TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
PWR SET in CW. If neces-
sary, readjust ZERO SET
control (function switch placed
to OFF) and OUTPUT
ATTEN. control (function
switch placed to CW) as re-
quired.
NOTE Radar test set callibra-
tion must be checked by perform-
ing g through k above if frequency
of radar test set is changed.
a. None.
4 As last indicated, except: As last
a. On radar test et, adjust RF
indicated------
TUNING control for max pulse
Radar test set
amplitude on oscilloscope.
Rf power switch: POWER
Maintain amplitude of pulse
SET
below limiting level by adjust-
Function switch: PULSE-
ing OUTPUT ATTEN. control
EXT SYNC
on radar test set.
b. None.
PULSE DELAY: As
b. Adjust PULSE DELAY control
required
for optimum pulse presentation
on oscilloscope.
Sum of indication on
5
As last indicated- As last indicated --
On radar test set, rotate OUTPUT
OUTPUT ATTEN. con-
ATTEN. control ccw until pulse
trol dial on radar test
on oscilloscope is barely dis-
et, dbm value stamped
cernible in noise on oscilloscope.
on azimuth directional
Rotate PULSE DELAY con-
coupler, and dbm value
trol on radar test set back and
on coaxial cable between
forth to identify pulse at lower
azimuth directional
amplitudes. Record OUTPUT
coupler and RF POWER
ATTEN. control dial setting in
connector on radar test
dbm.
should be -101 dbm or
greater.
6 --------------------- -------------------------------
None.
Disconnect oscilloscope and radar
test set.
NOTE. Do not replace covers
Radar Receiver-Transmitter
RT-818/TPN-18 until tests are
completed.
4-9. Testing FTC and Transmitter
(3) Tee Adapter UG-274/U (bnc coaxial).
Narrow Pulse
b. Equipment Conditions.
(1) Radar Set AN/RPN-18 turned on,
a. Test Equipment Required.
aligned, and tuned.
(1) Radar Test Set AN/UPM-6 (radar test
(2) Front and rear covers removed from
set).
Radar Receiver-Transmitter RT-818/TPN-18.
(2) Oscilloscope AN/USM-140B (oscillo-
scope).
c. Procedure.
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
Oscilloscope
Radar Receiver-
a. None.
a. Connect oscilloscope CHAN-
1
NEL A INPUT test prod to
Transmitter RT-818/
POWER: ON
DET VIDEO testpoint TP301
CHANNEL A VERTI- TPN-18 control
on Intermediate Frequency
panel
Amplifier AM-3339/TPN-8.
CAL POSITION: Mid-
SCAN: OFF
position
HV: OFF
4-12
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