I tried to build up communication between my computer and SR830 lockin amplifier using rs232 and I tried the driver example for SR844 from NI http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=1405 it worked well with a little modification.
The problems I have is when using SPTS? to get the number of points stored in the buffer, then what is the volume of bytes that is required for VISA READ. And when using TRCA ? i,j,k to read buffer of a certain channel, what is the volume of bytes if I want to get 20 points for example? That is to say, what is the structure of the points stored in buffer?
The last question is does SR830 put the value of R, θ or noise into data buffer so I can read them by TRCA ? i,j,k? If so, how to configure the labview program?
Thanks very much!
