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ADV7391 Test pattern Noise

Question asked by Sukumar_Reddy on Jan 18, 2018
Latest reply on Jan 22, 2018 by Poornima


While enabling test pattern through I2C on ADV7391 able to see test pattern on screen. On some boards I am seeing some black dots randomly and sometimes slightly flickering pattern.Please suggest us the are of suspect.

Please note that we passed ADV7391 output to  ADA4430-1 filter and Leaving HYSNC and VSYNC floating causes any issue while generating test pattern.



Sukumar Reddy.