Cobra Electronics XRS R9G - Manual (Page 37)

Nothing Comes Close to a Cobra ® 33
Radar and Laser
Strobe Alert
Special strobes mounted on the light bars of authorized emergency vehicles
(fire trucks, police cars, ambulances) automatically change traffic signals as
the vehicle approaches an intersection. These strobes and the special strobe
detectors located on the traffic signals are already in use in more than 1000
cities nationwide. Cobra’s exclusive Strobe Alert detector detects these
special strobes and sounds an emergency vehicle alert.
When you receive such an alert, watch for an approaching emergency vehicle
and pull over to allow it to pass. Contact your local fire and police
departments for information about coverage in your area.
LIDAR (Laser)
The correct name for the technology that most people refer to as “laser” is
actually LIDAR, Light Detection And Ranging. LIDAR operates much like
radar. Its signal spreads out like a radar signal, though not as widely. Unlike
radar, LIDAR must have a clear line of sight to its target vehicle throughout
the entire measurement interval. Obstructions such as sign posts, utility
poles or tree branches prevent valid speed measurement.
Some common questions about LIDAR include:
■ Does weather have any affect on LIDAR?
Yes. Rain, snow, smoke, fog or airborne dust particles reduce the
effective range of LIDAR and can, with dense conditions, prevent its
operation.
■ Can LIDAR operate through glass?
Yes. Newer LIDAR guns can obtain readings through most types of
glass. However, the laser pulse also can be received through glass to
trigger an alarm by your detector.
■ Can LIDAR operate while in motion?
No. Because LIDAR operates by line of sight, the person using it cannot
drive the vehicle, aim and operate the gun all at the same time.
■ Is LIDAR legal to use?
Yes. It is legal in all 50 states.
Your Detector
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