Triggered Double Image using Redlake ES 1.0 and NI-1422

[kmisaac]

I am using NI-1422 to acquire TDE using Redlake ES 1.0. However, I am not seeing two images as did before upgrading to IMAQ 3.1.1. When I save the image, it shows only one image instead of two. I am using the same ICD file settings as before. I have also tried the Redlake ES 1.0 ICD file, but without success.
-KMI

[DJ_L.]

In response to: "I am using NI-1422 to acquire TDE using Redlake ES 1.0. However, I am not seeing two images as did before upgrading to IMAQ 3.1.1. When I save the image, it shows only one image instead of two. I am using the same ICD file settings as before. I have also tried the Redlake ES 1.0 ICD file, but without success.
-KMI"

Hey KM,
I just had a few questions about what you are trying to do. First, where are you trying to do this saving 2 images instead of one? Are you trying to do this in the Measurement and Automation Explorer, or are you doing this in your LabVIEW program? Also, are you wanting to see two images instead of one after you trigger your acquisition? Is this normal behavior of your camera to see a double image when triggered? Were you triggering off of both the rising and falling edge of your trigger before? What else has changed other than upgrading to the newest driver version in either your hardware set up or in your software?

Also, please visit the following discussion forum which discusses double triggering: http://forums.ni.com/ni/board/message?board.id=200&message.id=6009&view=by_threading&page=2. This might be what was happening before and been corrected in the newest driver version.

Please provide us with more information (details) on your overall application so that we may be better equipped to assist you. Thanks and have a great day.

Regards,
DJ
Applications Engineer
National Instruments

[kmisaac]

DJ,
Thanks for your response. Here are the answers to your questions:
I am doing the acquisition in Measurement and Automation Explorer.
Previously, I used to see all the images in the buffers when I did the acquisition, and I could see that two images were created with each acquisition as expected in TDE (Triggered Double Exposure) mode.
Yes, in TDE mode there should be two images created. That is the whole purpose of TDE.
I have tried both rising and falling edge trigger. It doesn't make a difference.
I am also seeing that I can get this one image even when I disconnectt the external trigger.
I have also tried the AIA interface trigger instead of the external trigger and it doesn't make any difference.
When I upgraded to IMAQ 3.1.1, I also changed to WinXP and a new PC.
I also have DAQ board and a timer board installed, but not being used.
My application is called Particle Image Velocimetry, and Redlake ES1.0 TDE mode is specifically meant for this application.
I have looked at the discussion forum on double triggering. It is useful. Since the camera and the frame grabber are different in their case, I can't do everything they are doing.

The problem appears to be with triggering. Why am I getting an image when the trigger is disabled?
How can I display all the buffers?
IMAQ appears to be overriding the trigger. Could clicking snap be acting as a trigger.
The camera (ICD) file was provided by Graftek.
The ICD file that came with IMAQ deosn't even create one image. When I click snap the window goes to a coarse grid without giving any error messages.
I have also tried the example "HL Triggered snap.vi" in LabView. Even that is giving an error:
"NI-IMAQ: Did not receive all the expected video data within the timeout period"
Attached is the ICD file from Graftek.

Thanks.

-KM

[DJ_L.]

Hey KM,
Can you please attach your camera file to the discussion forum post, because it doesn't look like it was posted last time. Also, what version of NI-IMAQ were you using before you updated to 3.1.1? Also, can you attach the camera file that was used with the old driver version, because when you used it with the new driver some of the settings might have been changed. So please attach that camera file as well (or the one you received from the camera company). Thanks and have a great day.

DJ
Applications Engineer
National Instruments