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I am using labview 5.1 to program Profile's PAT9000 polarization analyzer via GPIB. The PAT9000 is connected to a TLS via the same GPIB bus. For this setup to work properly, GPIB system control should be passed to the PAT9000 as soon as a measurement command is sent from the computer. After operation is complete, the PAT9000 passes control back to the PC. The problem is that I have no way of determining when operation is complete. Polling the PAT9000 will not work because that operation requires the computer to be system controller. I welcome any suggestions especially from those who have dealt with pass control issues or who have written control VIs for the PAT9000.
