docs(wiki): add PureSignal Feedback Calibration page Bench procedure for setting HW Peak on chains that don't match the per-board defaults — external amp sample taps, inline attenuator pads, non-standard coupler factors. Covers what the Observed bar actually measures (post-IQC TX envelope vs LUT scale, not raw feedback RF), how to use Feedback Level as the ground-truth ADC indicator, when to add a pad vs adjust HW Peak, and a worked example for the ANAN-G2 + RF2K-S -55 dB tap chain that lands at HW Peak 0.655.

Kb2uka committed May 16, 2026