User's Manual

PINEAPPLE TECHNOLOGY, INC.
UTX5K ULTRA-2 Operating and Service Manual
V -- THEORY OF OPERATION
V
--- THEORY OF OPERATION (Page 1 of 5)
A
. INTRODUCTION
The UTX5K ULTRA-2 transmitter 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 UTX5K ULTRA-2 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.
This transmitter was designed for Analog (NTSC) transmission with provisions and options available to
convert to Digital Service at a later date if necessary.
Refer to the UTX5K ULTRA-2 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. ADCIS5 AC DISTRIBUTION
The
A
CDIS5 is the primary AC power inlet for the transmitter. The UTX5K ULTRA-2 transmitter was designed
for Standard 208 to 230 VAC 3-Phase using a FIVE (5) wire connection. The transmitter can be Optionally
powered as 220 to 240 VAC Single Phase using a four (4) wire connection.
Standard
Optional
--- 3 wires for 208 - 240 VAC 3 Phas
e
--- 2 wires for 220 -240 VAC Single Phase
--- 1 wire for neutral connection --- 1 wire for neutral connection
--- 1 wire for safety ground connectio
n
--- 1 wire for safety ground connection
CAUTION:
Connection to the AC Primary source must be made using all five wires listed above. Follow
the wiring instruction given in TRANSMITTER INSTALLATION Section lll.3. If not followed, severe damage to
the transmitter and, or, electrical shock could result.
The
A
CDIS5 performs the following functions:
1. Provides a primary AC power breaker point to shutdown the transmitter.
2. Provides 208 VAC power to each of the 2.2KW DC power supplies with individual breaker points for
added safety.
3.
Provides 110 VAC circuits for Modulator,
A
DP500, ABS (as necessary) and
A
UX Power where
needed.
SEE SECTION Vl.B FOR SCHEMATIC AND PARTS LIS
T
C. PS12KW POWER SUPPLY
The UTX5K ULTRA-2 transmitter is designed with over 12 KW of DC power. To achieve this level, the modules
mounted in the power supply in the transmitter rack consist of six (6) AC2008 power units with two (2)
A
C2009 main frame assemblies each of which are capable of managing three (3) 2 KW modules each.
The power modules are "HOT PLUGGABLE" and can be removed or installed without turning off the
transmitter.
Each power supply module has OVER VOLTAGE, OVER CURRENT AND OVER TEMPERATURE
protection as well as a fault signal in the event of a failure.
REFER TO MANUFACTURER'S MANUAL FOR MODEL # TWRI6004 PROVIDED WITH THE UTX5K ULTRA-2.
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