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Overview
Code that illustrates how to use a digitizer to read the real IF data from a VSA configured in downconverter-only mode.
Description
In order to accomplish reading the IQ data properly, we need to allow Digital Down Conversion with other properties. Also, since we are going to have an under sampled signal, we need to calculate the frequency of the aliased signal and set the Scope to this value. This value might change from one device to another, so the code calculates it automatically. For more information on aliased samples, undersampling and Nyquist zones, please refer to the following link.
Requirements
1. LabVIEW 2012 or compatible
2. Compatible NI Scope Driver
3. Compatible NI RFSA Driver
4. A Vector Signal Analyzer
Steps to Implement or Execute Code
1. Select the Downconverter module of the VSA
2. Select the Digitizer of the VSA
3. Specify the Center frequency of the Input signal
4. Configure the reference level, maximum sample rate of digitizer, and the acquisition length
Additional Information or References
Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.