I ran more tests than what made it into the final edit!
6:50 "Pleas don't remove the U disk..." I'm wondering why they didn't spell out the word USB.
A big thanks to Dave and Marmad, I have learned a lot more about capture rates since reading this thread. One thing Marmad don't you agree with Dave that triggering is the way to find the glitches?
My second comment on all of this comes from 15 years of doing repair work. For me weird Glitches were very rare in the repair world and when I did come across it; most of the time I could just use my old Analog scope and Tap or twist the board and bingo the glitch would appear or disappear.
Repair work is a very different beast than development. Glitches of the type that a high waveform capture rate helps with are almost exclusively caused by design errors not hardware failures. If they show up in the field, it means there was insufficient testing for e.g., timing variation vs. temperature and you should just send the board back to the designer. As a corollary, a glitch that results from a design error cannot usually be fixed by swapping out with a known good board so you really have to find the problem.
That certainly sounds like the best way Dave but don't you think the Pass/Fail could also work?
I imagine that on a low end DSO that's going to run into the same capture rate issue??
BTW Dave can you setup a standardized test on a video that anybody with a DSO and a arb generator could use to test their scope? It would give all of us great data to publish in the videos forum thread and since you have several dso we could see how our cheapies stack up in an apples to apples comparison of wfcr.
One thing Marmad don't you agree with Dave that triggering is the way to find the glitches?
That certainly sounds like the best way Dave but don't you think the Pass/Fail could also work?
I imagine that on a low end DSO that's going to run into the same capture rate issue??
BTW Dave can you setup a standardized test on a video that anybody with a DSO and a arb generator could use to test their scope? It would give all of us great data to publish in the videos forum thread and since you have several dso we could see how our cheapies stack up in an apples to apples comparison of wfcr.I wonder always that the discussion about wfm/s starts in many forums again and again and reveals the lack of knowledge about digiscopes' basics. The Pass/Fail test is intended to be used to find deviation of a waveform and to define a tolerance band around a given signal. It never can replace methods searching for outliers and there are a few reasons why.
The Rigol DS2202 is priced $800.00 AUD in Australia
Don't buy the Agilent DSO1072B.
Hello everyone,
I was hoping you guys could provide me with some feedback:
I am looking at purchasing the Rigol DS2072 but I am a little hesitant as i am not very familiar with the Rigol brand. I have been doing a lot of researching and so far i am impressed with the specs and the current hardware quality of the DS2027 based off Daves tear down video and other peoples comments; but I don't know what to think of the product in terms of Software.
It appears that the computer software isn't as nice as some of the competitors and watching your most recent video Dave, it does seem like there are some firmware bugs that still need to be worked out.
However I do like that fact that it does have the 8.5" screen, Trigger on Serial data, 2GSPS, 14MPT memory, 500uV/Div range and the record/playback function.
I also like the fact that the standard scope probes are relatively cheap in case replacements are needed.
The other model I am looking at due to my budget is the Agilent DSO1072B, it has the same bandwidth but 1GSPS and only 16K memory. From my experience the Agilent software is spot on and the products has a good reputation.
What I like about the Agilent is the waveform Zoom Simultaneously feature along with the look and feel of the product I also like the Waveform math and FFT feature.
Does the Agilent offer a record/playback feature? Would that be apart of the "Sequence mode for easier debug" feature that they have mentioned?
I would consider the DSOX2002A series which has the 2GPS, 8.5" screen and 100Kpt memory but that is out of my price range ad an additional $200+ I know you can get the function generator feature also but unfortunately I have to draw the line somewhere and that is at the $1000 mark.
Even though I am not overly concerned the overall size. Would the size of the Rigol be noticeable on a small work bench? As my work bench is relatively small it is something I should consider but is of low priority.
What are peoples opinions on the quality of the Rigol scope probes vs Agilent scope probes is there a quality difference?
Aside from the spec difference between the DS2027 and the DSO1072B how do you guys think the features of the two will compare? are there any features that the Agilent will have that the Rigol wont?
Thanks in advance for all your input/opinions I really appreciate any feed.
Jeff
I was looking at the DS1102E but I was under the impression that it was a few years old and was hoping for something which had been released fairly recently. I also heard that it has issues with fan noise.
What are the scope probes like? Do they seem like decent quality?
He also indicated that he is not aware of any firmware revisions to the scope as of this moment, but promised to look into it further. I'm hoping this isn't a glimpse of what there is to come over the horizon, i.e.: difficult to obtain firmware updates. No offense to Dave, but some of us don't carry the weight to get noticed, scoring none milestone revision or test firmware.
Hasn't Agilent stopped doing the customer activated bandwidth upgrades? I thought I heard they were stopping last month and it would require the unit to be returned to Agilent...just rumor... might be totally false. (Referring to the DSOX2k and 3k).
I'm not getting my firmware direct from Rigol, nor am I requesting it, or even in contact with them about it.
The firmware I got was asked for and requested by the local Oz rep John South from Emona on his own accord.
Yes, Rigol really need to fix their attitude toward firmware updates, they are very quickly getting a bad rep for it,
But isn't that exactly the problem the rest of us, the unwashed masses without the publicity, have? "We" have no one pro-actively requesting firmware updates for us. No one in the supply chain has an incentive to do that for "us".