[ntp:hackers] Question about USB3... anyone played with it?
Gary E. Miller
gem at rellim.com
Wed Dec 11 20:00:14 UTC 2013
Yo Greg!
On Wed, 11 Dec 2013 14:52:43 -0500
Greg Troxel <gdt at ir.bbn.com> wrote:
> TSG - personal <tglassey at earthlink.net> writes:
>
> > We all know USB2 is horrible for 1PPS - how about USB3?
>
> I have a GR601-W, which seems to have a 1ms variation.
Yeah, can't call that horrible, that is better than you'll get
on GigE sitting next to a Stratum 1.
> I am pretty
> sure it's a USB1 device.
The GR-601W is USB 1.1
> I am unaware of any USB2 devices for time,
> let alone USB3. Can you point to USB2 devices?
I have a USB 2 serial adapter: C232HM. I plane to hook it up to a
serial GPS w/ PPS to see what happens, but is a bit down my todo list.
Beyond that I know of know other USB 2 or USB 3 solutions or kludges.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
gem at rellim.com Tel:+1(541)382-8588
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