Gets the center frequency of the IF output that corresponds to the configured RF center frequency.

Syntax

Namespace: NationalInstruments.ModularInstruments.NIRfsa

public double IFOutputFrequency { get; }

Remarks

Returns a Double representing the center frequency of the IF output that corresponds to the configured RF center frequency.

The downconverter translates RF input frequency to the IF output frequency by mixing it with the LO signal. However, the coarse nature of the LO settings can cause the downconverter to be unable to tune to the exact LO frequency that would produce the nominal IF output. Any coercion in the actual LO frequency results in the IF output frequency being slightly off from the nominal value. Additionally, if you use the DownconverterCenterFrequency and LOFrequency properties to program the downconverter, then the IF output frequency could be very different from the nominal value. NI-RFSA adjusts the acquired spectrum or I/Q data for the difference between nominal and actual IF output frequency.
Note

If you use an external digitizer with the NI RF downconverter, use this property to specify the actual IF output frequency.

Exceptions

TypeDescription
System.ObjectDisposedException

The IFOutputFrequency property was accessed after the associated NIRfsa object was disposed.