k. Use the precision drive handwheel on the Antenna Pedestal Subassembly
AB-6431/FPN, and manually position the Antenna AS-1079/FPN (azimuth antenna)
until the azimuth protractor on Antenna Pedestal Subassembly AB-643/FPN
indicates the given tangent angle 0-1.
l. Perform the following on the navigational computer chassis:
(1) Unlatch release handles and pull chassis forward fan enough to gain
access to the CUR LIN ADJ potentiometers A21 through A24.
(2) Alternately place the ART EL-OPERATE-ART AZ Switch S-401 to the ART
AZ and OPERATE positions while adjusting the ANGLE VOLTS, ARTIFICIAL Control
R-402 until the artificial sweep superimposes the radar sweep.
(3) Place the ART EL-OPERATE-ART AZ Switch S-401 to the ART AZ position.
(4) Connect a multimeter between the ANGLE VOLTS OUTPUT Test Point TP-
405 and the GROUND Test Point TP-419.
CAUTION
ENSURE MULTIMETER IS SET TO MEASURE DC VOLTAGES.
(5) Observe and record the voltage indication on the multimeter.
m. Use the precision drive handwheel on the Antenna Pedestal Subassembly
AB-642/FPN and manually position the azimuth antenna until the azimuth
protractor on the Antenna Pedestal Subassembly AB-643/FPN indicates the
given tangent angle 0-2.
n. Perform the following on the navigational computer chassis:
(1) Alternately place the ART EL-OPERATE-ART AZ Switch S-401 to the ART
AZ and OPERATE positions while adjusting the ANGLE VOLTS, ARTIFICIAL Control
R-402 until the artificial sweep superimposes the radar sweep.
(2) Place the ART EL-OPERATE-ART AZ Switch S-401 to the ART AZ position.
(3) Observe and record the voltage indicated by the multimeter.
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