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[* black] The larger of the two boards contains the connections for both antennas and is responsible for the RF side of the tracking device. Its notable chips include:
[* red] XEMICS XE1201[http://xemics.com/docs/xe1200/xe1201evk_userguide.pdf|XEMICS XE1201] Ultra low power single chip transceiver
[* red] XEMICS XE1201[http://xemics.com/docs/xe1200/xe1201evk_userguide.pdf|XEMICS XE1201] Ultra low power single chip transceiver
[* black] The XE1201 allows for data transmission and data reception in half duplex mode.
[* orange] RFM [link|http://www.rfm.com/products/spec_sheet.php?record=RF1172|RF1172] SAW (surface-acoustic-wave) filter
[* black] The RF1172 provides front-end selectivity (the capability to separate signals in one frequency from all other frequencies) in 433.92 MHz receivers.
[* black] Typical applications of this filter include wireless remote-control and security devices operating in Europe under ETSI I-ETS 300 220.