I using IC-7300 with Omnirig, varAC v 502.
When I change the band toe TRX change it, but is going directly to the band before.
My impression: varAC send the new frequency, read directly the current frequency (which is not already changed) and send again - but the old frequency.
So the TRX is changing for some milli-secounds the band and is going back.
Think if there would be after sending the new frequency to make a pause (think a half secound will be enough) before reading again.
Sometimes the change works, sometime not.
The problem is only given by band change. Not by frequency-slot change (n*750 Hz).
Afterwards... Just seen this is happened if I do a CQ-Call, wait 2-3 minutes for answer (watchdoc is still running) and want to change the band. Means not a timer issue...
73 de Roland DK4RH