Products > Test Equipment
Siglent SDG1032 as bad as rigol DG812?
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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