FreqErr (802.11n/ac/ax/be)
(Frequency Error) shows the carrier frequency error relative to the VSA's center frequency. It is the average carrier frequency minus the VSA center frequency. This parameter is displayed in Hertz and is the amount of frequency shift from the VSA's center frequency that the VSA must perform to achieve carrier lock.
The Frequency Error is estimated from the preamble and then refined based on the Common Pilot Error found in the data during . does not directly correct the signal for frequency errors; it only corrects the post-FFT Fast Fourier Transform: A mathematical operation performed on a time-domain signal to yield the individual spectral components that constitute the signal. See Spectrum. symbols for phase (and amplitude, when enabled).
Errors in RF Radio Frequency: A generic term for radio-based technologies, operating between the Low Frequency range (30k Hz) and the Extra High Frequency range (300 GHz). frequency, LO frequency, or digitizer clock rate could all appear as carrier frequency error.
Preamble Frequency Error Trace
The VSA also provides the Preamble Frequency error shown over time; see the Preamble Freq Error trace.
See Also
