October 2012

Doc ID 023222 Rev 1

1/22

AN4117

Application note

Using the SPIRIT1 transceiver under EN 300 220 at 434 MHz

By Placido De Vita

Introduction

The SPIRIT1 is a very low power RF transceiver, intended for RF wireless applications in the

sub-1 GHz band. It is designed to operate in both licence-free ISM and SRD frequency

bands at 169, 315, 433, 868 and 915 MHz.

This application note outlines the expected performance when using the SPIRIT1 under EN

300 220-1 (v2.3.1, 2012-02) [2] in the 433.050 to 434.790 MHz band. There are no specific

requirements in this band, no specific use and no channel spacing are defined. Devices

supporting audio and video applications use a digital modulation method with a maximum

bandwidth of 300 kHz. Devices supporting digital voice have a maximum bandwidth not

exceeding 25 kHz. The maximum allowed output power is +10 dBm (10 mW).

For details of the regulatory limits in the 433.050 - 434.790 MHz SRD frequency bands,

please refer to the ETSI EN 300 220-1 v2.3.1 [2] and ERC recommendation 70-03 [3].

These can be downloaded from www.etsi.org and www.ero.dk respectively.

www.st.com