User's Manual

C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Publication No. 150-041118 Page 4-77
Rev C Section 4 –Electrical Installation
May 2006
Pin(s) - Signal Name
3, 4, 5, 9, 10, 26, 27, 28, 30, 31, 32, 34, 35, 37, 44, 49, 51, 52, 53, 55, 57 - CHANNEL
LINES
The channeling lines use BCD (Binary Coded Decimal) negative logic to control
the Transceiver channel frequency. These lines are grounded by the Control Unit
to channel the Transceiver to the selected frequency. The channel is determined
by adding the weighted value of each line. To channel a transceiver to 157.135
MHz, the following lines would be grounded:
100 MHz line
40 MHz line
10 MHz line
4 MHz line
2 MHz line
1 MHz line
0.1 MHz line
0.02 MHz line
0.01 MHz line
0.005 MHz line
157.135 MHz
Unselected channel lines should exceed +8 Vdc.
1, 6, 12, 29, 43 - TONE A, B, C, D, E
These lines are used to provide pre-programmed control of a synthesized
CTCSS encoder/decoder in the transceiver. The order of the lines follows a
binary code with E the most significant bit and A the least significant. Logic "0" is
a ground line and logic "1" must be greater than 8 volts. Refer to Section 6,
Preset Channel Programming, for information on programming tones and Table
6-2, Section 6, for available frequencies.
23 - MAIN TONE ENABLE
This line, when grounded, will activate the continuous tone controlled squelch
system (CTCSS) for either transmit tone encode or main receiver tone decode.
The tone frequency is determined by the Tone A, B, C, D, E lines.
8 - ON/OFF
This line, when grounded, will activate the 28 V system relay and provide +27.5
Vdc aircraft power to the Transceiver.
13 - MAIN RX AUDIO DISABLE
Grounding this line mutes Main Receiver audio, but does not affect sidetone or
Guard Receiver audio. The main squelch test function is disabled, yet the main
channel indicator shows channel activity.