The SAFE position of the SAFE-RUN switch assures the servo drive cannot be activated;
however, voltage is still present inside the pedestal.
4. PREOPERATIONAL TEST CHECK LIST
Prior to performing the procedures contained in this paragraph, ensure that the procedures
contained in paragraphs 2 and 3 of this section have been performed.
A. INITIAL TURN-ON PROCEDURE
a. Set CB3, the ANTENNA SYSTEMS POWER circuit breaker, to the ON position. On the Antenna
Position Control Indicator, observe illumination of DS7, AZIMUTH MODE MANUAL indicator light. On the Antenna
Control Power Supply, observe that the RADOME PRESSURE meter is indicating radome pressure, and that the
PRESSURE SAFE indicator light is illuminated.
b. Set CB4, the SERVO EXCITATION circuit breaker, to the ON position.
a. Set the S1 SERVO DRIVE switch to the ON position. Observe illumination of DS4 SERVO DRIVE
on indicator and DS21, ELEVATION MODE MANUAL indicator.
If DS4 does not illuminate but DS18, the SAFETY ON indicator light illuminates, the SAFE-RUN
switch on the antenna pedestal is in the SAFE position or there is insufficient pressure in the
b. Rotate the azimuth handwheel CW. Observe that the TRUE AZIMUTH digital counter indicates an
increasing azimuth angle and the cable-wrap meter deflects toward its right red limit marking.