NCS -C250C Instruction Manual page 22

12.2 COR Option
The COR Option uses a logic level input from the radios to illuminate the Busy lights and to
operate the Repeater function. The Busy signals from the radios are on Pin 8 of the modular
Radio connectors. Signal levels from the radios are:
Low: < 1.0 VDC
High: > 1.5 VDC
The sense of the Radios' Busy signals can be individually selected using the jumper block
shown below. Absence of a jumper means that a "Low" signal indicates "Busy". The presence
of a shunt on the jumper block means that a "High" signal indicates "Busy".
Add Jumper for "High" Busy signal.
Do Not Add Jumper for "Low" Busy signal.
RAD1-RAD4 Modular Radio Connector. Pin 8 is the COR Signal Line.
NOTE: With the COR Option installed, VOX operation of the Busy Lights and Repeater Function is
disabled. Receive input levels should be set using audio voltage measurements to 200mVp-p -
300mVp-p for each radio.
NCS-C250C Instruction Manual Rev J Copyright © 2004-2010 New Communications Solutions, LLC
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