Eq Impulse Response (Low | Mid | High Band) (MB-OFDM)

The Low | Mid | High Band Eq Impulse Response (Equalizer Impulse Response) trace shows the impulse response for the corresponding Low | Mid | High Band of the equalization filter. The Eq Impulse is computed using both the Channel Estimation Sequence portion of the preamble and the data symbols. To see a trace with all Low, Mid, and High Bands combined, see Composite Eq Impulse Response.

The per band results are computed when performing TFI/TFI2 analysis when Frequency Hopping Analysis is NOT set to Force FFI.

The result length will be four times the 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. length so a total of 512 points.

This is similar to, but not the same as, the Digital Demod Eq Impulse Response. The differences are:

Digital Demod computes this by comparing the IQ Meas Time and IQ Ref Time data, while MB-OFDM demodulation computes it from the preamble/data of the burst.
Digital Demod typically uses a running average to average multiple scans when computing the Eq Impulse Response. MB-OFDM demodulation does not average, but computes a new equalizer response for each burst.
The equalization filter is inherent to MB-OFDM demodulation, it cannot be enabled/disabled like Digital Demod.