Radar/Lidar

ABC's of setting up a radar device refers to:

A: antenna B: box (counting unit) C: current (power source)

The following characteristics of the target will have an effect on the range of the Lidar unit?

ALL OF THE ABOVE

When operating a moving radar the operator should remember:

ALL THE ABOVE

Which of the following will NOT affect the range of radar?

ALL WILL AFFECT RANGE

An approaching vehicle reflects the signal from the radar and it...

Compresses the waves

The following effects may cause erroneous speed indication

Electrical, Mechanical, operational

T/F: A lidar unit uses the Doppler Principles to measure a vehicle's speed.

FALSE

T/F: An automobile with a fiberglass body cannot be detected by a lidar unit.

FALSE

T/F: In addition to the laser beam transmitted by the lidar unit, the unit also "sees" and can detect sunlight and neon lights, but the "speeds" they display are less than 5 mph.

FALSE

T/F: In the case of Lidar, the angular effect could cause the target speed measurement to be higher than the actual speed

FALSE

T/F: It is advisable to sight the lidar unit in on the sun if there are no poles or other suitable objects available.

FALSE

T/F: Lidar units use a lower frequency beam than radar

FALSE

T/F: Operation of a lidar unit through a windshield will affect the accuracy of the device

FALSE

T/F: Radar uses speed as the major determining factor for target selection.

FALSE

T/F: Radar will always display the vehicle closest to the radar

FALSE

T/F: The feedback or scanning affect is possible with all radar sets regardless of design

FALSE

T/F: The word LIDAR stands for Light Doppler and Ranging

FALSE

T/F: Vehicle speed is equal to the elapsed time divided by the distance traveled

FALSE

T/F: You should only test your radar device one a week

FALSE

Traffic radar speed measurement devices determine vehicle speeds by measuring the changes in the signal's:

FREQUENCY

Tracking history has 3 major steps that a radar operator should follow. Which of the following do not belong?

Frequency Range

Optical resonators which create the laser beam use the following two materials

Gallium and arsenide

Tracking History for Lidar: VISUAL OBSERVATIONS

Identify Target, Estimate Speed, Estimate Range, Check Environment (DILF)

Which of the statements is true regarding the frequency of laser beams used for speed measurement?

Laser beams have a higher frequency than radar beams

A LIDAR unit's accuracy is affected by:

NONE OF THE ABOVE

If several vehicles are in range the radar will ALWAYS pick up the speed of the vehicle that is:

NONE OF THE ABOVE

Mechanical interfeance which will provide faulty readings include

NONE OF THE ABOVE

Audio Confirmation (Lidar)

Pitch target acquisition tone

Audio Confirmation

Pitch of Audio Clarity of Audio

In order for the radar operator test to be complete the external Tuning fork test... must be within

Plus or minus one mile per hour

Traffic radar uses

Radio waves

Once transmitted the length of a radar is infinite unless it is

Reflected, absorbed or retracted.

Which of the following is the correct order of priority of the criterion in a radar's decision making?

Reflective capability, position, and speed

Lidar units are examples of this type of laser

Semiconductor laser

Target Speed Confirmation

Steady Readout Consistent with visual estimate Verify patrol speed

Target Speed Confirmation (Lidar)

Steady or multiple Readouts Readout Consistent with visual estimate

T/F: Batching affect occurs if the patrol vehicle has a sudden change in velocity while using moving radar

TRUE

T/F: Lidar units use laser light from the infrared spectrum

TRUE

T/F: The color of a vehicle has an effect on the distance a lidar unit can detect and measure the vehicle speed

TRUE

T/F: The greater potential for error results when the driver is in moving mode

TRUE

T/F: The speed of a lidar signal is always equal to the speed of light.

TRUE

T/F: Tuning forks may be exchanged between different radars in the same band.

TRUE

T/F: a lidar signal's beam length is infinite unless reflected, refracted or absorbed by some object in its path

TRUE

The basic computation of using opposite direction moving radar is

Target speed= closing speed - patrol speed

Consine affect is

a factor that will cause speed readings that are in the motorist's favor

The speed of a laser beam is

equal to the speed of light

The term FREQUENCY is defined as

number of waves transmitted per second

Weather deficiency such as rain or snow tend to _____ radar

reduce

A LIDAR signal's frequency is:

the number of waves set out in one second

TRACKING HISTORY: VISUAL OBSERVATION

(DILF): Identify Target, Estimate Speed, Estimate Range, Check Enviornment

How many cycles per second will k-band radar?

72

T/F: Consine effect can result in a higher than actual rate of speed for a target in moving mode

FALSE

Acronym "radar" stands for what?

Radio Detecting and Ranging

T/F: A radar signal moves at the speed of light

TRUE

T/F: Atmospheric conditions can prevent a lidar unit from measuring a vehicle's speed

TRUE

Angular effect does not become a factor in affecting a speed reading until the angle exceeds approximately ______ degrees

10

What is the operating frequency of k-band radar?

24.15 GHZ

When externally testing a radar device in the moving mode what will the target window read out indicate when you have simultaneously activated a 35 MPH in a 65 MPH tuning fork?

30 MPH

The concept of tracking history evolved from which of the following?

Case Law

T/F: All lidar units are classified as Class 2 laser devices

FALSE

T/F: Moving radar uses two separate transmitters.

FALSE

A Lidar unit will display the target speed of:

The target of the operator's choice