Time-domain waveform: The waveform artefact is retained for the configured diagnostic workflow. No live waveform has been persisted for the selected sensor yet, so the plotted waveform remains at zero until verified waveform data is available.

Waterfall plot: Spectra stacked by date (newest at front). Orders and order-bands use the asset running speed from Benchmark Metrics (placeholder 1480 rpm until set); typical bearing fault-order markers (BPFO/BPFI/BSF/FTF) are shown for reference and become exact once the fitted bearing is assigned on Bearing & Gearbox. Requires at least two wave captures.

Cepstrum: The inverse transform of the log spectrum; it collapses periodic structure such as bearing harmonic families and gear-mesh sidebands into single quefrency peaks. Pair it with the waterfall and envelope to confirm a modulating period.

Envelope analysis (ISO 13373-3): High-frequency carrier signal (2 to 5 kHz band) is band-pass filtered and amplitude-demodulated (Hilbert transform). The resulting envelope spectrum reveals bearing fault frequencies masked by machine noise in velocity spectra.

How this works: Select an equipment category above to surface failure mechanisms, recommended predictive maintenance methods, inspection intervals and corrective actions from the configured Optimal® reference library. Each mechanism is mapped to detection methods so the page can support targeted maintenance programmes without implying live Demo Gold Mine diagnostic findings.