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Appendix C: EXPENDABLE SUPPLIES AND MATERIALS LIST
Up
TM-11-5805-387-20-2 Modem Radion Teletypewriter MD-522A/RC (NSN
Next
TM 11-5805-387-20-2
audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frequencies that are heard.
auxiliary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Any item not directly a part of a specific
component or system but required for its
functional operation.
chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The metal framework on which the parts of
the modem are mounted.
coarse tune . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . To tune the signal within a "ballpark" range
for fine tuning.
demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A device used to convert audio tones into dc
mark and space pulses.
dc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electric current (waves) that flows in only
one direction and remains essentially
constant in magnitude.
intensity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A term used to designate brightness or
luminance of the spot.
modulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A device used to convert direct current (dc)
mark and space pulses into audio tones.
polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Having two opposite charges - one positive,
one negative.
pony loop circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . Allows teletypewriter order wire transmission
and reception over landlines from a remote
station when system is not operating in the
duplex mode.
remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control indirectly or from a distance.
single channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Use of one frequency for transmission and
reception.
stabilize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . To hold steady.
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