Automatic Fast-A new radar gun feature that shows the fastest vehicle in a group.

Automatic Fast Lock-Lets the officer lock in the middle window of the moving radar the fastest vehicle in a group.

Auto Mute-A radar detectors feature automatically reducing the alert sound at specified periods of time.

Barberton v. Jenny-This 2010 Ohio Supreme Court decision ruled the best evidence was a valid visual tracking history of the officer as long as they were trained to estimate speeds and distances absent a radar or laser speed reading. A new Ohio State Law rebutting this decision is pending,  S.B. 280.

Batching Error-Error of older radar guns showing incorrect speed when patrol car rapidly accelerates or decelerates.

Cosine Effect-All radar and laser guns have this effect showing slower speeds of the target vehicle the greater the angle away from the target vehicle.

Digital Compass-Some radar detectors feature a digital compass and report direction with LED or LCD displays.

Digital Signal Processing-Newer radar guns feature, DSP, resulting in faster target reporting time and reduced errors.

Dim/Dark-Radar detector feature allowing operator to dim or completely darken visual information of the radar detector.

Direction Sensing Radar-DSR is a new radar technology allowing officers to only target approaching or receding vehicles.

Doppler Audio-Radar guns inform officers of relative speeds by mimicking their speeds by sound of the radar gun.

Doppler Shift-The scientific principle of radar microwave when the target vehicle produces a different frequency when in motion. Named after Christian Doppler, 1842.

False Alert-A radar detector picks up and alerts to a non-police radar signal usually on X band.

Fast Mode-A new radar gun mode that requires the officer to turn on the “fast mode” identifying the “fastest” vehicle in a group.

Fast Lock-New radar gun feature allowing the operator to lock the speed of the fastest vehicle in a group.

Geiger Effect-Radar detectors visually and audibly report a radar gun’s proximity with ascending or descending visual and audible alerts.

Harmonic Signal Interference-This produces incorrect radar readings by capturing the patrol car’s speed or by pulsed signal amplitude.

High Doppler-The part of the radar beam that determines the speed of the target vehicle.

Highway/City Filter-A signal filter reducing false alerts of radar detectors on X band.

Honeycutt v. Kentucky-This December 1966 case has been used for precedent throughout the country. It ruled, “the officer need not know the physics involved in the radar gun, but must know and been trained to operate the device. The officer should test the radar before each shift for accuracy with calibrated tuning forks.”

Inclement Weather Mode-New laser gun feature allowing targeting of vehicles through the windshield and in rain and snow.

Instant On Radar-The officer triggers momentarily the on/off function of the radar gun.

Inverse Square Rule-The amount of reflected radar signal is inversely proportion to the distance of the target vehicle from the radar gun.

Judicial Notice-This is a legal term meaning that a particular radar or laser speed enforcement system is approved for use in an individual jurisdiction.

Ka Band-Now the most used of the three, approved radar bands transmitting 33.4-36 GHz. The three frequencies are used: 33.8 GHz, 34.7 GHz, 35.5 GHz.

K Band-One of the three radar bands approved by the FCC transmitting at 24.150 GHz. Introduced in the 1970’s.

Ku Band-Used in nine countries in Europe at 13.45 GHz. Approved for U.S. use, but not in use at this time.

Laser-Police now using 904 nanometer, infrared, pulsed laser for speed enforcement with ability to identify one vehicle in a group. Stands for Light Amplification  by Stimulated Emission of Radiation.

Laser ID-Some manufactures call it Laser Signature ID (LSID) as does Whistler. It is a visual representation of what laser gun you are encountering done by memorizing laser gun pulse rates.

Laser Jammers-No federal laws prohibit the device although some states have banned sales, operation, and use.

LIDAR-The letters stand for Light Detection and Ranging. LASER stands for Light Amplification by Stimulated Emission of Radiation.

Live-New feature of radar detectors that allow drivers to transmit locations of enforcement or red lights to other drivers via their cell phone. Available on Escort 9500 ix. 8500 X50, Redline, Beltronics Pro 500 , and Beltronics STi Magnum.

Low Doppler-The part of the radar beam hitting a “hot spot” on the road giving the patrol car’s speed.

Low Speed Combining-Occurs when the radar gun’s low Doppler fails to obtain patrol speed and adds speed to target vehicle speed.

Mark Location-Several radar detectors allow the driver to “Mark” a location for future reference of a false alert or red light/speed camera.

Memory Log®-Term used and feature available in new Pro 4 laser gun that allows officers to use a on-board USB port to download evidence of daily checking the laser.

Mute-A feature of radar detectors allowing the driver to mute the audio alert.

No X, No K-Lets the driver eliminate unwanted radar bands known not to be used in a jurisdiction. Also used to eliminate false alerts usually caused by X band. Some call it Quad-Level Intellishield™ or false alert suppression

Officer Certification-NHTSA standards recommend officers operating police radar and laser guns to be re-certified every three years.

Panning Error-Older analog radar guns were susceptible to this error when rapidly panned from side to side giving the incorrect speed.

Passive Jammers-A bogus definition of the law of physics of a principle failing to jam radar guns.

Photo Radar-Low powered radar angled 22˚ across the highway taking pictures of vehicles exceeding the speed limit.

POP Mode-Extremely fast Ka band radar gun transmission at 67 ms at 33.8 GHz marketed to defeat radar detectors.

Pro Se-This is a legal term meaning the defendant is defending themselves without an attorney.

Pulse Radar-A marketing term of radar detector makers for “Instant On” radar.

RADAR-The letters stand for RAdio Detection and Ranging. Developed by Watson Watt of Great Britain for use in World War II.

RDD Immunity-This makes detectors immune from detection by all RDDs.  RDDs are constantly changing to detect all detectors. Some detectors turn off their radar detection section when they detect a RDD and some are shielded so well as the Beltronics STi TotalShield™ they become invisible to detection.

Radar Jammers-Considered a federal felony to jam or attempt to jam a police radar gun. Many states have their own bans.

Red Light Cameras-Cameras at intersections that take pictures of vehicles not obeying red light of traffic signals.

RFI-Radio Frequency Interference occurs when a radio is keyed next to a radar gun causing incorrect speed reading.

Pulse Repetition Frequency-Reports the pulses of laser per second, pps, of laser guns.

S Band-The first radar band used for speed enforcement at 8.8 GHz. No longer in use.

Safety Alert-One of the two formats of receiving emergency signals on offset K band at 24.100 GHz.

Shadowing Error-When radar’s low Doppler incorrectly adds the speed of large vehicle in front of the police car to target speeds.

Spec Mode-Some radar detector display the exact received radar frequency, i.e. 10.525 GHz., 24.150 GHz, 34.7 GHz, etc.

Spectre-A new radar detector, detector, RDD.

Speed of Light-Both radar and laser guns transmit at the speed of light at 186,282.4 miles per second.

SRR-Stands for Short Range Radar using low power output K band to warn drivers of vehicles in their blind spot or assist in adaptive cruise control/collision avoidance.

Sweep Error-A common error of laser guns when the light beam hits two separate parts of the vehicle giving an error code.

Tracking Through Lock-New radar and laser guns continue to show changes in target vehicle speed after first speed locked.

SWS-Safety Warning Systems is the second format of “Safety Radar” on offset K band at 24.100 GHz.

VASCAR-A sophisticated stop watch meaning  Visual Average Speed Computer and Recorder. Used in states that do not allow local jurisdictions to use radar or laser.

VG-2-The first radar detector, detector, RDD, looking for 11.55 GHz lo radiation of radar detectors.

VG -2 Alert-A radar detector feature detecting the RDD and warning the driver. Considered a radar detector, detector, detector.

VG-3-No such product exists.

Visual Tracking History-Based on officer’s experience, visually observing a fastest moving vehicle in a group or alone. The Courts consider this to be best evidence.

Wavelength-Whereas radar uses a frequency, laser uses a light wavelength of 904 nanometers, or 94 billionths of a meter.

X Band-One of the first radar bands, little used now transmitting at 10.525 GHz.

Labrador retrievers instinctually retrieve almost anything. Marvin is a favorite known for his uncanny ability retrieving radar gun signals and radar guns. He’s been trained to bring radar detectors to his owner and accompanies the company when it conducts field tests of radar detectors and radar guns. His nickname is “Radar Hound”. His appetite during testing is constant and he begs with “refrigerator” eyes unattended hamburgers and popcorn from test participants. During a recent test, he retrieved four empty pizza boxes from test cars and brought them to base vehicle. He then stacked them on top of one another, sat, puffed his chest out, and demanded praise for his deeds. He helps during clean up after testing by retrieving empty soft drink cans bringing them to trash cans. The participants continually scratch his head and stomach and he follows them where ever they go.


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Radar/Laser Glossary