All of Bosch's long-range RF transmitters have an output impedance of 50 ohms. The C471R receiver's input impedance is also 50 ohms.This means you must use 50-ohm coaxial antenna cable and connectors. Also, any test equipment that you use during system set-up (for example, watt meters, frequency counters, service monitors) must be rated for 50 ohms.
