[time-nuts] Raspberry Pi TCXO Hat

[Hal Murray]

rlaager at wiktel.com said:
> I'm curious if this would provide any meaningful improvement in system clock
> accuracy, for NTP, if I'm already a GPS PPS hat. If there's a reasonable
> chance this could be interesting, I'm thinking about ordering a couple and
> "sacrificing" a Pi 3 and/or Pi 4. 

What are your goals?  NTP server?  Neat graphs?

The Pi 3 has Ethernet on USB.  That adds a layer of jitter to packet timings 
so a Pi 3 even with GPS will never make a great NTP server.

How stable is your temperature?  Self heating as the CPU load changes is 
important even if the room temperature is stable.  A TCXO won't help if the 
temperature is already stable.

If you have 2 identical Pi-s, you could put the TCXO on one and run a 
side-by-side comparison and tell us what happens.


-- 
These are my opinions.  I hate spam.