Radar Certification

When testing a laser speed measurement device for accuracy, the distance test is considered to pass only if the distance reading is no greater than +/- ____________.

1 Foot

What is the assigned frequency that a "K" -band RADAR device should operate on?

24.150 GHz

What is the assigned frequency range that a "Ka" -band RADAR device should operate in?

33.4 - 36 GHz

Which number would appear in the read-out window, providing you are using a K-Band RADAR instrument in the stationary mode, if you hold a tuning fork oscillating at 2520 Hertz in front of the antenna?

35

A tuning fork operating at 2881 c.p.s. will produce what reading on a "K" -band RADAR device?

40 mph

A NON Direction Sensing Radar returns the Doppler Shift _______________________.

As an absolute value

A too rapid acceleration or deceleration of the patrol vehicle may cause the moving Radar instrument to make a mistake in computing the patrol speed. This is known as?

Batching

By adjusting the range control of a RADAR instrument you have _________________.

Changed the radar's sensitivity

By introducing an angle between the radar and the target vehicle, the resulting speed displayed will be lower than actual. This effect is commonly called the _______________.

Cosine Effect

When the reading in the patrol window of the radar does not match the actual speed the patrol car is going, a RADAR operator should ________________.

Disregard any target vehicle speed readings

Select the incorrect statement: - During testing a RADAR operator can make calibration adjustments to the RADAR instrument - A RADAR should be tested a minimum of twice daily - The internal test results have no tolerance - Adjusting a beam range is the same as adjusting the RADAR'S sensitivity

During testing a RADAR operator can make calibration adjustments to the RADAR instrument.

A radar beam will travel forever unless it is reflected, refracted, or obstructed.

False

Placing foil in hubcaps will defuse the RADAR beam and create spurious readings.

False

Same direction Radar is not based on the Doppler Theory.

False

The number of pulses transmitted by a laser speed measuring device in a second is referred to as the pulse width.

False

The three factors effecting the radar decision process on which vehicle to display are: target density, position, and speed.

False

To be considered Competent in the eyes of the court, a Radar operator must be able to explain the "Doppler Principle".

False

The number of waves transmitted in a second is referred to as the wave's ____________________.

Frequency

Which of the following terms does not mean the same as the other three? - Hertz - Waves per second - Cycles per second - Gigas

Gigas

The person credited with designing the first laser was ________________.

Gordon Gould

The court case that indicated that a radar operator needed to be able to set up, test, and read the radar instrument was _______________.

Honeycutt V. Commonwealth

The term relative motion means?

Motion towards or away from a person, vehicle, or a radar unit

Most laser speed measurement devices operate at 904 ________________.

Nano-meters

The formula used by a same direction moving radar operated in the same direction target faster mode to calculate the speed of a target pulling away from the patrol vehicle is ________________.

PS+SS=TS

The additional element needed for a complete tracking history in moving RADAR but not required for stationary RADAR is ___________________.

Patrol Speed Verification

Visible light is a small portion of the electromagnetic spectrum. It begins as approximately 750 nm which is the color _____________ and ends at approximately 400 nm which is the color ______________.

Red / Violet

Rain may have what effect on stationary RADAR?

Reduces the range (sensitivity)

The rapid swinging of a radar antenna near a fixed object creates a phenomenon known as _____________.

Scanning

Under certain conditions the moving RADAR might be fooled into "thinking" that the patrol speed is lower then it actually is. This happens when the reflected signal that should be returning from the ground is actually returning from a moving vehicle in front of the radar. This is know as?

Shadowing

The first traffic radar case to receive Judicial Notice of the Doppler Principle was ___________________.

State V. Dantonio

The court ruling that an operator must have adequate training and experience in moving radar was ____________________.

State V. Hansen

The valid testing of a radar unit with a tuning fork was identified in __________________.

State V. Tomanelli

The correct formula for moving radar in opposite direction mode is ________________.

TS = CS - PS

The term "side-lobes" refers to ___________________.

That portion of the uncontrollable signal not in the main cone of the radar

The fact that an electromagnetic wave will change in frequency when reflected from a moving object is fundamental to ____________________.

The Doppler Shift

In opposite direction radar, a transmitted radar wave is reflected back from several objects. As the patrol vehicle and an approaching target vehicle close on each other, the difference between the transmitted signal from the patrol car and the reflected signal from the target vehicle is determined and processed as _______________________.

The High Doppler Signal

The legal term "Judicial Notice" means ________________.

The acceptance of scientific fact

When the aiming point of a laser speed measuring device is moved from the windshield to the grill of a car, the laser will disregard the sudden change in speed based on the pre-programmed limits. This process is referred to as ?

The average of least squares

The "Doppler Frequency" on a Doppler Shift is _______________________.

The difference between the transmitted and reflected frequency.

The person credited with building the first laser was _________________.

Theodore Maiman

A Moving - Same Direction Radar requires an additional tracking history element called the "Target Speed Discrimination Test".

True

It is a violation of federal law to knowingly point a laser at an aircraft in flight.

True

Speed limits are set by engineers who examine the traffic flow and recommend the limit posting based on the speed that seems most comfortable for most drivers. The mathematical name for this process is the 85th percentile.

True

The function of the audio tone on a police RADAR is to establish a correlated speed and determines if there is any potential interference.

True

The supportive evidence used by the operator in valid identification of a target vehicle is called the tracking history.

True

The term LASER is an acronym for Light Amplification by Stimulated Emission of Radiation.

True

A property of laser light is that it has _________________.

limited divergence narrow spectrum high intensity (all of the above)

In the case of Reck V. Ohio, it was determined that a laser speed device operator must have ____________________.

sufficient training / sufficient experience Both a and b are correct

The value of 72 Hertz equals ________________.

the "K"-band Doppler frequency for 1 mph

A radio wave travels at _________________.

the speed of light / 186,282 miles per second Both a and c are correct