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| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
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| Harvs:
--- Quote from: devitrify on June 13, 2013, 12:42:07 am ---I hope to use the decoding functions for our CAN bus, and I am pleased to see some great demos of this capability already posted. --- End quote --- How do you plan on doing that? As far as I know the CAN bus decoder is only available for the DS6000 scopes (and costs almost as much as a DS2072!) |
| devitrify:
--- Quote from: Harvs on June 13, 2013, 01:58:51 am --- --- Quote from: devitrify on June 13, 2013, 12:42:07 am ---I hope to use the decoding functions for our CAN bus, and I am pleased to see some great demos of this capability already posted. --- End quote --- How do you plan on doing that? As far as I know the CAN bus decoder is only available for the DS6000 scopes (and costs almost as much as a DS2072!) --- End quote --- Harvs, thanks for bringing to my attention my error regarding the CAN bus decoder. I've been viewing too many videos on Rigol scopes and didn't connect that the CAN bus decoding wasn't available on the DS2102. I guess I'll only be able to decode the I2C, which we haven't used on our robots as often. |
| devitrify:
--- Quote from: marmad on June 13, 2013, 01:14:15 am ---This bug was just introduced in the last version of the FW - and has already been fixed in the upcoming version. It is in our bug list on the opening page: --- End quote --- Marmed, I am happy to hear that the bug where data is duplicated in measurements is recent. Although I had seen it in your post, I thought it worth mentioning because I encountered it quickly when trying out the scope, and so it was one of my "First Impressions" -- the subject of this thread. I also thought it was a long standing uncorrected bug, so I'm glad to hear I am wrong on that. --- Quote from: marmad on June 13, 2013, 01:14:15 am --- --- Quote from: devitrify on June 13, 2013, 12:42:07 am ---Though maybe not a bug, I noted that when I download a waveform onto a USB drive, the resolution is reduced below that displayed on the scope. For example, at 2 V/div, the resolution in the downloaded file is 0.080V. For a full screen deflection of 16V (= 8 x 2V/div ), the # of steps is 200 ( =16V / 0.080V). I'll have to explore more to see if it is possible to download at higher resolutions. --- End quote --- I'm not sure exactly what you mean? What file format are you talking about? WFM? CSV? TRC? --- End quote --- The file format is CSV. Here is an excerpt after importing the CSV file into MS Excel and changing the number format from scientific to fixed point for readability: X CH1 CH2 Sequence Volt Volt 0 2.879 0.720 1 3.039 0.560 2 2.879 0.720 3 3.039 0.560 4 2.960 0.560 5 2.799 0.720 6 2.879 0.640 7 2.799 0.560 8 2.879 0.640 9 2.799 0.480 The waveforms were recorded at 2V/div. The minimum increment is 0.080V. When I plot this data in excel, I find the resulting data is heavily quantized, when compared to the original data that was displayed on the scope. I've attached the .BMP and .CSV files for comparison; (change .txt to .csv). I probably don't have an option for downloading to a file set correctly -- I have only a few hours experience with the scope. |
| Pinkus:
deleted - double posting - |
| Pinkus:
--- Quote from: Teneyes on June 13, 2013, 04:55:08 am ---Maybe Rigol will offer CAN decoding on the DS2000 later? --- End quote --- I don't think so. Probably the main firmware set is the same through all DS 2xxx/4xxx/6xxx series and they just enable/disable features (and changes regarding different hardware). By this the firmware development costs are shared through all scope lines and maintaining is much easier. As of marketing reasons they need to differentiate the misc. scope lines. The more expensive series will get more features then. If they would just enable all possible features in a DS2xxx series scope (e.g. allow 350 Mhz, allow CAN etc. which would not cost them anything but some time for testing), very few people would buy a DS4xxx or DS6xxx series scope. By this they would loose a lot of money. So, either 'somebody' find out how to enable this in the firmware (if the full code is there) or we will never see it - Rigol will definately not do this. And ... I am pretty sure Rigol people are reading this forum too, so they will (unfortunately) find a way to prevent this. |
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