... 2-5
2.2.2.16 NAC Transmitter ................................................................ 2-5
2.3 Transmitter Programming using Motorola Radio Service Software .............. 2-5
2.4 Secure Communications ................................................................ 2-6
2.5 Transmitter Assembly and Adjustment ............................................... 2-6
2.5.1 Controller Board Alignment ........................................................ 2-6
2.5.1.1 Reference Oscillator Adjustment ................................................ 2-7