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<H1> <A
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<DIV>ICOM Digital F4029SDR
Motorola Analógico FM TLKR-T7</DIV>
<H1>The Gadget Show tests digital and analog walkie talkies</H1>
<P><STRONG>The Gadget Show</STRONG>, broadcast on the UK TV station Channel 5,
recently compared two PMR446 walkie talkies, the ICOM Digital F4029SDR and the
Motorola FM TLKR-T7.</P>
<P>The Gadget Show Wild Challenge took to the Lake District to pit old
technology FM analog voice, in the form of the Motorola, against the new ICOM
using the Digital PMR446 standard. As might be expected the Digital ICOM proved
superior to the FM Motorola.</P>
<P>This particular digital technology uses 4FSK/FDMA modulation and supports
both voice and data. It operates with 6.25 kHz channel spacing instead of the
12.5 kHz channels required for FM enabling twice as many channels to be carried
in the same spectrum.</P>
<P>You can watch the programme on the web at<BR><A
href="http://fwd.five.tv/videos/wild-challenge-part-1"
target=_blank>http://fwd.five.tv/videos/wild-challenge-part-1</A></P>
<P>Icom IC-F4029SDR Transceiver for Digital PMR 446<BR><A
href="http://www.southgatearc.org/news/march2008/digital_pmr_446.htm"
target=_blank>http://www.southgatearc.org/news/march2008/digital_pmr_446.htm</A></P>
<P>PMR Digital Voice - NXDN™<BR><A
href="http://www.southgatearc.org/news/october2008/pmr_digital_voice.htm"
target=_blank>http://www.southgatearc.org/news/october2008/pmr_digital_voice.htm</A></P>
<P>OFCOM Digital PMR446 Interface Requirement IR2009<BR><A
href="http://www.ofcom.org.uk/radiocomms/ifi/tech/interface_req/IR2009.pdf"
target=_blank>http://www.ofcom.org.uk/radiocomms/ifi/tech/interface_req/IR2009.pdf</A></P>
<P>ETSI PMR<BR><A
href="http://www.etsi.org/WebSite/Technologies/PrivateMobileRadio.aspx"
target=_blank>http://www.etsi.org/WebSite/Technologies/PrivateMobileRadio.aspx</A></P>
<P>CMX7141 Digital PMR Processor<BR><A
href="http://www.spectre-online.co.uk/products/wireless/pmr/chip/cmx7141_digital_pmr_processor"
target=_blank>http://www.spectre-online.co.uk/products/wireless/pmr/chip/cmx7141_digital_pmr_processor</A></P>
<P>Fonte: <FONT face=Verdana>The Southgate News
website</FONT></P></FONT></BODY></HTML>