Hi Some of the similar boards have *lots* of 0.5 Hz coming out on differential pairs. I suspect that the easy approach for NTP would be to hack the driver.
Bob On Sep 13, 2013, at 5:20 PM, Mark C. Stephens <[email protected]> wrote: > Typo - 0.5Hz, coming out of a 74AC74 driven by PAL. > Split off to front connector and "cellular interface" so there is 2 places to > pick of 0.5Hz. > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Iain Young > Sent: Saturday, 14 September 2013 5:12 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access > > Hi Mark > > On 13/09/13 13:26, Mark C. Stephens wrote: > >> One obvious use for the SCPI port could be for NTPD. >> The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for >> NTPD. > > 2Hz ? I thought it they were a pulse on the even second, thus actually > 0.5 Hz ? > > I wonder how the PPS Driver in NTP would react to that (either 2Hz, or 0.5Hz > pulses). I guess if it really is 2Hz, then one of Tom's PICs could be used to > drop it to 1 Hz > > But if it's 0.5 Hz, I wonder if a modification to the ATOM driver or > underlying PPS code would be needed > > Or is the 2Hz signal coming off the SCPI port ? > > > Iain (and yes, like others, I am interested) > > > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
