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No Color with ADV7393 Internal Color Bar Test Pattern

Question asked by david.k on Jul 11, 2012
Latest reply on Feb 11, 2015 by mattp

Hello,

 

I'm trying to use an ADV7393 Encoder to generate a color bar pattern for testing purposes. The pattern shows up, but without color. I'm using ADV Register Control 3.56 to modify the registers according to Table 60 of the datasheet for Composite video on DAC1 output(all other registers are set to their default values):

Register Settings.jpg

The color carrier appears in the signal and is at the right frequency (3.57MHz):

tek00096.png

 

I'm a little stumped. The color carrier is present and at the right frequency but I am getting this on the display:

IMG_0127.JPG

I've verified the display with a NTSC generator. I was wondering if there was a register setting I'm missing; is this a known issue? Any help would be appreciated.

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