I'm stuck ... recently I have purchased a PLL-Local Oscillator module made by HARTWIG Electronics. The module has two preset LO frequencies 2.256 and 1.968 GHz to be used with a 144 or 432 MHz transceiver and the mixer module by HARTWIG. My PLL is set to 2.256GHz and I would like to switch it to 1.968 GHz. HARTWIG supplied a description how to do this but I obviously can't follow and a few attempts led to no change in LO frequency. So, could somebody walk me through the procedure?
73 de Greg DF2IC