Nikon D7100 Using Powered Usb Hub And Long Extensions

[menardre]

I had a chance this morning to test BYN in my observatory. I have a laptop (Windows 7) that runs all of my equipment through a powered USB hub. The USB cable from the laptop to the USB HUB is fairly long (over 10ft). I connected my D7100 to the USB HUB and turned on BYN. It immediately recognized the D7100 (I had the SD cards removed). I tried several different types of exposures, and focus framing with no problems. So far BYN seems to be a real winner.

Roger

[admin]

Hi Roger,

 

You should be fine with a 10 feet USB cable.

 

Regards,

[blndarcher]

What do you think the limit might be?

[admin]

Any longer than 10 feet I always use an active repeater cable.

[s3igell]

What do you think the limit might be?

The USB2 Standard lists a Cable Length Limit of 5 meters (16ft 5in) - using High Quality Cabling (of course).

The USB3 Standard is less - 3 meters (9ft 10in).

 

At lengths greater than these, one needs Cables with built-in Active Repeaters.  Good Quality Active Repeater Cables have one Repeater embedded every 15ft for a max of 75ft (4 Active Repeaters).  Such cables NEED a Powered Hub at the End, as each Repeater consumes both Power and a Device Count from the Source End of the Cable (many Active Repeaters are implemented as 1-Port Hubs, counting against the 5-Hub-Tiers USB Network limit - possibly over-extended if the Host PC implements an Internal Hub between the Root-Hub I/O Chip and the External Connector).  But, this becomes its own Topic...