Not in cases where the preamp and/or attenuator is used on some bands and not for others - unless SMTR ABS is set to ON. 73, Don W3FPR On 9/9/2014 3:10 PM, ab2tc wrote: > Hi, > > Wouldn't a receiver gain calibration procedure take care of the band to band > variation? > > AB2TC - Knut > > >