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  #1  
Old May 14th, 2009
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Default DO NOT test radar detectors side-by-side, explained

It would seem obvious that the best way to compare the capabilities of multiple radar detectors would be to operate them simultaneously in your vehicle, side-by-side, then noting which goes off first.

This couldn't be more wrong. Side-by-side testing of radar detectors should never be done

Here is why:
All radar detectors work by creating an internal signal, or signals, then comparing this signal to the signals which it receives. This internal signal leaks out from the same opening that is used to receive radar signals, the antenna horn. When two operating detectors are placed near each other they can receive this internal signal from the other detector causing erratic behavior such as constant or intermittent falsing and reduced detection range.

Detectors are detectable:
Using specially designed equipment called radar detector detectors (RDDs), police take advantage of these leaked signals to detect radar detectors in areas where their use is regulated. A common misconception is that the detector's case material has an effect on the signal leak. This is not true. All detectors, even metal cased detectors, have a plastic "lense" over the antenna horn area to receive radar signals. The majority of the signal leaks through the antenna horn. A front and rear horn will then leak signals both front and rear making them even easier to be picked up by police RDDs. The only radar detectors that are totally undetectable to police radar detector detectors are those equipped with Escort's patented TotalShield antenna technology. These are: the Passport 9500ci, RedLine, the Beltronics STi Magnum, STi Driver, and the Beltronics STi-R Plus, and STi-R. These were specifically designed by Escort to eliminate radio signal leaks making them invisible to all RDDs, period. You should still not test these models near other detectors because the signal leaked from the other detector will adversely affect their performance.

An alternative test:
A good method to test radar detector sensitivity (range of detection) is by driving towards a known radar signal. First I make sure that each detector is in "highway" mode, separately powered, and detects the radar source. If you can find actual police radar this is ideal because their equipment is constantly calibrated and shouldnt be viewed as a false alert by any detector. Next, drive toward the signal and note the distance at which you received first alert. Your vehicle's tripometer is handy, reset it when you get an alert then log the distance when you pass the radar source. Alternatively you can use a landmark. Repeat this and record the distances for the other detectors making sure each test is as similar as possible to the previous. Take into consideration any obstructions such as semis or other large vehicles, and try to do the tests as soon as possible to each other. Humidity has an effect on radar. A test on a dry day will have different results than when done on a humid day.

The next time that you see a side-by-side radar detector review you will know that the reviewer knows little to nothing about radar technology and that their results are worthless.

Last edited by EscortRadar; June 23rd, 2015 at 10:57 AM. Reason: updated models that are stealth
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  #2  
Old May 23rd, 2009
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^^ Ditto!

And, I would add the following information:

Many new radar detector users erroneously think that they can determine which radar detector leaks more RF signals compared to another radar detector. For example, the RD user might power up both an Escort 8500 X50 and a Cobra radar detector model side-by-side. In this example, the X50 might not produce any false alert from the Cobra, but the Cobra may produce a continuous false alert from the X50. Then the RD user erroneously concludes that his Cobra RD must "leak" less since it didn't set off the X50, when in fact the exact opposite is the truth. Cobras and many other really cheap import brands of radar detectors emit copious amounts of RF radiation compared to the current RD designs being manufactured by Beltronics and Escort. This fact, by the way, also means that Cobras and cheap import radar detectors can be detected by Spectre RDDs at extremely long range in comparison to Bel's and Escort's non-stealth RD models. Why did the X50 not alert to the Cobra? Because Beltronics and Escort RD products feature superb built-in filtering systems and algorithms which allow them to ignore signals from most other brands and models of radar detectors. The Cobra on the other hand has very poor filtering algorithms, and this is why the Cobra produces a false alert to the X50.
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  #3  
Old July 16th, 2009
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Wow what a great thread! Thank you very much for this important (and needed) information
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Old July 17th, 2009
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thanks for the explanations!
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  #5  
Old January 13th, 2010
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Default Side by side

Quote:
Originally Posted by EscortRadar View Post
It would seem obvious that the best way to compare the capabilities of multiple radar detectors would be to operate them simultaneously in your vehicle, side-by-side, then noting which goes off first.

This couldn't be more wrong. Side-by-side testing of radar detectors should never be done

Here is why:
All radar detectors work by creating an internal signal, or signals, then comparing this signal to the signals which it receives. This internal signal leaks out from the same opening that is used to receive radar signals, the antenna horn. When two operating detectors are placed near each other they can receive this internal signal from the other detector causing erratic behavior such as constant or intermittent falsing and reduced detection range.

Detectors are detectable:
Using specially designed equipment called radar detector detectors (RDDs), police take advantage of these leaked signals to detect radar detectors in areas where their use is regulated. A common misconception is that the detector's case material has an effect on the signal leak. This is not true. All detectors, even metal cased detectors, have a plastic "lense" over the antenna horn area to receive radar signals. The majority of the signal leaks through the antenna horn. A front and rear horn will then leak signals both front and rear making them even easier to be picked up by police RDDs. The only radar detectors that are totally undetectable to police radar detector detectors are those equipped with Escort's patented TotalShield antenna technology. These are: the Passport 9500ci, the Beltronics STi, and the Beltronics STi-R. These were specifically designed by Escort to eliminate radio signal leaks making them invisible to all RDDs, period. You should still not test these models near other detectors because of the signal leaked from the other detector.

An alternative test:
A good method to test radar detector sensitivity (range of detection) is by driving towards a known radar signal. First I make sure that each detector is in "highway" mode, separately powered, and detects the radar source. If you can find actual police radar this is ideal because their equipment is constantly calibrated and shouldnt be viewed as a false alert by any detector. Next, drive toward the signal and note the distance at which you received first alert. Your vehicle's tripometer is handy, reset it when you get an alert then log the distance when you pass the radar source. Alternatively you can use a landmark. Repeat this and record the distances for the other detectors making sure each test is as similar as possible to the previous. Take into consideration any obstructions such as semis or other large vehicles, and try to do the tests as soon as possible to each other. Humidity has an effect on radar. A test on a dry day will have different results than when done on a humid day.

The next time that you see a side-by-side radar detector review you will know that the reviewer knows little to nothing about radar technology and that their results are worthless.
Can you test a 9500ci and 9500ix as they really wouldn't be side by side?
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  #6  
Old January 13th, 2010
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Quote:
Originally Posted by wolfgang View Post
Can you test a 9500ci and 9500ix as they really wouldn't be side by side?
As long as the 9500ci's antennas are mounted outside, but lots of people mount then inside, so then of course it would be a no-no...
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  #7  
Old January 8th, 2011
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thanks once again Mr. Escort.....
I just read your post in other thread and now this another treat.... thanks a lot and very good work of u..... not many active admins are found now a days
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  #8  
Old January 9th, 2011
kadafogg kadafogg is offline
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how far away do they need to be i have a redline and v1 have redline on dash far left and v1 mounted high far right of car 3 1/2 feet apart
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  #9  
Old January 9th, 2011
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Quote:
Originally Posted by kadafogg View Post
how far away do they need to be i have a redline and v1 have redline on dash far left and v1 mounted high far right of car 3 1/2 feet apart
Unless you are running 2 M3's (9500ci, RedLine) there will/can be interference. So running a V1 or 9500ix with a RedLine will cause interference. The question is how much interference, and if its an issue causing delayed alerting and falsing.
Most RD's leak to about 400+ ft (except M3's) so 3ft isn't enough, however many have done this and see miner/no interference while others see some interference. Its really up to you.

The only way i have seen virtually no interference is having a non M3 RD like the V1 on the back deck of my car and running a remote 9500ci so the distance between the two are as far as possible and a lot of car is between each antenna.

Her is a great thread showing reaction times between different RD's and also show the kind of interference running 2 RD's together that is unnoticeable without testing. http://escortradarforum.com/forums/s...ead.php?t=1560

Unless you know exactly what running any 2 RD's together will do its really not a good idea to do so. Its very possible the interference between the two can cause no alert at all to some radar shots.



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Last edited by CJR238; January 9th, 2011 at 10:47 AM.
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  #10  
Old June 17th, 2013
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MEM-Tek "The Cobra on the other hand has very poor filtering algorithms, and this is why the Cobra produces a false alert to the X50. "

Yes, no doubt the Cobra has poor filtering but the opposite isn't true. The Escort is STILL producing MANY errant microwave traffic signals. Otherwise the Cobra would detect nothing.
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9500ci, beltronics, reviews, sti, sti-r, testing, totalshield, undetectable

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