Section III. OPERATION UNDER USUAL CONDITIONS

TM 11-5805-387-10-2

Section III. OPERATION UNDER USUAL CONDITIONS

2-6. TYPES OF OPERATION

The modem is always used as part of a communication system.

Type of operation is controlled by the system installation used.

The modem can be used for local or remote operation.

One-way reversible or duplex types of operation can be performed

to transmit and/or receive the following signals:

fsk (850 Hz)

fsk (85 Hz)

voice only

nsk diversity (85 Hz diversity)

nsk plus voice (85 Hz + voice)

ONE-WAY REVERSIBLE: use to receive or transmit.

DUPLEX: use to receive and transmit at the same time.

PONY CIRCUIT: use to receive or transmit between local and remote.

2-7. PREPARATION FOR USE

Pull down hinged cover at the top left side of the modem front panel,

to locate additional controls and switches needed to operate the modem.