(1) FUNCTION OF OPERATING CONTROLS AND INDICATORS (See Figure 5-19)
a. ANTENNA SYSTEM POWER CIRCUIT BREAKER - The ANTENNA SYSTEMS-POWER circuit breaker,
CB3, controls application of the 120/208volt AC power to the Antenna System.
b. RADOME CONTROLS AND CIRCUIT BREAKERS - The radome controls and circuit breakers consist of:
CB1, RADOME POWER Circuit Breaker
M1, RADOME PRESSURE Meter
S1, DEICER Power Switch
S2, BLOWER Power Switch
DS1, PRESSURE SAFE Indicator Light
RADOME POWER (CB1) circuit breaker controls power application to the radome when the BLOWER (S2) power switch
is in the appropriate position. The DEICER (S1) power switch controls power to the deicers in the radome. When the
deicer is in operation, should radome pressure fall below 9 inches of water (approximately 0.35 psi) or the temperature in
the radome increase to 38 degrees Fahrenheit, pressure switches in the radome open, rendering the deicers inoperative.
c. SERVO EXCITATION CIRCUIT BREAKER- The SERVO EXCITATION circuit breaker (CB4) applies
primary power to the servo circuits in the Control Indicator and antenna pedestals.
d. WIND SPEED METER - The WIND SPEED meter (M2) indicates the local wind speed in mph. It is
connected to an anemometer mounted on a mast adjacent to the radome.
e. UTILITIES POWER - The UTILITIES circuit breaker (CB2) controls 115-vac power available at
convenience receptacles in the radome and on the tower.
f. AZIMUTH ORIENTATION - The AZ ORIENT control is used to set the true azimuth of the antenna
installation so that the TRUE AZIMUTH indicator on the Control Indicator unit will be correctly oriented for the site.
(2) LOCATION AND FUNCTION OF TEST POINTS AND ADJUSTMENTS (See Figure 5-20) - The location and
function of the test points and adjustments on the Antenna Control Power Supply are contained in Table 5-13.
C. ALIGNMENT AND ADJUSTMENT PROCEDURES - The only alignment and adjustment procedures which are to
be performed on the Power Supply when not connected into the system is zeroing the azimuth differential control