C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Publication No. 150-041118 Page 4-21
Rev A Section 4 –Electrical Installation
Sep 2001
This input is the standard 150 Ohm carbon microphone high input. The nominal
input 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.
(w) MIC LO/PTT (Pin Z)
This input when pulled to ground, places the radio in transmit mode if the transmit
bit is set in the serial data stream. This input also forms the low side of the standard
150 Ohm carbon microphone.
(x) External PTT (Pin a)
The radio will remain in transmit mode when this input is pulled to ground.
(y) PTT Output (Pin b)
This output sinks 30ma to ground when the RT-5000 is transmitting.
(z) Switched +15 V (Pin c)
This output is capable of supplying +15 V ± 1.5 V at 500 mA.
(aa) TX SWITCHED +15V (Pin d)
When the RT-5000 is placed in transmit mode, this output supplies +15V ±2.5V at a
maximum of 100 mA.
(bb) SWITCHED +27.5V (Pin e)
This output is capable of supplying unregulated +27.5V at 500 mA.
(cc) MAIN AUDIO INHIBIT (Pin f)
When this input is pulled to ground, the main receiver audio is disabled.
(dd) EXTRA WIDE BAND AUDIO IN (Pin g)
This input is the single ended extra wide band audio input. It has a nominal
impedance between 2k Ohms and 5k Ohms and a 3 dB bandwidth of I Hz to 40
kHz. The input is adjustable from 0.1 Vrms to 1.5 Vrms and set to .6 Vrms.
(ee) WIDE BAND AUDIO IN (Pin h)
This input is the single ended wide band audio input. It has a nominal impedance
between 2k Ohms and 5k Ohms and a 3 dB bandwidth of 1 Hz to 27.5 kHz. The
input is adjustable from .1 Vrms to 1.5 Vrms and set to .6 Vrms.
(ff) GUARD AUDIO INHIBIT (Pin i)
When this input is pulled to ground, the guard receiver audio is disabled.
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