I took a look at these "solar array simulators" on agilents website. It looks like they have a GPIB interface on them. With this and a GPIB card it should be fairly simple to program for this instrument through VISA calls in LabVIEW. Unfortunately I do not think there is a LabVIEW Instrument Driver for that instrument yet. Because of this you will have to read through the manual and find that appropriate commands required to control this instrument through VISA commands. There is a wealth of information on developing your own instrument drivers in LabVIEW on the NI web page at: httP://www.ni.com/idnet