TM 11-5840-281-35/1
Control settings
Step No.
Test equipment
Equipment under test
Test procedure
Performance standard
n.
n.
If dbm indication recorded in
Sum or difference of
m above is positive, add it to
dbm setting and indica-
tion. (I and m above).
dbm setting recorded in l
above. If dbm indication
recorded in m above is nega-
tive, subtract it from dbm
setting recorded in l above.
Record results.
o.
Add dbm marked on azimuth
o.
44 dbm min, 49 dbm
directional coupler to sum or
max.
difference of dbm setting and
indication recorded in n above.
p.
On radar test set, adjust ADD
p.
None
TO PWR. METER control to
obtain approximate midscale
indication on power meter.
q.
Rotate FREQUENCY
q.
Micrometer setting on
METER control (absorbtion
FREQUENCY METER
cavity) slowly through its
control.
range until there is slight dip
in power meter indication.
Adjust FREQUENCY
METER control for minimum
indication on power meter and
record FREQUENCY METER
control micrometer setting.
r.
Convert micrometer setting
r.
Converted FRE-
recorded in q above to fre-
QUENCY METER
quency by use of frequency
control setting is
meter calibration chart at right
operating frequency.
of FREQUENCY METER
control. Record determined
frequency.
3
------------------------------
-------------------------------------
Disconnect radar test set --------------------------- None.
NOTE. Do not replace covers
on Radar Receiver. Transmitter
RT-818/TPN-18 until tests are
completed.
4-13.
Testing Antenna System
(2) Radar set group level.
(3) If Radar Set AN/TPN-18 is operated
a.
Test Equipment Required.
with Interrogator Set AN/TPX-44 in a landing
(1) Clinometer MP8602 (clinometer).
control central system, Interrogator Set AN/
(2) Sighting scope MPS509 (sighting scope).
TPX-44 must be turned on, aligned, and the an-
(3) Stopwatch.
tenna system of both equipments synchronized.
b.
Equipment Conditions.
Until directed in c below, leave IFF ANT SCAN
(1) Radar Set AN/TPN-18 turned on and
CONT switch on Electrical Equipment Cabinet
aligned.
CY-4922/TPX in IFF position.
(4) Clinometer MP3502 and Sighting Scope
installed on azimuth Antenna AS1292/TPN-8.
4-27
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