PDR 121 - Protocol Routing Mode
The PDR 121 incorporates many of the standard communications protocols, but because there are so many available there is also an option to configure the radio for other open or proprietary protocols.
The distance between any two devices is based on the data rate, the frequency utilised, the type of antennas employed and the reliability required. As an example we have working systems in the VHF spectrum communicating up to 50km and in the UHF spectrum up to 30km. Given that the PDR 121 unit can forward data messages to it’s neighbours it is conceivable to have an area coverage of several 1,000km2. Since the PDR has outstanding receiver sensitivity it is able to communicate over distances not achievable by other wireless devices.
Security & Reliability
Each radio has an option in the menu to invoke 128bit encryption over-the-air and all PDR radios also carry unique radio identities so that you can be confident that no-one can listen to or be interfered with by your wireless data radio system. The PDR also features Forward Error Correction with interleaving in order to increase immunity to interference, often recovering data packets with 30% or less corruption.
The PDR supports dual RS232 ports and an Ethernet port. This allows a variety of interfaces to the central system and the slave devices as well as the possibility to mix host systems. There is a
possibility to use the PDR 121 also as a bridge to an RS232 device from a central IP based host.
Diagnostics & Over Air Programming
Each PDR comes with a comprehensive menu system that allows the user to very easily perform measurements of their wireless network. This includes data on the signal strength and power output of each device in the network and a Bit Error Rate between any given units.
The tuning range of the radio is 40MHz, allowing users to easily migrate frequency within band and to employ duplex frequencies with a very wide separation. Power output can be set from a few milliwatts to 5W via the user interface. Signal strength can also be adjusted to suit noisy environments. Lastly the PDR is designed so that you do not need a costly central unit, since any device can be set up to act as master or slave.