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System OverviewVideoWave Digital is based on the 802.11 WLAN technology, especially adapted for transmitting video and telemetry in the 2.4GHz and 5.6GHz license free bands. The system is flexible, offering various configurations from simple point to point, to multiple camera applications, with telemetry for full PTZ control where required. The key feature of the RDT system , is the ease of use, with simple set-up procedures which require no laptop or specialist networking knowledge.In the RDT system, standard analogue CCTV cameras are connected to a Video Input Module (VIM), which converts the video to compressed MPEG-4 digital format. This signal is then routed to the transmitter for onward transmission. A number of cameras, each with its own VIM, can be connected to a single transmitter via a router. 
Typical Configuration for 4 Cameras with Single TX
Applications:Security, CCTV point-point and multi-camera, Surveillance, Site Monitoring, etc. For a security application, click here.Top of page 2.4GHz Transmitter / ReceiverThe RDT 2.4GHz VideoWave Digital transmission system is based on the 802.11g wireless standard, especially adapted for transmitting video and telemetry in the 2.4GHz license free band. The system has been designed specifically for the CCTV market, with ease of use and simplicity of installation being the key objective. For example, the units are supplied pre-programmed so a laptop is not needed on site and no detailed networking knowledge is required.Both units are supplied in IP67 weatherproof enclosures for direct external installation suitable for most applications. There is an external RF antenna connection (SMA) so that various antennas can be selected depending on the particular requirement. These can be mounted directly on the unit or remotely mounted using an antenna cable, to give additional height and flexibility.
5.6GHz Transmitter / ReceiverThe RDT 5.6GHz VideoWave Digital transmission system is based on the 802.11a WLAN technology, especially adapted for transmitting video and telemetry in the 5.5GHz to 5.7GHz (Band 'B') * license free band. The system is flexible, offering various configurations from simple point to point, to multiple camera applications, with telemetry for full PTZ control included as standard. The key feature of the RDT system, is the ease of use, with simple set-up procedures which require no specialist networking knowledge.* NOTE
Top of page Video Input / Video Output ModulesThe RDT VideoWave Digital System, is designed to be compatible with and interface to, standard analogue CCTV equipment. It can therefore be configured as a stand-alone wireless system or form part of a larger CCTV system with a mix of wired and wireless cameras. Video Input Modules (VIM) are supplied in IP67 weatherproof enclosures for outside installation, with integral mains power supplies. The Video Output Module (VOM) has a fan in the lid, to keep the processor cool, making it unsuitable for external mounting.The Video Input Module (VIM) accepts an input from a standard analogue CCTV camera, fixed or dome, and converts the signal to MPEG-4. This digital signal is then fed to the transmitter either directly or via a router in a multi-camera application. The VIM also has a RS485 interface for PTZ control, 2 digital I/O channels and two-way audio (specified option). The Video Output Module (VOM), is basically the reverse of the VIM, converting the MPEG-4 digital signal from the receiver, back to 1V p-p composite video. This output can then be fed directly to standard CCTV equipment, such as a monitor, DVR, matrix switch etc. The VOM has RS485 to connect to a video PTZ controller, 2 digital I/O channels and two-way audio (specified option).
Telemetry (PTZ Control)Both the VIM and VOM are provided with a RS485 connection to enable PTZ control. This provides a transparent link that will support most of the major telemetry protocols. The RS485 can be wired in a multi-drop configuration for systems with multiple PTZ cameras.Audio OptionIf the audio option is fitted, the system provides high quality two-way audio. The VIM has 3 different input options, with 3 corresponding outputs on the VOM and likewise, the VOM has 3 input options with 3 matching outputs on the VIM.Input options:
Alarms (Digital I/O)Both units are also provided with 2 digital inputs and 2 digital outputs. Input D1 and D2 on a VIM will switch outputs D1 and D2 on the corresponding VOM and visa-versa. The inputs are opto-isolated volt free contacts. The outputs are a pair of normally open relay contacts that can switch up to 5A at 30V dc or 250V ac.Wiring for the inputs is to terminal block JP5 and for the outputs to terminal block JP4. Top of page RouterIn the VideoWave Digital System, all the various units must be connected together via a router (except simple point-to-point connections). The router takes care of the networking protocol ensuring signals are directed to the correct destination.The RDT router is supplied in an IP67 weatherproof enclosure with integral mains power supply for easy installation. The unit has 5 connection ports allowing for example 4 Video Input Modules (VIM’s) to be connected to 1 Transmitter. Equally, it can be used to connect a Receiver to 4 Output Modules (VOM’s). For larger systems the routers can be cascaded to provide as many connections as required. Top of page AntennasA selection of antennas is available suitable for most applications depending on location and required coverage range. The distances achieved vary greatly with each installation, the surrounding terrain, buildings etc. so the figures quoted below are a general guide and assume a reasonably clear 'line of sight' between transmitting and receiving antenna.2.4GHz
5.6GHz
Top of page Contact RADIO DATA TECHNOLOGY LIMITED for: |
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