5.2 GHz Wireless digital Audio and Video Transmission System (OFDM Wimax)

CDS-5021h digital radiolink is designed for large professional urban monitoring CCTV systems where encryption of transmission and very high immunity to interference are required. This system provides an image transmission from even up to 21 cameras of one area, what in conjunction with analog systems (e.g. CAM5816h) allows to build the monitoring system with 29 wireless cameras!

Very high immunity to industrial interference and ability to operate within built-on area make the system is suitable for:

• dense urban area

• operation in vicinity of power lines

• operation in vicinity of large internet networks

• operation in non-line-of-sight environment

The system provides the transmission  of complete PAL image of resolution of 720 x 576 (D1) with the rate of 25 frames per second. The encryption using 128 bit identification code provides the protection against spying.

CDS-5021h  has one Composite video input with two audio channels. Due to deployment of separate transmitting and receiving antennas, the possibility of broad selection of receiving antennas has been achieved to expand the transmission ranges up to 2km.

The basis of stable system operation is an OFDM modulation (described below), known from WIMAX digital systems where high transmission rate with minimal image compression has been reached.

The indoor version of CDS-5021 can operate in closed environment having obstacles, eg. transmission between rooms, between stores of building, through walls and other obstacles, up to 50 m. The indoor CDS-5021 can be used as a sender which transmits an image and voice, eg. from TVsat tuner or DVD player, to TV sets located in other rooms. Moreover, CDS-5021 has a remote control transmission functionality. You can control  the TVsat tuner, located in other room, watching TV in your room.

To start up the CS-5021 system, it is only required to align the direction of antennas as well as to connect the video signal and the power supply. There is no need to find the available frequencies nor to set the operating channels. Within first few seconds after power on, the device finds the frequency available in the area automatically and stores this channel as its operating channel. This is requirement for devices working on 5.2 GHz band where reciprocal interference has been eliminated.

 The superb quality of transmission has been gained from implementation of:

• OFDM modulation known from digital WIMAX systems
• Dynamic selection of power and operating frequency (channel)
• Transmission protection with 128 bit encryption code
• QoS mechanisms, which provide the high quality of transmission
• MPEG2 compression, which allows high speed transmission of video streams and multimedia data. This compression is used in other systems, such as digital satellite television or DVB-T
• MIMO technology, which increases the throughput of wireless link thank to multiple antennas to transmit and receive radio signals. The use of MIMO technology gives the following advantages:
• increased reliability of link, due to higher immunity to failures or echoes of radio signal
• transmission quality gain from simultaneous receiving of cumulative signal

CDS-5021h set consists of:

• Digital transmitter in IP65 enclosure, with integrated directional 19dbi receiving antenna   x 1 pc
• Digital receiver in IP65 enclosure, with integrated directional 19dbi receiving antenna  x  1 pc.
• Operation Manual
• CE conformity declaration

CDS-5021h APPLICATIONS:

• Industrial CCTV cameras
• DVR recorders and multiplexers
• Long-distance radio-links for monitoring of forests
• Cable television and recording studios, for point-point video connections

FEATURES:

• stable, high quality PAL or NTSC image transmission (autodetection)
• up to 4 and up to 21 independent video channels
• transmission encrypted with 128 bit code
• 720 x 576 (D1) resolution
• display rate of 25 frames per second (at D1)
• OFDM modulation (WIMAX)
• composite video inputs 75 ohm
• high gain directional antennas providing stable operation
• up to 1km standard range – CDS-5021h (expanding to 2km possible)
• possibility of retransmission or extension of signal range
• transmission  completely free of interference, 802.11 internet networks, Bluetooth, radio-telephony, etc.
• extremely easy to install and completely unattended operation
• outdoor IP65 enclosure with integrated directional antennas

Note: The receiver operates with its own transmitter only. The device finds only its own transmitter using its identification code. This provides the effective protection against spying.

Systems operate in point-point configuration, i.e. one CDS-5021h set for each camera.

Examples of set selection:

For object with 1 camera: CDS-5021h x 1 set.

For object with 3 cameras: CDS-5021h  x 3 sets.

Legend:

OFDM is a transmission technique with multiple carriers created for a broadband multimedia A/V broadcasting. Such system is excellent for environment subjected to multipath signal transmission, such as urban areas or built-on areas. This technique uses simultaneous and parallel transmission of small pieces of data on different carriers, spaced between each other and creating one common broadband channel for high quality transmission of image.