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DM3730 cvbs out port problems

Qing Chang
Intellectual 280 points

I have a mistral EVM, the revisions are , main board REV G, proc board REV D.

I have tested the cvbs in and out with the program located in ti-dvsdk_dm3730-evm_4_02_00_06\dmai_2_20_00_15\packages\ti\sdo\dmai\apps,

Following problems found:

1.No matter a NTSC or Pal signal is fed to the board, board cannot provide a NTSC output,  only PAL signal are output to TV.

2. No matter a NTSC or PAL signal is captured, There is only Y component can be seen on TV , without Cb, Cr.  While, if used LCD instead of cvbs, everything looks well.

hope you technical help.

  • 0
    TI__Guru 65405 points
    Hi Qing Chang,

    1. Could you try the steps described in the linked below tutorial about switching between LCD and TV? Make tests with both PAL and NTSC and share the results.
    processors.wiki.ti.com/index.php
    2. Could you check the S-Video output with the settings used for CVBS TV out whether presents Cb and Cr but not only Y component because there is a problem with the CVBS TV output.

    BR
    Tsvetolin Shulev