Products > Test Equipment

New Siglent SPD4000X series power supply

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seajayshore:
I’ll be buying one of these supplies soon…  :-+

Can anyone who’s had both an SPD4000X and SPD3000X say if fan noise is improved/worse/similar?

I know that’s a very use-dependant situation… So just any rough comparison & opinion is all I’m looking for!

sparky2024:
Has anyone else noticed that, with all four channels switched off, when using the master power switch to turn the whole power supply off, channels 2 and 3 will “pulse” the set power level briefly?  I do note that relays toggle when master power switch is turned off also.

I am seeing this on HW rev 0 SPD4323X, and wonder if this really is an issue (I am afraid of zapping a work in progress breadboard circuit or device I may be diagnosing with “unexpected power”), and whether it could be a firmware fix?

mawyatt:

--- Quote from: sparky2024 on October 22, 2024, 11:02:31 pm ---Has anyone else noticed that, with all four channels switched off, when using the master power switch to turn the whole power supply off, channels 2 and 3 will “pulse” the set power level briefly?  I do note that relays toggle when master power switch is turned off also.

I am seeing this on HW rev 0 SPD4323X, and wonder if this really is an issue (I am afraid of zapping a work in progress breadboard circuit or device I may be diagnosing with “unexpected power”), and whether it could be a firmware fix?

--- End quote ---

That shouldn't happen with any power supply, regardless of pedigree or cost, even a DIY version  :(

Our SPD3303Xs and GPP4323 don't behave this way, if they did we wouldn't have or use them. As you mentioned too much chance for sensitive circuit damage :--

Hopefully this misbehavior is only with your individual PS, and not typical behavior for these new SPD4000X models.

Best,

Furna:

--- Quote from: sparky2024 on October 22, 2024, 11:02:31 pm ---Has anyone else noticed that, with all four channels switched off, when using the master power switch to turn the whole power supply off, channels 2 and 3 will “pulse” the set power level briefly?  I do note that relays toggle when master power switch is turned off also.

I am seeing this on HW rev 0 SPD4323X, and wonder if this really is an issue (I am afraid of zapping a work in progress breadboard circuit or device I may be diagnosing with “unexpected power”), and whether it could be a firmware fix?

--- End quote ---

My unit SDP4121X HW rev 0
What firmware version are you running? The firmware version 4.1.2.6R2 that was running when my unit arrived is NOT available on the web site while 4.1.2.8 and 4.1.2.8R1 are available
https://www.siglenteu.com/service-and-support/firmware-software/dc-power-supplies/#spd4000x-series

While powering off using the master switch (with NO load connected) I could NOT hear the relays ... will try to better reproduce when back from work.

KungFuJosh:
Why not use single trigger on your scopes to test this?

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