How does the Comant CI 601 Duplexer operate?
The CI 601 is designed to provide operation between two transceivers (118-137MHz) and one antenna. In the de-energized mode, the duplexer acts as a 3 dB coupler with the output ports isolated by 20 dB. The unit has white, green, red and black leads. Red is for 12-30 vdc power, while black is for ground. The white and green leads are connected to corresponding transmit 1 and transmit 2 so that control voltage, actuated by the microphone circuit, switches the antenna from transmit 1 or transmit 2. The unit isolates the transceivers by 30dB when in operation.
