This cable connects to the EXT CTRLÂ jack on the SunSDR2 PRO or SunSDR2 QRP and to the Xiegu XPA125B amplifier.
The PTT output is fitted with a CPC1035N optocoupler that separates the SunSDR2 PRO or QRP from the XPA125B for added protection against physical damage and RFI.
Remember to activate the “AMP” button in ExpertSDR2 to activate PPT output.