R3 stays quiet on laser?

Discussion in 'Uniden' started by Nasty618, Feb 3, 2018.

  1. infiniti

    infiniti Premium Member Advanced User Premium Member

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    Welcome to the forum. There are highly experienced experts in the midst...really helped me up my game.
     
  2. Nasty618

    Nasty618 Learning to Drive General User

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    Back to our comments about how Uniden handles laser wavelengths.
    • R1/R3 detect laser 800 nm-1100 nm.
    • Bushnell rangefinders use 905 nm lasers, in the infrared spectrum.
    So in theory, it is smack in the middle of the Uniden's detection range and it should have no problem seeing it, even if laser detection is its weakest point... I cant think of an answer as to WHY the R3 is not alerting to it at basically a point blank range... other than the beam pulse argument?
     
    Last edited: Feb 8, 2018
  3. CJR238

    CJR238 -CMS Article Admin- Administrator Advanced User Premium Member

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    Im sure you have seen how laser pointers beam are very small. Same with Lidar guns. And a RD will only detect it if its a direct hit, or happens to pick up scatter.

    Jammer heads are mounted in the grill for a reason as well.
     
  4. Nasty618

    Nasty618 Learning to Drive General User

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    Indeed! I tried to tailor the tests (if you will) to account for that - checked for scatter as well as targeting the right spots on all RDs i had available to me. The other RDs were able to detect and alerted with the same test conditions - both scatter and direct hits...
     
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  5. embellisher

    embellisher Learning to Fly Beginner User

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    I think that most of us understand that most detectors will only pick up a direct hit. The OP used his Lidar scope at point blank distance, and it falls within the frequency range detected by the R3s Lidar detection, according to Uniden's specs.

    So the question remains, why did the R3 not detect it?
     
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  6. Napster

    Napster Learning to Drive General User

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    Uniden has programmed in the pulse rate of legitimate laser sources so im sure there are a few range finders that arn't a close enough pulse rate to police laser to set it off.. Other detectors are not programmed to certain pulse rates and instead search for ANY pulsing IR source. they will likely go off to your TV remotes or even the IR proximity sensor on your smart phone (Redline does this).. All that said the R series have poor Laser sensitivity anyways so don't count on it to defend you from laser.
     
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  7. Nasty618

    Nasty618 Learning to Drive General User

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    Can you point out the source of this info? IIRC, in earlier posts here and in some other threads this was suggested as a possible answer to our questions "Why doesnt the R1/R3 react to some home brewed tests with non LEO Lidar." That possible answer was - a logic of sorts that Uniden uses to identify and alert to a valid LE laser. I was hoping someone with the insights to the technology behind the unit could confirm that...
    But the consensus is - our units are just not great at detecting LE laser.

    I just really wish people would stop using that type of a statement as a closing argument in a discussion that is not even in the realm of "Can i use my RD to protect me from laser?". It's just not relevant.
     
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  8. NVR2FST

    NVR2FST PSL +15 Advanced User

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    Had my first two lidar hits with the R3 last night. Given the source, it was most likely an Ultralight, being used by local P.D. Doubt it would have saved me, though. Nice to know it works, however.

    Posted from my Studio XL 2 using the RDF Mobile App!
     
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  9. Nasty618

    Nasty618 Learning to Drive General User

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    Any estimate on the distance to/from the LEO?
     
  10. NVR2FST

    NVR2FST PSL +15 Advanced User

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    Maybe 100 meters. It was close.

    Sent from my Studio XL 2 using Tapatalk [​IMG]
     
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  11. Napster

    Napster Learning to Drive General User

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    The source is me using some common sense and a laser tester! I tested with a laser testing remote that has the pulse rates of police laser programmed into it as well as a random pulse button marked as "other" The R3 ONLY goes off to genuine modes but not "other" and using a universal remote with hundreds of TVs programmed into it with varying pulse rates for their signal NEVER set off the R3 for me. This is the same laser testing remote that Vortex uses in a few of his videos.. The Redline on the other hand went off to just about EVERYTHING i aimed at it. You can buy a laser tester like i did and see for yourself that it only goes off for the the specific pulse rates of police laser.

    Drawing a conclusion that Uniden just programs in the pulse rate from this test is quite understandable. Uniden can easily update the database of pulse rates for new types of laser guns and keep things like Your smartphone you set on the dash or the LED taillights of the car in front of you from falsely setting off the laser alert on your detector.
    Im not saying I have the answer from Uniden themselves but i don't think they have invented some complicated algorithm to figure out genuine police guns in some other way. This is a smart and simple way to do it that makes sense and explains why someones Range finder didn't set it off their R3/R1 but sets off other detectors.
     
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  12. Nasty618

    Nasty618 Learning to Drive General User

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    That good info, thank you for sharing your observations. Would you mind tossing a link in here for that remote? and some info on what those police-like pulse rates are?
     

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