Siglent SDS2000X Plus

[Martin72]

 

[drwho9437]

No bill has arrived from DHL. I've had the scope since Friday. I really like this instrument. Going to try some Bode plots of an amplifier using the sig gen. So far its a gem.

Maybe there's no customs duties, but I'd make sure that you're not responsible personally to pay some sales tax or VAT in your country...

Since you mention Bode plots - I have a Siglent Wavegen that's craving to be hooked up to the scope

In the US in most states you are required to pay sales taxes on your annual state taxes as "sales and use" but it is generally not followed by most people who don't even understand the requirement. Some exceptions apply as well about having to pay sales tax even then, though state laws vary (just as state sales taxes vary).

[tautech]

Nice little case study with a SDS2354X Plus:
https://siglentna.com/application-note/analyzing-gsm-radio-protocol-with-a-siglent-sds2000x-plus-oscilloscope/

[jemangedeslolos]

Hello,

Little question :
Does anyone know the ADC reference?
Is it the same as on the previous vesions (SDS2000 and SDS2000x ) ?

[jemangedeslolos]

ADC08D1000     

I bet this is this one.

[Martin72]

Betting is not knowing….

[jemangedeslolos]

Betting is not knowing….

So it is why I choose the verb "to bet" instead of "to know"   
But Im pretty sure it is this one.

You have one. I'm sure you have a big hammer too or a crowbar at home, so that's the story of a few minutes only.
Go to work Martin 

[tautech]

Betting is not knowing….

So it is why I choose the verb "to bet" instead of "to know"   
But Im pretty sure it is this one.

You have one. I'm sure you have a big hammer too or a crowbar at home, so that's the story of a few minutes only.
Go to work Martin 

Maybe it is the same as used in SDS2000X-E also.

[douggoldberg]

So what do you guys think about purchasing the Siglent LA probe set vs buying a decent USB- based LA? I like having HW based decoding. Im mostly doing SPI, I2S, I2C. Trying to decide whats the best way forward. Any thoughts?

[2N3055]

So what do you guys think about purchasing the Siglent LA probe set vs buying a decent USB- based LA? I like having HW based decoding. Im mostly doing SPI, I2S, I2C. Trying to decide whats the best way forward. Any thoughts?

I have MSO, and being able to correlate analog/digital is very useful. Also DSOs usually have great serial triggers. USB LA have very basic triggering.
SDS2000X+ has a lot of memory so it should be able to capture lots of packets, especially using segments and intelligent triggering.

My experience is that if you need to correlate analog/digital and if you are looking at decoding at "hardware" level MSO is best. Like checking if things are flowing right between components of the system.
If you need to develop/debug "software" side of protocols (data centric, developing and debugging messages itself) than USB based LA is very useful.

But with long mem scope like SDS200X+ (or Picoscope as I have)  you probably can do most of what is needed. You can always buy one of those cheapo LA clones and use with Pulseview, for ultra long sequences and decode on PC. I think that would be most powerful combination.
That's my opinion based on my experience.

[maginnovision]

I'm pretty much with 2N3055. I almost always use my MSO and only take the LA out when I need more than the 16 digital channels it has. Typically those analog signals are needed too.

One other thing I do is feed scope trigger out to trigger of LA. Then duplicate at least a single signal to make sure I can correlate data. That's usually when I end up needing a lot of logic(sometimes all of scopes and the 32 of LA) and the analog signals. Saves time due to the effort of making all the connections. All my Protos have headers for logic these days or an addon for that purpose

[douggoldberg]

Thanks guys. Im convinced. Placing order for probe set. They better be really good for that kind of $$.

[Martin72]

@ Sinisa,

Here are the max. frames the siglent can decode

[tautech]

Thanks guys. Im convinced. Placing order for probe set. They better be really good for that kind of $$.

It is nice but I agree it's overpriced.

AFAIK it edge connects to what looks like a PCI-e finger socket on the MB then splits into the 2 multicore flat cables.
A custom PCI-e socket plug is used for the twin flat cable.
Unknown if there are active bits in the cable ends where the breakdown headers then connect.

We should do some analysis I guess, even bussing bits of it out with a DMM might tell us lots.

[Martin72]

You have one. I'm sure you have a big hammer too or a crowbar at home, so that's the story of a few minutes only.
Go to work Martin 

Mhh…
Normally I don´t like to open functional units 

It is nice but I agree it's overpriced.

In this case, rigol and siglent are brothers...

[tautech]

It is nice but I agree it's overpriced.

In this case, rigol and siglent are brothers...

Nope, not in SDS2kX, SDS5kX or SDS2kX Plus, none of that cheap arsed flat IDE ribbon cable rubbish ! 

[Martin72]

Rob...

[thinkfat]

Still playing around with the instrument, I really like the FFT implementation. It's easy to set up and I totally dig the markers.

I measured a 10MHz Butterworth low-pass filter that is supposed to create a sine from a square wave by suppressing the harmonics and it's really nice being able to just set markers on all harmonics and then see how many dB the most prominent harmonic is below the carrier. The only grief I have that it seems not possible to set the vertical config to dBc instead of dBVrms or dBm. I get the absolute value of every marker and a simple subtraction addition gives me what I need, but it would nevertheless be more convenient to just have marker #1 setting the reference and then listing all other markers relative to marker #1.

Anyway - with the DS1054Z and its toy FFT, I was barely able to see that the highest harmonic was maybe better than -40dBc. With the SDS2000X+, I can clearly see it's -50dBc.

This is going to make my life a lot easier :-D

[jemangedeslolos]

It is nice but I agree it's overpriced.

In this case, rigol and siglent are brothers...

Nope, not in SDS2kX, SDS5kX or SDS2kX Plus, none of that cheap arsed flat IDE ribbon cable rubbish ! 

But it is easy to hack on MSO5000 
On higher range, Rigol use the exact same PCI-e connector as Siglent.

[nctnico]

On higher range, Rigol use the exact same PCI-e connector as Siglent.

It would be interesting to understand what connector is being used for the MSO exactly. Regular PCIe / Micro-SAS connectors for example have a limit of 30 to 50 mating cycles. Using such a connector wouldn't be a good choice.

[Emo]

The connectors have no identification whatsoever. They look sturdy and the flat cables feel "rubber" like

Eric

[tautech]

The connectors have no identification whatsoever. They look sturdy and the flat cables feel "rubber" like

Eric

Cross posting with more pics:

[nctnico]

Thanks for the pictures. That is the same connector which is used for a standard PCI express slot indeed. That is a rather bad choice. Even this thick gold plated one from Molex specifies 50 mating cycles:
https://www.molex.com/molex/products/part-detail/edge_card_connecto/0877159006
Using one or two HDMI connectors would have been a much wiser choice. HDMI also exists in a wider 29 pin B variant. These connectors are made for regular use and can be build to last thousands of mating cycles.

[Martin72]

Mating cycles are indeed an interesting point.
eSATA connections for example got 5000 mating cycles vs only 50 for internal SATA ( what makes sense, once plugged in you leave it plugged in).

[tautech]

Thanks for the pictures. That is the same connector which is used for a standard PCI express slot indeed. That is a rather bad choice. Even this thick gold plated one from Molex specifies 50 mating cycles:
https://www.molex.com/molex/products/part-detail/edge_card_connecto/0877159006

Yes well if we give some thought to the possible configuration used when there are 36 socket connections for 16 MSO channels, would each channel consist of a differential pair ?

Some initial buzzing out suggests there is some active circuitry in both the lead breakout sets and the flat pair cable assembly. All cable ends are not hermetically sealed instead they appear to have a clipped in portion that might need X-rays to determine how they might come apart.