[time-nuts] USB over optical fiber

[David Van Horn]

I'm not too worried up there, my receivers are working at 457 kHz. 

-----Original Message-----
From: Scott McGrath <scmcgrath at gmail.com> 
Sent: Wednesday, December 4, 2019 12:14 AM
To: Discussion of precise time and frequency measurement <time-nuts at lists.febo.com>
Cc: David Van Horn <david.vanhorn at backcountryaccess.com>
Subject: Re: [time-nuts] USB over optical fiber

Its not so much the noise from the interface its the USB device itself i’d worry about as USB 3.0 generates RF signals up to 3 GHz.   And also has fairly strong signals in the 2.4 GHz ISM band.

Content by Scott
Typos by Siri

> On Dec 4, 2019, at 12:07 AM, David Van Horn via time-nuts <time-nuts at lists.febo.com> wrote:
> 

I suppose this is vaguely time-nutty. 😊

I have an application where I need to take USB into an EMC faraday cage.
I see a number of optical fiber implementations available, and the prices ($200-300) are acceptable, but I’m worried about noise that the downstream end may cause, since it will need to be inside the cage.

Does anyone have experience with these?  Ones to stay away from?



--
David VanHorn
Lead Hardware Engineer

Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO  80301 USA
phone: 303-417-1345  x110
email: david.vanhorn at backcountryaccess.com<mailto:david.vanhorn at backcountryaccess.com>

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