Hi, I am trying to operate an SRS SR400 photon
counter using LabView. I have an optical chopper as the external
trigger and I am using both channels A and B in a gated way.
Basically
I can get the photon counter to operate perfectly being controlled by LabView, but if I collect
only one data point at a time in Labview, the data displayed is that
recorded on the photon counter 7 counts previously.
If I ask LabView to
record say ten counts, I generally get 9 of the same number repeated
(the same number which appeared on the SR400 7 counts previously) and
then a random 0 or 6, like it is trying to pull data from an empty buffer, or when there is no data being sent.
I am using a new NI USB-GPIB card to interface the
PC and SR400, which I have not used before, we have always used the PCI cards, so I do not know if it is due to the USB interface or my code. Ultimately I would really like LabView to display the most recent value recorded in the photon counter, and be able to do that for as many counts as I want.
I am sure the problem lies in some buffering or
handhsaking issue, but I'm relatively new to LabView and can't figure
it out. Any help will be greatly appreciated!
The code I'm using is attached
