[Flexradio] Filter width "problem"

[Ross]

I have just experienced an unusual problem. Whenever I try to transmit, the filter display on the screen  jumps to show approx. 2600hz wide. (it may be a bit wider) This happens at any setting of filter width, 6khz down to minimum. When I stop transmitting it goes back to the correct initial setting such as set in Var 1. This hasn't happened before and what would cause this. Advice please.   Best wishes Ross   psI I second the comment about muting. The SDR1000 is very good on receive, and i also would like to use it as a second receiver, attached to a separate aerial, while transmitting on my main beam.