GAI-Tronics ICP9000 Navigator Series Console Installation and Service Manual - Manual (Page 16)

Description ICP9000 Navigator Installation and Service Manual
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DC Remote Control
DC control is a method of remote radio control. This scheme uses dc currents of differing magnitudes
and polarities to command the radio to perform various tasks. The dc control currents are directly
impressed upon the audio wire line connections between the console and base stations.
E&M Remote Control
E&M remote control is another scheme of remote radio control. This scheme uses two pair of leads to
control communication between the console and base station. The console uses the “M” leads to signal
the base station when to transmit, and uses the “E” leads to detect when to receive.