NC BASIC RADAR QUESTIONS AND ANSWERS
RADAR - Answers - Radio Detection and Ranging
Beginning in 2011 in NC there are RADAR's on the market that show.... - Answers -
Distance/Range
Radio waves from a radar travel? - Answers - Forever, unless refracted, reflected, or
absorbed
Frequency - Answers - Hertz, cycle, wave
What is constant? - Answers - Signal speed
Two variables - Answers - Frequency and wave length
How to measure a wave - Answers - Beginning of peak to the end of the valley
Frequency of X Band - Answers - 10,525,000,000 cycles per second
10.525 gHz
1.1 inches
Frequency of Ka Band - Answers - 33.4-36 gHz, 4/5 centimeters, .33 inches
K band frequency - Answers - 24.150 GHz, .49in
Signal speed - Answers - 186,000 miles per second
30 billion centimeters per second
Speed of light
Christian Johann Doppler studied what? - Answers - Sound waves
Factor that does not affect target selectivity - Answers - color of vehicle
11 degree beam angle will be 38 feet wide at 200 feet. It will be more than ____ feet
wide at 300 feet away - Answers - 57
When adjusting radar range, you are shortening the length of the beam? - Answers -
False
Low setting - Answers - Very close vehicles, strong signals
High setting - Answers - Very far vehicles, weak signals
, Can you mute the audio - Answers - No
Brandis vs. Brown - Answers - Everyone can testify to speed, common knowledge
Object brought closer to Radar - Answers - Higher frequency than transmitted signal
Relative Motion - Answers - Object stands still and RADAR moves
RADAR stands still and object moves
RADAR and object are moving in same direction at different speeds
When will RADAR show true speed? - Answers - When the vehicle is going directly
toward or away from RADAR
Never set the RADAR any further than ____ degrees from direction of travel - Answers -
20
In moving mode, RADAR determines your speed relative to the ________ and the
target vehicle relative to _____________ - Answers - Ground, patrol vehicle
Moving opposite direction front antenna, what formula will you use - Answers - TS=CS-
PS
Moving opposite rear antenna, formula - Answers - TS=SS-PS
If you are moving opposite direction, patrol speed is 65mph and the Target speed is 75
mph, what is your CS or SS? - Answers - 140
Best way to eliminate target selectivity issues is to rely on your ability to - Answers -
estimate vehicle speeds
Multi path beam cancelation - Answers - When you are clocking a car and suddenly the
clock goes away for a time then re-appears
Man made interference - Answers - Neon lights, CB radios, high power lines
Scanning - Answers - Stationary mode, RADAR moves forward or back during clock
Panning - Answers - Two piece RADAR, point the RADAR at the counting box
In moving RADAR you have _____ beams transmitted and ___ reflected back -
Answers - 1, 2
In moving RADAR, set the antenna as close to - Answers - 0 degrees from the patrol
car direction of travel
RADAR - Answers - Radio Detection and Ranging
Beginning in 2011 in NC there are RADAR's on the market that show.... - Answers -
Distance/Range
Radio waves from a radar travel? - Answers - Forever, unless refracted, reflected, or
absorbed
Frequency - Answers - Hertz, cycle, wave
What is constant? - Answers - Signal speed
Two variables - Answers - Frequency and wave length
How to measure a wave - Answers - Beginning of peak to the end of the valley
Frequency of X Band - Answers - 10,525,000,000 cycles per second
10.525 gHz
1.1 inches
Frequency of Ka Band - Answers - 33.4-36 gHz, 4/5 centimeters, .33 inches
K band frequency - Answers - 24.150 GHz, .49in
Signal speed - Answers - 186,000 miles per second
30 billion centimeters per second
Speed of light
Christian Johann Doppler studied what? - Answers - Sound waves
Factor that does not affect target selectivity - Answers - color of vehicle
11 degree beam angle will be 38 feet wide at 200 feet. It will be more than ____ feet
wide at 300 feet away - Answers - 57
When adjusting radar range, you are shortening the length of the beam? - Answers -
False
Low setting - Answers - Very close vehicles, strong signals
High setting - Answers - Very far vehicles, weak signals
, Can you mute the audio - Answers - No
Brandis vs. Brown - Answers - Everyone can testify to speed, common knowledge
Object brought closer to Radar - Answers - Higher frequency than transmitted signal
Relative Motion - Answers - Object stands still and RADAR moves
RADAR stands still and object moves
RADAR and object are moving in same direction at different speeds
When will RADAR show true speed? - Answers - When the vehicle is going directly
toward or away from RADAR
Never set the RADAR any further than ____ degrees from direction of travel - Answers -
20
In moving mode, RADAR determines your speed relative to the ________ and the
target vehicle relative to _____________ - Answers - Ground, patrol vehicle
Moving opposite direction front antenna, what formula will you use - Answers - TS=CS-
PS
Moving opposite rear antenna, formula - Answers - TS=SS-PS
If you are moving opposite direction, patrol speed is 65mph and the Target speed is 75
mph, what is your CS or SS? - Answers - 140
Best way to eliminate target selectivity issues is to rely on your ability to - Answers -
estimate vehicle speeds
Multi path beam cancelation - Answers - When you are clocking a car and suddenly the
clock goes away for a time then re-appears
Man made interference - Answers - Neon lights, CB radios, high power lines
Scanning - Answers - Stationary mode, RADAR moves forward or back during clock
Panning - Answers - Two piece RADAR, point the RADAR at the counting box
In moving RADAR you have _____ beams transmitted and ___ reflected back -
Answers - 1, 2
In moving RADAR, set the antenna as close to - Answers - 0 degrees from the patrol
car direction of travel
