PPS over USB

[Hal Murray]

gem at rellim.com said:
>> PPS over USB will be more accurate with a fudge factor.
> Gack, no.  The USB delay is much less than the sample interval on the USB
> 1.1 bus. 

I don't understand what you are trying to say.

PPS over USB will be off on average of 1/2 the polling interval.  It's easy 
to see if you have a decent place to stand.  In some sense, it's not a big 
deal.  On the other, it's a systematic error so it's silly not to document 
the fix, especially in a document that is mostly cut-n-paste.

Eric: Please plug your 701W into your Pi with HAT and collect some data.



-- 
These are my opinions.  I hate spam.