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418/433 MHz short-range communication:

licence-exempt data transmission and remote control systems

418/433 MHz short-range communication:
In the UK, two small sections of the 70-cm band, around 418 MHz and 433 MHz, have been available for some time for licenceexempt wireless communication using type-approved lowpower devices (LPDs), also called short-range devices (SRDs). In this article we look at the use of these frequency bands, and some general design considerations for SRD modules.
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