Question about Passport 8500 X50 Radar Detector

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How do cops not get detected by the radar?

I see many cops in front of me sometimes and it dosent even ring at all maybe its damage or ive heard because of H.I.D's it may cause a jam if im right?

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Radar detectors usually look for a specific type of signal. Most likely, while the cop is driving around he may not have his radar on, so the detector will not be able to isolate and pinpoint the signal that is needed to activate the alarm to notify you.

Posted on Apr 22, 2009

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I have a Rocky Mountain KAT-TRAXX Radar.laser. g-force, it will not go go to Radar detector mode when I turn it on or when I try to select Radar mode. This option is gone


Lol fake so you are telling me that whenmine detects cops from miles away its lying even though I see them. Read the description *******! He had the Kat Traxx. That unit does not have a radar scrambler or claim it does. It has a laser scrambler which by the way are still active scramblers and laser scramblers are still legal. As for your problem, call Rocky mountain radar they are helpful and will talk to you to try and fix it if not you can send it in to them and they fix it for you.

Nov 09, 2011 | KAT-TRAXX Radar Detector

1 Answer

What does K1 mean?


The letters X, K, and Ka designate radar frequency bands used by radar based speed monitors. The letters correspond to designations given by Federal Communication Comission (FCC) frequency bands reserved for speed monitor equipment.
  • X band - 10.525 GHz
  • K band - 24.150 GHz
  • Ka band - 33.4 ... 36 GHz
The number (range is 1 ... 5) is the radar signal strength, where 1 indicates weakest signal (you are still at some distance, or maybe false alarm) while at 5 you should be able to see the white in the eye of the cop holding the radar gun.

The letter V indicates the detection of a "Detector Detector". Devices like the Cobra are illegal in some countries and police has counter-measures available to detect some radar detectors. The maker of the Cobra states, their products go unnoticed but that won't help you if highway patrol sees the thing sticking on your windshield.

The letter S indicates hazard warnings (like train crossings).

Finally, L indicates detection of a LASER based velocity detector.

Jan 05, 2011 | 12-Band Radar/Laser Detector

1 Answer

I have the cobra xrs 9345 that my friend borrowed and when i got it back in plugged it in it just shows and 8 on the screen is there anyway i can get it back to normal?


hello my name is kenrik. About a year i bought a radar detector everything work good for like 8 month after that my radar don't make any detection i went by a cop using a laser gun and the radar didn't detect anything so what i can do ?
the model is cobra xrs 9345

Oct 01, 2010 | Electronics XRS9345 Radar Detector

1 Answer

Doesn't detect all cops.


i drove right past highway patrol with radar gun pinter at me and it didn't make a sound...its garbage..dont buy

Jul 09, 2010 | XRS 9330 Radar Detector

2 Answers

I was travelling at a high speed and a cop was hiding behind a pillar with a laser gun.My escort suddonly started squeeling loudly (not slowly working its way to a stronger signal/noise level) i...


It's called "Instant on" doppler radar. It's purpose is to defeat radar detectors and as you saw, it can. The system is powered down while the cop is sitting there watching traffic. When he sees someone he thinks is speeding he just taps a button and the unit emits a brief burst of radar and shuts off again. And just that quick he's got your speed. There are some radar detectors that say they can detect these too, but I wouldn't know how truthful that is.

Oct 14, 2009 | Passport 8500 X50 Radar Detector

3 Answers

I HAD 8500 SERIES FOR 4 YEARS , WITH NO PROBLEMS. WAS RECENTLY PULLED OVER AND TOLD BY COP HE DETECTED MY DETECTOR.HE WAS COOL , HE TOLD ME I SHOULD UPGRADE TO 9500 SERIES. CAN THE 8500 SERIES BE DETECTED...


Radar detectors use what's called a superheterodyne receiver to tune in the high frequency radar signals. A side effect of this design is that they emit a small radio signal at a predictable frequency, and thus devices like the Spectre can detect them. States like Virginia (where radar detectors are illegal, f*** that state btw) equip their patrol cars with Spectres to find those of us who use them. Many commercial enforcement vehicles also have them, since it is illegal at the federal level for any vehicle requiring a commercial driver's license to have a radar detector.

The only detectors on the market now which are known to not be detectable by the latest Spectre IV units are the Bel STi Driver and the Escort Passport 9500ci. Note that this is not the standalone 9500i/9500xi unit, but the full custom installed unit with laser jamming.

If you're not one of those unfortunate enough to live in Virginia, I wouldn't bother. If you do live in VA, get the STI Driver.

Jun 29, 2009 | Passport 8500 Radar Detector

1 Answer

I dont understand


That may be because he does not have his radar unit activated. Radar units work by sending out a microwave signal. It bounces off your car and back to the unit. It then calculates the whole distance over time thing and figures out your speed...it's more complicated than that, but I don't feel like giving a class...and I'm not a real genius anyway when it comes to physics and whatever other -ics are involved with the science of radar. Point is...radar units have a hold function..kinda like turning that microwave beam on and off...when the officer has the radar on "hold" there is no beam coming out..which means, there is nothing for your radar detector to detect. When he takes it off hold to clock your speed, the magic beam shoots out, bounces off your car, and returns to the unit..then tells the officer your speed...by the time your radar detector actually lets you know you're being clocked, Mr. Officer is already turning around to come pull you over. Hence the reason radar detectors are a waste of money...but then again, there are plenty of cops that ride around with the the sending out a signal all day and never actually put it on hold...if a cop is using the radar properly, the radar detector in your car will not help you...but, not everyone does what they are supposed to do, so therefore, it may save you from one or two tickets.
Now, the reason it doesn't alert you when the police are right in front of you is because either the police in front of you; A)do not have a radar, B)do not have their radar on, C)they have it on "hold" and are not transmitting a signal, or D)your radar detector is broken and you need to get it fixed or replaced.

Jan 11, 2009 | XRS 9540 Radar Detector

3 Answers

Radar detector


the higher the number the stronger the signal.

Jun 06, 2008 | Vehicle Parts & Accessories

3 Answers

I have a cobra radar dector esd 737 and i sdoesnt pick up cops tell they are like not even a half a mile ahead of you and tips or ideas how to get it to work better


Detecting of radar or lidar emissions depends on mounting of detector.In My experience it is best to mount it just above windscreen wipers.You must check if your detector is visible from license plate level. This is important for laser detection. For other measuring devices it's only important to be visible.Higher mounting facing downwards will reduce false X and K/Ka signals.It will reduce detecing of true as well, so it is all up to you.You must know that laser detecting only covers your car.It d'ont matter if a cop is 300m or 1800m away.X band has a large emission, and it is easily detected.K/Ka band is a pulse emitting and has a lot narrow detecting point.It is effective at max 800m.In ether case speed can be reduced 20-30 km/h in city, and 30-50 km/h on highway.

Apr 25, 2008 | ESD 7000 Radar Detector

2 Answers

Rocky Mountain Radar detecter!


laser is vdery hard to detect and the detector has to be level! See www.radardetector.net forum for more laser info.

Dec 26, 2007 | Vehicle Parts & Accessories

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