Cobra XRS9730 Operations Instructions download pdf (Page 17)

Nothing Comes Close to a Cobra

Understanding Radar and Laser

Your Detector

English

Understanding Radar and Laser

•

Radar Speed Monitoring Systems

Four band frequencies have been approved by the Federal Communications

Commission (FCC) for use by speed monitoring radar equipment:

X band 10.525 GHz

K band 24.150 GHz

Ka band 33.400 – 36.00 GHz

Ku band 13.435 GHz

Your detector detects signals in all four radar bands.

VG-2 and Spectre 1

VG-2 and Spectre 1 are “detector detectors” that work by detecting low-level

signals emitted by most radar detectors. Your detector does not emit signals

that can be detected by VG-2 or Spectre 1, but does detect VG-2 and Spectre 1

signals and will alert you when a device is in use near your vehicle, if you

so choose.

Safety Alert Traffic Warning System

FCC-approved Safety Alert transmitters emit microwave radar signals that

indicate the presence of a safety-related concern. Depending on the frequency

of the signal emitted, it can indicate a speeding emergency vehicle or train,

or a stationary road hazard.

Because these microwave signals are within the K band frequency, most

conventional radar detectors will detect Safety Alert signals as standard

K band radar. Your detector, however, is designed to differentiate between

standard K band and Safety Alert signals, and give separate alerts for each.

Safety Alert technology is relatively new. Safety Alert transmitters can

be found in limited numbers in all 50 states, but the number is growing.

Depending on your location, you may not receive these alerts regularly

and may often encounter emergency vehicles, trains and road hazards

without being alerted. As the number of transmitters increases,

these alerts will become more common.

When you receive such an alert, please watch for emergency vehicles ahead

of you, on cross streets and behind you. If you see an emergency vehicle

approaching, please pull over to the right side of the road and allow it to pass.

Detection

Your Detector

Description Interpretation

Recommended

Response

Tone repeats slowly at first,

then speeds up rapidly.

Probably police radar. FULL ALERT

Tone sounds one

time only.

Probably a false alarm,

but possibly pulsed radar,

Spectre 1 or VG-2 nearby.

Exercise caution

Tone instantly begins

repeating rapidly.

Radar, Spectre 1 or VG-2 nearby

has been activated suddenly.

FULL ALERT

Pop mode tone. Pop mode gun very close. FULL ALERT

Tone repeats slowly as you

approach a hill or bridge, then

speeds up sharply as you

reach it.

Probably police

radar beyond the

hill or bridge.

FULL ALERT

Tone repeats slowly

for a short period.

Probably a false alarm. Exercise caution

Any type of laser alert. Laser alerts are

never false alarms.

FULL ALERT

Any Safety Alert

or Strobe Alert.

You are nearing an emergency

vehicle, railroad crossing, or

road hazard (construction,

accident, etc.).

Exercise caution

Instant-On Detection

Your detector is designed to detect Instant-On speed monitoring signals,

which can suddenly appear at full strength.

NOTE

You should take appropriate action

immediately whenever an instant-on alert is given.

Pop Detection

Your detector is designed to detect single pulse mode radars. These radars

are designed to have a low probability of detection. You should note that these

radar guns have a much shorter range while in this mode.

Responding to Alerts

9496 XRS 9730-D-B2 4/10/06 12:01 PM Page 28

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Cobra XRS9730 Operations Instructions Page 17

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