The color burst from AD723 seems to move on AD723 Eval Board.

Hello Tamu,

Process variations would produce a fixed delay in the path, so the phase ambiguity would still be the same.  Power supply level would also produce a fixed delay, as long as it stayed constant.  There may be an insignificantly small variation in delay as the supply is varied, but this can be ignored since it would be much, much less than 90 degrees at 3.579545 MHz (about 70 ns).

Frequency errors in the external 4FSC source will result in corresponding frequency errors in the colorburst and chroma subcarrier frequency.  If the colorburst is used at the receiver to recover the chroma subcarrier reference, there will be no subcarrier-related errors in the chroma demodulation.

Best regards.

--Jonathan

Hello Tamu,

Process variations would produce a fixed delay in the path, so the phase ambiguity would still be the same.  Power supply level would also produce a fixed delay, as long as it stayed constant.  There may be an insignificantly small variation in delay as the supply is varied, but this can be ignored since it would be much, much less than 90 degrees at 3.579545 MHz (about 70 ns).

Frequency errors in the external 4FSC source will result in corresponding frequency errors in the colorburst and chroma subcarrier frequency.  If the colorburst is used at the receiver to recover the chroma subcarrier reference, there will be no subcarrier-related errors in the chroma demodulation.

Best regards.

--Jonathan