Variation of the S/N of the dominant roAp pulsation as a function of the effective cadence for TIC 280198016 (top panel; Sector 90) and TIC 273777265 (bottom panel; Sector 55). Filled symbols show the S/N measured from the DFT computed from light curves that were artificially degraded from the original 20-s SPOC data to longer cadences. Horizontal lines mark the S/N measured directly from original TESS light curves. The dotted and dashed lines indicate the 20-s and 120-s SPOC products for Sectors 90 (TIC280198016) and 55 (TIC 273777265). The dash-dotted line shows the S/N computed from 200-s QLP light curves Sector 90 (TIC280198016) and Sector 82 (TIC 273777265).