TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
NOTE
Do not key transmitter when set to WWV
(2)
Mode selector - USB.
(3)
Listen to the time tick, tone, or voice
announcements. The tone is preferable.
*8
ADF radio set - Check as follows:
K20-27
a.
Mode selector switch - ANT. Tuning meter and
frequency indicator should be illuminated Allow
sufficient time for warm-up.
b.
Range switch - Set to 190 to 400 kHz range.
c.
Tune control - Tune in a station and peak the tuning
meter.
d.
Frequency dial - Note reading under hairline.
e.
BFO switch - BFO.
f.
Tune control - Adjust for zero beat. The frequency dial
should read the same as in step d.
g.
BFO switch - OFF.
h.
Tune in a low frequency station on each of the other
bands (400 to 850 and 850 to 1750 kHz) to insure that
band switching is taking place.
4-27
