C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Publication No. 150-041118 Page 4-15
Rev A Section 4 –Electrical Installation
Sep 2001
(16) Spare (Pin 15)
(17) Plain/Cipher (Pin 16)
30 mA to ground is standard; open is cipher.
(18) Take Control (Pin 17)
Grounding tri-states RS-422 TX lines.
(19) EXT XMT Audio (Pin 18)
This output is the single ended extra wide band audio output. It has a nominal impedance
between 2k Ohms and 5k Ohms and a 3 dB bandwidth of 1 Hz to 40 kHz. The output is
adjustable from 0.1 Vrms to 1.5 Vrms and set to .6 Vrms.
(20) Ground (Pin 19)
Ground.
(21) Control Ground (Pin 20)
Ground connection to R/T.
(22) UNSQL GD RCV AUDIO (Pin 21)
Unsquelched guard receive audio input.
(23) Spare (Pin 22)
(24) Reserved Out Spare B (Pin 25)
(25) Voice Audio LO (Pin 26)
This is the low side differential audio input. It can drive a 150 Ohm load to 100 mW and a
600 Ohm load to 25 mW. 3 dB bandwidth is 300 Hz to 3 kHz.
(26) Reserved Out Spare A (Pin 27)
Spare output A.
(27) Shield (Pin 29)
Audio output shield ground connection.
(28) Mic HI (Pin 30)
This output is the standard 150 Ohm carbon microphone high output. The nominal output
is .25 Vrms and is adjustable over a range of .125 Vrms to 1.5 Vrms. The 3 dB bandwidth
is 100 Hz to 8.7 kHz for raw audio and 300 Hz to 3 kHz for processed audio per EIA
specifications. Unsquelched main receive audio input.
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