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TVP5158 loss the sync when IR camera is used and turn on IR lamp

Viet Dinh
Genius 15310 points
Other Parts Discussed in Thread: TVP5158

According to ITX, TVP5158 loss the sync when IR camera is used and turn on IR lamp.
 
You can try this situation like below.
In the very bright room, you can find the sync loss of TVP5158 when the camera is covered by your hand(or something) and is uncovered.
Could you please try this test? I'll visit ITX this thursday and will check this issue directly.
 
And also, I heard there is still linelock camera issue even when they patched TVP5158 using latest patch file(received at Mar/11th)
But, I'm not sure if they are surely patch TVP5158 correctly, and want to know how I can confirm this patch.
Could you please let me know how I can confirm this patch is updated correctly? What is the ROM version of this patch?

Thanks and Best Regards,
SI.

  • 0
    TI__Genius 15310 points

    SI,

    To check for the patch download correctly, you can read the RAM Version (register 05h) and RAM Test Version (register 06h).  For example, if the patch is 02.01.17, you should get 01 for register 05h and 17h for 06h.

    We will try the sync loss in lab.

    Regards,

    Viet

  • 0 in reply to Viet Dinh
    TI__Genius 15310 points

    SI,

    I just tried to reproduce the lost sync problem in lab but could not.  I got a bright light pointing to the LG camera and use my hand to cover and uncover the camera.  I donot see any vertical lock during the transition.  I was using the TVP5158 EVM in D1 bypass mode.  Do you see this problem with our EVM there?

    Regards,

    Viet

  • 0 in reply to Viet Dinh
    TI__Prodigy 90 points

    Hello Viet,

    We do have ITX DVR box in our lab. Could you please check this issue on it? Thanks.

    Best regards,

    ChengNing

  • 0 in reply to ChengNing Wang
    TI__Genius 15310 points

    SI,

    We tried the ITX and UDWork DVR boxes with PAL and NTSC but don't see any sync lost problem.  Can you tell me is it visible or you see in from system interrupt?

    Regards,

    Viet

  • 0 in reply to Viet Dinh
    TI__Mastermind 30810 points

    Viet,

    Thanks for your test and feedback. I think no more action is needed.

    I confirmed ITX did not update our latest patch yet, and this sync lost problem is related with this patch - sync lost at low level input.

    ITX found the input level would be lower when a bright light is shined in IR camera and they did not update our latest patch yet.

    So, I & ITX are expecting this issue will be solved if ITX update our latest patch.

    Could you please give me the update procedure of this latest patch to solve line-lock camera issue ?

    Because ITX's engineers are very busy to prepare production, it is prefer for us to provide simple update method. 

    If there are more issues even after updating this patch, I'll let you know.

     

    BTW, just for reference, this sync loss would be occurred with IR camera only, not normal camera. The testing method using normal camera which I gave you was wrong information. sorry for this... ^^

     

    Thanks and Best Regards,

    SI. 

  • 0 in reply to Sung-IL
    TI__Genius 15310 points

    SI,

    Attached is "TVP5158 How to Load RAM Code.pdf".  Please let me know if you have any problem.

    Regards,

    Viet

    TVP5158 How to Load RAM Code.pdf
  • 0 in reply to Viet Dinh
    TI__Mastermind 30810 points

    Thanks Viet,

     

    Best Regards,

    SI.