This read-only object identifies which of the four demodulators a given row of the stored statistics table applies to. This is the statistics-table counterpart to cdd564EventDemod, letting an admin retrieve periodic performance samples, like Eb/No averages/minimums and timestamps, independently per demodulator, so cross-comparing statistics across demodulators requires tracking this index for each retrieved row. An admin comparing long-term signal quality trends between two antenna feeds would pull the statistics rows for each demodulator's index separately to build a per-feed history rather than one blended dataset.