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| Pocket-Sized 6 GHz 1 TS/s ET Scope |
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| joeqsmith:
I recently made a review of lexmux's active probe and had used the GigaWave 6400 as part of the evaluation. https://www.eevblog.com/forum/testgear/12-ghz-active-probe-project/ I asked SJL about the status of the mid May firmware release. I was going to delay the review but it seems they have put this effort on hold. Apparently there was little interest in adding SCPI. Personally I agree with this. Currently they lost no backlog: Next update v2.6.6 - upon customer request. Backlog: - Clear for now. Email us for feature requests! - Debug touchpad on macOS Planned firmware v15: - Store jitter calibration in firmware, perform automatic jitter correction in software. - Allow user to specify max timeout for R command. - Bugfix: Setting low CDF tolerance leads to long response times. During the review, you can how I am saving the waveforms and recalling them for a reference. Something I commonly do when using a scope. Note the number of steps required. You have to manually select a file name, manually reload them, then manually set the gain and offset. I like the idea of having a memory rather than a file and having the software automatically show the data, properly scaled like my other scopes. The less buttons I need to press and typing I need to do, the better. Something you may want to consider with future releases. |
| KE5FX:
It did make a nice demo of the SJL scope. I was wondering why you were using the 600 MHz LeCroy in the early parts of the review, rather than the 5 GHz model, but then you broke out the GigaWave and it did a great job showing what was going on. |
| joeqsmith:
During the initial checkout where I wanted to see if it would even turn on, that scope is my daily driver so that is what was used. I thought about what to show for some time before I starting working on the review. It's really a bit of a crap shoot and why I had asked for input first. The video is biased towards digital because that would be my use case for a probe like this. I wanted to show that section of H Johnson's book as they do a good job showing why you may choose one probe type over another. I wanted to show some sort of comparison of slow and fast scopes, edge rates and probe combinations to give viewers some idea of what to expect under different conditions. I was going to use the WM but thought, why not show that GigaWave. It has a higher BW and is something anyone could go out and buy. Of course, you see the downsides like the slow update rate and software interface. The one thing I would have liked to have shown was that LeCroy active probe compared with the Lasmux product. But of course, being proprietary, there was no way to use it with the GigaWave. I also thought about showing it with a more modern digital logic to limit the output drive strength to better show the loading effects of the resistive probes. I also thought about showing the what the probe's see and comparing that. I figured I had shown the S-parameters and had already been babbling on for an hour and decided to call it a day. If there is enough interest in seeing other tests ran, I am certainly willing to set them. |
| SJL-Instruments:
--- Quote from: joeqsmith on May 25, 2024, 03:34:38 pm ---I recently made a review of lexmux's active probe and had used the GigaWave 6400 as part of the evaluation. https://www.eevblog.com/forum/testgear/12-ghz-active-probe-project/ --- End quote --- Just watched the review - impressive job by Lasmux. :) Loading and performance are outstanding for the price. We think the probe might make a good accessory for the GigaWave. We've contacted Lasmux about this - there should be some way to benefit everybody (including users/customers). --- Quote from: joeqsmith on May 25, 2024, 03:34:38 pm ---During the review, you can how I am saving the waveforms and recalling them for a reference. Something I commonly do when using a scope. Note the number of steps required. You have to manually select a file name, manually reload them, then manually set the gain and offset. I like the idea of having a memory rather than a file and having the software automatically show the data, properly scaled like my other scopes. The less buttons I need to press and typing I need to do, the better. Something you may want to consider with future releases. --- End quote --- Thanks for pointing this out - we will release an update with this feature by EOW. |
| joeqsmith:
Look forward to the software updates. --- Quote from: SJL-Instruments on May 26, 2024, 12:50:50 am ---Just watched the review - impressive job by Lasmux. :) Loading and performance are outstanding for the price. We think the probe might make a good accessory for the GigaWave. We've contacted Lasmux about this - there should be some way to benefit everybody (including users/customers). --- End quote --- Hopefully the two of you can work something out. Maybe you could even get Lasmux to make all of your probes. You mentioned your Z0 probe you were working on. One small thing, if you do work something out, it would be nice if the probe would interface directly with the scope without the need for adapters. |
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