User's Manual

300-Watt UHF Digital Transmitter Chapter 1, Introduction
DT830A, Rev. 1 1-1
Chapter 1
Introduction
This manual explains the installation,
setup, alignment, and maintenance
procedures for the DT830A 300-watt
digital UHF transmitter. It is important
that you read all of the instructions,
especially the safety information in this
chapter, before you begin to install or
operate the unit.
1.1 Manual Overview
This instruction manual is divided into
five chapters and supporting appendices.
Chapter 1, Introduction, contains
information on safety, the Axcera method
of assigning assembly designation
numbers, maintenance, return
procedures, and warranties. The second
chapter describes the transmitter and its
system control and status indicators and
remote control connections. Chapter 3
explains how to unpack, install, set up,
and operate the transmitter. Chapter 4,
Circuit Descriptions, describes the circuits
that make up the trays and assemblies in
the transmitter. Chapter 5, Detailed
Alignment Procedures, provides
information on adjusting the system
assemblies for optimal operation. The
appendices contain sample log sheets,
typical operational readings, assembly
and subassembly drawings and parts list,
and product information for vendor-
supplied products used in the
transmitter.
1.2 Assembly Designation Numbers
Axcera has assigned assembly numbers,
such as Ax (x=1,2,3…), to all assemblies,
trays, and boards that are referenced in
the text of this manual and shown on the
block diagrams and interconnect
drawings provided in the appendices.
These supporting documents are
arranged in increasing numerical order in
the appendices. Section titles in the text
for assembly or tray descriptions or
alignment procedures also indicate the
associated part number(s) and the
relevant appendices. Sections describing
vendor-supplied items, such as meters
and power supplies, do not contain this
information.
1.3 Safety
The 300-watt UHF transmitters
manufactured by Axcera are designed to
be easy to use and repair while providing
protection from electrical and mechanical
hazards. Listed throughout the manual
are notes, cautions, and warnings
concerning possible safety hazards that
may be encountered while operating or
servicing the transmitter. Please review
these warnings and familiarize yourself
with the operation and servicing
procedures before working on the
transmitter.
Read All Instructions – All of the
operating and safety instructions should
be read and understood before operating
this equipment.
Retain Manuals – The manuals for the
transmitter should be retained at the
transmitter site for future reference. We
provide two sets of manuals for this
purpose; one set can be left at the office
while one set can be kept at the site.
Heed Notes, Warnings, and
Cautions – All of the notes, warnings,
and cautions listed in this safety section
and throughout the manual must be
followed.
Follow Instructions – All of the
operating and use instructions for the
transmitter should be followed.
Cleaning – Unplug or otherwise
disconnect power from the equipment
before cleaning. Do not use liquid or
aerosol cleaners. Use a damp cloth for
cleaning.