Basic measures and the output impedance of the change with PXI-4461?

Hello

I am required to build an audio station with platform PXI OR test.

It is my first experience with Renault. So I don't really know a lot...

The PXI-4461 is a replacement of a former HP audio Analyzer. The measure is quite simple:

1 generate fixed freq signal and measure AC RMS power

2 measure THD (total distortion harmic) at frequency fixed

3 measure SNR (signal to noise) at frequency fixed

4 generate and measure DC signals

5. change the output impedance of 50 ohms and 600 ohms.

If I have a good feeling on which tasks 1 to 4 are feasible. I would like to ask if the task 5 (change the output impedance) problem possible?

If this isn't a work around?

As for tasks 1 to 4, it is possible with out doing 'a sound vibration' Toolkit?

How helpful the Toolbox will be for the tasks listed above (humble).

What should be my starting point learn to manage these measurement with Labview?

Thanks in advance

Hi Hazkel,

Sound and Vibration toolkit will help a lot with steps 1 through 3.  This without the Toolbox would require a very high level of knowledge with LabVIEW and you will probably run again for complications.  In response to the fifth step, I tried to adapt the output impedance and am not able to do so programmtically.  However, you can still do this in hardware by adding a shunt resistor and potentially switch between if necessary impedances.  We have an article that deals with impedance matching and a circuit configuration to set the impedance if you are interested:

Impedance and impedance matching

http://www.NI.com/white-paper/3475/en/

I recommend starting with examples that we have already built in LabVIEW to familiarize yourself with the concepts.  You will find them by clicking on help-> find examples-> search, then search for your application. Please let me know if you have any other questions.

Thank you

Tags: NI Hardware

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