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Old November 3rd, 2009
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DiveBumm DiveBumm is offline
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Default List of Acronyms

Below is a list of acronyms I have found being used in this forum. I thought it might be useful to post them as well as their definitions. I know that this is not complete... but it's a start. I will be updating it as I find more information available. If you have suggestions, please PM me and I will amend the list.

BSM: Blind Spot Monitoring. These are technologies that newer vehicles may include that have been designed to warn the driver that another vehicle is behind them in the left lane, but in the blind spot of their rearward facing mirrors. Some BSM systems emit K-band frequencies that are in the same bands used by LEOs, and can trigger false alerts on Radar Detectors. Also see "CAS" and "IVT Filtering".
Source: Vehicle Blind Spot

CAS: Collision Avoidance Systems. This refers to a broad set of In-Vehicle Technologies (IVT) that are coming into broader use in newer vehicles to help the driver avoid accidents. These encompass Blind Sport Monitoring, Autonomous Cruise Control, Lane Departure Warning, Collision Mitigation (aka: Automatic Braking Systems) and other IVT technologies. These, too, can emit K-band frequencies or Laser-like emissions that can trigger false alerts on Radar Detectors.
Source: Collision Avoidance System

CO or C/O – Constantly on or Continually on Radar

FW - Freeway


IO or I/O – Instant On Radar: Is a term associated when a LEO waits until the last possible opportunity and then turns on his or her radar giving the target vehicle no advanced warning. This is done typically when the LEO knows the vehicle is speeding and therefore is less concerned with warning any other vehicles down the road as they have their target in sight.
Source: Speed Trap Hunter

IVT Filtering: In-Vehicle Technology Filtering. This is Escort Radar, Inc.'s proprietary filtering technology that is included in several of Escort's newer radar detectors, including the Max series and the new iX. It is designed to reduce the false alerts caused by the many BSM / CAS technologies now being included in newer vehicles.
Source: Escort Radar

K-Band: The most frequently used radar frequency band: 24.05 - 24.25 GHz. K-band made its appearance in 1978. The first K-band hand-held radar guns could only be used from a stationary position. Later, a "pulsed" version was introduced that could be used from a stationary or moving vehicle. K-band radar waves have a relatively small wavelength. At the power level found in police radar guns, K-band has an effective clocking range of about 1/4 mile. Depending upon terrain (around a corner, over a hill, etc.), K-band waves can be detected from a range of 1/4 mile to 2 miles.

Ka-Band: In 1987 the FCC allocated a frequency on yet another band, Ka, for police radar use. Ka-Band incorporates Ka-band, Ka Wide-Band, and Ka Super Wide-Band.

The FCC later expanded Ka-band radar use to a range of 34.2 to 35.2 GHz. This became known as Ka Wide-Band.
The introduction of the "stalker" radar gun raised the stakes in the detection game. Unlike all previous guns, the Stalker can be FCC licensed for any frequency in the Ka-band between 33.4 GHz to 36.0 GHz, and so cannot be picked up by detectors designed only for X, K, and photo radar. Stalker guns are being used in more than half the country.

In response, manufacturers have developed detectors with "Super wide-band" technology that sweeps all of the Ka-band allocated to radar, as well as providing continued protection against X, K, and photo radar.

Ku-Band: Ku-band radar ranges between 12 and 18 GHz. It is used primarily for satellite communications, in both aerospace and broadcasting. It is used primarily in Europe and not seen much in America. In the radar enforcement realm, Ku is set at 13.45 GHz by the FCC and has only recently been introduced to the U.S. for speed detection.

LEO – Law Enforcement Officer

LOS – Line of Sight: The straight line along which an observer looks or a beam of radiation travels, with the curvature of the earth this is approximately 30 miles maximum.

NOL - Notices of Liability. The New York City Department of Transportation issues Notices of Liability (NOLs) to vehicles photographed going through red lights.
Source: NYC Finance

PM - Private Message

POP Radar - MPH Industries first introduced POP radar technology (also known as the Super Bee) in its radar guns in 1999 as a way to defeat radar detectors. Today MPH's radar guns while operating in POP mode, can defeat over 85% of the radar detectors in use today.

POP mode works by sending out a quick burst of pulse radar at approximately 67 milliseconds. MPH Industries admits that while in this mode, that the displayed speed of a vehicle may not be accurate. They recommend that the officer only use this mode to obtain an estimate of speed from the target vehicle, establish a vehicle tracking history, and then switch to normal mode to obtain the exact speed.

Therefore POP mode is seldom, if ever used by law enforcement and should not be a major concern as an "important feature" in considering your radar detector.
In fact, most radar detectors that have the POP mode have it disabled by default, as activating POP on detectors, opens it up to receive a false alerts.
Source: Radar Busters

PSL – Posted Speed Limit

RD – Radar Detector

RDD – Radar Detector Detector: All radar detectors leak a small amount of signal that police can detect by using a "Radar Detector Detector" Spectre (RDD). In states, provinces, or countries where radar detectors are prohibited police often use the Spectre RDD.
The first RDD's (VG-2's) were designed to detect and reveal radar detector presence by recognizing its tuning oscillator.* Radar detector companies struck back by moving their tuning frequency outside this scanned area, making their units "VG-2 Proof". All was well until Stealth Micro Systems developed the Spectre.
Source: RadarBusters

QT – Quick Trigger: Is a technique where a LEO may quickly trigger a radar (on then off) to check the speed of an oncoming vehicle while attempting to not alert detectors that may be in vehicles further down the road. QT is basically a manual version of POP as it is controlled by a human rather than a microprocessor. QT time can range from approx .5 seconds to 1 second as each attempt may vary due to the human condition.
Source: Speed Trap Hunter

Rabbit - A car in front of you at a good distance is known as a Rabbit. If the LEO “shoots” the RABBIT you will be alerted by your RD of the LEO’s presence and give you time to slow down.

RLC – Red Light Camera

RVM - Rear View Mirror

SC – Speed Camera

"Stalker" Radar Gun - A hand-held, stationary radar gun that can be set to operate anywhere on the Ka-band between 33.4 and 36.0 GHz. Radar detectors must be able to scan a range of frequencies to detect it. These are referred to as Super Wide-Band Detectors — the latest generation of radar detectors specifically designed to pick up X, K, and the full range of Ka-band frequencies.
Source: Crutchfield

TSR - Traffic Sensor Rejection, is specifically for filtering traffic sensors that cause radar detectors to continuously alert on K band. These traffic sensors are typically set up on highways in series so that there is a prolonged distance of this K-band falsing. When enabled (TSR filtering is OFF by default) our TSR software will recognize and not alert to these sensors while still alerting to other radar signals as normal.
Note: A partial list of cities with Traffic Flow Radar can be found here.

X-Band: The first frequency band allocated for police radar: 10.5 - 10.55 GHz. Dating from the 1950s, X-band radar is the easiest to detect because of its lower frequency and higher power output. Depending on terrain, temperature and humidity, X-band radar can be detected from a distance of 2 to 4 miles, yet it can only take accurate readings of speed from a distance of 1/2 mile or less.

Unfortunately, police radar is not the only source of X-band signals. Garage door openers, microwave intrusion alarms, microwave towers, and other high-tech equipment can fool a radar detector into giving off an X-band alert. Filters and redundant sampling are used to combat this "falsing."

Last edited by flylow7f39; October 8th, 2017 at 10:17 AM. Reason: Added definitions for BSM, CAS and IVT Filtering, with references.
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Old November 3rd, 2009
REBinc REBinc is offline
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I believe your definition of QT is wrong.
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Old November 3rd, 2009
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EscortRadar EscortRadar is offline
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Stickied, thanks DiveBumm!

REBInc is correct.

QT is quickly toggling or triggering the transmit button as fast as you can to get a speed reading with little regard to a Doppler tone and/or tracking history being obtained.

Also there are Ka IO guns, not just K.

I'll let this post sit here for a few days and be nitpicked and edited, then I'll copy it to the General Detector forum

Last edited by EscortRadar; November 3rd, 2009 at 03:22 PM.
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Old November 3rd, 2009
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DiveBumm DiveBumm is offline
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Originally Posted by REBinc View Post
I believe your definition of QT is wrong.
Did a little more research and... found more information on the subject. Thanks for bringing it to my attention.

Last edited by DiveBumm; November 3rd, 2009 at 07:35 PM.
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Old November 8th, 2009
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NoBama NoBama is offline
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Default add NOL

NOL: Notice of liability. nyc's notice of running a red light camera. which i just received in the mail. new cameras keep cropping up daily off pelham pky in the bronx.
Go Yankees!
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Old November 13th, 2009
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RABBIT- Having a car in front of you at a good distance is known as a RABBIT. If the LEO “shoots” the RABBIT you will be alerted by your RD of the LEO’s presence and give you time to slow down.

RVM- Rear View Mirror

The different types of LEO KA radar frequency’s (great to know when using Spec mode):

33.8 GHz - 34.7 GHz - 35.5 GHz - 35.5 GHz.

And K band LEO radar frequency:

K-Band 24.150 GHz

Moving mode & Stationary mode:

Radar from a gun can get your speed in the best conditions at approximately a maximum of 3000ft in moving mode, and approximately a maximum 5500ft in stationary mode (dependant on weather). In most cases moving radar has about the distance of stationary radar so the reaction from a RD will be different.
Alert distances in the 1/2mi to 1mi are common, but most RD's can pick up a LEO's radar much further than they can acquire your speed.
To embrace technology is not to blindly accept it. We must always question and test technology but never be afraid to use it.

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Old April 19th, 2012
rosiemov rosiemov is offline
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This information works well and got attension towards this.
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Old January 27th, 2017
GumbyDammit223 GumbyDammit223 is offline
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Perhaps add BSM - Blind Spot Monitor(ing)?
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Old January 27th, 2017
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TBNTX TBNTX is offline
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Originally Posted by GumbyDammit223 View Post
Perhaps add BSM - Blind Spot Monitor(ing)?
Good Idea. I've added it to the FAQ, as well as adding CAS and IVT Filtering.


Radar Detectors: Max 360c, Redline EX, Max 360, & others plus Escort Live!
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Last edited by TBNTX; January 27th, 2017 at 03:54 PM.
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Old January 27th, 2017
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BelsCortFan BelsCortFan is offline
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Originally Posted by TBNTX View Post
Good Idea. I've added it to the FAQ, as well as adding CAS and IVT Filtering.
and BSRDR which is a common forum term for Band Segmentation Radar Detector Rejection for M3 units that can be "segged."
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