Radar detection methods are probabilistic, not deterministic, therefore radar signals are very short bursts that are a challenge to detect and are prone to false positive. Some areas of a building might exhibit no radar detection events, other areas may be plagued with them. Possible causes are:
- AP(s) on other channels close to the detecting AP causing unintentional interference that might be detected as radar on another AP.
- Clients or other valid wireless (non-802.11) devices emit signals that might appear to an AP as radar
- Bad 802.11 client drivers emitting signals that look like radar
- Dense user environments that create transient noise that might be detected as radar where in idle user times, no radar is detected (weekends/nighttime.)