Originally Posted by Bassnut
Im guessing a subframe like this is required for any fast AO. SX must have a way of doing this somehow, do they mention that on there site, or in the manual?.
When I have it working in DL I can't see why not but I have some drivers issues with DL and the AO at the moment.
Well last night I finally got a good run and everything worked as intended.
I got the AO/Lodestar working on one hub and guided the scope with PHD/QHY5 on a separate hub, same laptop. All worked together fine. Did a couple of test fields and stars were nice and round(ish). Still some camera tilt and minor collimation issues.
Couple of things I gathered along the way that might be of interest to other users about USB cables, Hubs, etc... I did some speed measurements so here it goes:
1_ USB hubs powered or unpowered don't seem to have an effect on data transfer speed. The only issue is if a device down the chain is power hungry but most cameras have a separate power supply and guiders don't need much to run. A 4 port hub's fine. Haven't tested on a 7 port hub. Might need to be powered.
2_ Cable length and quality do have a major impact on USB speed. Two cables might look similar and be branded USB2.0 but when you actually time the amount of data going through you'll see difference up to 20% improvement on a good quality shielded USB cable. So don't skimp on cable quality. Spend the money there, no on the hub.
3_ USB active cables tend to conflict with other devices when plugged in a hub. Passive cables don't. Took me a while to figure out but active cables when first plugged in are detected by the OS as USB device and drivers are installed. A passive cable will plug outright just as a connector with no bells and chimes. Might be why there's no conflict.
4_ Active USB cables have less packets drop out when talking to serial devices via USB to serial adapters. On inititial connection as well. So that's why maybe it's best to use an active cable over long distances.