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Altera_Forum's avatar
Altera_Forum
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14 years ago

Problems with the Test Pattern Generator

Hi,

I'm trying to set up a Test Pattern Generator from the VIP.

I'm using a Cyclone III Development Board with DVI adapter.

My problem is, that the monitor shows no pattern.

The resolution is 1680x1050.

I used the following settings:

External PLL Clock: 119MHz

Hor Blank: 160px

Hor Sync: 32px

Hor Front Porch: 48px

Hor Back Porch: 80px

Ver Blank: 30lines

Ver Sync: 6lines

Ver Front Porch: 3lines

Ver Back porch: 21lines

I take a few pictures and attached them to my post.

Hope somebody can help me.

Thank you!

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Hello again,

    in the meantime, i tried another system unseccesfully.

    In Qsys I took a Clocked Video Input and gave it on a Clocked Video Output, so that i get a loop through. For the settings I take the DVI 1080p60 presets.

    The Video Clock comes from a PLL and the System Clock is 125MHz from Y4.

    Anyway I don't get any picture out of my DVI port =(

    Besides I measured with a scope at measuring point V on the Bitec DVI Card.

    On the input site, I could see a vertical sync signal. On the output site was nothing...

    Now I thing that I have overlook something on the board.

    Thanks for help!