How close does the high side of the IF (3.955 mc) need to be? It seems I can't get a true fix on 3.955, but I can on 3.9485. To me, this is a lot, but I may be nit picking. The IF's align fine to the 3.9485, but the modulated carrier is barely audible at 3.955 no matter what I turn or adjust. Thanks, Rick