[time-nuts] World's most accurate PC clock!

Tom Van Baak tvb at leapsecond.com
Mon Jul 4 13:59:09 EDT 2005


> The correct frequency is 315/88 MHz, but that is not the original
derivation
> of it.  I found the real derivation on the web some time back, but now
> I can't seem to find it again.

See Color Subcarrier Frequency, the 5th page of chapter 8:

NTSC, PAL, and SECAM Overview
http://www.deetc.isel.ipl.pt/analisedesinai/pdsII/downloads/doc/ch08.pdf

A GIF of the three equations is at:
http://www.leapsecond.com/pages/18hz/NTSC1.gif

/tvb







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