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| What is good spectrum analyser Agilent ESA E4403B or Agilent CSA N1996A ? |
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| zrq:
These days you may consider these retired 3.6G N9020As coming from China. I heard some might be dodgy but some are simply of excellent value. Some have the flexnet license manager cracked so comes with all possible software options. If I'm still in China I'll certainly get one, the resellers on ebay are asking much more than the Xianyu price even considering shipping (althogh still way less than westen sellers). |
| pdenisowski:
--- Quote from: Cooperhop on May 05, 2024, 11:03:56 am ---How important is to have faster refresh rate when it comes to spectrum analyzers ? --- End quote --- Are you referring to sweep time? That's basically a function of span and resolution bandwidth, both of which are user configurable. As a practical (and somewhat oversimplified) matter: sweep time is important when you're measuring something that changes during the time it takes to make a sweep :) If you're measuring the passband of a filter, etc. then it's mostly a function of your patience. Given that the "interesting" part of most filters is the upper and/or lower edges and attenuation in and out of the pass band, you don't need a terribly small RBW to get acceptable results measuring them* (*unless you care about things like "ripple" in the passband, etc.) The same could also be said for an amplifier that's being measured with a CW input, in which case the output signal is (or should be) constant and relatively narrow in spectrum. The biggest reason to reduce RBW in both cases would be to lower the noise floor (DANL). Yes, different spec ans will have different sweep times even given the same RBW and span, but for the tests you are describing I don't think the difference is terribly important. |
| Electro Fan:
What is the highest frequency you will be working with and how much bandwidth do you need to see at one time? |
| usagi:
i do have a used SA buyer's guide: https://www.eevblog.com/forum/testgear/used-spectrum-analyzer-buyer_s-guide/ |
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