09-29-2014 05:39 AM
Hi,
According to the manual the 6259 device can use an external reference for analog output.
My problem is that I can't find the setting to select it. The NI-DAQmx help says: "The external reference voltage settings are available as a Channel property in the Analog Output»General Properties»DAC»Reference Voltage".
But where do I find this setting? I'm unable to find it in both MAX and SignalExpress. Do I need to use LabView to access this property?
Or is the external reference feature not available on USB-devices?
Regards,
Joacim
09-30-2014 09:41 AM
I've found that it can't be done in MAX, but it's possible in LabView.
However I can't get the "External", for the reference source, to work properly. Any suggestions?
09-30-2014 10:00 AM - edited 09-30-2014 10:02 AM
deleted
10-01-2014 02:44 AM
Hi Joacim,
In the example, External Source is named Dev1/EXTREF. EXTREF do not exist on USB-6259. You need to use one of the two APFI channels.
E.g. Dev1/APFI0
If you already do that, any error messages? Or how does it not work?
Best regards,
Klas
10-02-2014 07:24 AM - edited 10-02-2014 07:27 AM
Found the problem.
I connected the external reference voltage to PFI0. After I switched to APFI0 it worked.
I also found a better example vi here.
Thanks for your reply.