Our product uses the ADV7619. For the picture below, the source signal is from a Quantum generator, 3840x2160, 30hz, ramp pattern.
Intermittently, the 7619 shows noise/streaks, usually for the red pixels. To clear the noise, we switch the input timing to a HD rate (162 Mhz or less) and then back to 3840x2160, 30 Hz. For example:
- set Quantum to 1080p30
- reprogram 7619 to process HD rate timing
- set Quantum to 3840x2160, 30
- reprogram 7619 to process 4k
- the ramp no longer shows the noise/streaks
We followed the settings in app note RecSettings_1-2-120802011.pdf.
We would very much like to avoid these streaks. Any suggestions would be appreciated.