[time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards
hmurray at megapathdsl.net
Thu Feb 16 16:00:27 EST 2017
shouldbeq931 at gmail.com said:
> I run PTP on a Raspberry Pi using its onboard USB connected NIC, and onboard
> NICs on HP and Dell servers, I see +- 5 microsoconds jitter in the one way
> delay across 4 fanless HP switches, ...
Could you please say more?
USB 2 has a 125 microsecond polling interval. Is that averaging over a
batch? If so, how many? ...
Have you seen any hanging bridges?
These are my opinions. I hate spam.
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