Came across a radar trap and decided to do some mini testing of the Bel STi against a city cop's constant on Ka.
Approaching the cop from behind, the Bel Sti alerted me about 100m away, (not bad considering there was a large billboard between me and the the cop, which was partially obstructing the view. The cop was parked about 50 ft off the road in an office building parking lot, looking at the oncoming traffic.
Going past the cop so that he was behind me, I was getting good Ka reception, possibly bounced of trucks and buildings etc back into the Sti rec'r.
About 500m (0.5km on 1/4mile away from the cop) I stopped getting Ka reception . At this point I turned around and headed backtowards the cop to see how the front on performance was.
Facing the cop car at 500m, I was already getting 2 bars on my STi display.
I was happy with the detection as you can see the rail bridge was completely upstructing LOS view to the cop. (The road dips to go underneath the rail bridge)