TM 11-5840-281-12-1
4-28. CIRCUIT ALINEMENT. (CONT)
CURSOR ALINEMENT (CONT)
21.
Accurately set ART ANGLE V control on pulse generator to 5-mile intercept setting recorded in step 12 or 17.
22.
Adjust applicable CL VER control on pulse generator to midposition.
23.
Alternately place ANGLE VOLTS switch on pulse generator in AZ and OPERATE positions. Adjust applicable
COURSELINE and CL VER controls so azimuth cursor (3) intersects 5-mile range mark (11) where artificial
sweep trace (10) crosses 5-mile range mark (11).
24.
Repeat steps 20 through 25 until azimuth cursor (3) is positioned as indicated in both steps 20 and 23.
Elevation Cursor
This procedure requires two personnel: one at radar site and one at control-indicator site.
1.
Ensure all controls and switches are in positions indicated in Preliminary Operating Procedure (para 2-5).
2.
On transmitter main power panel, place SCAN and HV switches to OFF position.
3.
At radar site, Install clinometer on elevation antenna clinometer mount. See Clinometer Installation (para 4-21).
4.
Adjust clinometer to indicated ground angle determined in paragraph 4-9. Manually tilt elevation antenna until
clinometer bubble is centered. Maintain antenna in this position.
NOTE
By switching ANGLE VOLTS switch back and forth in EL and OPERATE positions, operate
and artificial sweep traces can be viewed at the same time.
5.
On pulse generator, alternately place ANGLE VOLTS switch in EL and OPERATE positions. Ad- just ART
ANGLE V control so artificial sweep trace coincides with operate sweep trace on elevation display. Record ART
ANGLE V control dial indication. This is the control setting for elevation cursor alinement at td (td setting).
6.
Adjust clinometer to indicate elevation cursor alinement angle determined previously, then manually tilt elevation
antenna until clinometer bubble gives level indication.
7.
On pulse generator, alternately place ANGLE VOLTS switch in EL and OPERATE positions. Ad- just ART
ANGLE V control so artificial sweep trace coincides with operate sweep trace on elevation display. Record ART
ANGLE V control dial indication. This is the ART ANGLE V control setting for 5-mile intercept (gp setting).
WARNING
To prevent injury to personnel from scanning, radiating antennas, ensure SCAN switch on
master pulse generator and TRANSMITTER switch on master control-indicator are in OFF
position before performing step 8.
8.
Place SCAN switch and HV switch on receiver-transmitter main power panel to ON position.
4-96
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