Products > Test Equipment
Gw Instek GDS2204E (200MHz 4 channel DSO) review
Hydrawerk:
Thanks for the review.
nctnico:
--- Quote from: markone on February 02, 2016, 02:07:53 am ---
--- Quote from: nctnico on February 01, 2016, 05:59:17 pm ---
There is intensity grading but it starts from 50% intensity and then goes up. This means it doesn't simulate an analog scope but has the practical purpose of showing a signal very clear when there is a signal. IMHO this is a good thing; I don't want a scope which shows signals in a way they are hardly noticeable. I have used my fair share of analog scopes and one of the problems I ran into repeatedly was dim (hardly visible) signals.
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Many thanks, now it's clear how it works.
As far as i understood you owned a Siglent SDS2000, in which areas do you think that this one is much better ?
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First of all: the GDS2204E has mature firmware which works and the SDS2000 doesn't so there isn't really any sensible comparison to make ;)
But I'll try.... Compared to the SDS2000 the GDS2204E is cheaper, has an impressive amount of processing power under the hood, has way more FFT points (1 million versus 1000), decodes the entire memory, can average much longer traces, has input filtering, more extensive math functions, saves images as PNG (instead of uncompressed BMP), decoding is included and more extensive protocol triggering to name a few.
markone:
--- Quote from: nctnico on February 02, 2016, 10:38:49 am ---First of all: the GDS2204E has mature firmware which works and the SDS2000 doesn't so there isn't really any sensible comparison to make ;)
But I'll try.... Compared to the SDS2000 the GDS2204E is cheaper, has an impressive amount of processing power under the hood, has way more FFT points (1 million versus 1000), decodes the entire memory, can average much longer traces, has input filtering, more extensive math functions, saves images as PNG (instead of uncompressed BMP), decoding is included and more extensive protocol triggering to name a few.
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Well, lot of important points, ie " decodes the entire memory" and 1M FFT's point will be important for me, i will be tempted to buy the 100Mhz 2 channels version but things like not shielded & whining PSU and overall not so great build quality worry me a bit.
Many thanks for your prompt answer.
wraper:
--- Quote from: markone on February 02, 2016, 11:02:18 am ---Well, lot of important points, ie " decodes the entire memory" and 1M FFT's point will be important for me, i will be tempted to buy the 100Mhz 2 channels version but things like not shielded & whining PSU and overall not so great build quality worry me a bit.
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I'd prefer non shielded Instek over siglent rust. Also, from what I have read, it seem to use quasi-resonant SMPS topology, so the need for the shielding should be significantly reduced.
markone:
--- Quote from: wraper on February 02, 2016, 11:24:02 am ---I'd prefer non shielded Instek over siglent rust. Also, from what I have read, it seem to use quasi-resonant SMPS topology, so the need for the shielding should be significantly reduced.
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Watching to Dave's 1000B teardown video @31:25 you can see some quite strange periodic noise stuff, i'm wondering if it comes from PSU, that seems to be identical to the one mounted on GDS2000E family.
Regardless of the switching PSU's topology you always have high dV/dT circuit traces, avoid shieldind is not an option without implications, also for safety reason.
If some capacitor blows out, with open frames solution like that the whole instrument is involved.
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