C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Publication No. 150-041118 Page 4-37
Rev A Section 4 –Electrical Installation
Sep 2001
E. C-5000 Transceiver Interface FLEXCOMM Transceivers, RT-30, RT-118, RT-138,
RT-138F, RT-406F and RT-450
(1)
Figure 4-11.
(2)
Table 4-5.
(3) CHANNEL LINES (Pins 3, 4, 5, 9, 10, 26, 27, 28, 30, 31, 32, 34, 35, 37, 44, 49, 51,
52, 53, 55, 57)
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
4MHz line
2MHz line
1MHz 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.
(4) TONE A, B, C, D, E (Pins 1, 6, 12, 29, 43)
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.
(5) MAIN TONE ENABLE (Pin 23)
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.
(6) ON/OFF (Pin 8)
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