Does the 1422 grabber use line valid and frame valid signals

[Fuba]

Hi,

Setup: I have set a camera (digital) to acquire a 200x200 image (Basla config software), and set the “channel->properties->Basic->Acquisition Window” values to 0,0,984,989 (in MAX); the camera is in free running mode at 20 fps.

The problem I have is trying to understand the returned image, i.e. when I acquire using SNAP I end up with multiple frames in the window. This leads me to believe that the 1422 does not use FVAL and LVAL lines. Is this so?

Thanks in advance

[Fuba]

oooops - wrong place

[Jack_A.]

The 1422 does use both the FVAL and LVAL signals (or elso you would never get a frame). In order to only see one image, you need to change the acquisition window in MAX to be the same size as the image. In your case, you are telling MAX to acquire an image 985x990 while your actual image is only 200x200. Therefore, MAX will append lines onto the image until it reaches 985. That is why you are seeing multiple images. In MAX, set your acquistion size to 200x200 to solve the problem.

Hope this helps.

Jack Arnold
Application Engineer
National Instruments