Muting one K3 while other is transmitting

[dl1mgb]

Hi,

I have two K3s running equally on one band in SSB. If transceiver A transmits, transceiver B should be muted to protect the RX of transceiver B.

When in SSB and a microphone connected and just pressing the PTT, you also send with transceiver B.

I haven't found anything in the manual how to do this.

Hope there is help out there.

Many thanks.

73s Chris DL1MGB