REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol

[EEVblog]

A wiki is a good solution for this kind of thing.
I don't have time to maintain one, which tends to be everyone's problem with this kind of thing, but if someone wants to step up and manage the content I am willing to host one.

It could go on the EEVblgo wiki, but of course someone needs to maintain it and organise it which is a massive job to do it properly with different pages for all the issues and content that interest people.

[Carrington]

Wow! No doubt, is a massive job, unfortunately I do not have experience with these things. Apart from that I have little free time.
But surely, no shortage of brave people that want collaborate. Go it! 

[Carrington]

Could someone explain to me why 50,000 wfs are only reached at 20 ns and it decrease to lower base time? It is due to software, hardware or both.
Thank you very much.
Cheers.

[Hydrawerk]

I think it is mainly due to hardware... Well, they have no custom ASIC.

[Carrington]

I think it is mainly due to hardware... Well, they have no custom ASIC.

Yes is possible, and therefore the gds-2000a series uses a [[500Ms ADC x2] x2] to reach about 100,000 wfm/s. But I do not understand why the Rigol DS2000 not keep the 50,000 wfm/s for time base < 20ns.

This could be improved via firmware?

[CodyShaw]

A wiki is a good solution for this kind of thing.
I don't have time to maintain one, which tends to be everyone's problem with this kind of thing, but if someone wants to step up and manage the content I am willing to host one.

It could go on the EEVblgo wiki, but of course someone needs to maintain it and organise it which is a massive job to do it properly with different pages for all the issues and content that interest people.

This is a great idea for the site, and for anyone interested in making the DS2000 community a better place. We would be able to keep the forum to resolving issues rather than documenting.

[marmad]

Yes is possible, and therefore the gds-2000a series uses a [[500Ms ADC x2] x2] to reach about 100,000 wfm/s. But I do not understand why the Rigol DS2000 not keep the 50,000 wfm/s for time base < 20ns.

This could be improved via firmware?

You don't have your facts straight: the GDS-2000A only does it's 80k wfrm/s maximum with a 200MSa/s rate - 10 times lower than the 2GSa/s maximum - so 10 times lower the BW. In fact, at 2GSa/s, with it's small 1k sample size, the 2000A is not significantly faster than the Agilent or Rigol (it does a max. ~55k) - and likely slower when using the 1M sample size (no one has done tests yet).

Also, the GDS-2000A series update rate drops dramatically < 50ns - much more than the Rigol.

[Carrington]

You don't have your facts straight: the GDS-2000A only does it's 80k wfrm/s maximum with a 200MSa/s rate - 10 times lower than the 2GSa/s maximum - so 10 times lower the BW. In fact, at 2GSa/s, with it's small 1k sample size, the 2000A is not significantly faster than the Agilent or Rigol (slower at many settings) - and likely slower when using the 1M sample size (no one has done tests yet).

Also, the GDS-2000A series update rate drops dramatically < 50ns - much more than the Rigol.

Wow mate! I believe you. 
I rely on this table:

http://www.ittsb.eu/GDS-2102A%20Wfms%20measurments.html

And: Let me be clear, I am delighted with the DS2072.

[marmad]

I rely on this table:

That upper table is nonsense - Kiriakos didn't use the correct measuring equipment for measuring < 50ns - he claims the DSO is much faster than even Instek claims it is. 

You can see the real wfrm/s @ <50ns in Grego's video when he uses a Picoscope to measure the frequency.

Here is a table comparing the update rates and sample rates of the Rigol (w/14k) and the Instek (w/1k). I'd love to see someone measure the Instek's rate when it's using 1M sample length - I think the Rigol would beat it with 1.4M:

[Carrington]

Thanks for the information marmad. Spectacular the fall for t <50ns.

Could you please explain to me why 50,000 wfs are only reached at 20 ns and it decrease to lower base time?  It brings me head 
Could be the Wfrm/s improved via firmware?

[marmad]

Could you please explain to me why 50,000 wfs are only reached at 20 ns and it decrease to lower base time?  It brings me head 

Something to do with the way that Rigol has tuned the system. If you look at wfrm/s rates of other DSOs, it's not uncommon for the speed to reach a peak at a certain time base, then drop off.

Could be the Wfrm/s improved via firmware?

I doubt it (at least, not by much); I'm sure Rigol has already spent much time working to get as much speed as possible out of the design.

[CodyShaw]

Just unpacked my 2072!

Looks like it's running Software Version 00.00.01, and Hardware Version 1.0.

[Carrington]

Thank you very much marmad, I had seen this Application Note, and the truth is that Rigol has done a good job. 

I am impressed with the DS2072.

I compared it (at 20MHz BW) with an old analog HP1222A, from the viewpoint of noise and refreshment, and the refreshment in both screens is very similar (as far as my eye can discriminate). And in both the noise level is very low for a BW of 20MHz. Awesome!

With the DS4000 series also occurs this fall for t<20ns? You have a table?

[Carrington]

Just unpacked my 2072!

Looks like it's running Software Version 00.00.01, and Hardware Version 1.0.

Mine:
  Software version: 00.01.01
  Hardware version: 1.0

Yours is fast and loud? 

[CodyShaw]

Just unpacked my 2072!

Looks like it's running Software Version 00.00.01, and Hardware Version 1.0.

Mine:
  Software version: 00.01.01
  Hardware version: 1.0

Yours is fast and loud? 

What do you mean by that?   

[Carrington]

CodyShaw:

Nothing bad, I'm just kidding, my apologies. 
In my DS2072 the fan is quite noisy (loud). But here the temperature is 30 ° C, perhaps the fan is regulated by temperature (fast).

"Let the future tell the truth ...

[Carrington]

That upper table is nonsense - Kiriakos didn't use the correct measuring equipment for measuring < 50ns - he claims the DSO is much faster than even Instek claims it is. 

You can see the real wfrm/s @ <50ns in Grego's video when he uses a Picoscope to measure the frequency.

Grego's video (See  at ~ 12 min):
 

[CodyShaw]

CodyShaw:

Nothing bad, I'm just kidding, my apologies. 
In my DS2072 the fan is quite noisy (loud). But here the temperature is 30 ° C, perhaps the fan is regulated by temperature (fast).

"Let the future tell the truth ...

Thought so!

Mine is noticeable, but not loud. Cold basement (24 degrees or so)?

[CodyShaw]

Sorry, I didn't check my FW correctly...

Actual:

SW: 00.00.01.00.05

HW: 1.0.1.0.0

[UberSteve]

Hi All!

New DS2072 owner here! Unit arrived today from Emona Aus. Unit is apparently new stock just arrived from China and reports the following info in the System Information screen:
Serial: DS2A15270XXXX
Software version: 00.01.01.00.02 (latest I believe?)
Hardware version: 1.0.1.0.0
FPGA version:
 SPU 03.01.05
 WPU 00.06.05
 CCU 12.29.00
 MCU 00.05

Huge step up from my Bitscope... 

Thanks to all that have contributed to this thread, it's the main reason I decided on the DS2000. 

-Steve

[Carrington]

To UberSteve:
What model of probes was bringing?

[darrylp]

To UberSteve:
What model of probes was bringing?

As in are they rp3300 or rp3300a ?

The "a" version are not switchable between x1 and x10
 
--
 Darryl

[CodyShaw]

To UberSteve:
What model of probes was bringing?

As in are they rp3300 or rp3300a ?

The "a" version are not switchable between x1 and x10
 
--
 Darryl

My DS2072 I got yesterday came with the switchable RP3300 probes.

IIRC, you got the 3300A probes?

That is very lame on Rigol's part.

[jsykes]

Hi All!

New DS2072 owner here! Unit arrived today from Emona Aus. Unit is apparently new stock just arrived from China and reports the following info in the System Information screen:
Serial: DS2A15270XXXX
Software version: 00.01.01.00.02 (latest I believe?)
Hardware version: 1.0.1.0.0
FPGA version:
 SPU 03.01.05
 WPU 00.06.05
 
 CCU 12.29.00
 MCU 00.05

Huge step up from my Bitscope... 

Thanks to all that have contributed to this thread, it's the main reason I decided on the DS2000. 

-Steve

 
 
Congrats! Yours is VERY new. That 27 in the serial # denotes it left the assembly line the 27th week of the year, (a bit over 2 weeks ago) They must be shipping them air freight to your area.

[Carrington]

How about if we create a topic about the new/future verison/model of the Rigol´s oscilloscopes? 
Including: DS1000-Z, DS2000-S, DS2000-Z, etc.
With specifications, rumors and other.
What would be the suitable name for this topic?