开云体育

I have a working 4193A with probe. I went through (nearly) all adjustments, but gut stuck on the ALC Ref Voltage Adjustment (A13) and the IF BPF Gain/Phase Adjustment (A12). Both adjustments call for a special Adjustment Board 04193-66564. I was not able to find any information on that extender board that obviously has switch on it. I would appreciate any information on that board. While all adjustments performed so far were right on the money, I really would like to get everything set up correctly.

?

Thanks, Herbert