Hi, new user so thanks for your patience.
Calibrated and confirmed appropriate procedure per reference videos.
Did a wide sweep, and then resonant sweeps for two different triband antennas and found: good VSWR for two bands (~1.2:1 , high VSWR (¡À5:1) for other two bands, both antennas on different bands (one was high on 75cm, the other 220(?)). So two different bands had one high SWR, and two low SWR readings on _different bands_. (Comet vs. Fong)
Would the reason be calibration, normal, or user error? Thanks!