GENESIS-VPD™ USER’S MANUAL
27
Rev. 09/04
5.2.3 Electromagnetic Interference (EMI)
Operating electric motors can produce EMI. EMI
from power seats or windshield wipers can also
produce spurious target speeds. To correct the
interference, simply turn off its source.
5.2.4 Feedback Interference
When the radar beam is directed at computer
screens, streetlights, and other electronic devices,
it can display spurious speeds. To correct the
interference, relocate the radar gun antenna.
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
Genesis-VPD
is immune from multi-path
cancellation.
5.2.6 Radio Frequency Interference (RFI)
The system can inadvertently process radio
energy as Doppler speeds, including that from
police radios, airport radar, microwave transmission
towers, CB radio transmitters, and AM/FM
transmission towers. For this type of interference to
occur, the radar gun must be operating very close to
the radio transmitter.
The
Genesis-VPD
contains an RFI detection circuit
that detects excess radio frequency energy.
When
stray radio frequency energy reaches an excessive
level, the system displays an RFI message and
stops processing and displaying speeds.
The
system resumes normal operation when the RFI
condition no longer exists. At that time, any locked
speeds will display again.