(The following is from: Peter Bennett VE7CEI (firstname.lastname@example.org))
|NotTaR of Television Sets : What is the maximal allowed deviation of..
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In Canada and the US (525 line, 60 HZ, NTSC), the horizontal frequency is
15,734.264 Hz. The colour subcarrier is 455/2 times the horizontal
frequency which should come to 3.579545 MHz. I believe the tolerance on
the subcarrier frequency is +/- 10 Hz.