Re: HP 8350B sweeper behavior
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Martin,
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if the trace is still noisy, whether or not you activate the CW filter on your 83522A, the circuit involved in this filter is very simple: on the A6 module, it is a U22 driver, a K1 relay and a capacitor C14, 330uF 40V. Regards Yves -----Message d'origine-----
De?: yves_tardif@... <yves_tardif@...> Envoy¨¦?: 19 novembre 2023 20:18 ??: '[email protected]' <[email protected]> Objet?: RE: [HP-Agilent-Keysight-equipment] HP 8350B sweeper behavior Martin, I'm back... My 8350B, on which I was testing, suddenly broke down, when it was turned back on, it was working 30 seconds earlier...what a coincidence! But, it wasn't too complicated: a capacitor shorted on the +5V power supply on the processor board. By removing the PCBs one by one, I was able to quickly locate the source of the problem. As for the noise on the 1GHz signal, my Spectrum probably has more flexibility, I adjusted the parameters to have exactly yours, based on the image you sent earlier today. Apart from the selectivity of the 10kHz resBW filter which is a little different, I would say that the noise floor is approximately the same as well as the amplitude, the signal shown on your Spectrum shows relatively a lot of noise. However, by default the CW filter should be activated on your plug-in, if this is not the case, do it and compare the result with the image (with/without CW filter). If the image looks like the one on the right with the CW filter ON, then there is no problem. If the CW filter was enabled when you created an image of your Spectrum, then there is a problem...but if so I think it will be quite simple to fix. Do the test and tell me the result, I will tell you which circuit is involved in this process. -----Message d'origine----- De?: [email protected] <[email protected]> De la part de Martin via groups.io Envoy¨¦?: 19 novembre 2023 13:39 ??: [email protected] Objet?: Re: [HP-Agilent-Keysight-equipment] HP 8350B sweeper behavior On 19 Nov 2023, at 18:50, Jeff Kruth via groups.io <kmec@...> wrote: What is interesting to me is the expectation of greater accuracy than waspossible... I'm probably spoiled by these synthesised generators. When I was at school, many years ago, I build a generator myself. Certainly horrible performance, but I did not have any tools to measure that. Now I have the tools, so... But what about the noisy SA trace of the 83522A, compared to Yves's trace or the one from the older module? cheers Martin |
