TM 11-6625-486-14&P
Control Settings
Step
Test Procedure
Performance Standard
No. Test Equipment
Equipment under test
1
AN/USM-151(*)
FUNCTION: OPER.
a. Turn on the equipment and
a. None.
MODE: A ONLY.
AUDIO GAIN: Fully
let it warmup for 30 minutes.
VOLTS/CM: 1.
clockwise.
CN-16/U
POLARITY: NORMAL. RANGE SW: A.
b. Adjust voltage adjust to 103
b. None.
TRIGGERING MODE: TUNING: 125 kHz.
volts as read on TS-352B/U.
AC.
TRIGGERING SLOPE:
+ INT.
5X MAGNIFIER: OFF.
HORIZONTAL
DISPLAY: MAIN
SWEEP NORMAL.
ATTEN: X1.
SLOPE: +.
AMPLITUDE
CALIBRATOR: 5.
c. Connect CALIBRATE OUT
c. None.
AN/URM-25F:
Frequency 125 kHz.
to CHANNEL A INPUT on
FREQUENCY BAND
AN/USM-151 and adjust
SWITCH: C.
FOCUS, BRILLIANCE,
ASTIGMATISM,
HORIZONTAL CEN-
TERING, and VERTICAL
CENTERING controls for
clear, sharp, and properly
centered square wave on
oscilloscope. Calibrate
oscilloscope to indicate 5
volts peak-to-peak.
Disconnect lead from
CALIBRATE OUT con-
nector.
AN/USM-151(*)
d. Connect CHANNEL A
d. None.
INPUT to 600-ohm dummy
load, and plug dummy load
into one of AN/USM-159(*)
PHONES jack.
AN/URM-25F
e. Connect output to
e. None.
AN/USM-159(*) ANT. jack.
Adjust AN/URM-26F
MULTIPLIER AND
MICROVOLTS controls to
obtain 0.1-volt output as
measured on output meter.
f. Adjust AN/USM-159 (*)
f. AN/USM-161(*) indicates
CORRECTOR control to
2.16 volts peak-to-peak (1
obtain maximum amplitude
mw).
on AN/USM-151(*)
oscilloscope.
2
Same as step No. 1,
Same as step No. 1
Adjust AN/USM-159(*)
AN/USM-151(*) oscilloscope
except:
CORRECTOR control for
indicates 0.486 peak-to-
AN/URM-25F:
maximum amplitude of
peak.
Frequency: 1.00 MHz.
display on AN/USM-151(*)
FREQUENCY BAND
oscilloscope.
SWITCH: E.
3
Same as step No. 1,
Same as step No. 1,
Same as step No. 2.
Same as step No. 1.
except:
except: TUNING: 190
AN/URM-25F:
kHz.
FREQUENCY BAND
SWITCH: C.
Frequency: 190 kHz.
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