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| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
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| marmad:
So yesterday I got prematurely excited during testing because I thought that Anti-Aliasing was actually working when Memory Depth was set to AUTO - but it turns out not to be true. :( It did get me thinking about it though: Normally when you set Memory Depth to AUTO, the DSO automatically adjusts the sample size (up to 14M) to keep the sample rate as high as possible (with just enough samples needed to fill the horizontal scale [time base x 14]). But why doesn't Rigol write a new FW routine which has a different behavior for when both AUTO and ANTI-ALIASING are on? Instead of changing the block sample size or rate, the routine would keep the sample rate fixed @ 2GSa/s - and just achieve the necessary sample size for the display by random decimation (i.e. stochastic sampling). This would allow users to use anti-aliasing while probing unknown signals - then if deeper sampling of a certain time base is desired, simply turning off ANTI-ALIASING will cause the DSO to fall back into normal AUTO mode. To me, it seems pretty easy to implement - certainly no more difficult than HIGH-RES mode, or a number of other post-processing techniques they use. |
| Carrington:
--- Quote from: marmad on July 11, 2013, 02:25:25 pm ---To me, it seems pretty easy to implement - certainly no more difficult than HIGH-RES mode, or a number of other post-processing techniques they use. --- End quote --- I hope that RIGOL consider it. They could also add decoders CAN and LIN. Note: With serial number: DS2A1516xxxxx, continue with probes RP3300. |
| marmad:
--- Quote from: Carrington on July 11, 2013, 02:32:22 pm ---I hope that RIGOL consider it. They could also add decoders CAN and LIN. --- End quote --- I'm afraid that those decoders are something that they might consider as product differentiation between the DS2000 and DS4000 series. CAN and LIN are also not offered in the new DS1000Z series. |
| Carrington:
Well, a PC application solves this problem. :) Like a translator to OLS-client. |
| Galaxyrise:
--- Quote from: marmad on July 11, 2013, 02:25:25 pm ---But why doesn't Rigol write a new FW routine which has a different behavior for when both AUTO and ANTI-ALIASING are on? To me, it seems pretty easy to implement - certainly no more difficult than HIGH-RES mode, or a number of other post-processing techniques they use. --- End quote --- Do you have any picture evidence that the DS2000 is capable of oversampling? My first couple of attempts at this seemed to indicate otherwise (which is what I was complaining about a dozen pages ago) but I haven't spent the time yet to thoroughly convince myself of it. If the DS2000 can only process what makes it to sample memory, then the anti-aliasing you want is simply not possible. |
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