User's Manual

C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Publication No. 150-041118 Page 4-33
Rev C Section 4 –Electrical Installation
May 2006
Pin - Signal Name
L – RS-422 CTRL RX LO
This input is the active low sense serial data input and meets EIA RS-485 voltage
levels. The data from this input comes from the C-5000.
M – RS-422 CTRL RX HI
This input is the active high sense serial data input and meets EIA RS-485
voltage levels. The data from this input comes from the C-5000.
N - DATA SHIELD GND
Spare ground.
P - MAIN SQUELCH ANNUN
This output sinks 30 mA to ground when the main receiver signal-to-noise
squelch conditions are met.
R - GUARD SQUELCH ANNUN
This output sinks 30 mA to ground when the guard receiver signal-to-noise
squelch conditions are met.
S – AM/FM MODE INDICATOR
This output sinks 30mA to ground when the RT-5000 is in AM mode.
T – VHF/UHF MODE INDICATOR
This output sinks 30mA to ground when the RT-5000 is tuned to a frequency that
is less than 400 MHz.
U – VHF_LO MODE INDICATOR
This output sinks 30mA to ground when the active frequency is less than 88
MHz.
V - ATTENUATOR CONTROL
When this input is pulled to ground, the RT-5000 will engage a 10 dB receive
attenuator in both main and crystal synthesized guard receivers.
W - ON/OFF
When this input is pulled to ground by the C-5000, power is applied to the RT-
5000.