SCH phase adjustment for digitally synthesized video test signal

Details SCH phase adjustment for digitally synthesized video test signal SCH phase adjustment for digitally synthesized video test signal

1996-01-22

1998-01-20

Peng, John K.

Television

Monitoring, testing, or measuring

Test signal generator

348194, H04N 1700

Patent

active

057105936

ABSTRACT:
A digital test signal generator includes the ability to adjust the SCH phase of the output test signal. A color frame reset pulse is generated at the beginning of each color frame of the output test signal. The color frame reset pulse is input to a direct digital signal synthesizer together with an SCH phase adjust signal to initialize the synthesizer with an SCH phase offset at the beginning of each color frame. By varying the amount of the SCH phase offset, the SCH phase in the output test signal is varied.

REFERENCES:
patent: 4788585 (1988-11-01), Suzuki
patent: 5001549 (1991-03-01), Holmbo et al.

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