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| csuhi17:
DG912Pro In its settings, I could not find one that would start with an active output, and I could not detect an abnormal wave when it was switched on. no problem with normal shutdown. when cutoff the main, it produces similar waves on the active output. Pictures 3 and 5 with 50 ohm termination Pictures 2 and 4 are without 50 ohms. |
| eTobey:
--- Quote from: thm_w on May 17, 2024, 09:49:48 pm --- --- Quote from: eTobey on May 17, 2024, 06:54:33 pm ---I just tried to see, when the sinewave amplitude would decrese with rising frequency: It did increase to 4.17V amplitude, with a set up amplitude of 3.3V. Am i missing something? --- End quote --- Are you sampling a 30MHz sine wave at 100ks/s? --- End quote --- No, i sampled a frequency sweep of a sine wave with 100ks/s. I did it again with 10Ms/s, and it makes no difference. --- Quote from: csuhi17 on May 18, 2024, 04:53:15 am ---no problem with normal shutdown. --- End quote --- If you call an exceeeding of a level of about 3-4V not a problem, then i wonder, on what circuits you work, that dont have a problem with this. How does this look with a 3.3V level? How do both channels look then? |
| csuhi17:
--- Quote from: eTobey on May 18, 2024, 05:38:39 am --- --- Quote from: csuhi17 on May 18, 2024, 04:53:15 am ---no problem with normal shutdown. --- End quote --- If you call an exceeeding of a level of about 3-4V not a problem, then i wonder, on what circuits you work, that dont have a problem with this. How does this look with a 3.3V level? How do both channels look then? --- End quote --- Maybe I misunderstood your question. When the channel is active and I press the power button and press restart or shutdown, the output waveform is the image of R1. There is only a problem with it in the event of a power failure. Which could be solved with an uninterruptible power supply. This is the Pro version, not the older one. DG912 Pro And R0 is the 3.3V square wave. CH2 with 50 ohm termination. Without CH3 50 ohms. |
| rf-loop:
--- Quote from: eTobey on May 17, 2024, 03:31:33 pm --- --- Quote from: EvgenyG on May 17, 2024, 03:27:05 am ---Could you please do the same measurement at power up? One of the things that must be tested on all signal gens during reviews: what happens at power up/shut down. A bad design could kill your DUT. To SDG1000X owners, could someone please do same measurements on your unit? The signal gen may change waveform/frequency on power down but not go higher than set amplitude/offset. Ideally it should just cut out. On power up, I expect exactly 0 volts until I press CH1/2 on buttons. --- End quote --- Too much expectation for a >300 bucks device... I might not even use this on my circuit and send it straight back... Picture of SDG 1032X on turning off: --- End quote --- SDG1062X Power button shut OFF when Ch1 1kHz square 0-5V Ch1 50ohm (SDG), Ch1 in oscilloscope 50ohm and Ch2 5Vdc out. Ch2 HiZ (SDG) and Ch4 in oscilloscope 1Mohm (of course SDG hardware output impedance is always 50ohm) Both channels direct connect with ~1m Suhner RG223/U Scope Trig: Ch1, Edge, Rising, Normal Where is the problem? SDS3104X HD |
| eTobey:
--- Quote from: rf-loop on May 18, 2024, 08:22:34 am --- Where is the problem? --- End quote --- The Problem is, that limits were exceeded. You obviously havent tried much with it. It seems to only happen on high level. Turn it off on high level. |
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