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FAQ's for Data Transmission
Q: What is the difference between a licensed system and an unlicensed system ?.A: A number of countries now offer alternatives for transmitting radio signals. An unlicensed system is usually low power which limits its maximum distance. This power may be between 10mW and 500mW or 2 Km to 20 Kms distance line of sight. This is very useful when gathering local data within a factory complex or across a road or water. A licensed system may be between 1 Watt and 25 Watts and even more in some countries. This output power will provide communication between 20 Kms and 40 Kms.
* A licensed system requires a radio licence from the government for every installation.
* Unlicensed systems require the product to be approved by the government but no licence is required.
Q: Can RDT provide Licensed and Unlicensed systems ?.
A: Yes we can - Most products shown on our home page are unlicensed systems. If you are not sure which is best for you, send us a brief email giving us a description of your application. If you have a specification and need assistance, we would be pleased to help. Just send us an email or fax with as much information as possible.
Q: I am a new user and my radio system is not working! What is wrong?
A: Please check the following, and if you continue to have a problem, contact our technical support.
Serial Port configuration - Devices (PLC's & GPS receivers etc.) that are connected to the radio modems may have differential default port configurations. The settings of the port on the device must match the settings of the port on the radio modem. Please ensure that the baud rate, parity, and other settings match those of the radio modem.
Power Supply Check the power supply connected to the RDT product. On-board led displays confirm the correct supply voltage is present.
