Decatur Electronics GHD, Руководство пользователя

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GHD
TM
& SCOUT
TM
USER’S MANUAL
26
7.6 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.
7.7 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 GHD and the SCOUT are immune
from multi-path cancellation.
7.8 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 GHD and SCOUT radars contain 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.
7.9 Scanning
The GHD and SCOUT are designed to be used while attached to a
solid mount or hand-held in a steady position. Moving or “scanning”
the antenna past stationary objects can cause the system to detect
motion. Obtaining a speed reading from scanning will not happen
when you properly use the radar and is considered deliberate misuse
of the system.