Siglent SDS3000X HD and upgraded SDS1000X HD

[tautech]

100% but still possibly a design problem and we need to listen and feedback to HQ for their deeper tests...

If it's related to the PWM frequency of the LCD dimming, it would be amazing if it can be fixed in a software update . I guess 100% brightness is still dimmed to some degree, to get proper lifetime on the LCD.

It could be a HW revision issue, can you state HW version so we we can take this to HQ for their investigation.
TIA.

[Dennis Frie]

100% but still possibly a design problem and we need to listen and feedback to HQ for their deeper tests...

If it's related to the PWM frequency of the LCD dimming, it would be amazing if it can be fixed in a software update . I guess 100% brightness is still dimmed to some degree, to get proper lifetime on the LCD.

It could be a HW revision issue, can you state HW version so we we can take this to HQ for their investigation.
TIA.

Sure, hardware version 01-02. Please see attached image for further information

[Martin72]

Hi,

I don't have the problem, same hardware version.

[2N3055]

Yeah it's audible when sitting at my other desk ~3 meters away. The picture attached in the previous post is indeed just captured from an audio analyzer app on the phone. The phone app also shows the 6.1 kHz peak just fine at a few meters distance.

I can't seem to find the "Sound off" option? But it's constant, even with the channels disabled, scampling stopped etc.

Utility/System settings/Beeper
Result please ?

It has nothing to do with sounds of the scope.

Yeah it's audible when sitting at my other desk ~3 meters away. The picture attached in the previous post is indeed just captured from an audio analyzer app on the phone. The phone app also shows the 6.1 kHz peak just fine at a few meters distance.

I can't seem to find the "Sound off" option? But it's constant, even with the channels disabled, scampling stopped etc.

I never was bothered by it because I don't hear it.
So I went and measured.

At 1m distance there is slight peak at cca 6kHz but that one is at -88dB ..... So 4 orders of magnitude less than what you have. No wonder I can't hear it.
To investigate further with phone stuck right at the scope, touching it. So there is mechanical transfer too, so worst case scenario acoustically. It was no worse than -67dB.
That is 2 orders of magnitude less that what you claim at some meters.

And it is connected with screen backlight, by the way...

It is not a functional problem. It is not a general problem. It seem to be your particular scope combined with your sensitive hearing that is unlucky combination.
If it bothers you that much, please present the problem to Siglent support through vendor you purchased it from. I'm sure they will find some way to help you.

100% but still possibly a design problem and we need to listen and feedback to HQ for their deeper tests...

I doubt it is any kind of general design problem electrically. Some capacitors and magnetics simply sing.
My scope has exactly same frequency and I had to look for the frequency with microphone and analyser to find it, how quiet acoustically it is.

His scope might simply miss a drop of glue or some peculiarity with soldering or whatever. There might be some variation with his scope specifically but it is not a general design problem, or all of them would have it. But he should report it to Siglent because they might want to know to see if there is some manufacturing issue for a batch or simply his is statistical anomaly.
He might have unlucky component that so happens to sing at that exact frequency.

If that screen PWM frequency is under software control, this might even be solved with nudging PWM frequency few 100Hz up or down, out of mechanical resonance of the "singer"..

[ebastler]

Clearly the fan in those scopes is too quiet!

[2N3055]

Clearly the fan in those scopes is too quiet!

They are second quietest after 2000xHD that is completely silent at normal temps.
And as cooler weather comes in it gets more quiet..

[Martin72]

Yes, the 2000X HD is the quietest I've ever heard.
The 3000er first brutally high, then quieter.
“Reports” but from time to time again.

[egonotto]

Hello,

I just noticed that the SDS3000X HD has a USB 3.0 device port, while the SDS7000A H12 only has a USB 2.0 device port.

Best regards
egonotto

[KungFuJosh]

I just noticed that the SDS3000X HD has a USB 3.0 device port, while the SDS7000A H12 only has a USB 2.0 device port.

The SDS7000A lists USB2.0 as something supported by serial decoding. The blue USB ports it has are usually at least USB3.0, different shades may mean different versions.

[egonotto]

Hello,

I am only talking about the USB 2.0 device port.

The manual 6.3 Rear Panel Overview says:
"H. USB 2.0 Device: Connects with a PC for remote control"

The picture also shows the socket in white and not blue.
 
Best regards
egonotto

[KungFuJosh]

I guess they don't need that much throughput for device control. 😉 USB2.0 is 480Mbps.

[2N3055]

7000A has two Ethernet ports...
I don't use USB if I can Ethernet.. Just saying.

[KungFuJosh]

7000A has two Ethernet ports...
I don't use USB if I can Ethernet.. Just saying.

It really doesn't matter considering the scopes don't utilize the speed, but USB3.0 is faster than Gigabit LAN, and USB2.0 is faster than 100M LAN.

Either way, I also prefer ethernet over USB.

[2N3055]

7000A has two Ethernet ports...
I don't use USB if I can Ethernet.. Just saying.

It really doesn't matter considering the scopes don't utilize the speed, but USB3.0 is faster than Gigabit LAN, and USB2.0 is faster than 100M LAN.

Either way, I also prefer ethernet over USB.

I know that theoretic speed is faster. But Gigabit Ethernet is very convenient and fast enough for what I do..

[KungFuJosh]

I know that theoretic speed is faster. But Gigabit Ethernet is very convenient and fast enough for what I do..

I prefer the ethernet either way. Though I wish Siglent would allow us to increase the framerate on the web console. ~15fps isn't enough, I want at least up to 60fps as an option.

[temperance]

Can someone check if the SDS3K HD has the same problem:

https://www.eevblog.com/forum/testgear/siglent-sds2000x-hd-12bit-(published-for-chinese-domestic-market-only)/msg5657313/#msg5657313

Thanks.

[Martin72]

I can take a photo later.

[Dennis Frie]

A picture of the SDS3000X BNC connector

[2N3055]

Can someone check if the SDS3K HD has the same problem:

https://www.eevblog.com/forum/testgear/siglent-sds2000x-hd-12bit-(published-for-chinese-domestic-market-only)/msg5657313/#msg5657313

Thanks.

As I answered in that other topic, no piece of Siglent equipment that I have here has that problem including SDS2000xHD.
Even 800xHD has nice conicaly chamfered entry to guid the pin in.

[tv84]

A member sent me these BW sweeps made in a SDS3104X HD.

"... a tracking generator sweeping and the scope running continuous FFT with peak hold. While not perfect, it's enough to get a pretty good idea about the frequency response of the scope.

... manually changing the frequency and noticing the Vrms of the signal, that also indicated a -3 dB cutoff around 1250 MHz."

[seajayshore]

I’ve read most of this thread - apologies if this is detailed and I missed it - but has anyone tried out the “USB 2.0 decoding” functionality of the 3000HD yet? I can’t really find detailed reviews…

I have a 2000HD myself and was speccing a new similar or higher scope for work. This feature - if good - could be really interesting in my case!

I know other PC-attached USB protocol analysers do nice jobs filtering all the crazy number of different USB/class-type messages so you don’t go crazy testing a USB device spitting out so many messages. I was wondering if a scope with USB decode would even come close or if it’s something very basic like decoding to HEX/ASCII…

EDIT: Also wondering if USB decode *requires* the 1GHz unlock first as presumably 240MHz clock (or whatever USB 2.0 is) might need highest bandwidth to decode properly…

[2N3055]

I’ve read most of this thread - apologies if this is detailed and I missed it - but has anyone tried out the “USB 2.0 decoding” functionality of the 3000HD yet? I can’t really find detailed reviews…

I have a 2000HD myself and was speccing a new similar or higher scope for work. This feature - if good - could be really interesting in my case!

I know other PC-attached USB protocol analysers do nice jobs filtering all the crazy number of different USB/class-type messages so you don’t go crazy testing a USB device spitting out so many messages. I was wondering if a scope with USB decode would even come close or if it’s something very basic like decoding to HEX/ASCII…

EDIT: Also wondering if USB decode *requires* the 1GHz unlock first as presumably 240MHz clock (or whatever USB 2.0 is) might need highest bandwidth to decode properly…

AFAIK, SDS7000A does but SDS3000xHD does not support USB decoding at this time...

240Mhz is recovered clock frequency and pulses are square wave so in order to be able to see at least 5th harmonic (so signal at least resembles something at least similar to square), 1.2 GHz BW would be needed.

[seajayshore]

AFAIK, SDS7000A does but SDS3000xHD does not support USB decoding at this time...

240Mhz is recovered clock frequency and pulses are square wave so in order to be able to see at least 5th harmonic (so signal at least resembles something at least similar to square), 1.2 GHz BW would be needed.

Ah that's a shame - but yeah what you say makes sense...

I was trying to find where on earth I got the idea it did USB 2.0 decoding and it seems there is a PDF on the Siglent (EU) website here that, on page 25, shows a comparison of their various 12-bit scopes. The USB 2.0 decode option is clearly noted in both the SDS3000X-HD & the SDS7000A...

However checking the manuals it definitely seems only the 7000A has anything written here...

I'm wondering is @tautech may know more? I will send an email to Siglent EU anyhow... It reminds me of looking at the SHA850A spectrum analyser recently where they added some EMI features after and the manual still has no mention of them...

Anyway, ramble aside, I'll remain an optimistic fool and will report back if they give me a clear answer!

[KungFuJosh]

That's a lazy copypasta error in what I assume is an outdated doc. Check this one: https://siglentna.com/wp-content/uploads/dlm_uploads/2024/05/Siglent-time-domain-products-catalog-2024-05.pdf

[Martin72]

]AFAIK, SDS7000A does but SDS3000xHD does not support USB decoding at this time...
240Mhz is recovered clock frequency and pulses are square wave so in order to be able to see at least 5th harmonic (so signal at least resembles something at least similar to square), 1.2 GHz BW would be needed.

Could just work...
That's why I was surprised in the Magnova thread that it was said there that the USB protocol would be added later... at a maximum of 350Mhz bandwidth, that's a pretty ambitious thought, or they meant USB1.0.
That would also be possible for the 3000.