> Yes, on base of this comment I figured it out, I just did not
> first understand that you have
> to turn off the device to get this working. Thanks for the help!

You'r welcome. I suppose the only solution would be to try another CEM3382
which is used in the internal quadrature VCO. But the CEM3382 is very hard
to find and even expensive (that's why we discontinued the A-126).

One last question: which power supply do you use (A-100PSU2 or another type)


Best wishes
Dieter Doepfer