User's Manual

PINEAPPLE TECHNOLOGY, INC.
UTX1K ULTRA Operating and Service Manual
V -- THEORY OF OPERATION
V
--- THEORY OF OPERATION (Page 1 of 2)
A
. INTRODUCTION
The DTC25U transcoder was designed to meet or exceed all FCC applicable specifications for
TV broadcast equipment. Special attention was given to the selection of sub-assemblies and components
to achieve maximum reliability and minimum down time. The construction of the DTC25U is
BASIC and MODULAR with most components field replaceable. Special emphasis was placed on
"KEEPING IT SIMPLE" and returning to more traditional transmitter layouts and instrumentation.
Refer to the DTC25U block diagram for an overview of the transmitter architecture. This will
give the technician basic information needed to understand the operation of the transmitter and the function
of each subassembly.
SEE SECTION Vl.A FOR PARTS LIST AND BLOCK DIAGRAM.
B. XC100LC Regenerative Transcoder
B-1 Exciter
Refer to the Larcan user manual for information on the exciter portion of the transcoder.
SEE SECTION VI.B FOR SCHEMATIC AND PARTS LIS
T
B-2. Drake Up Converter
Refer to Drake user manual for information on the operation of this portion of the transcoder.
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