User's Manual

23
7. ABOUT DIGITAL WIRELESS TECHNOLOGY
This section offers some helpful information to overcome most of the problems you
may encounter. We hope this section can help you to enjoy a pleasant setup.
About 2.4GHz Digital Wireless Signal
This innovative digital wireless solution integrates advance Frequency Hopping
Spread spectrum (FHSS) technology. This technology greatly reduce the interference
that comes from other devices using the same radio frequency (2.4GHz), e.g. WIFI,
Bluetooth, Zigbee, cordless phone...etc. You now can enjoy a more pleasant wireless
surveillance quality without flicking and noisy image. However, weaker signal (lag or
still image) can be observed yet from time to time, depending on the environment
where the system is installed. Complied with FCC part 15.247,ETSI(EN)300 328,
audio / video signals transmitted out about or over 500 foot / 150meter in line of sight
should be supported. Line of sign installation, though, is usually not a common
practice. Factors affecting transmission include microwave ovens or other high
frequency electromagnetic waves. Reinforced concrete walls, large scale metal
products and metal furniture should not be located near the camera or the receiver.
Water creates an obstacle and should not be placed near. Human bodies such as a
person passing through may cause unstable signal quality
How to improve the wireless signal quality?
If possible, remove obstacles in between camera and receiver that might reflect the
signal. These could include furniture, cabinets, and walls. If you feel the wireless
signal is not improvement. Or simply relocate the camera closer to the receiver.
Why Image Compression?
In order to provide a private and interference free wireless service, this digital
wireless solution works on a 2Mb narrow hopping band. Different from traditional
2.4GHz analog signal, this digital wireless signal is compressed and presented as
Motion JPEG (MJPEG) format. By digitalizing and compressing the raw analog data,
the bandwidth is used more efficiently and securely. Consequentially, you might
observe an indent image line on a larger display receiver or plasma TV.