Quote:
Originally Posted by old_tv_nut
A further complication was that although the burst included in the signal followed any phase or amplitude distortion of the chroma, it had to be replaced by a clean burst meeting FCC signal specs before broadcast or distribution on an analog cable system. If the re-inserted burst phase didn't match the incoming (which happened often), the error was baked into the signal receivers saw.
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This was a problem with the VIR auto color system too...it fed a line of color bars in the closed caption area to calibrate the TV off of...broadcasters didn't have to ( and really should not have) replace the VIR signal in network feeds, but they often did making the system do the opposite of what it was designed to do.