Using CVO for NTSC output

Hi All,

I have a question that I have been battling for a couple of days. I am trying to use Altera's CVO IP to output NTSC video. I have tried to use the NTSC setting on the CVO but it automatically selects the Embedded sync options, but I need the sync signals on separate wires because my Video DAC requires the sync signals. This is the setup that I have: TPG -> CVO. I am using Quartus 13.0. Here are the settings that I am using for the TPG and the CVO. The pixel clock frequency I am using is 27Mhz.

TPG settings:

image width: 720

image height: 488

Bits per pixel per color plane: 8

Color space: RGB

Output format: 4:4:4

Color plane configuration: Parallel

interlacing: interlace output (F0 first)

pattern: Color bars

CVO settings:

image width: 720

image height: 487

Bits per pixel per color plane: 8

Number of color planes: 3

Color plane format: parallel

Interlaced video: checked

Syncs signals: On separate wires

Active picture line: 20

Field 1

Horizontal sync: 138

hfp: 0

hbp: 0

Vertical sync: 19

vfp: 0

vbp: 0

Field 0

F rising edge line: 266

F falling edge line: 4

Vertical blanking rising edge line: 264

Vertical sync: 19

vfp: 0

vbp: 0

pixel fifo size: 720

Fifo level : 719

I am not getting anything out on the screen with this setup. Can you guys shed some light on what I am doing wrong. Thank you for your help.