MSG: Cannot change antenna while transmitting?

Steve G1XOW

Hi Flexers,

F6300 with v1.51 SSDR, DDutil

Yesterday I saw a very odd message that has never appeared before.

I think it was from either SSDR or CAT. The message read "Cannot change antenna while transmitting". Clearly not something you should ever do, but I wasn't trying to change antenna!

I was working negative split on 40m ssb, the DX was on 7.136 and I was transmitting on about 7.128.  Everything appeared to work normally and the QSO went through.

I then carried on working on 40m, but now simplex (same power same antenna), and only 50kHz from the previous QSO but with now no message showing.

Just to double-check I then reconfigured for the same split QSO again, and you guessed it...the message came straight back.

So, a bug/problem to do with negative splits maybe?  I should say I'm an obsessive DX chaser and have therefore worked hundreds of split QSO with this setup, but never once seen this message.

Any ideas please?

73 de Steve G1XOW

Steve G1XOW

See pic.

...just to add a bit more info. This is only a problem when TX is the B VFO. If I switch to RX on B and TX on A it is fine...go figure!  

ps. ANT1 is selected for both VFOs for both the TX and RX antenna selection.

73 de Steve G1XOW

Ian1

Steve

What version of DDutil are you using I had to go back to 3.2.100 my SPE 1KA wouldn't work with latest release.

Ian

Tim - W4TME

This is a transmit interlock message where the radio received a request to change antennas while transmitting.  Disconnect DDUtil and see if the issue remains as it could be the device requesting  to change antennas.