SCS Sentinel DWS Manuel D'installation Et D'utilisation page 53

PROBLEME
Wrong data and/or time is shown.
More cameras are added but not all
of them show images on the receiver
BOUT DIGITAL WIRELESS TECHNOLOGY
This section offers some helpful information to solve 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 fl icking
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 refl ect the
signal. These could include furniture, cabinets, and walls. If you feel the wireless signal is not
improvement, please 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 effi ciently and securely.
Consequentially, you might observe an indent image line on a larger display receiver or plasma
TV.
- Wrong date and/or time will result in unexpected record
schedule. Please refer to page 46 to confi gure correct system date/
time.
- Make sure all cameras are properly paired (see page 42).
- Make sure all cameras are properly activated (see page 42).
- Follow the solution of 'No image appears' to ensure best reception
of wireless signals.
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SOLUTIONS
EN