[time-nuts] Linux PPS clues?
info at iliaplatone.com
Thu Oct 20 04:15:03 EDT 2016
Thank you Attila :)
Actually the system for timestamping is at design stage yet.
I expect an event rate of about 100kcps, but I found little infos about
the bandwidth variable for the receivers.
Since I don't want to fill in the list with off-topic posts, just limit
in time-related quests.
There's not any problem for the board I'll use, I referenced the
raspberry because it's well known. My questions are for the software
side and relative efficiency of the system.
On 10/20/16 08:01, Attila Kinali wrote:
> On Thu, 20 Oct 2016 07:52:10 +0000
> Ilia Platone <info at iliaplatone.com> wrote:
>> I quickly read the gpsd howto and it explains what I want to do using
>> kpps on a raspberry. From there I can see a typical accuracy of 1uS, but
>> the informations of the live graphs page are precise down to the ns: are
>> these averaged?
>> What do you intend for granularity? Consider that I'm a newbie in
>> frequency/time specific terms.
> If you are still going for the synchronization of telescopes, then
> you definitly don't want a rpi. Go for one of the more industrial
> oriented boards (the original rpi is basically just a graphics card with
> an attached arm processor as USB controller). Like the beaglebone,
> or probably even better for the Vybrid based boards (Colibry family)
> from Toradex (has less EMI noise than the BBB).
> Attila Kinali
via Ferrara 54
Cattolica (RN), Italy
Cell +39 349 1075999
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