USB-6259/BNC-2110 initial setup issues

[bearindown\]

We have a USB-6259 connected to a BNC-2110 and are trying to check the basic functionality by sourcing and measuring slow sine waves.  We are using Labview 8.5 and DAQmx v8.6.1.  These are some of our observations:

- DAQ Assistant - Generate Signals - Analog Output - Voltage - shows only options for ao0-ao3 but the BNC-2110 has connections for ao0-ao7.

- Simulate Signal to DAQ Assistant - Generate Signals - Analog Output - Voltage - selecting ao0 gives a sine wave at the correct frequency(1.1Hz) but it very dirty.  See attachments - SineWaveOuptutTest1_1Hz.vi and ScopePic.jpg

- Simulate Signal to DAQ Assistant - Generate Signals - Analog Output - Voltage - selecting ao2 or ao3 does not give any sine wave output.  

Please let us know if you have any suggestions.  

[Kyle_A.]

Hi bearindown,

The reason you see ao0-ao3 only is because the 6259 has only 4 AO channels, while the BNC accessory can support up to 8.  The BNC accessory does not actually output the signal, it just gives you a different connection interface, so unless your DAQ has 8 AO channels then you will not use ao4-ao7.

The reason why your signal looks that way is because you are using Finite Samples as the generation mode in your DAQ Assistant.  To change this, double click the assistant, and in the configuration tab change Finite Samples to Continuous Samples.

As for your third observation, I am unsure why you are not seeing output from those two channels.  Can you reverify this and let me know if you are still seeing this issue?  Make sure you have your connections done correctly, the BNC configured properly, and the correct channel selected in the DAQ Assistant.