Operation Manual

UK • 16
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SPECs Safety Camera Systems
Due to the fact that the SPECs system incorporates a series of cameras that monitor a vehicles speed over a fixed distance, a different
alert pattern has been devised to ensure that your concentration is maintained throughout the danger zone.
When approaching the first camera in the SPECs system your 3Zero will begin to alert you at your chosen preset alert distance with
the display indicating ‘SPECs Str’ and emitting either a voice or your chosen audible alert. The display will then change to indicate the
speed limit at this point and then count down the remaining distance in 50 metre increments to the location of the camera.
Once you have passed the first camera the unit will then emit an audible alert and will alternate the display showing ‘SPECs’ and the
speed limit every five seconds to remind you that you are still within the SPECs system.
Whilst travelling within a SPECs series, your 3Zero will provide both an audible and visual alert 250m before each camera. If after
twenty seconds you do not pass another camera, the alert will automatically ‘Time Out’ and the alert will finish. If the unit ‘Times
Out’ and you then approach the next camera in the SPECs series however, the unit will alert you to that location at your preset alert
distance.
When you have passed the last camera in the series the display will indicate ‘SPECs End’.
Please Note: If you join a road in the middle of a SPECs series you will automatically get a visual and audible alert, 250m before
the first camera that you pass.
If you would like to change the alert to a visual alert only press the MUTE/CANCEL button to temporarily turn off the sound. If at any
time you would like to stop the alert, simply press and hold the MUTE/CANCEL button.
Laser Alerts
The 3Zero incorporates a built-in laser detector. As laser often requires instant action the device simply gives you an audible or voice
alert whilst the display will flash ‘Laser’.
As GPS is not used to locate laser, it is impossible to indicate the speed limit or count down accurately the distance to a location in
metres during a laser alert.
If you would like to change the alert to a visual alert only press the MUTE/MENU button to temporarily turn off the sound. If at any
time you would like to stop the alert, simply press and hold the MUTE/MENU button.
How Laser works
LASER stands for Light Amplification by Stimulated Emission of Radiation
The laser speed gun uses a method that relies on the reflection time of light. You have probably experienced the reflection time of
sound waves in the form of an echo. For example, if you shout down a well or across a canyon, the sound takes a noticeable amount
of time to reach the bottom of the well and travel back to your ear. Sound travels at approximately 1,000 feet (300 meters) per
second, so a deep well or a wide canyon creates a very apparent round-trip time for the sound.
A laser speed gun measures the round-trip time for light to reach a car and reflect back. Light from a laser speed gun moves a lot
faster than sound --about 984,000,000 feet per second (300,000,000 meters) or roughly 1 foot (30 cm) per nanosecond. A laser speed
gun shoots a very short burst of infrared laser light and then waits for it to reflect off the vehicle. The gun counts the number of
nanoseconds it takes for the round trip, and by dividing by 2 it can calculate the distance to the car. If the gun takes 1,000 samples
per second, it can compare the change in distance between samples and calculate the speed of the car. By taking several hundred
samples over the course of a third of a second or so, the accuracy can be very high.