Assertion: pilot tone | /r/AtLocation | the signal
Facets:
value: to detect timebase errors
type: PURPOSE
Source sentences:
text: In some analog video formats frequency modulation is the standard method for recording the luminance part of the signal, and is used to record a composite video signal in direct color systems, e.g. Video 2000 and some Hi-band formats a pilot tone is added to the signal to detect and correct timebase errors.