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| Rigol DG1022Z or Siglent sdg1032x |
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| mawyatt:
Personally we would never consider a modern DSO or AWG that's not directly compatible for Bode Plot capability. Folks that downplay Bode Plots usefulness haven't spent the time with this built-in feature, and I count myself in that category a couple years ago!! Before we acquired a SDS2102X+ (later a 2104X+) a FRA was employed for Bode Plots if available, usually not, or just the old hat input sweep, scope record, and then plot results which required having to convert in dB and getting the phase....real PITA!! Even recall using a Tek scope as a high Z input preamplifier as an input to a 50 ohm HP NA as a make shift FRA. Lots of work and such which now can be accomplished in just the DSO and no additional efforts other than a few setup parameters, and produces decent Dynamic Range (with input scaling) with nice graphics (will be interesting to see how well the new SDS2000X HD performs in Bode Mode)!! And for icing on the cake with a couple $ spent on an DIY Isolation Transformer, one can even do very respectable Closed Loop measurements!! From an old retired analog guy I must say that these modern modest priced DSOs are amazing, not only doing anything and everything the old analog scopes could do, and generally even better, and incorporating a Logic Analyzer, very useful FFT feature, Bode Plots, waveform stats, remote access and on and on :-+ So why would one consider an AWG that's not compatible with the DSO, is there a big price difference, or feature difference, or performance difference that's compelling enough to forgo the DSO compatibility? Best, |
| Martin72:
--- Quote ---will be interesting to see how well the new SDS2000X HD performs in Bode Mode --- End quote --- Hmmm, could be one of the tasks when I got mine... 8) |
| mawyatt:
--- Quote from: Martin72 on June 12, 2022, 09:08:41 pm --- --- Quote ---will be interesting to see how well the new SDS2000X HD performs in Bode Mode --- End quote --- Hmmm, could be one of the tasks when I got mine... 8) --- End quote --- Was hoping some kind folks with these new HD models might pick up on the hint :-+ Envision the Bode Plot dynamic range will be quite good with the extra ADC bits and the low noise floor. What rf-loop has shown with the Two Tone IMD tests reenforces the wide DR expectations. Best, |
| bd139:
--- Quote from: mawyatt on June 12, 2022, 09:01:15 pm ---Personally we would never consider a modern DSO or AWG that's not directly compatible for Bode Plot capability. Folks that downplay Bode Plots usefulness haven't spent the time with this built-in feature, and I count myself in that category a couple years ago!! Before we acquired a SDS2102X+ (later a 2104X+) a FRA was employed for Bode Plots if available, usually not, or just the old hat input sweep, scope record, and then plot results which required having to convert in dB and getting the phase....real PITA!! Even recall using a Tek scope as a high Z input preamplifier as an input to a 50 ohm HP NA as a make shift FRA. Lots of work and such which now can be accomplished in just the DSO and no additional efforts other than a few setup parameters, and produces decent Dynamic Range (with input scaling) with nice graphics (will be interesting to see how well the new SDS2000X HD performs in Bode Mode)!! And for icing on the cake with a couple $ spent on an DIY Isolation Transformer, one can even do very respectable Closed Loop measurements!! From an old retired analog guy I must say that these modern modest priced DSOs are amazing, not only doing anything and everything the old analog scopes could do, and generally even better, and incorporating a Logic Analyzer, very useful FFT feature, Bode Plots, waveform stats, remote access and on and on :-+ So why would one consider an AWG that's not compatible with the DSO, is there a big price difference, or feature difference, or performance difference that's compelling enough to forgo the DSO compatibility? Best, --- End quote --- You can do a bode plot on any 4 channel scope and any 1 channel AWG. The whole thing is just software and the devices have SCPI / LXI interfaces. |
| 2N3055:
--- Quote from: bd139 on June 12, 2022, 07:53:36 pm ---That is indeed neat :) You can have some fun with even older equipment… log-log plot on a TDS210. Point is it is neat indeed but it depends on the application. 90% of what is bought is unused. --- End quote --- As I said it depends of what you do. You can improvise all kinds of contraptions, up to creating your own analyzer. What you show is just a gain plot, without obvious frequency axis, and no phase information. It is useful to a point but far from what FRA gives you... But the point here is that you can have that (very powerful) tool for basically free if you chose one generator over the other. Or loose it if you chose other AWG from other manufacturer for whatever reason. |
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