Products > Test Equipment
Siglent Technologies SDS1202X-E 200 mhz Digital Oscilloscope 2 Channels
13hm13:
Thanks for everyone's feedback.
It's important to keep the MAIN issue the forefront: the cold-boot issue.
It was presented earlier in this thread here:
https://www.eevblog.com/forum/testgear/siglent-technologies-sds1202x-e-200-mhz-digital-oscilloscope-2-channels/msg4711016/#msg4711016
Notice the distorted 1k sqr waveform. The probe's own switch was on 1x, as was the Siglent's menu-setting (1x). And I've had prev. cold-boot issues that I did not image.
This unreliability reduces my confidence in the day-to-day operation of this 'scope .... and, perhaps, of Siglent's overall QC standards. See my OP.
I do not have reliability issues with my other scope-in-the-house, the Tek 465. All orig. 1976 components inside; electro caps orig AFAIK. When I purch'd from eBay (2008), it was sold for $50 non-functional from US Navy labs. One Tant. cap brought it back to life with a great trace --- no issue with it ever since.
About the cold-boot issue with my Siglent .... as I noted earlier, it has less than 4-5 hours total use time since purchase in mid 2020.
Working on audio gear -- especially audiophile gear -- and some computer stuff, I have noticed weird reliability issues that go away magically after the device has attained some use hours. No sure about this settlement process ... e.g., current travelling thru new traces, wires, etc, smoothing and "sanding" out the path until the electrons "flow" smoothly and reliably. Very mystical ,the Simulation is ;)
tautech:
--- Quote from: 13hm13 on February 19, 2023, 08:23:05 pm ---Thanks for everyone's feedback.
It's important to keep the MAIN issue the forefront: the cold-boot issue.
It was presented earlier in this thread here:
https://www.eevblog.com/forum/testgear/siglent-technologies-sds1202x-e-200-mhz-digital-oscilloscope-2-channels/msg4711016/#msg4711016
Notice the distorted 1k sqr waveform. The probe's own switch was on 1x, as was the Siglent's menu-setting (1x).
--- End quote ---
You have been asked to test again without the probe with a piece of wire or even with a Tek probe.
We need to eliminate probes as the cause.
13hm13:
--- Quote from: BillyO on February 19, 2023, 07:07:58 pm ---Did you do the compensation adjustment on your probes in 10X mode?
--- End quote ---
No! And yes, this cleaned up what I reported earlier today. So I am making some progress :-+
Cold-boot reliability still on wait-n-see ...
2N3055:
--- Quote from: 13hm13 on February 19, 2023, 08:48:34 pm ---
--- Quote from: BillyO on February 19, 2023, 07:07:58 pm ---Did you do the compensation adjustment on your probes in 10X mode?
--- End quote ---
No! And yes, this cleaned up what I reported earlier today. So I am making some progress :-+
Cold-boot reliability still on wait-n-see ...
--- End quote ---
Unfortunatelly, you didn't clear much. You keep repeating same sentences and randomly test some stuff nobody asked you..
Please answer the questions:
1. Is this cold start problem you see only on CH2 ?
2. If you connect 1x probe on "warm" scope and now see it correctly, don't touch anything and shutdown scope. Leave it for few hours (you said that is needed for it to act up). Then start it up and verify if signal is distorted.
3. If signal is distorted, how long it takes to "clean up"? Is it gradually going to normal or it snaps back in instant at one moment?
JeremyC:
--- Quote from: 13hm13 on February 19, 2023, 08:48:34 pm ---
--- Quote from: BillyO on February 19, 2023, 07:07:58 pm ---Did you do the compensation adjustment on your probes in 10X mode?
--- End quote ---
No! And yes, this cleaned up what I reported earlier today. So I am making some progress :-+
Cold-boot reliability still on wait-n-see ...
--- End quote ---
Did you processed self-calibration? If not then please do, the process is described in the user manual.
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