Why vertical scrolling is appearing during grabbing with MAX

[Alex_Muz]

My digital camera supplies 40MHz pixel clock, 640x480 frame (with FE and LE controls) and 60 frames per seconds .
I am using the MAX utility to grab the camera video with the NI-1422. The Max capture the camera video, but the video is scrolling vertically on the acquisition window.
While I changed the scale parameter into camera prprperties to 2 (captures every second line and pixel)
the picture is decreased to 1/4 of the acquisition window and the vertical scrolling is stopped. Is there a problem to acquire and display 40MHz, 60 fps video?
While I am trying to Snap the video the MAX timeout error is occured.

[BruceAmmons]

Alex,

It sounds like a timing issue. Hopefully the NI folks will be able to help you figure it out.

In the meantime, you might want to try reducing the height of your image by a line or two. I had a similar problem once, and that fixed it for me.

Bruce

[Alex_Muz]

I tried to change the height of the image but it did not help. I tried to change other parameters in camera properties and it did not help. After that I changed the camera type, and found that one of the cameras configuration stops the vertical scrolling and complited Snap operation.
I tested all differences between my and camera *.icd files and found that SynchronizeEnables(Yes) line into *icd file causes vertical scrolling. After I removed this line from my *.icd file it solved the problem. Maybe you know what is parameter meaning?

[BruceAmmons]

It sounds like you did a pretty good job troubleshooting. I am not sure what the parameter means. I think Enable is a signal that is sent to the camera, but I am not sure what it would be synchronized with.

Instead of deleting the line, I would probably change the parameter to No. Putting a comment explaining why you changed it helps also. I would also change the name of the file so it doesn't get overwritten if you upgrade IMAQ.

Bruce

[Alex_Muz]

Hi Bruce,

Thank you for your comments