TDS640 PIB Hardcopy"Clipped"

[mjschurmann]

I'm using GPIB to save the hardcopy image to a computer. The read/write is simple enough. Send the hardcopy command:

HARDCOPY PORT GPI; HARDCOPY START

Then I'm using a VISA Read to save the image to a text file. The issue I'm having is that my images are "cut" half way down. Any ideas?

[Arham-H]

Hi 

Did you try increasing the byte count for the VISA Read function to see if made a difference?

Regards

[mjschurmann]

I'm already using 100k, even though my captures are only about 45k. I will try it though, see if it makes a difference. 

[crossrulz]

You might also need to increase your VISA timeout.  Are you getting any errors or warnings?

[mjschurmann]

With my VISA time-out increased to 5000ms, it's still occurring. Could this be related to how I'm saving off the file? I'm reading the data to a text file, then saving it to a .BMP on the local machine. However, an image would be binary, right?

See my VI Attached. 

[crossrulz]

Ok.  I see a couple of problems there.

1.  Do the hardcopy as a PNG.  It is a much smaller file than the BMP and will still look good.  Less data over the bus is almost always better.

2.  Use the VISA Read to File function.  It is a single function that will read that data from the bus and save it direcly to a file.  Your other alternative is to right-click on your Write to Text File and uncheck "Convert EOL".  It is likely the convertion of the EOL that is messing up your image.