GLOSSARY

TM 11-5815-238-20

GLOSSARY

ALTERNATING CURRENT (AC). Electrical current that is continually changing in magnitude and periodically reverting

in polarity.

DIRECT CURRENT (DC). Electric current (waves) that flows in only one direction and remains essentially constant in

AMPERE. Basic unit of electrical current flow.

MILLIAMPERE (MA). A measure for a small amount of electrical current.

MICROAMPERE (UA). One-millionth of an ampere.

BIAS. To influence or dipose in one direction.

BIAS METER. Measures the amount of marking or spacing bias teletype signals.

CURRENT. Flow of electric charge or rate of such flow.

FULL DUPLEX. Process of transmitting and receiving information at the same time.

HALF-DUPLEX. Permits operation in either direction but not at same time.

FUSE. To open a circuit when excessive current exists in a circuit.

RECEIVE. To receive a signal or message.

TRANSMIT. To send a signal or message.

TRANSMITTER-DISTRIBUTOR. Translates code perforations in paper tape into electrical impulses and sends them to

receiver units.

VOLTAGE. Electromotive force measured in volts.

NOTE

For more terms, see TM 11-5815-238-10.

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