-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 6/2/2012 8:02 PM, gene heskett wrote: > We used to be proud of saying our color subcarrier frequency was > 3.57954545454545454545454545 megahertz until you ran out of wind to > say the 45. Actually there was about 12 digits that were good but > it started to get a little fuzzy after that. ;-) I think you can > buy a serviceable one for about $1000 now.
Very impressive (even today!). ...but that must have been some time ago. I design video equipment for my day job, and the subcarrier frequency has been rounded off to 3,579,545.0 Hz +/- 10 Hz for as long as I can remember, at least in the international standards. The (old) US documents show a reference 5 MHz signal x 63/88 which gets your .5454 repeating, but the newer standards base everything off the defined subcarrier frequency (nothing after the decimal for the US television standard). But none of that really matters any more. Now that over the air TV transmission has gone full digital, you can no longer use your local network affiliates as a free timing reference good to a couple parts per million (or better...most of our local stations were easily within 1 Hz of the reference ~3.58MHz spec). :( Then again, these days I guess that's what GPS satellites are for. :) - -- Charles Steinkuehler char...@steinkuehler.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk/Kz/wACgkQLywbqEHdNFxLGwCgoFQ2poD3kxpGIgdiTRdpdpTb v1YAoNszh9IRx3CGPta5Ex0JmYo1Fcmi =p/kr -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
