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| Another radio amateur about to buy a DSO ... |
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| Performa01:
--- Quote from: Mike99 on November 12, 2023, 01:13:22 pm ---That's very interesting, thank you. It's nudging me towards the 2202X-E which has a selectable 50 ohm input. --- End quote --- It would be a sensible choice especially for a radio amateur. While the SDS1202X-E really is the bottom of the barrel instrument in the modern Siglent lineup (and has less features than the SDS1004X-E), the SDS2000X-E series gives you not only higher sample rate and bandwidth together with the 50 ohm inputs required for that, but also more software features like Search and Bode Plot. The latter should be interesting especialy for a ham, since it works with any Siglent AWG and offers up to three channels up to 120 MHz at a high dynamic range >100 dB. So you can not only characterize your newly designed three-way crossover network for your loudspeaker in one go, but also all sorts of (IF) filters. Yes a VNA is faster, but the Bode Plot can be used down to 10 Hz at high accuracy. EDIT: Yeah, for three channels we need a four channel scope, so the SDS2000X-E is limited to just one channel... |
| ebastler:
--- Quote from: Performa01 on November 12, 2023, 03:38:20 pm ---Bode Plot [...] should be interesting especialy for a ham, since it works with any Siglent AWG and offers up to three channels up to 120 MHz at a high dynamic range >100 dB. So you can not only characterize your newly designed three-way crossover network for your loudspeaker in one go, but also all sorts of (IF) filters. Yes a VNA is faster, but the Bode Plot can be used down to 10 Hz at high accuracy. --- End quote --- But the three-channel plots would only work with a four-channel scope, right? The SDS2000X-E series only comprises dual-channel models, of which one would be used for the input and one for the (single) output of the DUT, in my understanding. |
| Mike99:
The deed is done. I bought the Siglent SDS2202X-E and they gave me a discount :) Here is the input VSWR measured on an FA-VA5 VNA (because my NanoVNA has a couple of inband spurious signals). Mike |
| bdunham7:
--- Quote from: Mike99 on November 14, 2023, 02:54:43 pm ---Here is the input VSWR measured on an FA-VA5 VNA (because my NanoVNA has a couple of inband spurious signals). --- End quote --- Are you using the basic calibration elements that came with the FA-VA5 or the better ones that they sell separately? |
| Mike99:
--- Quote from: bdunham7 on November 14, 2023, 03:04:28 pm --- --- Quote from: Mike99 on November 14, 2023, 02:54:43 pm ---Here is the input VSWR measured on an FA-VA5 VNA (because my NanoVNA has a couple of inband spurious signals). --- End quote --- Are you using the basic calibration elements that came with the FA-VA5 or the better ones that they sell separately? --- End quote --- Shortly after I put that picture up I realised it was nonsense, and yes I do only have the basic cal kit for that VNA. I fixed the problem with my NanoVNA and tried again, using the SMA cal kit that came with it. Not ideal at higher frequencies but needs must. The result may not be spot on but it's the shape I expected. Mike |
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