| Products > Test Equipment |
| Gw Instek GDS2204E (200MHz 4 channel DSO) review |
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| KrisztiƔn:
--- Quote from: rhb on January 30, 2019, 03:07:46 am ---It would be nice if the FRA app were usable on the units *with* AWGs. A scan from 13-14 MHz at the maximum sampling of 90 samples per decade produces two points. So no way to find the resonances of a crystal with that. --- End quote --- Last weekend my buddy and me measured a 9 MHz crystal in FFT mode with the help of a BG7TBL noise source. Persistence was set to infinite. I think you'll not get the necessary resolution until switching to 1M record length. Spectrum averaging by oscilloscope would be nice. That was a GDS-2104E oscilloscope. |
| nctnico:
If you use the key generator (see the GDS1054B thread) then you can use the SA mode which does support averaging multiple FFT traces. |
| KrisztiƔn:
In SA mode you'll get only 5kHz resolution at 9MHz because record length is fixed at 10k. |
| nctnico:
Not on my GDS2204E. It seems in spectrum analyser mode the record length is fixed to 100kpts. This image was created using the max-hold function and using an RF generator to step through the frequencies. Yes, this is a slow process... but it works. Edit: the record length may be bound to the RBW. |
| rhb:
I used an AWG (don't recall if it was the 2204EA or the 33622A) to sweep a 40 MHz 3rd overtone xtal from 13.2 to 13.6 MHz. The Instek SA function displays the series notch as a peak. I'll add a screen shot to this post later. I *think* I saved one, but I'd have to root around to find it and it was fairly tedious to set up if I have to do it over. The Instek record length is fixed at 100 Kpts. The RBW then depends upon the frequency span. I plan eventually to get a Siglent SDS1104X-E and do a series of head to head comparisons for the same measurements with the Instek MSO2204EA, Owon XDS2102A and Rigol DS1102E. All accompanied by the correct answer using my HP and Tek gear. But at the moment I am having far too much fun with a Tek 11801 using the calibrator and an SD-26 sampling head. In particular, I've been doing TDR on cables, connectors, terminators etc. I'm amazed at how much detail I can see with 20 GHz of BW. |
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