Data Radio Modems

Radius designs and manufactures a range of digital data radio modems for OEM applications for use in remote control, telemetry, SCADA, alarm monitoring and mission critical systems. Using the latest features in digital data radio technology these products are used by utilities and industry alike. They are designed to provide wide area system coverage to ensure reliable, secure and cost effective transmission of critical data to remote sites. The range is made up of 2 product types. The PDR 221 which is a transparent digital data radio modem, and the PDR 121 which is a multi-repeating digital data radio. Both products come with advanced features which allow remote frequency change, remote power adjustment, BER test functions and non-intrusive real time remote diagnostics.

PDR 121 Data Radio Modem

The Radius PDR 121 is designed to allow a user to configure a wide area digital data radio network, without having to go to the cost of installing an expensive infrastructure. Each PDR 121 acts as an independent repeater and can forward messages to any other PDR 121. In fact a message can travel via 6 PDR 121’s before reaching its destination. In order to achieve this, the PDR 121 needs to look at the address information in the data packet it is transmitting. Therefore there is a list of most commonly used protocols in the configuration menu of the radio for the user to simply select, and if the protocol you want is not in the list, do not panic, the configuration menu allows you enter the characteristics of the protocol you are using.

PDR 221 Data Radio Modem

If wide area coverage is not as important to you as system data speed, the PDR 221, with its very low system latency is the ideal choice. Designed for transparent use with a low latency overhead the PDR 221 offers the user all the remote features of the PDR 121 but without the multi-repeat. But just in case you cannot reach all your sites directly, you can configure one of the PDR 221`s to act as a dedicated repeater and if that will not do the trick, then the back-to-back function allows you to connect two PDR 221’s together to give you extended coverage. And as in the PDR 121 you still get the benefit of the BER (Bit Error Rate) test function, the remote frequency and power change and the real-time non-intrusive diagnostics.

HSC 100 Hot Standby Basestation Controller

The HSC 100 is specifically designed to provide a high level of security against loss of telemetry data in a SCADA network. The HSC 100 monitors data traffic to and from the data radio master site and determines whether the current master data radio is experiencing communication problems. It will then switch over to another standby master data radio in order to maintain system reliability.

Why Choose a Wireless Solution?

Wireless communications remains the most cost effective solution for a significant amount of modern remote control/monitoring or telemetry applications. Advances in wireless technology allow data throughput and reliability to be very high and, given the costs of direct cabling or satellite infrastructure the price/performance benefits remain far above other means of communication. Modern wireless data radio devices are much more than simple modems. They are sophisticated units, designed to allow the user to create their own data radio communication system with a minimum amount of involvement either in set up or during the life time of the system.

Strength not Power

As wireless communications remains the most cost effective solution for a significant amount of modern remote control/monitoring or telemetry applications, there still remain a number of misunderstood concepts regarding a data radio network performance. The biggest of these is that more power means greater coverage.

PDM Base Station

The PDM has been designed with both the PDR 121 v2 and PDR 221 v2 in mind. It is based on the same HW and SW however it is oriented into a 19” rack for easy installation. This means it can be utilized as a slave, repeater or it’s main use as a master.