The radio frequency spectrum is regulated by designated regulatory authorities that define how specific spectrum bands can be used. The ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) bands are free to use without license costs. As there is no single worldwide regulation, national authorities define which of the frequency bands are open for access in each specific Country.
The 2.4 - 2.5 GHz band can be used worldwide, but has specific disadvantages. Besides the poor transmission range due to the bad penetration of this frequency, the 2.4 GHz band is really noisy and crowded due to the vast number of Wi-Fi and Bluetooth devices around.
To overcome these issues, in Europe the frequency band 868 - 870 MHz is very common, as it provides data transmission ranges and speeds that are sufficient for many industrial applications.
Companies developing radio products for the European market often look out to non-European markets to expand their business volume. Most often the American as well as the Canadian markets are faced due to their huge potential. Unfortunately, in northern America the 868 MHz frequency band is not permitted by the Federal Communications Commission (FCC) USA and the Innovation, Science and Economic Development (ISED) Canada, such that the 902 - 928 MHz frequency band is taken as appropriate Counterpart.
This application note describes which key facts have to be considered, when replacing a proprietary Würth Elektronik eiSos 868 MHz radio module by it’s 915 MHz radio module Counterpart.
USEFUL LINKS
Application Notes www.we-online.com/appnotes
REDEXPERT Design Tool www.we-online.com/redexpert
Toolbox www.we-online.com/toolbox
Produkt Katalog www.we-online.com/products
DIRECTLINKS
CONTACT INFORMATION
Tel. +49 7942 945 - 0
Würth Elektronik eiSos GmbH & Co. KG Max-Eyth-Str. 1 × 74638 Waldenburg × Germany
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