TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
prod disconnected from oscillo-
scope. Reconnect connector to
CHANNEL A INPUT.
b. +1.5 vdc (nominal).
b. Measure de level of baseline (at
IAGC PULSE testpoint
TP8602) on oscilloscope by
comparing vertical position of
baseline to center grid line.
a. None.
a. On Master Control-Indicator
5 As last indicated, except: As last
C-6988/TPN-18, place
indicated
TRANSMITTER switch to
Radar test set
WIDE (but not through WIDE
Rf power switch:
to HV ON).
POWER SET
b. None.
b. On radar test set, adjust RF
Function switch:
TUNING control for max pulse
PULSE-EXT SYNC
amplitude on oscilloscope.
PULSE DELAY: As
Maintain amplitude of pulse
required
below limiting level by adjust-
PULSE LENGTH: 10
ing OUTPUT ATTEN. control
(sec)
on radar test set.
Oscilloscope
c. None.
c. Adjust PULSE DELAY control
CHANNEL A SENSITIV-
until pulse is approximately
ITY (VOLTS/CM): 0.05
centered on oscilloscope.
d. None.
d. On Intermediate Frequency
Amplifier AM-88M8/TPN-8,
connect short jumper wire be-
tween chassis ground and DET
LOG VIDEO testpoint TP8601.
a. None.
a. On Intermediate Frequency
Amplifier AM-3388/TPN-8,
6 As last indicated -- As last indicated ----
disconnect oscilloscope CHAN-
NEL A INPUT test prod from
IAGC PULSE testpoint
TP3602 and connect to DET 7
testpoint TP8609.
b. None.
b. On radar test set, adjust OUT-
PUT ATTEN. control for
pulse amplitude of 0.05v peak
as indicated on oscilloscope.
c. Dbm setting on OUT-
c. Record OUTPUT ATTEN.
PUT ATTEN. control
control dial dbm setting.
dial.
d. None.
d. On Intermediate Frequency
Amplifier AM-SS38/TPN-8,
disconnect oscilloscope CHAN-
NEL A INPUT test prod from
DET 7 testpoint TPS609 and
connect to DET 6 testpoint
TP3808.
e. None.
e. On radar test set, adjust OUT-
PUT ATTEN. control for pulse
amplitude of 0.05v peak as
indicated on oscilloscope.
f. Record OUTPUT ATTEN.
f. Dbm setting on OUT-
control dial dbm setting.
PUT ATTEN. control
dial.
g. 12 db max, 8 db min
g. Compute stage gain in db of
stage gain.
i-f stage by subtracting dbm
setting recorded in f above
from dbm setting recorded in
c above.
4-18
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