Reference Library

Learn controller diagnostics

The vocabulary, comparisons, methodology, and platform guides behind every test, fix, and review on GPADLAB. Built for players who want to understand the numbers, not just see them.

Sections

The reference library

Live
Glossary
Every controller diagnostic term, defined in plain language. Stick drift, deadzone, polling rate, Hall effect, snapback — the vocabulary behind the rest of GPADLAB.
Browse A–Z
Live
Compare
Side-by-side breakdowns: Hall effect vs potentiometer, TMR vs Hall, wired vs wireless latency, XInput vs DirectInput, Bluetooth vs 2.4GHz proprietary.
Browse comparisons
Live
Methodology
How GPADLAB measures input lag, detects drift, calibrates deadzones, and grades controller health. The full diagnostic process, documented.
View methodology
Live
Guides
Platform-specific setup walkthroughs: testing controllers on Windows, macOS, Steam, Steam Deck, Android, and iOS — plus calibration tutorials.
View guides

Learn controller diagnostics

The reference library

Glossary

Compare

Methodology

Guides