User's Manual

PINEAPPLE TECHNOLOGY, INC.
UTX5K ULTRA-2 Operating and Service Manual
V -- THEORY OF OPERATION
(CONTINUED) Page 4 of 5
G. UDR100AC 100 WATT DRIVER AMPLIFIER
The RF output from the MA2000 Modulator is applied to the input of the UDR100AC driver amplifier.
This amplifier increases the drive level to that required for each of the six (6) PA1K power
amplifiers to make rated power. The UDR100AC is powered by 110 VAC.
REFER TO SECTION Vl.C. FOR SCHEMATIC DIAGRAM AND PARTS LIST
.
H. S6 6-WAY SPLITTER
The S6 Splitter is an 6-Way in-phase broadband splitter. This splitter provides an equal split of drive
power to each of the six (6) PA1K power amplifiers in each transmitter rack.
SEE SECTION Vl.G. FOR PARTS LIS
T
I. MFA2PA POWER AMPLIFIER HOUSING
The MFA2PA is the main RF Power Amplifier housing which accommodates two (2) PA1K Amplifiers.
The housing includes the following:
2 each 330 CFM cooling fans
2 each
A
ir filter assemblies
2 each Front panel status PC boards
1 each
Main chassis
2 each Mechanical slide assemblies
1 each
A
C Filtered inle for cooling fans
SEE SECTION Vl.D FOR SCHEMATICS AND PARTS LIS
T
I-1. PA1K POWER AMPLIFIER
The PA1K is the main RF Power Amplifier Assembly used in the UTX5K ULTRA.
Each amplifier assembly is made up of one (1) U250LD power pallet and two (2) U500LDA power
pallets. These amplifiers are operated in Class A/AB or sometimes referred to as "HARD AB". This
refers to the bias levels to achieve best linerarity.
Each PA1K amplifier assembly includes the following:
1 each U250LD power pallets
2 each U500LDA power pallets
1 each Phase and gain matching circuit
1 each 2-Way in-phase splitter
1 each 2-Way in-phase combiner
1 each Circulator
1 each Power distribution module (1A0025)
2 each Thermal sensors
1 each Remote monitor port (DB9)
1 each Front panel status port (Molex)
1 each Filtered DC input port
1 each Type N Panel mounted RF Input port
1each DIN 7/16 Panel mounted RF Output port
SEE SECTION Vl.E. FOR SCHEMATICS AND PARTS LIST
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