BG7RHK
It consists of a box, antenna connection, and a 1:2 splitter. One end connects to the radio's direct output, while the other end outputs to an RSP SDR.
This 1.2-inch box can be linked with the radio's PTT (Push-to-Talk) action during transmission, automatically cutting off the signal output to one end of the RSP when the PTT is pressed, thus preventing the external RSP from being damaged by the radio's transmitted RF signals.
Specifically, you can search for videos by BG4IGX on Bilibili (B站). I use the SDR antenna switch that he created.
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