Slow data transfer via gpip from tek scope

Question

I have tds 1012 scope, we are trying to tranfer the waveform from the scope real-time. The time required for the transfer is about 400ms, however the data is generation is once in 100ms. This means that we are missing 3/4 of the data. Is there any way to get around this problem.

Answer 1

Hello,
I did not understand very well the problem. How much data do you want to transfer in one second? The GPIB would communicate at the rate the instrument needs if you are configuring everything ok. If the data in the scope cannot be transferred at the desired rate then the only thing is to store the data into a file or into a buffer in the computer and then analyze it. If what is happening is that the scope does generate the data but the GPIB doesn�t communicate it at the desired rate, what could be happening is that you might be opening and closing a GPIB or VISA session every time you read and that is not efficient because there is a lot of time lost . What you need to do is open the session once, then have in a loop the read or write and outside the
loop close the session. So open and close are outside.
You can also check if you can set a bigger buffer in the instrument so the data will not be lost, but remember that the amount of data that can be transferred with GPIB is huge so that shouldn�t be the problem. I think the problem is the way your program reads the data or by the some setting in your instrument.
Hope this helps
Ricardo S.
National Instruments