TM 11-5840-281-12-1
4-43.
ELEVATION ELECTRONIC FILTER ALINEMENT. (CONT)
8.
On elevation electronic filter in pulse generator, connect positive lead of multimeter to ANGLE VOLTS J703 and
connect negative lead to GND 701.
9.
On elevation electronic filter in pulse generator, adjust OFFSET control J710 to obtain exact OV indication on
multimeter.
10.
Disconnect test leads.
11.
On receiver-transmitter main power panel, place SCAN switch to ON position.
12.
On transmitter control panel, press REMOTE section of LOCAL-REMOTE indicator switch.
4-44.
AZIMUTH ELECTRONIC FILTER ALINEMENT.
1.
On master pulse generator, place SCAN switch to OFF position.
2.
On both pulse generators, place SCAN MODE switch to NORM position and place ANGLE VOLTS switch to
OPERATE position.
3.
On receiver-transmitter main power panel, place SCAN switch to OFF position.
4.
On transmitter control panel, press LOCAL section of LOCAL-REMOTE indicator switch.
5.
Manually position azimuth antenna to + 15 degrees as indicated on azimuth scan protractor.
6.
Set up multimeter to measure any positive dc voltage.
7.
On azimuth electronic filter in pulse generator, connect positive lead of multimeter to ANGLE VOLTS J703 and
connect negative lead to GND J701.
8.
On azimuth electronic filter in pulse generator, adjust OFFSET control J710 to obtain exact OV indication on
multimeter.
9.
Disconnect test leads.
10.
On receiver-transmitter main power panel, place SCAN switch to ON position.
11.
On transmitter control panel, press REMOTE section of LOCAL-REMOTE indicator switch.
4-45.
FIXED COIL AMPLIFIER ADJUSTMENT.
PERSONNEL REQUIRED: Two
NOTE
Unless otherwise indicated, perform the following steps on control-indicator where fixed
coil amplifier adjustment is being performed.
1.
On master pulse generator, place SCAN MODE switch to SEARCH position.
2.
On control-indicator, place BITE-AZ TILT switch to BITE position and place BITE SELECT switch to HORIZ
CURR position.
3.
On control-indicator, place NORM-OFFSET switch to OFFSET position.
4.
On fixed coil amplifier, adjust R2128 HORIZ CURRENT ADJ, R2123 VERT CURRENT ADJ, and R2109 VERT
BAL ADJ to mid position.
5.
On control-indicator, place BITE SELECT switch to VERT CTR position.
6.
On control-indicator, adjust VERT control on PPI CENTERING controls for center scale indication on AZ
TILT/BITE meter.
4-142
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