Problems with getting waveform using tektronix tds 6604

[plate-wis]

hello,
i'm using the scope tds 6604 with tektronix
lv-driver (TKTDS6K) under lv 6.0.2.
I always want to read the displayed waveform via GPIB.
This is not a problem. The waveform and the scales are correct. BUT if I stop the aquisition on the scope
Run/Stop-Button) and then change the time- or
amplitude-scale or the position of the graph on the scope, I read the correct waveform but the scales are incorrect. I tested it for a while but I could not see a system. Perhaps do I have to use some mathematical operations with the array, in order to receive again the correct scalings and positions?
thanks in advance, sven

[Dennis_Knutson]

without looking at the actual LabVIEW driver, my guess would be that the VI's graph settings are obtained by the VI that you use to programatically set vertical and horizontal settings of the scope. If you manually change the scope, the capture waveform VI has no idea what the settings are because all it does is retrieve the waveform and doesn't do a query to get updated scope settings. If mixing program and manual control is soemthing that you need to do, you'll have to add the code to query the scope for it's settings. Most drivers don't have these queries because typically, only the program is in control.