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  1. #11
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by Clay_in_Nashville View Post
    Quote Originally Posted by nyjason13 View Post
    No, he was facing me. The antenna was pointed right at me actually
    But just becuase there is an antenna facing you doesn't mean it was turned on. Believe me. Your 9500ix wouldn't miss constant on 34.7 without eating it up (like most detectors do). The ix is one of the best at 34.7 behind only the V1 and STi possibly.

    X2, the 9500ix is great on 34.7. there are way to many things to take into account when having a scenario like this.

    nyjason13, all outside mount stalkers have 2 antennas so though it may be facing you it may not be monitoring that direction. Any RD will react the same with some slight variation.

    34.7 is also a pretty narrow radar signal so unless its almost directly facing you its hard to pick up.

    Just look at this video, all RD's can have odd scenarios happen:


    [ame="http://video.google.com/videoplay?docid=1425657934141764712&q=azonehits&ei =aimFSP_QFoTErwKX9tXLBw"]9500i vs V1[/ame]

  2. #12
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by CJR238 View Post
    Quote Originally Posted by Clay_in_Nashville View Post
    Quote Originally Posted by nyjason13 View Post
    No, he was facing me. The antenna was pointed right at me actually
    But just becuase there is an antenna facing you doesn't mean it was turned on. Believe me. Your 9500ix wouldn't miss constant on 34.7 without eating it up (like most detectors do). The ix is one of the best at 34.7 behind only the V1 and STi possibly.

    X2, the 9500ix is great on 34.7. there are way to many things to take into account when having a scenario like this.

    nyjason13, all outside mount stalkers have 2 antennas so though it may be facing you it may not be monitoring that direction. Any RD will react the same with some slight variation.

    34.7 is also a pretty narrow radar signal so unless its almost directly facing you its hard to pick up.

    Just look at this video, all RD's can have odd scenarios happen:


    [ame="http://video.google.com/videoplay?docid=1425657934141764712&q=azonehits&ei =aimFSP_QFoTErwKX9tXLBw"]9500i vs V1[/ame]
    And because its so narrow, the gun would have to be facing right at you to get an accurate reading? If the LEO gets a reading on me before my RD picks up even the weakest of that signal, isn't that a little pointless in terms of having a RD?

    Nice video btw

  3. #13
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    Default Re: Ka 34.7 delay. Is this normal?

    These type of encounters can occur by the antenna facing straight down on the dash or way off axis.

  4. #14
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by nyj[COLOR=#3a3a3a
    a[/color]son13;581015]
    And because its so narrow, the gun would have to be facing right at you to get an accurate reading?
    yes, pretty much line of sight for the radar gun. In your case im almost 100% sure the radar was shooting the other way. So he would have no reading till you passed.

    Radar from a gun can acquire your speed in most conditions at approximately a maximum of 3000ft in moving mode, and a maximum 5500ft in stationary mode with no obstructions and a direct line of sight.
    Radar is pretty much line of sight and to a certain distance (cone shaped from the LEO out). So your RD can pick up reflections and his radar way before he can get your speed, but not if its facing the other way or way of axis.
    Off axis is a factor for the LEO to get our speed. For signals passed 35 degrees the speed read out decreases for the LEO. this is called “Cosine error/effect” any radar more than 40 degrees off axis will show less than ~80% of your speed. For example if you are going 70 in a 55 zone and the LEO’s radar is 40 degrees off axis, his radar will show only 56mph.


    [font=Verdana]
    Quote Originally Posted by nyj[/font
    ason13;581015] If the LEO gets a reading on me before my RD picks up even the weakest of that signal, isn't that a little pointless in terms of having a RD?
    It would be, but that’s not what would be happening, and his weak signal would not return him your speed.

    Basically his radar needs to be facing you, with minimal off axis, and as little obstruction as possible. In the end he needs a direct reflection of his radar back to his gun to attain your speed. If its facing the other way or he’s ~40+ degrees or more off axis it doesn’t do him much good.
    Last edited by CJR238; 07-27-2009 at 10:21 AM.

  5. #15
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    Default Re: Ka 34.7 delay. Is this normal?

    Just guessing here, but i think the 9500 series is so good on Ka band that it can pick up a gun on standby under certain circumstances. This happened to me once a couple of years ago (9500i). And almost exactly the same scenario as nyjason, except i was approaching the LEO from behind. Very weak signal, and he citing someone already. I think the gun was on standby. A couple of blocks down the road, he must have turned it back on, because the 9500i went crazy on the same frequency. I pulled over into a gas station to see if it was the LEO i had encountered, and it was.

  6. #16
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by CJR238 View Post
    Quote Originally Posted by Clay_in_Nashville View Post
    Quote Originally Posted by nyjason13 View Post
    No, he was facing me. The antenna was pointed right at me actually
    But just becuase there is an antenna facing you doesn't mean it was turned on. Believe me. Your 9500ix wouldn't miss constant on 34.7 without eating it up (like most detectors do). The ix is one of the best at 34.7 behind only the V1 and STi possibly.

    X2, the 9500ix is great on 34.7. there are way to many things to take into account when having a scenario like this.

    nyjason13, all outside mount stalkers have 2 antennas so though it may be facing you it may not be monitoring that direction. Any RD will react the same with some slight variation.

    34.7 is also a pretty narrow radar signal so unless its almost directly facing you its hard to pick up.

    Just look at this video, all RD's can have odd scenarios happen:


    [ame="http://video.google.com/videoplay?docid=1425657934141764712&q=azonehits&ei =aimFSP_QFoTErwKX9tXLBw"]9500i vs V1[/ame]
    Don't you mean 35.5?

  7. #17
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by seejay1120 View Post
    Just guessing here, but i think the 9500 series is so good on Ka band that it can pick up a gun on standby under certain circumstances. This happened to me once a couple of years ago (9500i). And almost exactly the same scenario as nyjason, except i was approaching the LEO from behind. Very weak signal, and he citing someone already. I think the gun was on standby. A couple of blocks down the road, he must have turned it back on, because the 9500i went crazy on the same frequency. I pulled over into a gas station to see if it was the LEO i had encountered, and it was.
    Now that is something I haven't heard. Interesting!

  8. #18
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by seejay1120 View Post
    Just guessing here, but i think the 9500 series is so good on Ka band that it can pick up a gun on standby under certain circumstances. This happened to me once a couple of years ago (9500i). And almost exactly the same scenario as nyjason, except i was approaching the LEO from behind. Very weak signal, and he citing someone already. I think the gun was on standby. A couple of blocks down the road, he must have turned it back on, because the 9500i went crazy on the same frequency. I pulled over into a gas station to see if it was the LEO i had encountered, and it was.
    There are no US radar guns that have such a thing as a detectable standby mode. The gun is either transmitting, or it's not.

  9. #19
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by djrams80 View Post
    Quote Originally Posted by seejay1120 View Post
    Just guessing here, but i think the 9500 series is so good on Ka band that it can pick up a gun on standby under certain circumstances. This happened to me once a couple of years ago (9500i). And almost exactly the same scenario as nyjason, except i was approaching the LEO from behind. Very weak signal, and he citing someone already. I think the gun was on standby. A couple of blocks down the road, he must have turned it back on, because the 9500i went crazy on the same frequency. I pulled over into a gas station to see if it was the LEO i had encountered, and it was.
    There are no US radar guns that have such a thing as a detectable standby mode. The gun is either transmitting, or it's not.
    Sorry for the misunderstanding, but I did not mean that. What i meant by "standby" was that the gun was on, but not transmitting. Is it is possible that some guns may "leak" just enough signal to set off a good detector? I cannot remember where i read this, but if i remember it correctly, some older Ka units had stability problems in their design and kept some of the RF transmitter section "heated" to mitigate them.

  10. #20
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    Default Re: Ka 34.7 delay. Is this normal?

    Quote Originally Posted by seejay1120 View Post
    Sorry for the misunderstanding, but I did not mean that. What i meant by "standby" was that the gun was on, but not transmitting. Is it is possible that some guns may "leak" just enough signal to set off a good detector? I cannot remember where i read this, but if i remember it correctly, some older Ka units had stability problems in their design and kept some of the RF transmitter section "heated" to mitigate them.
    Modern radar guns do not leak. I'm not sure about guns that would be as old as what you're talking about, but any Ka band guns used today are certainly recent enough to not fall under the catergory of needing a warmup period of any kind.

 

 

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