Re: HP 8554B, no RF after first successful run...
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Some things I've found while working through the front panel controls section of the manual:? Scan Width - #6 "turn scan width per div to 10mhz", result "LO Feedthrough, 30mhz signal, 2nd harmonic".? ?I do not see these, any of them, just continued noise floor.?? The rest of the steps seem relatively meaningless but one call-out I'd make, Step 12 "Reduce Bandwidth?+ Scan time", result "should be stable and viewable"...? ? I wouldn't quite call it stable while turning the knob, between the detent I see seemingly random spikes on the screen, until the next detent.? ?might be some sort of switching noise or crosstalk though.?? I do not see a 30mhz calibrator signal, I've never tried to verify this until last night either.? ?I'll begin to read up on this and Scan width circuitry next..?? On Fri, Sep 20, 2024 at 10:46?AM Bill Berzinskas via <bberzinskas=[email protected]> wrote: |