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ABOUT DIGITAL WIRELESS TECHNOLOGY
This section offers some helpful information to
solve
most of the problems
you may encounter.
About 2.4GHz Digital Wireless Signal
This innovative digital wireless solution integrates advance Frequency Hopping Spread
spectrum (FHSS) technology. This technology greatly/completely reduces the interference
from other devices using the same radio frequency (2.4GHz), e.g. WiFi, Bluetooth, Zigbee,
cordless phone...etc. You now can enjoy high quality wireless images without flickering
or 'noise'. However, weaker signal (lag or still image) can be observed from time to time,
depending on the environment where the
system is installed. The system is compliant
with FCC part 15.247,ETSI(EN)300 328, audio / video signals transmitted 150m or further,
line of sight. However, line of sight installation is not usual, or required for good system
operation. Factors affecting transmission include microwave ovens, or other high
frequency electromagnetic waves. Reinforced concrete walls, large scale metal products
and objects should, ideally, not be located near to the camera or the monitor. Water also
creates a signal obstacle, as it absorbs the signal, so should be avoided. People etc.
passing through the tranmission area may also cause unstable signal quality. However,
in 'normal use' as a reversing, or interior camera, the system should offer excellent
performance and provide a clear and interference free image/view.
How to improve the wireless signal quality?
If possible, remove any obstacles between camera and monitor that might reflect/absorb
the signal. If the wireless signal strength is low try to position the camera in a location that
is above/below the vehicle chassis etc, rather than behind it. Additional 'Extension' aerials
are also available.
Why Image Compression?
In order to provide a secure and interference free signal, this digital wireless system
utilises a 2Mb frequency-hopping bandwidth. Different from traditional 2.4GHz analogue
wireless systems, the digital wireless signal is compressed and then transmitted as Motion
JPEG (MJPEG) format. By digitising and compressing the raw analogue data, the
bandwidth is used more efficiently and securely.
