Re: Which Camera?
On 7/4/2021 1:42 AM, Jeffc wrote:
The cable that ships with the QHY268M is so-so ok [...] FindingThat reminds me....
In 2019 I had a serious problem with my ZWO ASI1600MC Pro hanging-up and not downloading an image. It even went back to China for an engineer to check out.
(Nothing was wrong with the camera; the problem turned out to be a USB webcam I was using to view the observatory was hogging the USB traffic on the PC, even though it was USB 2, and the '1600 was USB 3. When I disconnected the webcam, the '1600 worked perfectly.)
BUT, in my extensive email conversation with Chad, the ZWO engineer in China, he mentioned that many USB 3 cables are of inferior quality, and the flat cable they provide is the only one they can confirm works with their cameras. IOW his first suspect was the USB 3 cable to the camera.
Chad also told me that powered USB 3.0 extenders often cause problems, and he recommended using only a high-quality brand-name extender. I have a Plugable no. USB3-5M-D: <https://www.ebay.com/itm/264095004596> (This is an eBay link, but the vendor is Plugable itself.)
Bottom line.... Even though my camera's problem was caused by a USB 2 webcam, I learned a lot about USB 3 cables and active extenders from an engineer with experience with them.
BTW, I am extremely impressed with ZWO's support in resolving this issue. Chad was quite knowledgeable and responded to my emails quickly (12-hour time difference, so I usually had an answer to an 11pm email when I woke up the next morning).
Chad convinced me to send the '1600 to him (via the dealer), and he personally performed the tests (including in hot and cold chambers), then told me the results (nothing wrong). He shipped the camera back to me directly at no charge.
That's what I know about USB cables and ZWO cameras, and ZWO customer support.