• Antenna frequency.
  • The scope of the histogram, e.g. if the histogram contains data for the entire station, or has data for just a single antenna.


  • For each histogram type (e.g. RSSI), there can be multiple histograms up to this limit. For example, an interface might have 1 histogram for station-wide RSSI, but also 1 for each of the antennas used by the interface.
  • All histograms have a fixed number of buckets. To save space, each histogram type uses a vector to hold only non-empty buckets (a sparse histogram), with these constants as the max size of each vector. Noise floor values range from -255 to -1 dBm.
  • RSSI values range from -255 to -1 dBm.
  • Size of RxRateIndexHistogram lookup table (see comments in RxRateIndexHistogram).
  • SNR values range from 0 to 255 dB.