How accurate (close to) 14.31818 MHz should the frequency be?
A1 An accuracy of ±500 Hz is sufficient. The deviation of the sub-carrier frequency of 3.579545 MHz for broadcasting standard should be approximately ±20 Hz, but for general consumer products, the deviation can be approximately ±100 Hz. However, the accuracy of the sub-carrier frequency may pose a problem only when internal video signals are used. In the external video signal mode, the frequency is used only for the clock of the synchronization separator and may deviate in a range of ± several 100 Hz.
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