MIL-C-48605A (AR)
i. Adjust PHASE CONTROL for maximum signal indication on
SIGNAL CHANNEL meter.
Set TARGET, TARGET FREEZE, and CLUTTER switches to
OFF
j.
position.
k.
Set CLUTTER LEVEL
to 70.
l. Set CLUTTER switch to ON position.
m. With FUNCTION SELECT switch in RF MONITOR position,
adjust the RF LEVEL control and maintain digital display (DVM)
± 0.025 Vdc for the remainder of this procedure.
indication of
n. Adjust CLUTTER LEVEL control until LOCK ON indicator is
illuminated. Note CLUTTER LEVEL dial number.
o. Increase (higher number on dial) CLUTTER LEVEL control
setting by 10.0.
p. LOCK ON indicator should not be illuminated after an
approximate 3 second delay.
q. Repeat steps n through p, above, until repeatability
occurs in step n within 1.0 dB.
r. Record CLUTTER LEVEL dial reading (step n). This is the
clutter power.
s. Determine SCV of the radar set by the following
calculation:
SCV = MDS (4.7.3.17.2f) - Clutter Power (4.7.3.17.4r)
4.7.3.17.5 AGC threshold and linearity measurement.
a.
Disconnect TPS short from J6 of Radar Receiver Unit 3.
b. With FUNCTION SELECT switch in RF MONITOR position,
adjust RF LEVEL control and maintain digital display (DVM)
indication of +2.500 ± 0.025 Vdc for the remainder of this procedure.
c. Set CLUTTER switch to ON position. Decrease CLUTTER
LEVEL control setting slowly to 5 while observing LOCK ON Indicator.
LOCK ON indicator shall not illuminate.
d.
Set CLUTTER switch to OFF position.
e.
Set TARGET switch to ON position.
f. Adjust TARGET LEVEL to MDS (4.7.3.17.2f) LOCK ON
indicator shall illuminate.
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