Multi channel analog output

[Amruth]

HI,

     Iam using 6713 card for analog output generation, I want to generate waveforms across two channels with two indipendent tasks.

     and also I want to change the frequency of any of the channel waveforms without stopping the current generation.

     How can i fulfill my above requirements.

            Kindly reply.

[Dennis_Knutson]

You cannot use two separate tasks. Your board has a single convert clock shared with all of the muxed outputs. You can however, have a single task with multiple channels. What language are you using? If it's LabVIEW, open the shipping example called Cont Gen Voltage Wfm-Int Clk-Non Regeneration. This is for a single channel but can easily be expanded to multiple channels with another function generator function for the second channel. You don't have to stop the task because regen mode is turned off.

[Amruth]

Hi Dennis,

[Amruth]

Hi Dennis,

          you have suggested the example which is in Labview, but  I am using labwindows, can you give me a solution to achieve the same in Labwindows

I have created a tast in labwindows assigned two channels to it, configured the sample clock timing. first I used writeAnalogF64 function to write data to the task with auto start, the 6713 was generating the waveform as expected. While the task is running After a time delay I used the same WriteAnalog F64 to write samples to the task with differant waveform types, still it is generating the previous waveforms, I want the new waveforms to be generated.

Am I doing any mistake please give me a solution.

                                     Thank you.

[Dennis_Knutson]

Sorry, I no longer have LabWindows/CVI. Hopefully, someone else will post with an appropriate example.

[RT4CY]

Hi Amruth,

A great resource on ni.com is our Developer Zone.  See the following Developer Zone article  for an example which demonstrates how to continuously output a waveform using non-regeneration mode in LabWindows/CVI.