GLOSSARY

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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