Decatur Electronics RAILMASTER-VP, Руководство пользователя

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RAILMASTER-VP™ USER’S MANUAL
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5.2.4 Large Objects
The
Railmaster-VP
detects a wide range of objects.
When an object is large, it is easy for the system
to “see” it as the target. However, when a large
target, such as a moving train, is not present,
the
Railmaster-VP
will “see” smaller objects. The
Railmaster-VP
low sensitivity level can detect
light, rain, insects, birds, and walking people.
(See section 3.1 Primary Menu, for how to adjust
sensitivity levels). When the system is “seeing” a
small object, the displayed speeds will be erratic.
Then when a large target moves in front of the
radar, the system will display the speed of it
instead of the smaller targets. If the system
displays speeds for no obvious target, direct the
radar at a large moving object or perform one of
the tests described in section 6 Field Tests to
verify that the device is working properly.
5.2.5 Multi-Path Beam Cancellation
If multi-path beam cancellation occurs, the target
vehicle speed sporadically blinks and reappears
at semi-random intervals. This type of
interference occurs when the radar loses track of
a target vehicle, because the target is reflecting
two or more signals, which are interfering with
each other. The
Railmaster-VP
is immune to
multi-path cancellation.
5.2.6 Radio Frequency Interference (RFI)
The system can inadvertently process radio
energy as Doppler speeds, including that from
airport radar, microwave transmission towers,
CB radio transmitters, and AM/FM transmission
towers. For this type of interference to occur, the
radar unit must be operating very close to the
radio transmitter.