Maybe this will help some people figuring out issues they may have, similar to mine.
Issues, that repeat itself or happens periodically (and drives me insane) :
- Camera won't turn on (lot's of disconnecting/connecting to get a screen)
- Camera doesn't run right, runs with errors, cooling isn't running right or PC can't find the camera.
- Imaging software like Sharpcap or APT etc. hangs or freezes or crashes.
- Mouse stops working
- Keyboard stops working
- One or more USB device disconnects unexpectedly
- The mount is "jumpy" while slewing with EQMOD or Stellarium, etc.
- The guiding is less than spectacular (pulses sent to the mount too small or too large, making it over or under correct)
All of the above happened to me at every single time, whether it was one of those, or more of a combination of those issues.
My once upon a time gaming desktop just can't handle it, and all those USB connections are an overkill. (mount+guidecam+cmos color cam+keyboard+mouse+usb wifi dongle)
It used to be a pre-built "gaming" rig in its day and was actually quite expensive back then.
It's an i7-2600 CPU 3.40GHz with 12GB of whatever-sticks- I- found -cheap- memory.
Sounds powerful but that CPU is from 2011.
Here is where I tracked down my issues.
It's 6 USB connections and they are all USB 2.0 and also the power supply of the PC is 280 or 300 Watts.
USB speed matters a lot. Especially if the devices are large bandwidth data transfer, such as images or video.
(USB 2.0 transfer speed is 480 megabits per second (Mbps), while USB 3.0 transfer speed is 4,800 Mbps. This means USB 3.0 is approximately 10 times faster than USB 2.0.
More recently, USB 3.1 has also been released and has a data transfer rate of 10,000 Mbps.)
Note: Both of my cameras are USB 3.0 and both require USB 3 connections for optimal functionality.
I also have to mention, that dedicated astro cameras are drawing more current and sending more data than DSLRs, since the CMOS cameras are constantly looping video as soon as you plug them in, while DSLRs only transmitting when they are in "live view" or just after taking an image.
Also to be noted, USB speed is worthless if the CPU/Video device can't handle the tasks and the Hard drive isn't fast enough with its read/write specs.
Also speed comes with a price that they require more voltage through the cable.
Having the keyboard; mouse; 2 cameras; USB wifi dongle; Telescope mount - all USB connected to USB 2.0 ports, not to mention the desktops' power supply is 300W and the hard drive I'm saving my subs are an HDD,
I think it's quite obvious what's wrong.
My options are- Buy or build a PC with USB 3.0 or 3.1 connections.
Buy a powerful laptop with plenty of USB connections. Gaming laptops have them, while the generic mainstream ones are leaving behind the USB plugs, which really bothers me, because they are going for style over purpose and functionality- copying Apple.
I also have to reduce my USB clutter, although the wifi/ mouse/keyboard solve themselves if I'd buy powerful laptop, that's 3 USB down.
A modern PC should be able to handle 3-4 devices plugged in, even if they high volume data transfer.
I'm leaning towards the laptop, but since very powerful laptops are 2x 3x the price of a similar spec desktop, I feel like crying while browsing the web for a system.
Anyway, I'm just writing down in case someone else have random issues and can't track down what's causing it.
Edited by unimatrix0, 28 February 2021 - 02:21 AM.