TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
Leveling jacks are clean
7 ---------------- None ------------------------
Inspect 3 leveling jacks in An-
and threads not burred.
tenna Pedestal AB-78/TPN-
Leveling jack screws are
8 for mechanical fitness and
lightly lubricated and
serviceability.
operate freely.
Seals on Radar Receiver-
8 ---------------- None ------------------------
Inspect seats on control panel,
Transmitter RT-818/
font and and rear covers of
TPN-18 covers are re-
Radar Receiver-Transmitter
silient, properly installed
RT-818/TPN-18 for lack of
and provide good seal
resiliency, uneven bonding, and
when installed in place.
improper installation.
9 ---------------- None ------------------------
No evidence of missing or
Inspect interior of Radar Re-
damaged items and
ceiver-Transmitter RT-818/
mounting hardware. Elec-
TPN-18 for mechanical fitness,
tronic chassis and circuit
proper installation of chassis
cards are properly in-
and circuit cards, correct cable
stalled and secured. In-
connections, proper amperage
terconnections are tight.
values of installed fuses, instal-
All fuses are of correct
lation of tube shields, and tight-
size and ampere value (as
ness of all switches, controls,
marked on equipment).
meters, fuse holders, and test-
Tube shields are installed
points
on tube panel
mounting for controls,
switches, meters, fuse-
holders, and testpionts
are tight.
No evidence of corrosion
Inspect exterior painted surfaces
10 -------------- None ------------------------
or damage to exterior
for bare metal and corrosion.
painted surfaces.
NOTE. Do not replace covers
on Radar Receiver-Transmitter
RT-818/TPN-18 until tests are
completed.
4-4. Testing Radar Set Group
b. Equipment Conditions.
Leveling System
(1) Radar Set AN/TPN-18 turned off.
(2) Clinometer installed on azimuth Antenna
a. Test Equipment and Materials Required. Cli-
AS-1292/TPN-8.
nometer MP3537 (clinometer).
c. Procedure.
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
Bubble centered in level.
1 ---------------- None ------------------------
Adjust 3 leveling jacks in legs of
Center marking on level
Antenna Pedestal AB-738/TPN-
is clear and level is tight
8 as required to center bubble
in mounting.
in level on elevation Antenna
Drive TG-114/TPN-8.
Bubble is centered in clinom-
Adjust clinometer (installed on
2 ---------------- None ------------------------
eter level. Clinometer
azimuth Antenna AS-1292/
and clinometer mount are
TPN-8) so that bubble is cen-
tight.
tered in clinometer level. Azi-
muth Antenna AS-1292/
TPN-8 may be at any azimuth
bearing
4-3
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