Ok so I am wondering if I am jamming the right direction here. Approaching a Poliscan which is targeting the rear of the car - typical 45 degree (odd) angle from the rear so it scans/detects your speed as you pass the unit. What has happened a few times in traffic is that my 4-head ALP (2 front / 2 rear) goes off before I go past it (it cannot be targeting my car as I am behind the unit) - the APL must have picked up the laser bouncing off the car in front (don't know). The alert is "Poliscan front" - but the laser is aimed at my car from the rear. NOTE: YES - the sensors are configured correctly and the alerts are correct - the front sensors state front and the rear state rear - I have tested this with my own laser tester and am 100% certain of the configuration. In this instance that the front sensors picked it up (somehow) does it mean: 1. only the front are sending jamming pulses or 2. all four sensors are sending jamming pulses? I'd like to know as its happened a few times and I would like to know if I am protected by my rear-facing sensors jamming the laser, which obviously are the only ones that have any chance of jamming the unit.