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 Post Posted: Sun Sep 24, 2017 4:12 pm 
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I'm using an ASI071MC-cool. A 25' USB 3.0 repeater cable from a USB 3.0 TrendNet ExpresCard
I'm using Astro Photography Tool and SGPro.
If I set image time for anything less than 1 second the image will not download just hangs.
Does anyone have any suggestions.
I have changed cables, removed the USB 3 powered hub from the loop.
This has been an issue doing Flats
Thanks,
Paul


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 Post Posted: Mon Sep 25, 2017 9:03 am 
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Hi Paul,
Your situation is normal.
If you want exposure time less than 1s and transmit stability, you must use a shorter cable.
When exposure time is greater than 1s, we will enable a wait mode in our camera. This means that we will wait for data before transmission. If image time less than 1s, we will close this mode, Because it takes too long, and affect the frame rate.
For a long cable, the transmission is unstable. the wait mode has some effect on solving the problem. If close the wait mode, the transport will go wrong.
Beside, In the USB3.0 specification, the maximum transmission distance is 5m. even 5m requires a very good cable. So we really can't guarantee the results of such a long cable.
Best Regards
chad

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 Post Posted: Mon Sep 25, 2017 11:18 pm 
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Thanks Chad,
I am using a good repeater cable, but understand the issue.
Can the wait mode be changed, or is it factory set?
Paul


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 Post Posted: Tue Sep 26, 2017 7:38 am 
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Hi Paul,
As you know, long exposure and short exposure is different. And we use different exposure strategies in different exposure modes. The wait mode is one of the patterns that needs to be used in the long exposure strategy. So you can not change the wait mode, it is used inside our camera.
Thanks
chad

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 Post Posted: Thu Oct 05, 2017 3:24 am 
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you can try to turn down "USB Limit" to check if it works

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 Post Posted: Mon Oct 16, 2017 8:30 pm 
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While I understand that you're trying to avoid adding communications overhead, I don't buy that it's just cable length related. I had this problem with the factory cable on the ASI290MC and the ASCOM driver I reported in another thread. My only solution was to fall back to USB 2.0 speeds. Not sure why I bothered with a USB 3.0 camera if it can't work in all modes.

Beo

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 Post Posted: Tue Oct 17, 2017 6:30 am 
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Hi Beo,
Please give me a detailed description of your problem and the link address which you reported. I will analyze your question there and give an answer.
Thanks
chad

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 Post Posted: Tue Oct 17, 2017 9:04 pm 
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Hi Chad,

I had two different threads where I was describing what I'm trying and where I was having problems both with ASCOM and DirectShow.

viewtopic.php?f=29&t=7295
viewtopic.php?f=21&t=7417

At this point I've just about given up on iSpy and the DirectShow driver. The crash is occurring too deeply in the OS to even run the debugger on it. For ASCOM I've been trying to work with Michael Poelzl's AllSkEye. It's exhibiting the same deBayering issue reported in one of the previous threads that he's traced to missing line(s) from the downloaded stream. You can read more about those and other issues at https://groups.yahoo.com/neo/groups/all ... s/messages.

One thing that would be of great help to using AllSkEye would be if the ASCOM driver had an option to apply the same sort of auto exposure and gain control that the DirectShow driver does. Currently AllSkEye only does exposure control and thus without gain control cannot cover the dynamic range change needed between day and night.

Thanks,

Beo

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 Post Posted: Wed Oct 18, 2017 1:57 am 
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Hi Beo,
Thank you very much for choosing our products. We are sorry for the problems you have met.
I will follow this issue in this thread:
Strike 2 on ASI290MC
viewtopic.php?f=21&t=7417
Thanks
Beo

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