INTRODUCTION
1 - 2
· Power Supply
· Resolver/Digital PC Board
· Display Board Assembly
· Binary/BCD Board Assembly
· Switch PC Board Assembly
The front panel contains the POWER ON/OFF switch that controls the power to the
circuit boards on the 7122B/7133B ACU.
The 7122/7133 Controller Resolver to Digital PC Board Assembly (800029) converts
the analog output of the elevation, azimuth, and polarization resolvers to digital.
The 7122/7133 A, B, and C Antenna Control Unit Front PC Board (800026) contains
seven-segment displays and associated circuitry for display of the elevation, azimuth,
and polarization positions of the antenna.
The Front Switch PC Board (800032 - 7133B; 800050 - 7122B) contains three-
position momentary on/off switches that control the elevation, azimuth, and
polarization movement of the antenna.
1.2.1.2 7122B/7133B OU Drive Cabinet
The 7122B/7133B OU consist of the following major components:
· Swing-Out Panel
· MAIN POWER Circuit Breaker
· EMERGENCY STOP Switch
· 24 VDC Power Supply
· Reversing Starters
· Relay PC Board
The swing-out panel allows the operator to control antenna movement from the
proximity of the antenna.
The MAIN POWER circuit breaker controls the main power and the power to the OU
cabinet and the limit switches.
The EMERGENCY STOP switch, when pressed, removes power from the drive
motors.
The 24 VDC power supply provides operating voltage to the 7122B/7133B OU
antenna drive relay circuit board.