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| Waveforms/second in Siglent and other scopes -- limits due to capture handling |
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| nctnico:
--- Quote from: 2N3055 on June 18, 2024, 09:34:07 am --- --- Quote from: nctnico on June 11, 2024, 11:04:42 pm ---One thing you need to keep in mind is that history mode is often of limited use... --- End quote --- To you buddy. To you. --- End quote --- You are stuck in dealing with repetitive signals while overlooking the fact that when dealing with circuits containing a microcontroller or other digitial chips, things happen in a sequence which can span many seconds. A very nifty feature of my Tektronix logic analyser is the ability to do segmented recording but contrary to a DSO, it will show the segments on a single timeline (*) instead of overlapped on top of eachother. I don't recall a DSO which can show the recorded segments on a single timeline. This would be extremely handy for dealing with sequential events. Keysight allowing to show protocol decoding results across all segments is the feature which comes closest to having segments on a single timeline that I have seen on a DSO. When using a DSO I typically use roll-mode for looking at sequential events but the samplerate becomes very low and details may be lost (which then need to be measured seperately and thus taking more time). * The user has a choice to show the dead-time between the segments or just stick the segments together. However, cursors will still show the correct relative time. |
| 2N3055:
--- Quote from: nctnico on June 21, 2024, 09:44:39 am --- --- Quote from: 2N3055 on June 18, 2024, 09:34:07 am --- --- Quote from: nctnico on June 11, 2024, 11:04:42 pm ---One thing you need to keep in mind is that history mode is often of limited use... --- End quote --- To you buddy. To you. --- End quote --- You are stuck in dealing with repetitive signals while overlooking the fact that when dealing with circuits containing a microcontroller or other digitial chips, things happen in a sequence which can span many seconds. A very nifty feature of my Tektronix logic analyser is the ability to do segmented recording but contrary to a DSO, it will show the segments on a single timeline (*) instead of overlapping on top. I don't recall a DSO which can show the recorded segments on a single timeline. This would be extremely handy for dealing with sequential events. Keysight allowing to show protocol decoding results across all segments is the feature which comes closest to having segments on a single timeline that I have seen on a DSO. When using a DSO I typically use roll-mode for looking at sequential events but the samplerate becomes very low and details may be lost (which then need to be measured seperately and thus taking more time). * The user has a choice to show the dead-time between the segments or just stick the segments together. However, cursors will still show the correct relative time. --- End quote --- Me stuck? LOL, that's rich coming from you ... Scope is not one show pony. It has to be useful for repetitive and non repetitive signals, slow and fast ones, etc etc... Showing segmented captures in single timeline is just display mode. Where if you have short packets coming in slowly, you get huge "NIL to data" ratios and display that is practically useless. But that kind of display is possible with today's scopes... You show packet, than bunch of placeholder space saying "BLANK" and another packet and so on. It might even be useful as an sort of overview window.... Like the overview window in zoom.. Decoding across the segments is something I said is useful before you (I have both Picoscope and Keysight, unlike you) and not in the slightest connected with this discussion. Truth is OP sees one thing he/she/it does and would like scope specifically tailored for that. Same as you. So you sympathise with OP. Except you are reasonable, for you simply a scope that has huge memory that can be fixed separate from timebase and that decodes from whole memory regardless of timebase is a winning combination. Fact that I disagree with you as to that is the only way to achieve that goal, does not distract from the fact that what you want is not unreasonable as it is achievable with today's technology and in fact there are scopes out there that can do it. So I really don't understand what your comment has to do with OP "new way that scope would work". Read carefully what he proposes and you will see that it is ether not a solution to anything, not possible, or as we start asking how to deal with real life examples his answers start converging to fact that he would like a scope with unlimited memory, with segmentation and zero retrigger time, that processes 160GBytes/s in real time for screen, math measurements, masks, counter, etc etc....... And I say to you same as I said him: take a pencil and piece of paper and start sketching HOW you would achieve that. Hint? You won't. |
| nctnico:
--- Quote from: 2N3055 on June 21, 2024, 10:16:15 am ---And I say to you same as I said him: take a pencil and piece of paper and start sketching HOW you would achieve that. Hint? You won't. --- End quote --- The answer is actually in your face. Look at my avatar picture. That is a USB oscilloscope protoype with 1Gpts/channel (assuming a big enough memory module is fitted) I designed about 20 years ago. Nowadays the amount of memory can easely be a multitude of that using the same concept. Once again, I'm not trying to take anything away. Just add more features. I don't understand how more features can ever be bad. |
| 2N3055:
--- Quote from: nctnico on June 21, 2024, 10:29:27 am --- --- Quote from: 2N3055 on June 21, 2024, 10:16:15 am ---And I say to you same as I said him: take a pencil and piece of paper and start sketching HOW you would achieve that. Hint? You won't. --- End quote --- The answer is actually in your face. Look at my avatar picture. That is a USB oscilloscope protoype with 1Gpts/channel (assuming a big enough memory module is fitted) I designed about 20 years ago. Nowadays the amount of memory can easely be a multitude of that using the same concept. Once again, I'm not trying to take anything away from. Just add more features. I don't understand how more features can ever be bad. --- End quote --- I know what you designed. It has nothing to do with what OP speaks about. Nobody said your design wasn't good. I said try to sketch what HE proposes. Not that you cannot design classic scope of your own design. |
| kcbrown:
--- Quote from: tautech on June 21, 2024, 08:46:17 am ---I believe this is based on your experiences with SDS2000X Plus KC ? Not all Siglent models manage memory and captures in the same way as they do....but can. Eg, Zoom out of a capture is not a problem for some models. --- End quote --- Right, I realize that the latest models allow for greater flexibility in the capture definition, thus allowing a zoom out. Hopefully my next write-up on this will bring clarity to my thinking here. |
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