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Industrial Wireless 101: Why do we need three frequency bands?
Posted by danstips in Bluetooth, Cellular, Communications, Cost Issues, Ethernet, Installation, ISA 100, ISA100, Process terminology, Wireless, Wireless, Wireless Transmitters, wireless transmitters, WirelessHART, WirelessHART on March 15, 2012
Regardless of what information you need to send, or where you need to send it, if your data is going “over the air”, you’ll need to choose a frequency in one of three ranges that do not compete with the FCC licensed bands for radio transmissions.
These three ISM (industrial, scientific, medical) bands are 900 MHz, 2.4 GHz, and 5 GHz. They’ve often been described as the industrial equivalent to Citizens’ Band radios, specified so they don’t interfere with broadcast radio signals.
History with technology would lead you to believe that the more Hertz you have, the better your radios will perform. But what you need to understand is that there’s a tradeoff. Each band has its strengths and weaknesses, and there’s a best use for each.
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