TM 11-5840-281-35/1
Control settings
Step No. Test equipment Equipment under test
Test procedure
Performance standard
a. None.
2
As last indicated --- As last indicated --
a. On radar test set, adjust ZERO
SET control for ZERO SET in-
dication on power meter.
b. None.
b. Place function switch in INT
FM.
c. None.
c. Rotate FM AMPLITUDE con-
trol fully cw (100).
d. None.
d. Set ADD TO PWR. METER
control to 0 DB (PWR SET).
e. None.
e. Rotate OUTPUT ATTEN.
control fully cw.
f. None.
f. Adjust RF TRIMMER control
until indication is obtained on
power meter.
g. None.
g. Place function switch to CW---
h. None.
h. Adjust RF TRIMMER and
REFLECTOR controls for max
indication on power meter.
Maintain power meter indica-
tion below half-scale by adjust-
ing OUTPUT ATTEN. control
ccw.
i. None.
i. Adjust OUTPUT ATTEN.
control until power meter indi-
cates 0 dbm (PWR SET).
j. None.
j. Rotate OUTPUT ATTEN. con-
trol cursor until cursor index
mark aligns with red mark
(PWR SET) on OUTPUT
ATTEN. control dial.
k. None.
k. Alternately place function
switch to OFF and CW. Power
meter indication should be
ZERO SET in OFF, and 0
dbm (PWR SET) in CW. If
necessary, readjust ZERO SET
control (function switch placed
to OFF) and OUTPUT
ATTEN. control (function
switch placed to CW) as
required.
NOTE Radar test set calibra-
tin must be checked by perform-
ing g through k above if frequency
of radar test set is changed.
None.
3
As last indicated - As last indicated ----
Position elevation Antenna AS-
1291/TPN-8 by hand to ap-
proximately midrange of - 1 to
+10' scan.
NOTE. Where pulse cannot
be seen on oscilloscope trace,
manually rotate azimuth antenna
cw (right) until pulse is present.
a. None.
4
As last indicated - As last indicated ----
a. Establish O-vdc reference on
oscilloscope by adjusting
CHANNEL A VERTICAL
POSITION control to position
baseline on center horizontal
grid line with connector end of
CHANNEL A INPUT test
4-17
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