TM 11-6625-486-14&P
Table 6-13. Audio Power Output With Internal
Crystal Oscillator Test
Control Settings
Step
Test Procedure
Performance Standard
No. Test Equipment
Equipment under test
1
CN-16/U:
FUNCTION SW: CHK.
CN-16/U
Voltage control: 103
AUDIO GAIN: Fully
a. Adjust voltage control until
a. None.
ccw. TS-352B/U indicates 103V.
TS-352B/U:
FUNCTION: AC
b. Apply power to AN/USM-
b. None.
VOLTS.
159(*) and AN/USM-151(*).
Range: 250V AC.
Allow a 15-minute warmup
period.
AN/USM-151(*):
STABILITY: Fully
right.
TRIGGERING LEVEL:
Fully right.
TRIGGERING SLOPE:
+INT.
TRIGGERING MODE:
AC LF REJECT.
TIME/CM: 10 USEC.
MULTIPLIER: 1.
5X MAGNIFIER: OFF.
HORIZONTAL
DISPLAY:
MAIN SWEEP
NORMAL.
ATTN: X1.
SLOPE: +.
AMPLITUDE
CALIBRATOR: 20.
POWER: ON.
2
RANGE SW: A.
AN/USM-159(*)
TUNING: 125 kHz.
a. Adjust AUDIO GAIN
a. None.
control for comfortable sound
level.
b. Adjust CORRECTOR
b. None.
control unit sound heard in
headset is loudest beat note
obtainable. Unplug headset.
c. Turn AUDIO GAIN control
c. Minimum amplitude in-
fully clockwise and observe
peak-to-peak voltage in-
should be 1.54 volts, peak-
to-peak.
3
Same as step No. 1.
Same as step No. 1.
Disconnect TS-352B/U and
Same as
step No. 2.
CN-16/U and proceed as in
step 2.
4
Same as step No. 1.
Same as step No. 1,
Same as steps No. 1 and 2.
Same as
step No. 2.
except: TUNING: 150
kHz.
5
Same as step No. 1.
Same as step No. 1,
Same as steps No. 1, 2, and 3.
Same as
step No. 2.
except: TUNING: 200.
6
Same as step No. 1.
same as step No. 1,
Same as steps No. 1, 2, and 3.
Same as
step No. 2.
except: TUNING: 250
kHz.
7
Same as step No. 1.
Same as step No. 1,
Same as steps No. 1, 2, and 3.
Same as
step No. 2.
except: TUNING:
2,500. Range: B.
8
Same as step No. 1.
Same as step No. 7,
Same as steps No. 1, 2, and 3.
Same as
step No. 2.
except: TUNING:
2,800.
9
Same as step No. 1.
Same as step No. 7,
Same as steps No. 1, 2, and 3.
Same as
step No. 2.
except: TUNING:
3,400.
10
Same as step No. 1.
Same as step No. 7,
Same as steps No. 1, 2, and 3.
Same as
step No. 2.
except: TUNING:
3,800.