Hi, my customer is using the AD725 device to convert RGB (with CSYNC input) to NTSC composite
output. The device is working good except one thing.
The NTSC output has a color burst generated by the AD725 as part of the NTSC output signal.
The magnitude of the color burst signal should be 40IRE±1IRE (=285mV p-p) according to RS 170A standard (NTSC).
The measured magnitude of the color burst is 34 IRE (about 246mV p-p).
TheR G B inputs are at the correct magnitude and also the NTSC output signal is at the correct amplitude (except for the color burst).
Is there a way to control the magnitude of the color burst without changing the magnitude of the NTSC signal?