Hello all, I'm playing around with an NTP server using a Blackfin processor and uClinux, and a Oncore M12M-Timing. The board is our H8606, http://www.hvsistemas.com/en/prod/H8606.html , with the standard crystal oscillator replaced with a FOX924B TCXO, http://www.foxonline.com/pdfs/fox924.pdf . I've modified the kernel to support PPS from the Oncore, with timestamping done through the processor NMI and the cycles registers, yielding a 2.5ns resolution, and the preliminary observed jitter in the timestamping seems better than ±25ns (previous to applying Oncore sawtooth correction). So until now, it seems quite good :).
I was thinking if the Allan intercept parameter of the ntp daemon could be optimized for this situation, since it has a default of 1500s that I suppose that is the adequate value for general usage (synchronization of a rather crappy computer oscillator from a WAN with quite spaced pollings and relatively high delays), and I presume that could be reduced for this system. Any thoughs would be appreciated :) Best regards, Javier -- ------------------------------------------------------------------------ Javier Herrero EMAIL: [EMAIL PROTECTED] HV Sistemas S.L. PHONE: +34 949 336 806 Los Charcones, 17A FAX: +34 949 336 792 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
