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

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mohandes:
hi to all guru
any people here have SDS2072 and DS2072 ? i want if have it take photo in test with same wave in both and set here.
regards

Teneyes:
Hi All, 
In the past when I would insert a USB stick with a DS2000 '.GEL' file the DSO would display the version number and prompt "OK" to install ,but now It will only prompt if it is a new FW version. see Pix.
Has anyone else seen this?
When I go back to older version (boot/help), I do not get the update prompt just the 'USB device detected'.

  Also
Has anyone ever seen  all:
       100M
       200M
       300M Bandwidth  options displayed like in Pix

ted572:

--- Quote from: Teneyes on July 09, 2014, 02:59:31 pm ---Hi All, 
In the past when I would insert a USB stick with a DS2000 '.GEL' file the DSO would display the version number and prompt "OK" to install ,but now It will only prompt if it is a new FW version. see Pix.
Has anyone else seen this?
When I go back to older version (boot/help), I do not get the update prompt just the 'USB device detected'.

  Also
Has anyone ever seen  all:
       100M
       200M
       300M Bandwidth  options displayed like in Pix

--- End quote ---

     Teneyes:

Re. first item (with USB Drive inserted: Yes I see this also now.

Re. second item (with 100MHz, 200MHz, and 300MHz:  Yes you will have this if you install the 100MHz BW, 200MHz BW, and them the 300MHz BW Options in that order.  What I like about this is having the standard 20MHz BW Limit, plus !00MHz BW Limit, and possibly 200MHz BW Limit available if 300MHz is installed.  Had you noticed the added BW Limit functions?

Do you have a DS2000 (non A version?), and if so is the 300MHz Option working OK for you?  Please see 'marmad's post in Reply #2524 at >  https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg467738/#msg467738
Have you experienced this?  I have a DS2000 (non A) and I had NOT seen this issue, so I'm wondering if he may have had something else wrong, such as having settings with Power Up set for 'Last', rather than 'Default', which can result in getting into a loop of unsuccessful reboots if you experience a lockup, or an insidious fault condition.

Anyway I removed the 300MHz BW Option for now until I hear more about this form either 'marmad' or others.

The DS2000A is fine with the 300MHz BW Option, and I thought that the DS2000 (non A) was also OK now starting with Firmware v.3 until I saw 'marmad's' post.


    marmad:

I would appreciate hearing more from you on the issues you had. Have you learned anything else since your experiences with the DS2000, FR v.3, and the 300MHz BW Option?

   Thank you for any information you can add since your post in Reply 2524, Ted552

marmad:

--- Quote from: ted572 on July 09, 2014, 06:13:17 pm ---    marmad:

I would appreciate hearing more from you on the issues you had. Have you learned anything else since your experiences with the DS2000, FR v.3, and the 300MHz BW Option?

   Thank you for any information you can add since your post in Reply 2524, Ted552

--- End quote ---

To clarify some things (and I posted this over at the 'Sniffing' thread, too):

First of all - in respect to using the "300MHz" BW option - it makes NO difference if you have a DS2000 or DS/MSO2000A - other than you have the 50 ohm input impedance choice. Aside from that, as far as I've seen, Rigol did not make any major changes to the front-end.

Secondly, to all the people who believe they are magically getting a perfectly-capable "300MHz" DSO just because they put in some option codes: look at all the DSO models from highly-respected test-equipment manufacturers (Agilent, Hameg, Tektronix, etc) - do you see any 2GSa/s DSOs with a higher than 200MHz BW? No, you don't - because there are mathematical reasons why it doesn't really work well. Rigol (and the other Chinese companies) have not invented some new wonderful method for squeezing more BW out of less sample rate - they are, in fact, delivering DSOs that will have problems reproducing those kind of BW waveforms accurately at certain settings (i.e. both channels on) - period.

As long as you understand these problems, fine. But again: they are identical for both DS2000 and DS2000A - it doesn't matter which model you have.

[Additional]:
Now, in terms of the continual hanging problem - I haven't seen it happen again since I removed the 300MHz option and downgraded to v.2 - then upgraded back to v.3 later after my work was done. But I was working with Roll mode and some rather atypical settings - so it's possible that the same settings with v.3 but without 300MHz would also cause the hanging - I just haven't been able to reproduce it since. So at this point, it's unknown if it's just a bug that exists in v.3 with certain settings - or is linked to 300MHz option being installed. But I have to say, before I ever began using the 300MHz option, the DS2000 crashed or hung fairly infrequently - but it's happened many more times with it installed. But more info is definitely needed to pinpoint the source of this problem.

Orange:
If you  install the 300MHz option on a DS2000, your scope's rise-time is indeed lowered, however you also gain a fair amount of overshoot on pulses. The overshoot measured with a TEK 284 (70 pico sec. step) was in the order of 15%. So I decided that this is not acceptable for me, and turned it off.

The front end of a DS2000 is simply not designed to cope with this. Therefore Rigol has limited the bandwidth of the first preamp.
I don't know about the DS2000A models, I never measured them.

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