Well, I have all the crystals on frequency and still have a counter calibration error. It is less, like 1.7 khz with the pot turned all the way to the left.
the marker frequency is spot on. that leaves the counter mixer and there is a crystal frequency adjustment inside. There are no instructions on how to make the adjustment. the crystal frequency is 18.5 mhz. I can change that frequency by -3khz on one side of the pot adjustment to +1.7 khz on the high side.
So, how would we do this adjustment ? 1- turn marker on.? 2- dial in 7.2 mhz, lower side band .? 3- set cal pot to mid range.? 4- zero beat marker signal.
at this point the display should be off frequency.? ?5- with a insulated hard plastic tool, adjust tc2201 in counter mixer display to 7.2 mhz.
It worked so far, I need to check the other bands !!
