Hi The original post simply mentioned EBU. Thus the confusion.
Bob On Jul 11, 2010, at 8:23 AM, "Ed, k1ggi" <[email protected]> wrote: > Keep in mind, SMPTE/EBU is timecode, AES/EBU is digital audio. > 3 orders of magnitude difference in the bit rates. > Chris was talking timecode. > Ed > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Bob Camp > Sent: Friday, July 09, 2010 8:38 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] GPS Timing Source -- looking at buying > > Hi > > The Thunderbolt has a GPS and an OCXO inside it. It's built in smarts align > a PPS created from the OCXO to the GPS PPS. This allows the PPS to be more > stable than a normal GPS PPS (less jitter). It also provides holdover on the > PPS if and when GPS sat's are not available. > > Since your ultimate objective is (I think) AES / EBU timing, jitter is an > important consideration. > > Bob > > > On Jul 9, 2010, at 3:10 AM, Chris H wrote: > >> I might go for the Garmin one to start with, and see how it all works.. >> and then move up to a more reliable source of timing source in the >> future... >> >> When you say Reliable, what exactly do you all mean--- >> does it loose time? >> Does it loose lock to the satellites? >> because it's only millisecond accurate, is that your concerns.... >> >> Please correct me if I am wrong: >> >> If it's pulsing every second, and that second is generated by the lock >> to the satellite, then should it not be as accurate as the device that >> it's getting it's lock from? >> >> (Sorry I am new to all this) >> >> >> On Fri, 2010-07-09 at 19:02 +1200, Chris H wrote: >>> Yes sorry -- stratum 1 -- brain fart :( >>> >>> >>> >>> On Fri, 2010-07-09 at 06:32 +0000, Paul Nicholson wrote: >>>> Chris H wrote: >>>>> Would be good as a timing source for GPS >>>>> ... make a PC into a Stratum 0 timing device? >>>> >>>> I think it would count as stratum 1, since you are 1 hop >>>> away from a master time source. >>>> >>>> This page may be of interest, >>>> >>>> http://www.satsignal.eu/ntp/FreeBSD-GPS-PPS.htm >>>> >>>> Trimble Thunderbolts have been recommended on this list as a >>>> proper timing grade GPS, superior to these EOM Garmin GPS units. >>>> >>>> There's a reliable source of Thunderbolts on E-bay. I currently >>>> have one of these on order, >>>> >>>> http://cgi.ebay.co.uk/290322053618 >>>> -- >>>> Paul Nicholson >>>> -- >>>> >>>> >>>> _______________________________________________ >>>> 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. >> > > > _______________________________________________ > 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.
