sensitivity/filtering diffrence?

[zappy]

Imagine if you could subtract the last 2 bars completely (they are useless anyway because they are passed 30 degrees).

??? So you think all roads are straight and/or enforcement occurs only on straight sections of road? Radar can and is used beyond a 30 degrees angle to the road, and forget advanced detection around a curve. Tunnel vision is a bad thing when it comes to detection, unless you want detection after the fact.

[djrams80]

Imagine if you could subtract the last 2 bars completely (they are useless anyway because they are passed 30 degrees).

??? So you think all roads are straight and/or enforcement occurs only on straight sections of road? Radar can and is used beyond a 30 degrees angle to the road, and forget advanced detection around a curve. Tunnel vision is a bad thing when it comes to detection, unless you want detection after the fact.

Check Again. The 9500i does just fine in the "around the curve" tests on both K and Ka.

http://www.guysoflidar.com/august-20...ctor-test.html

[zappy]

Re-read what I was posting to, you missed the point.

[CJR238]

Sensitivity around a curve is obviously important, and tunnel vision is real bad. But radar passed 30 degrees shows only 80% of your speed or less. And radar can only go in striate lines.
Up to a 30 degree sensitivity at over 3000ft will almost be at least a few hundred feet wide span to receive radar. More tan enough to receive radar around a curve. Most radar around a curve received is from reflections too.

The radar passed 30degrees in the above picture is only being received at a few hundred feet anyway.

See the below RD on the far left has tunnel vision, that’s bad. But the 2nd 3rd and 4th to the left of the 1st one has good detection range and off axis to 30 degrees, but is not as sensitive to off axis radar passed 30 degrees.

[CJR238]

Re-read what I was posting to, you missed the point.

Thanks for challenging my theory. I find the idea of filtering/sensitivity an interesting topic because I feel they can be 2 different things. I feel that a RD can be made to detect extremely far with out being over sensitive by filtering in some way.

[o2bad455]

Sensitivity around a curve is obviously important, and tunnel vision is real bad. But radar passed 30 degrees shows only 80% of your speed or less. And radar can only go in striate lines.

Some of us have to traverse Interstates with curves. Some curves are already 30 degrees, and a LEO shooting from the inside only adds to that angle. Our best hope against I/O is that we'll get an early warning from the traffic ahead. Thus, a LEO at less than 30 degrees to the current target is often at more than 30 degrees to the driver (next target). In such cases, reducing off-axis sensitivity is not the best answer. Actually, I would prefer if off-axis sensitivity were increased and that faster and more sophisticated filtering based on harmonics be performed. You've made an interesting point about allowing the off-axis sensitivity to be user adjustable (so we can adjust for the terrain), but unless you've got a novel idea in mind, I think that such a feature would only be possible at an extremely high price.

[CJR238]

Wow CJR238 couldn't have made a point clearer. I read on the V1 postings about how fast people drive with a V1, and some said at the PSL or maybe 5 over. Your point about how much distance do you really need is something most people don't point out.

Thanks. :wink: knowing the distance of an actual radar gun can get your speed is important. The longest distance I have seen on a radar gun is 3500ft but in most cases it’s much less 2000-2500ft. besides the fact that the LEO needs to be able to make out who is speeding and anything 3000ft would be difficult.