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| Siglent SDG1032 as bad as rigol DG812? |
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| Aldo22:
The FY3224S even blows out +7-8V when switching it off. Even if the channel is not active. :palm: If I have something sensitive, I always put a 20dB attenuator in. Attachment shows FY3224S saying goodbye (with attenuator). |
| EvgenyG:
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. |
| Aldo22:
--- 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. --- End quote --- The FY3234S is even worse at power up (Attached image). But that was to be expected. However, you might not expect another voltage increase when switching off, which is why I only showed that at first. The internal AWG of the Hantek DSO2000 is somewhat better. It remains at 0 when switched off. At power up, however, it's approx. -3.8V max. |
| eTobey:
--- 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: |
| KungFuJosh:
What is your setup on your scope and AWG that you're able to see that? I tried with the SDG2122X connected to my SDS2504X+, and I couldn't get anything like that. I tried with the channel power button, and power cycling the AWG, and didn't get anything like that at all. Cycling the channel gave a clean waveform that simply ended/disappeared when disabled. No effect at all while power cycling the AWG. Even searching in History didn't give me anything like that. I dunno if the 2000 series is that different than the 1000 series in this regard. 🤷 |
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