User's Guide

DE
DANIELS
ELECTRONICS
UHF Transmitter Instruction Manual UT-3 896 - 960 MHz 1-1
1 GENERAL
1.1 Introduction
The UT-3 896 - 960 MHz transmitter is a low power, synthesized, FM transmitter, capable of
operation in 6.25 KHz channels. The transmitter operates in three frequency bands:
896 - 902 MHz, 928 - 935 MHz, and 935 - 960 MHz and power output is adjustable from 0.5W to
3.0W. A modular design allows each of the transmitter's modules: OS-3 896 - 960 MHz
synthesizer, UT-3 800/900 amplifier, MT-3 audio processor, and MT-3 transmitter main board to
be individually assembled and tested. This facilitates construction, maintenance, as well as
troubleshooting procedures. The synthesizer module can be programmed to have up to 16 channels
exclusive to one frequency band (896 - 902 MHz, 928 - 935 MHz, or 935 - 960 MHz) making the
UT-3 an extremely versatile transmitter. In addition, the UT-3 896 - 960 MHz transmitter is
capable of standard modulation or low frequency modulation.
The UT-3 896 - 960 MHz transmitter is designed to interface with Daniels Electronics' MT-3
Repeater System while maintaining MT-2 System compatibility. Both repeater systems are
characterized by dependable, low maintenance performance under the most severe environmental
conditions.
1.2 Manual Organization
The organization of this manual reflects the modular makeup of the UT-3 product line. Each
module is fully described within its respective submanual, all of which are contained within this
document. In general, each submanual contains:
1. A functional description and specification summary,
2. A detailed technical description (Theory of Operation) and
3. Assembly, setup and alignment procedures relevent to that particular module.
The module manuals are as follows.
Note: material presented in a given "sub-manual" may include information related to other module
versions not directly appllicable to the 896 - 960 MHz Transmitter family (eg, the Low Current
Synthesizer Instruction Manual OS(R/T)-3 covers models from 132 MHz to 960 MHz).
UHF Transmitter Instruction Manual UT-3 896 - 960 MHz: This manual provides an overview of
the complete transmitter, manual organization and assembly in terms of the other modules.
MT-3 Transmitter Main Board Instruction Manual: This manual pertains to the audio processor
module, transmitter Main Board and Front Panel Board. Most of the user selectable options are
accessed within the Transmitter Main Board module, including channel selection. Since all external
connections (including power and signal lines) are made to the Transmitter Main Board, most of the
material pertaining to transmitter operation and installation is found here.