This hamradio kit allows your SDR and Transceiver to simultaneously use the same antenna, with PTT from the Transceiver (TRX) used as a control signal
The main purpose of this Kit is to allow 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.
The Kit also 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.
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).