On 01/02/2017 11:40, David Taylor wrote:
On 01/02/2017 05:55, sean wrote:

...

What will be good enough depends on your needs.  The lowest cost might
be the Sure board attached to an existing FreeBSD box, running 24 x 7
and in as stable a thermal environment as necessary.  Both the Raspberry
Pi and BeagleBone Black are low-power devices and therefore low-cost to
run 24 x 7, with the BBB having a slightly better Ethernet
implementation if you need to get down to the tens of microseconds
level, but with the Raspberry Pi have a much wider support even though
it might offer (approx) fifties of microseconds.  Judge for yourself here:

  http://www.satsignal.eu/ntp/BBB-vs-RPi.html

If you already have an RPi doing something, adding a NTP server to its
tasks will make little extra load for an environment with a thousand or
more clients....


As I am looking at the BBB myself, here are some extra questions:

1. Do you know if anyone has tried using the real-time coprocessors on
  the BBB to more accurately track the PPS signal?

2. I presume the BBB could be put in a shielded case (I see some
  offered online).  Any experience with that?

Enjoy

Jakob
--
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
This public discussion message is non-binding and may contain errors.
WiseMo - Remote Service Management for PCs, Phones and Embedded

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