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  1. #1
    Good Citizen
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    Jun 2005
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    Dallas
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    179

    Default For everyone who's RD "didn't go off"

    I keep hearing countless stories of people getting pulled over and then wanting to know why their RD didnt go off. It's time to address the issues. Ive been doing alot of testing and these are my findings. The three main reasons are...

    1. Your RD sucks. This is usually the 80% of the time. Face it, you really dont know if there is a delay between the transmission and when your RD goes off. I tested a BRAND NEW OUT OF THE BOX 8500 x50 that wouldent alert to my k-band radar gun unless I held the trigger more than a sec. I could tap the trigger, get the speed, and the x50 never even peeped. The owner was pissed. Same thing with my cobra. Same thing with my friends V1 (yes, the V1). Basically, even two identical models dont give you the same results. My v1 worked fine. When I told him the results he said "well, it dosent do that on Ka band". I said, "Oh, really, and how do you know? Did you try it with a Ka band gun?" The point is that you need to test your RD with a real radar gun. Otherwise, for all you know, there could be a 2 sec delay before it goes off. And I can hit the trigger, get your speed, and stop transmitting all fast enough for the RD to never even go off. Its really scarry. I even had an old skool RoadPatrol XK that would go off when i bursted the radar, however the x50 wouldent. Dont get me wrong, all the units i tested would eventually alert to radar if i held down long enough. but some were up to 3-4 sec. If i was running a speed trap, why would i hold down for 3-4 sec, i would zap you in 1. I can continue to zap cars each for 1 sec and you wont get any advanced warning. Then you are next. I'm not trashing detectors at all. My point is that i tested 2 or more of EACH model, (two x50s, two bel 980s, three V1s, two cobra 9800s) and each one had VERY different results. Just cause you have a top 3 RD dosent mean its working as it should.
    2. It was laser, and your RD didnt catch it. This is prob the case 9% of the time. Your laser detector either isnt sensitive enough to catch it when it hit the RD, or the officer was very steady and kept the beam off of your RD.
    3. It was VASCAR and you didn't notice it. I highly doubt it.

  2. #2
    Radar Fanatic
    Join Date
    Feb 2005
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    Earth
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    2,357

    Default

    I think the reports that bug me the most are accounts of a radar detector not going off and yet it goes off for automatic doors :? . I really want to believe that these reports are rare and I have nothing to worry about. But it keeps creeping up on me that maybe, just maybe there's another reason that I see SO MANY patrol cars without getting an alert at all. So here's the big question: how do we ensure that our equipment really is working the way we expect it to?

  3. #3
    Professional
    Join Date
    Jun 2005
    Location
    Lufkin, TX
    Posts
    881

    Default

    I've often wondered that too. It's almost next to impossible to know. Sometimes it's frustrating and some days I am not confident in my detector at all and wonder why the heck I even have one.

    I would like to think that LEO's don't run radar all the time, hence, you wouldn't get an alert. That is my explanation for not getting an alert when passing a LEO. But like you said brick, you can never know for sure. You'd have to be able to see the unit in the car or not and see if it's on or off.

  4. #4
    Good Citizen
    Join Date
    Jun 2005
    Location
    Dallas
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    179

    Default

    I KNOW!!!! Sorry, it is VERY frustrating isnt it!! We really, don't know do we...................

  5. #5
    Good Citizen
    Join Date
    Jun 2005
    Location
    Dallas
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    179

    Default

    and the worst part is that you really cant rely on "tests" that much. Cause they didnt test YOUR RD, they tested your MODEL. I think everyone should buy even just a cheap little bushnell gun, just so they can know better.
    Andrew

  6. #6
    Professional
    Join Date
    Jun 2005
    Location
    Lufkin, TX
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    881

    Default

    and the tests seem so inconsistant too...that's also frustrating.

  7. #7
    Yoda of Radar
    Join Date
    Dec 2004
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    In front of my computer
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    Default

    What is probably MOST frustrating is all the reports of "weird" performance with the Valentine One as of late. With Ka "Junking", K-band oddities and of course the occasional laser miss it seems the V1 isn't nearly as faultproof as it was 10 years ago. :?

  8. #8
    Radar Fanatic
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    Feb 2005
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    Earth
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    Default

    Quote Originally Posted by SmaartAasSaabr
    What is probably MOST frustrating is all the reports of "weird" performance with the Valentine One as of late. With Ka "Junking", K-band oddities and of course the occasional laser miss it seems the V1 isn't nearly as faultproof as it was 10 years ago. :?
    I don't know that the Ka "J" issues is really that important. I haven't experienced it but it sounds like it doesn't happen until you are on top of the cop. Annoying? Sure. A threat to your protection? Not as long as you keep your head out of your you-know-where. It's just the K-band doubts that bug me.

  9. #9
    Yoda of Radar
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    Dec 2004
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    Default

    Of course. But it raises "doubt" in the unit... :?

  10. #10
    Manufacturer
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    Jun 2005
    Location
    Massachusetts
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    1,263

    Default

    The reason why the Bel, Escort, and Cobra do not respond until almost 1 second is due to the software rules they have chosen to make an attempt to try and determine if the signal was due to another radar detector.

    This is all because the Cobra and Uniden models altered their frequency plans back when Cobra came out with the 9 Band unit. When they did this, they did 2 things.

    1st they opend up Pandoras box with the VSAT people and now all radar detectors have to be FCC compliant.

    2nd they envoked a CW and sweept 1st LO. the CW was at 12.15Ghz and 11.8Ghz.
    What do you think the 2nd harmonic of 12.15 is? K BAND!
    What do you think the 3rd harmonic of 11.8 is? Ka BAND!

    Now what do you suppose a radar detector is supposed to do well? Give up! It is supposed to detect CW police radar. What do you think happens when you encounter other radar detectors that are using CW as part of their LO? Give up? Excessive falsing.

    Because of this Bel, Escort and Cobra wait to see if the CW goes away. Approx 1/2 second before deciding if they are going to respond.

    Check out the Whistler POP models. They respond in less than 67ms to 33.8 and K band. They also respond in 150ms or less to X, 34.7 and 35.5Ghz police radar frequency. SML Immediacy of response test results are incorrect with regard to the Whistler.

    Test it for yourself and see.

 

 

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