Okay, new to all of this and need some knowledge.

in the past with K band i understand they can only get a speed reading while you are coming at them. Not from behind.

what about laser and Ka? are these forms of speed measurement that can be used going the same direction or perpendicular to a car? please help me out here.

i ran across radar at an intersection and he was going east/west while i was going north/south. could he of got a reading depending on radar?

2. ok heres the deal, K, Ka and Laser can ALL get readings off of you whether theyre in front of you or behind you, Laser is usually ONLY when the officer/PC are stopped (Laser guns will show your speed in negative since youre going away but its still accurate)

Perpendicular shots....... IMPOSSIBLE to get a reading, it'll read something but itll say that youre going ZERO mph, as the angle increases the speed they get off you decreases until youre ar 90 degrees and its Zero, thats called Cosine error

as for that experience, he was probably running RADAR or LIDAR aiming down the road, because at that perpendicular angle theres NO WAY he'd get a good reading off of you

but for the most part K and Ka CAN BOTH target you if the PC is behind you or coming at you......or if its a dual antenna RADAR system he can do it if hes the car traveling in front of you even

3. so he would have to have dual antenna's on a K or ka to get a reading going the same direction front or behind.

many years ago, a cop friend of mine said they could only get you coming at them in the opposite direction

4. Originally Posted by chester
so he would have to have dual antenna's on a K or ka to get a reading going the same direction front or behind.

many years ago, a cop friend of mine said they could only get you coming at them in the opposite direction
Dual antennas allows them to clock vehicles to the front or rear of the patrol car. Even with a single antenna, the officer can clock you in front of the patrol car, whether you are approching or receding, and even if the patrol car is moving or stationary. This of course depends on the capability of the radar unit. Older radar units might not have same-lane moving mode and can only clock oncoming vehicles etc...

5. Many years ago, radar could clock only approaching cars while the cruiser (and radar) were moving, but radar could always clock receding vehicles in stationary mode.

So, with older equipment, if the LEO was heading northbound, he could only clock southbound traffic coming toward him. He could clock traffic moving toward or away from him if he was parked though.

Most dashmount radars have, or can be equipped with, front and rear antennas. With dual antennas, the officer can clock traffic either in front of him or behind him, but the traffic had to be going the opposite direction if he was moving.

Some newer radars have a "same lane" feature, which allows moving radar to clock traffic moving the same direction as the LEO. The Stalker Dual can also run front and rear antennas simultaneously (with other units, the LEO had to pick which antenna to run, though he could switch between them at any time). This has nothing to do with whether the gun is K or Ka, but Ka is more common in newer guns, which also have the newer features as well.

Laser can only be used when stationary, but it can clock either approaching or receding traffic.

ALL radars and lasers can't get readings perpendicular to traffic. If you see a cruiser parked sideways running radar or laser, they will have the unit aimed out the side window at approaching (or receding) traffic.

6. Hey jimbonzzz,

Any idea on the percentage of handheld vs mounted Ka guns out there? Once again earlier today I had real bad range on a Hwy patrolman in a SUV. I was within 50' from his rear before the v1 went off, & the v1 dropped off maybe 70-100' ahead of him. Very low signal strength - only thing I could think of was he had a handheld Ka unit on his front seat that he hadn't turned off.

7. You're probably correct there Radar_Dick. Either that or someone with an el crappo (Cobra) drove by at the same time and caused your V1 to false.

8. Can a Stalker Dual, bypass one antenna and only run 1 at a time, like Rear only??

9. i just have a question about being radared at a perpendicular angle. where i live, there is a place where a certain cop likes to sit. its right off the road and he turns his car to where he's facing the road in front of him. (directly perpendicular) well when i am driving to him i dont get anything. i can even see him before i get a reading. but as soon as i get in front of him i get full alert. but my question is, even though my radar detector is going off and he's zapping me, his reading will be inaccurate and unreliable right? and if so, why do u think he does that. (he does it quite often, most people know to slow down when they get to this point)

10. Originally Posted by Arashi666
Can a Stalker Dual, bypass one antenna and only run 1 at a time, like Rear only??
The Stalker Dual can only run one antenna at a time. But since you're asking, I assume you're talking about the Stalker DSR 2X, which is the one that can run both.

With the DSR 2X, they can select front antenna only, or both antennas. They cannot select rear only.

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