02-21-2013 04:55 AM
Hi,
I‘m using LabVIEW SignalExpress Tektronix V2.5.1 and confronted some problems saving signal to an ASCII file or a text-based measurement file. I use „Save to ASCII/LVM“ step. With amplitude column in a saved text file everything is all-right, there are problems with time column. If I set „Absolute time“ as Time axis preference in step setup, then in saved text file all time column is filled with the same value for all amplitude values. If I set „Relative time“ as Time axis preference, then time is measured from some specific negative value (in my case: -1,26999999999993870000000000E-7) to other value (1,22900000000005210000000000E-7). It doesn‘t do as is written in SignalExpress help: „Displays the time in terms of hours, minutes, and seconds starting from zero.“
So I have problem in both cases. That‘s because I wrote a program which uses those measurement files which are saved by SignalExpress. If I want that my program could read and process data I need to measure time in nanosecond scale and from zero, not from any other value. Is there any way to do this? I couldn't find how to. Maybe someone had similar problem?
Thanks for help in advance.
02-22-2013 02:36 PM
It seems like you are doing things correctly, but, just to make sure, take a look at this link and see if that is what you are doing:
http://digital.ni.com/public.nsf/allkb/765BCFE8FEE96405862576A1006D1765?OpenDocument