Re: Accurately measuring clock drift
Rob Janssen <chrony-users-Cohe+2zZ/ftmR6Xm/[email protected]>
| Newsgroups | gmane.comp.time.chrony.user |
|---|---|
| Organization | PE1CHL |
| Message-ID | <[email protected]> |
On 6/21/23 13:53, Miroslav Lichvar wrote: > Intel I210 Ok I wasn't aware that this card could also input 1PPS signals, when reading about timestamping and network cards I immediately assumed the use with PTP. Unfortunately many older GPSDO output ridiculously short 1PPS pulses. We already have to devise something to make the pulse acceptable for RS232 DCD, and that is mostly for the same reasons. (I submitted a kernel patch for the serial port line discipline to allow shorter pulses, but it was rejected) Serial port is not an absolute requirement, it just would be convenient. A USB serial cable works as well (for monitoring of the GPSDO and receiving the absolute time info). At least this card has the price that we need... of course because it is a volume item. Rob -- To unsubscribe email chrony-users-request-kWFZVVI9zxvPqho9SqqRMmD2FQJk+8+b@public.gmane.org with "unsubscribe" in the subject. For help email chrony-users-request-kWFZVVI9zxvPqho9SqqRMmD2FQJk+8+b@public.gmane.org with "help" in the subject. Trouble? Email [email protected]