New Siglent SPD4000X series power supply

[pdenisowski]

I checked for several Keysight and R&S standard PSU units and there is not even a single mention of how fast internal V/A meters sample values..

Understood, but unless these values are logged and/or used for statistics measurements (capture a very fast spike so that Vmax reflects this), it might be a moot point. But it's a good question and I will ask our developers about this.

Or how fast is request, measure, reply cycle time for SCPI readout, on various interfaces.

I don't know any manufacturer who formally specs this for any instrument.  SCPI response time varies considerably based on a lot of things, so developing a methodology to compare SCPI response time specs would be very difficult.

[nctnico]

Agilent / Keysight has SCPI response times for most of their equipment aimed for use in automated testing rigs. For example their 34461 DMMs have a throughput specification for the various interfaces. Same for the 33500 waveform generator and N3300 DC load series.

[slavoy]

I was just referring to the screen refresh rate, not sampling or logging. Just that simple useful thing..
BTW Does spending $1100 on a power supply ensure the encoder works well? 

[2N3055]

I was just referring to the screen refresh rate, not sampling or logging. Just that simple useful thing..
BTW Does spending $1500 on a power supply ensure the encoder works well? 

Are you sure you are not confused about some things? Are you in the right topic? What PSU are you talking about?

[tszaboo]

Perhaps you are right but maybe if the people would carelessly use leads with bare metal showing in HV situations it may be advantageous in the long run to allow them to win their award. 

Does this count? It's only 40 amps at 20 volts ...

(Please don't try this at home)

Cool. Let me know when you guys made a 4000A capable, 0.003% accurate 2 and a half-ish quadrant power supply that will measure every 100us.

[2N3055]

Perhaps you are right but maybe if the people would carelessly use leads with bare metal showing in HV situations it may be advantageous in the long run to allow them to win their award. 

Does this count? It's only 40 amps at 20 volts ...

(Please don't try this at home)

Cool. Let me know when you guys made a 4000A capable, 0.003% accurate 2 and a half-ish quadrant power supply that will measure every 100us.

 

[pdenisowski]

Cool. Let me know when you guys made a 4000A capable, 0.003% accurate 2 and a half-ish quadrant power supply that will measure every 100us.

 

[pdenisowski]

I was just referring to the screen refresh rate, not sampling or logging. Just that simple useful thing..

Okay, that makes sense   We definitely don't spec that.  Has that been an issue for you?  The reason I'm asking is even my cheapest "hobby" power supply display seems to update more or less instantaneously from a human point of view.

[Martin72]

Here again something on the actual topic:




https://www.batronix.com/shop/siglent/SPD4000X.html

The prices seem reasonable, but visually it's just not mine.

[pdenisowski]

Agilent / Keysight has SCPI response times for most of their equipment aimed for use in automated testing rigs. For example their 34461 DMMs have a throughput specification for the various interfaces. Same for the 33500 waveform generator and N3300 DC load series.

It would help if they would use the word "SCPI" when describing this in their data sheets   The stats I could find seemed to reference primarily GPIB*, and for the 34461 they (vaguely) indicate that "VXI-11 connections may be slower"   But I agree that for automation / production this would be very useful information.

https://www.keysight.com/us/en/assets/7018-03846/data-sheets/5991-1983.pdf
https://www.keysight.com/us/en/assets/7018-05928/data-sheets/5992-2572.pdf
https://www.keysight.com/us/en/assets/7018-06712/data-sheets/5980-0232.pdf

*Nothing against GPIB (I just did a video on it, as a matter of fact), but delays in GPIB are much more "deterministic" than VX11/LAN, at least in my experience.

[pdenisowski]

Here again something on the actual topic:

  From the video it looks like the readback update rate is somewhere on the order of 1 Hz

[KungFuJosh]

The prices seem reasonable, but visually it's just not mine.

It's kind of weird to see the channel numbers in order. 😉

[TomKatt]

Here again something on the actual topic:

https://www.batronix.com/shop/siglent/SPD4000X.html

The prices seem reasonable, but visually it's just not mine.

That's some over-the-top slick marketing production work for a power supply

Personally, I kinda like the new dark mode look.  But the neon color channel buttons do stick out on that dark grey face 

[Martin72]

It's kind of weird to see the channel numbers in order. 😉

To me, the thing looks like a toy, why can't it be designed in a more objective and functional way...

[thm_w]

I don't get how it looks like a toy, its literally the same style as a keysight with a few more rounded edges. Colors are super practical.

Here again something on the actual topic:

  From the video it looks like the readback update rate is somewhere on the order of 1 Hz

Yeah 1 or 2Hz, not impressive considering the cheap processing power we have these days. Though to be fair most PSUs are similar.
Its almost never a hardware limitation either, just software people not optimizing or not understanding display DMA.

[Martin72]

I don't get how it looks like a toy, its literally the same style as a keysight

I didn't say that Keysight looks more “professional” to me.
I'm older, I prefer a sober design.

[KungFuJosh]

I bet somebody likes the look of a classic Agilent 6114A. 😉

[tautech]

To me, the thing looks like a toy, why can't it be designed in a more objective and functional way...

Like how ? ? 

[jjoonathan]

It's missing the Keysight racecar stripe.

I am waiting for one with flame decals on the side.

[slavoy]

Okay, that makes sense   We definitely don't spec that.  Has that been an issue for you?

If its slower than 3Hz, for me, yes. I consider 5Hz to be optimal.

I don't get how it looks like a toy, its literally the same style as a keysight with a few more rounded edges. Colors are super practical.

IMHO, there's nothing wrong with the colors themselves. To me, it doesn't look like a toy. More like it's recycled, old from the start or they ran out of dye. Take a good look: It's not black; it's worn out black-yellow-brownish. Why not going for full black instead 

[tszaboo]

Cool. Let me know when you guys made a 4000A capable, 0.003% accurate 2 and a half-ish quadrant power supply that will measure every 100us.

 

I know it sounds silly, but all the specification for that project was customer driven.
German EV standards defined that battery packs ESR had to be measured with 10C discharge, so if you have a 300Ah battery pack, you needed to discharge it with 3000A. We had this 80 channel battery tester, 50A per channel, and you could place all the channels in parallels. The rest of the specifications, they also had very good reasons to measure coulombic efficiency, or to be able to discharge a battery to 0V.
Disclaimer, I only did the analogue boards for the project.
And I thought we are doing the the one-uppmanship.

[mawyatt]

The color can be misleading as it's rendered by the camera and image post processing, then on your monitor. If your monitor is not one of the expensive "Calibrated" types (or Calibrated with a proper device), then it's difficult to determine the actual precise color.

Edit: Just took a look at our SDS800X HD, it's the "Dark" color and if the SDP is the same, then it does have a brownish tint to our eyes, whereas the Keysight "Dark" has a charcoal with a slight blueish tint.

Personally think this new PS looks fine, also like that Siglent has "listened" to users and placed the Terminals at standard spacing (keeping with color coding the ends like previous models), and included a numeric keypad, all per user/complainer inputs

One will soon find out that without color coded terminal ends it's very easy to mis-plug the connections when the PS is straight on (~level with the eye). Results can be disaster in the waiting, don't ask how we know!! Our GPP-4323 has this problem and we used Acrylic Paint to color the terminal ends, after an "Experience"!!

Also Siglent has included Remote Sensing to the main channels, this is a welcome addition as one can create a custom cable that senses at the cable ends. This allows one to "Cheat" and use a smaller core cable and still deliver the proper voltage to the DUT without worry for cable drop.

Best,

[2N3055]

, after an "Experience"!!

 

[mawyatt]

, after an "Experience"!!

 

Don't laugh, that "Episode" cost a few $ and some choice words directed at the GPP 

Then the finger pointed back at ourselves as the true culprit 

Best,

[Furna]

I am a little bit disappointed by the cables' quality ...



Those plastic cover over the cocodrile will squish all around the places ... I would have preferred something like



I didn't powered it on yet ... have to finish to cable the LAN (damn I am out of ports on the switch after this boy!)