13.5 and 27 MHz are usually associated with digital video. SD video with 720 x 576 has a pixel clock of 13.5 MHz, and the corresponding SDI bit clock is 270 MHz.
Cheers Stefan -----Ursprüngliche Nachricht----- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Brooke Clarke Gesendet: Donnerstag, 15. Dezember 2011 04:13 An: Discussion of precise time and frequency measurement Betreff: [time-nuts] Why these Crystal Frequencies? Hi Pete: Maybe you can shed some light on the common xtal frequencies table where there's no explanation given? http://www.prc68.com/I/pdf/Crystal_Freq.pdf An answer is not it's an "even" frequency or "it's an even binary frequency. That's true for most of these and the factors are part of the table above. The question is why do they exist? such as: 32.0 kHz 40.0 75.0 76.79 76.8 76.81 96.0 3.072 MHz 4.0 4.096 5.0 6.0 7.3729 8.0 8.192 9.8304 10.0 11.0 11.0592 11.2896 12.0 12.288 12.352 13.5 14.31818 15.36 16.0 16.384 17.734475 18.0 18.432 19.6608 19.44 22.1184 24.0 24.567 25.0 25.175 28.63636 30.0 1.4204058 GHz Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/Brooke4Congress.html Peter Bell wrote: > It's exactly 52 times the 1.2288MHz reference that IS95/CDMA2K uses - > this may be a coincidence, but I somehow doubt it. > > Regards, > > Pete > > > On Thu, Dec 15, 2011 at 3:46 AM, Joe Leikhim<jleik...@leikhim.com> wrote: >> I have been watching this thread and may have missed something. My >> questions: What is the purpose of the outboard OCXO VECTRON >> 63.8976Mhz? What model number does this RB most closely resemble? >> >> -- >> Joe Leikhim >> >> Leikhim and Associates >> Communications Consultants >> Oviedo, Florida >> >> www.Leikhim.com >> >> jleik...@leikhim.com >> >> 407-982-0446 >> >> Note to GMail Account users. Due to an abnormally high volume of spam >> originating from bogus GMail accounts, I have found it necessary to >> block certain GMail traffic. Please phone me if you believe your >> message was not received. >> >> >> _______________________________________________ >> 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. > _______________________________________________ > 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. > > _______________________________________________ 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. _______________________________________________ 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.