Communicating with a Lock-in Amplifier

[Dedalus7]

I'm trying to use a SR510 Lock-in Amplifier from Stanford Research Systems.  I downloaded their LabVIEW driver from NI, but I don't understand parts of it.  I'm wanting to capture the OUTPUT BNC (the display or demodulator output, available from the front of the physical Amplifier or by command over a GPIB port) over GPIB.  I think I can do this by asking for Measurement 0 (display).  I looked in the SR510 Example VI and see that there is a For Loop that runs 40 times, each time sending a different DAC output [voltage] to DAC ch#5.  How does one interpret these voltages?  (They're calculated in a unique way, so I assume they have some special meaning.)  Does this have something to do with the frequency?  If so, how are these voltages related to frequencies?  If not, how does one set the range of frequencies (or a single frequency) over which to scan?  What if I want to scan at 50 kHz?  I'm rather new to this, so thanks very much for any help.

Andrew

[Dedalus7]

I'm using LabVIEW 8.5.1.

[Dedalus7]

Can anyone help?

[Song_M]

Hey Dedalus7!

Just to note: This instrument driver is provided "as is" and is NOT supported nor maintained by National Instruments or a third party.  The driver references a subVI which references a lot of command syntax that should be outlined in your manual.  Your best bet is to crossreference the string syntax with those of your manual to gain a better understanding of the driver!  Thanks Dedalus!