TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
Bubble remains centered in
3 ---------------- None ------------------------
Rotate azimuth Antenna AS-
clinometer level in all
1292/TPN-8 cw by hand
quadrants.
through one full revolution,
stopping approximately ever 90
deg. Observe clinometer bubble
leve at each 90-deg point.
a. Clinometer attaches to
a. Remove clinometer from
4 ---------------- None ------------------------
clinometer mount prop-
azimuth Antenna AS-1292/
erly. Clinometer mount
TPN-8 and install on eleva-
is tight and serviceable;
tion Antenna AS-1291/
with thin film of preser-
TPN-8. Inspect clinometer
vative lubricant on sur-
mount for damage, wear, and
faces.
tightness.
b. None.
b. Remove clinometer from
elevation Antenna AS-
1291/TPN-18.
4-5. Testing Radar
b. Equipment Conditions.
Receiver-Transmitter RT-818/TPN-18
Dc Voltage Supplies
(1) Radar Set AN/TPN-18 turned on.
a. Test Equipment Required.
(2) Front and rear covers removed from
(1) Multimeter ME-26A/U (vtvm)
Radar Receiver-Transmitter RT-818/TPN-18.
(2) Electronic Voltmeter ME-202A/U (dif-
(3) Primary 3-phase input power is stable at
ferential voltmeter)
120/208 vac.
c. Procedure.
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
Radar Receiver-
Transmitter
RT-818/TPN-18
control panel
a. 5.9 vac min, 6.7 vac
a. Connect multimeter COM-
Vim
1
SCAN: OFF
max.
MON and AC test leads
RANGE: 10 VOLTS HV: OFF
between pins 2 and 7 of
SELECTOR: AC
P8601. Observe ac indication.
b. None.
b. Disconnect test leads ---------------------
a. None.
a. Connect test lead between
Differential As last indicated ----
2
negative (-) terminal on
differential voltmeter and
POWER: ON
GRD testpoint TP101 (on
OPERATE-CALI-
fuse panel) and a second
BRATE: OPERATE
test lead between (+) ter-
Differential
minal and -35V testpoint
TP8402 on 36V voltage
RANGE: 50
regulator.
NUILL: VTVM, 10 to 0.1
b. -35 vdc.
b. On 35v voltage regulator,
in progressive steps.
adjust -85V ADJ control
Polarity:-
R3427 for -35v u indicated
A: 3
on differential voltmeter.
B: 5
c. Disconnect differential volt-
c. None.
C: 0
meter positive (+) test lead.
D: 0
E: 0
4-4
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