TM 11-5840-281-35/1
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
f.
f.
Examine height finder cursor
No excessive widening
for breaks and excessive
or breaks in height
widening.
finder cursor.
g. Place RANGE MILES switch
g. No excessive widening
to 40 and examine height
or
finder cursor for breaks and
breaks in height finder
excessive widening.
cursor.
6
...............................As last indicated, except:
a. On Control-Indicator C-6988/
Master Control-lndicator
a. No excessive widening
TPN-18 under test, examine
C-6988/TPN-1 8
azimuth cursor for breaks
or
SCAN MODE: 60 AZ
and excessive widening.
breaks in azimuth
b. Place RANGE MILES switch
cursor.
to 20 and 10. Examine azimuth
cursor in 20- and 10-mi scans.
b. No excessive widening
Push in Pulse Generator 0-1333/
TPN-18 and tighten two
or breaks in azimuth
thumbscrews.
cursor.
None.
b. Equipment Conditions.
4-23. Testing Azimuth Tilt and Elevation Servo
(1) Radar Set AN/TPN-18 turned on and aligned.
a. Test Equipment and Materials Required. Cli-
(2) Radar Set group level.
nometer MP3502 (clinometer).
.
c. Procedure
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
Radar Receiver-
a. Attach clinometer to clinom-
a. None.
1
...............................
Transmitter RT-818/
eter mount on azimuth Anten-
na AS-1292/TPN-8.
TPN-18 control panel
b. On master Control-Indicator
b. None.
MAIN POWER: ON
C-6988/TPN-18, place AN-
SCAN: OFF
TENNA (servo) switch to U or
HV: OFF
D, as required to position
Master Control-Indicator
azimuth Antenna AS-1292/
C-6988 ITPN-18 and
TPN-8 at 3 deg as indicated
Pulse Generator
on clinometer.
O-1S33/TPN-18
c. Place ANTENNA (servo)
c. None.
POWER: ON
switch to L or R as required to
TRANSMITTER: OFF
position elevation Antenna
SCAN MODE: NORM
AS-1291/TPN-8 at 0 deg as
SCAN: OFF
indicated on elevation pro-
tractor.
d. On master Control-Indicator
d. AZ TILT meters
C-6988/TPN-18 and Control-
indicate
Indicator C-6988/TPN-18
3 deg.
under test, observe indication
on AZ TILT meter.
a. On Control-Indicator C-6988/
2
...............................As last indicated, except:
a. None.
TPN-18 under test, adjust
Pulse Generator
INTENSITY and FOCUS
O-l SJ/TPN-18
controls for normal operating
under test
level and definition.
ANGLE VOLTS switch:
b. On Pulse Generator 0-1333/
EL
b. Artificial elevation
TPN-18 rotate ANGLE
VOLTS control fully ccw.
sweep at bottom of
Observe position of artificial
normal elevation scan
elevation sweep and range
and range marks are
marks.
present.
4-59
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