This ham radio kit allows your SDR and Transceiver to share the same antenna. It also does switching between SDR and Transceiver audio with an adjustable delay.
The Kit manages the audio paths. During transmission the TRX audio is always selected, thus avoiding the effects of the audio delay from the SDR. During reception the user has the option to switch between TRX and SDR audio. The delay, with which the SDR audio is switched back, after the transmitting stops, can be regulated. This is important, since this delay depends on the specific SDR software and hardware being used.
The Kit allows your Transceiver (TRX) and Software Define Radio (SDR) to use the same antenna. During receiving both the SDR and the TRX are connected to the common antenna. When the TRX starts transmitting the SDR is disconnected and grounded.
For other possible use cases please check the technical documentation page.
* A standard “TX transmits” output from the TRX is used as a control signal. This signal has different names from transceiver manufacturers: SEND; TX-GND; T/R-LINE; Ground-on-Transmit. Further on we will refer to it as TRX PTT. This signal can be used also by other equipment connected to the TRX e.g. power amplifier (PA).