NASA NTRS · 19740011677
Automatic frequency control for FM transmitter
Abstract
An automatic frequency control circuit for an FM television transmitter is described. The frequency of the transmitter is sampled during what is termed the back porch portion of the horizontal synchronizing pulse which occurs during the retrace interval, the frequency sample compared with the frequency of a reference oscillator, and a correction applied to the frequency of the transmitter during this portion of the retrace interval.
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Honnell, M. A.. 1974-03-26. Automatic frequency control for FM transmitter. https://ntrs.nasa.gov/citations/19740011677
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