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PREFERRED AND ALTERNATE METHOD OF TUNING
Up
TM-11-5805-387-10-2 Modem Radio Teletypewriter MD-522A/GRC (NSN
Next
DUPLEX OPERATION
TM 11-5805-387-10-2
Adjust SCOPE INTENSITY control to
obtain adequate display.
b. ALTERNATE METHOD
COARSE TUNE the signal as follows:
Set METER FUNCTION at
DISCRIMINATOR.
Tell sending station to send a series of teletypewriter test signals using
the following R-Y codes.
(1) R-Y.
(2) The quick brown fox jumped
over the lazy dog's back.
(3) Now is the time for all good
men to come to the aid of
their country.
Watch the modem meter. It will
indicate signal strength of mark
and space pulses.
Tune the receiver and modem BFO (850-Hz mode only) until the
q
meter registers in the DISCRIMINATOR scale during the entire
message. (Tune so that the indicator needle swings the maximum
range within the discriminator section of the meter. )
Set METER FUNCTION to DC LOOP NO. 1
q

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