Cobra XRS 9690 Operating Instructions Manual page 35

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. introduced fairly
recently by 3M and Tomar. are already in use in more than 1000 cities
nationwide. Cobra's exclusive Strobe Alert detector will detect these
special strobes and give an emergency vehicle alert.
When you receive such an alert please watch for an approaching
emergency vehicle and pull over to allow it to pass. To inquire about
coverage in your area. contact your local fire and police departments.
LIDAR (Laser)
The correct name for the technology that most people refer to as
laser is actually L1DAR. which stands for Light Detection and Ranging.
L1DAR operates much like radar. Its signal spreads out like a radar
signal. though not as widely. Unlike radar. L1DAR must have a clear
line of sight to its target vehicle throughout the entire measurement
interval. Obstructions such as sign posts. utility poles. tree branches.
etc., will prevent valid speed measurement.
Some common questions about lIDAR include:
• Does weather have any affect on LlDAR?
Yes. Rain. snow. smoke. fog or airborne dust particles will reduce tile
effective range of LlDAR and can. if dense enough. prevent its operation.
• Can LlDAR operate through glass?
Yes. Newer LlDAR guns can obtain readings tllrough most types of glass.
However, the laser pulse also can be received througll glass to trigger
an alarm by your detector.
• Can lIDAR operate while in motion?
No. Because LlDAR operates by line of sight. the person using it cannot
drive the vehicle. aim and operate the gun all at the same time,
• Is LlDAR legal to use?
Yes. It is legal in all 50 states.
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