The Analog Edge is a 14-part field guide to the half of a scanner that software can’t fix: everything between the antenna and the ADC. The issue tracker keeps teaching the same lesson — half the hard bugs were in the samples, not in the code — and this series turns those postmortems into working knowledge: what dBFS actually measures, how to stage gain without chasing a software threshold, what clipping, intermod and phase noise each look like from the decoder’s side, which sample rate to run, and how antennas, feedline, filters and LNAs decide your noise floor before GopherTrunk sees a single sample.

It is the operator’s companion to two concurrent series: where Weak-Signal Engineering explains the algorithms that recover a marginal signal, The Analog Edge is about not being marginal in the first place — and about capturing honest evidence (pre-combine IQ, sidecar metadata) when you are. One thread runs the length of the series: a system that decodes cleanly on a hardware scanner but garbles in software, and the analog-side causes eliminated one part at a time.

Every post reads three ways: a TL;DR + cheat-sheet for skimmers, bold headers, tables, and diagrams for the medium read, and full prose with real measurements for the deep read.

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