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| Pocket-Sized 6 GHz 1 TS/s ET Scope |
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| SJL-Instruments:
--- Quote from: joeqsmith on February 16, 2024, 04:45:51 am ---Job well done! It ran all night without any further problems. I also ran some other basic checks using your software as well as mine and it all seems to work. With the software and firmware shaping up, the only thing missing now is those 5X probes. ;) We can always revisit that. Looks like no one had anything specific they wanted to see during the review. My plan is to finish up this weekend and let you get back to your normal routine. :-DD Again, good job. You have made a lot of progress over this last month. --- End quote --- Thanks for the update, and glad the patch has resolved the problems. :) We are continuing to test the firmware on several units. If all goes well, we will release it sometime next week. |
| joeqsmith:
As promised, I provided a preview of my review to SJL, but we ran into small setback when looking at eye diagrams. I had previously posted some data and it was suggested I increase the intensity to get a better view of what the eye looks like: https://www.eevblog.com/forum/testgear/pocket-sized-6-ghz-1-tss-et-scope/msg5301991/#msg5301991 Even back then, then you can see that the eye diagram isn't all that easy to see what is happening. The attached image is showing a similar setup using the latest software. With the advanced user settings I can attempt to increase the number if data points to add more detail to the eye, but the software errors out. It seems that it limits the maximum data points to 3072. It's a PC with basically unlimited resources. Why is there such a limit? I can certainly change that part of the review but the software really needs some improvements to better show the eye, before going ahead with it. Once we have this sorted out, we can go ahead and release the review. |
| nctnico:
Color grading would be much better. The worse thing about intensity grading is that you are typically interested in the parts of the signal which occur the least. At low (or near zero) intensity, that information is not visible. Some oscilloscopes (like the ones from R&S) even have reverse intensity grading which highlights the rarely occuring waveforms. |
| joeqsmith:
Color grading would be nice. Of course, a lot of features, like changing the horizontal axis from time to distance would also be nice to have. The attached screen shot was taken from the following PicoTech 9400 sampling scope training class: https://eltesta.com/wp-content/uploads/2010/05/2010.07.01-Sampling-Oscilloscope-Training.-Munchen-Olympic-Tower.pdf Note the several display styles they offer, Dots, Vectors, Variable Persistence..... I don't think anyone would suggest the software is polished. However, I thought based on the following that they felt it was good enough and to drive the stake into the ground and move ahead. Which is what I did. --- Quote from: SJL-Instruments on February 11, 2024, 04:32:52 am ---You should review the product as it exists now. --- End quote --- For now, I will hold off with the review until they decide what they want to do. *** Using the power user mode to zoom in as much as possible and using the Light Mode and disabling vector trace mode for all channels. This is about the best contrast I can get. |
| SJL-Instruments:
--- Quote from: joeqsmith on February 17, 2024, 06:25:53 pm ---It seems that it limits the maximum data points to 3072. It's a PC with basically unlimited resources. Why is there such a limit? --- End quote --- Currently this is due to the way some algorithms (e.g. histograms) and display (e.g. OpenGL buffer size) are implemented. This limit can be drastically improved (to the ~million scale); it's just a matter of priority, and putting the work in. We can have it in by next update if you find it important. --- Quote from: nctnico on February 17, 2024, 07:02:07 pm ---Color grading would be much better. The worse thing about intensity grading is that you are typically interested in the parts of the signal which occur the least. At low (or near zero) intensity, that information is not visible. Some oscilloscopes (like the ones from R&S) even have reverse intensity grading which highlights the rarely occuring waveforms. --- End quote --- --- Quote from: joeqsmith on February 17, 2024, 08:37:10 pm ---Color grading would be nice. Of course, a lot of features, like changing the horizontal axis from time to distance would also be nice to have. The attached screen shot was taken from the following PicoTech 9400 sampling scope training class: https://eltesta.com/wp-content/uploads/2010/05/2010.07.01-Sampling-Oscilloscope-Training.-Munchen-Olympic-Tower.pdf Note the several display styles they offer, Dots, Vectors, Variable Persistence..... I don't think anyone would suggest the software is polished. However, I thought based on the following that they felt it was good enough and to drive the stake into the ground and move ahead. Which is what I did. Using the power user mode to zoom in as much as possible and using the Light Mode and disabling vector trace mode for all channels. This is about the best contrast I can get. --- End quote --- Here is a prerelease version that significantly increases the range of the brightness slider, and adds color-grading: https://gigawave-releases.s3.us-east-2.amazonaws.com/GigaWave_v2.5.10_PREVIEW_2022-02-17_Windows.zip The scale of the color-grading (if enabled) can be controlled by the brightness slider. When using very high intensity settings, there may be speckles within the open eye due to statistical noise in the CDF samples. These will reduce as the minimum number of triggers per CDF sample (Section 3.7.1) is increased. Note that we are nominally out of office this weekend. But this was a small enough change, and is holding up the review. --- Quote from: joeqsmith on February 17, 2024, 08:37:10 pm --- --- Quote from: SJL-Instruments on February 11, 2024, 04:32:52 am ---You should review the product as it exists now. --- End quote --- For now, I will hold off with the review until they decide what they want to do. --- End quote --- We stand by this statement for 99% of the review - the product will continue to improve for the foreseeable future, and so any review must necessarily be a snapshot. We singled out the eye diagram issue since it's one of the main target applications (signal integrity), and is being held up by a UI limitation. The cost-benefit tradeoff makes this point a bit silly not to address. Overall, we found the review fair and very thorough. If the UI patch resolves the issue, we're happy for it to be published. |
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