[time-nuts] Synchronization

[Bob kb8tq]

Hi

One timing issue could be that USB is not that great for timing. Since it is 
packet based it introduces jitter in the link. Running NTP on a “traditional”
RPi is unlikely to produce numbers below a milisecond. 

Indeed I’m digging into that for what I’m working on …..

Bob

> On Dec 5, 2019, at 12:09 AM, Anton Strydom <agstrydom at gmail.com> wrote:
> 
> Good day Hal
> 
> Thank you for your contribution
> 
> The physical setup is as follows, each Rp1 has 2 or more cameras attached
> to it via a multiplexer or usb depending on the camera, there are a number
> of V2 RPi and also a couple of USB cameras attached to some of the RPi's.
> All the equipment is powered by solar
> 
> I will be able to run cable but it is going to be difficult plus the
> possibility that the cables and equipment attached to it will be stolen is
> 100% hence the WiFi
> 
> Yours sincerely
> 
> Anton
> 
> 
> 
> On Thu, Dec 5, 2019 at 3:01 AM Hal Murray <hmurray at megapathdsl.net> wrote:
> 
>> 
>> agstrydom at gmail.com said:
>>> The cameras are pairs sitting on a multiplexer so the problem is not the
>>> camera pair synchronization but the RPi synchronization
>> 
>> I don't understand the physical setup.  Is it possible to run a cable to
>> wherever you need good time?
>> 
>> Even if that isn't practical in the long run, it might be useful for
>> experimenting.
>> 
>> 
>> --
>> These are my opinions.  I hate spam.
>> 
>> 
>> 
>> 
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