Hello,
I'm tring to control an old Optical Spectrum Analyzer (OSA) using VISA.
I manage to read and write and present the date - but not to see the OSA display screen! I will explain:
The OSA sweep over some spectrum range continuously - the display actually shows a video.
when the sweep ends it store the data in an array - which I read and show on a wavefrom graph. This is where the OSA display and my waveform link breaks.
for example if I input a command to change the scale of the y-axis or to insert a marker, the OSA display is changed but not my waveform. I could not find any other way to read the data.
from your exprience - such instruments (mine is 20 years old) offer a way to read the entire screen data somehow?
if not, how can I control my waveform graph through my program - for example define the y scale to be the same as that of the instrument?