Calibration

Every NI 5661 RF Vector Signal Analyzer is individually calibrated for accurate frequency response at the factory and ships with a calibration certificate verifying NIST-traceable accuracy levels.

During frequency-response calibration, the RF Signal Analyzer is used to measure a NIST-certified high-precision signal. Any error in the returned data is quantified as a set of calibration constants. These calibration constants are used by the software to calculate and apply correction to your analysis based upon the spectrum of interest. For more information on applying calibration correction, refer to the example programs installed with the RF Signal Analyzer.

To preserve specified accuracy and NIST traceability, NI recommends returning both modules of the RF Signal Analyzer to the factory for annual recalibration. The RF downconverter module and the IF digitizer module are calibrated independently of one another, not as a combined system. For more information on calibration, contact NI or visit ni.com/calibration.