Clocked video output

Hi Thiago,

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The synchronization signals settings are what I need to know

Using embedded sync signals the video was output perfectly, but I really need the external sync signals to drive other components

Thiago

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One issue you may have run into is that the NTSC format is actually has 487 lines (f0 - 244, f1 - 243). To get the same frame as the embedded syncs mode (minus the bt656 embedding) put the values in with no fp or bp:

active width = 720

active height = 487

horizontal sync = 138

horizontal fp = 0

horizontal bp = 0

vertical sync = 19

vertical fp = 0

vertical bp = 0

f0 vertical sync = 19

f0 vertical fp = 0

f0 vertical bp = 0

f rising edge line = 266

f falling edge line = 4

vertical blanking rising edge line = 264

There's a bug in the GUI where the 'active picture line' gets greyed out in seperate sync mode. Make sure it is set to 20 (switch the embedded sync mode to make it editable).

This mode won't output bt656, if you need that you'll have to embed the syncs yourself. Do you require an embedded sync mode where you can see the sync signals v,h,f?

The test pattern generator doesn't support odd numbers of lines in interlaced format though so you won't be able to get it to output 487 lines.

Regards,

Gareth.