User Manual
Table Of Contents
- 1GENERAL
- 1.1Introduction
- 1.2Manual Organization
- 1.3UT-4B 406 - 470 MHz Transmitter Family Models
- 1.4Performance Specifications
- 1.4.1General
- 1.4.2Audio Specifications
- 1.4.3Physical Specifications
- 2THEORY OF OPERATION
- 2.1Transmitter Operation
- 2.2Transmitter Programming
- 2.2.1Transmitter Wide Options
- 2.2.1.1Disable Front Panel Led
- 2.2.1.2Secure Hardware Equipped
- 2.2.1.3Allow Emergency Transmissions
- 2.2.1.4Allow Radio Inhibit
- 2.2.1.5Allow Radio Check
- 2.2.1.6Enable Status
- 2.2.1.7Frequency Band
- 2.2.2Channel Wide Settings
- 2.2.2.1Frequency
- 2.2.2.2Voice/Signal Type
- 2.2.2.3Squelch Type
- 2.2.2.4CTCSS Tone
- 2.2.2.5Enable Reverse Burst
- 2.2.2.6DCS Code
- 2.2.2.7DCS Invert
- 2.2.2.8Enable Turn Off Code
- 2.2.2.9Transmitter Power
- 2.2.2.10Channel Bandwidth
- 2.2.2.11Deviation
- 2.2.2.12Time Out Timer
- 2.2.2.13Channel Status
- 2.2.2.14Transmitter Pre-emphasis
- 2.2.2.15NAC Transmitter Code
- 2.2.2.16NAC Transmitter
- 2.3Transmitter Programming using Motorola Radio Service Software
- 2.4Secure Communications
- 2.5Transmitter Assembly and Adjustment
- 2.5.1Controller Board Alignment
- 2.5.1.1Reference Oscillator Adjustment
- 2.5.1.2Transmitter Deviation Balance Adjustment
- 2.5.1.3Transmitter Deviation Limit Adjustment
- 2.5.2Amplifier Alignment
- 2.5.3Frequency Change
- 2.6Recommended Test Equipment List
- 2.7Repair Note
- 2.8Printed Circuitboard Numbering Convention
- 3ILLUSTRATIONS
- 3.1Digital Base Transmitter Front Panel
- 3.2Digital Base Transmitter Case - Exploded View
- 3.3Digital Base Transmitter Block Diagram
- 3.4Digital Base Transmitter Schematic Diagram
- 3.5Digital Base Transmitter Main Board Component Layout (Bottom)
- 3.6Digital Base Transmitter Main Board Component Layout (Top)
- 4PARTS LIST
- 4.1Base Transmitter Main Board Parts List
- 4.1.1Base Transmitter Main Board Electrical Parts List
- 4.1.2P25 Base Transmitter Mechanical Parts List
- 5REVISION HISTORY
DE
DANIELS
ELECTRONICS
1-4 UT-4B400 P25 Di
gital
UHF Base
Transmitter
Instruction
Manual
1.4.2
Audio Specifications
Audio Input:
Unbalanced, 600 or 47k5 ohm selectable input impedance.
Audio Response:
Pre-emphasis (6 dB per octave); +0.5 to -2.0 dB from 300 Hz
to 3 kHz;
Audio Deviation Limiting:
+/-
2.5 kHz, +/- 5.0 kHz
Audio Distortion:
Less than 3% THD; 1 kHz tone at 1.5 kHz or 3 kHz deviation
(-40°C to +60°C).
Hum and Noise:
-45 dB typical
1.4.3
Physical Specifications
Physical Dimensions:
Width:
Height:
Depth:
7.1 cm (2.8 in)
12.8 cm (5.05 in)
19 cm (7.5 in)
Module Weight:
1.5 kg (3.3 lbs.)
Corrosion Prevention:
Anodized aluminum construction. Stainless steel hardware.
Selectively conformal coated glass epoxy 2 and 4 layer printed
circuit boards. Gold plated module connectors.
Module Design:
Compac
t Eurostandard modular design. Plug-in modules
mate with Daniels standard M3 repeater subrack. Subracks /
modules comply with IEEE 1101, DIN 41494 and IEC 297-3
(mechanical size / modular arrangement).
External Connections:
RF Connection: type N connecto
r located on the transmitter
module front panel. Motherboard Connections (Audio,
Power, and Control) are made through a 48 pin, gold plated,
type F connector on the rear of the transmitter module. User
connection made through mated "mother board" assembly of
the repeater subrack. Type F standard connector complies
with DIN 41612 Level 2 (200 mating cycles, 4 day 10 ppm
SO2
gas test with no functional impairment and no change in
contact resistance). Digital I/O: 8-pin RJ-45
Handle Text Colour:
Black