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<P><FONT size=2><FONT face=Verdana size=3>Caros Colegas,<BR><BR>O exemplo aqui
apresentado, facultado pela ICOM Canadá para 1.200 MHz, aplica-se de igual
forma em 2m e 70cm.<BR><BR>No entanto, e especificamente para 1200 MHz, existem
disponíveis repetidores; para voz e dados de baixo debito e repetidor de dados
de alto debito.<BR><BR>Este ultimo tipo de repetidor, permite todo o tipo de
actividades que envolvam altos débitos de dados; desde a difusão de imagens em
directo, troca de ficheiros complexos, etc., etc., até acesso integrar á
Internet via rádio.</FONT><BR><BR>
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<TD width=524><FONT
face="Arial, Helvetica, sans-serif"><B><FONT
color=#009900>D-STAR repeater system</FONT></B></FONT><FONT
face="Verdana, Arial, Helvetica, sans-serif"><B></B></FONT></TD>
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<DIV><FONT face="Verdana, Arial, Helvetica, sans-serif"
size=2>The D-STAR repeater is composed of a repeater
controller, digital voice</FONT></DIV>
<DIV><FONT face="Verdana, Arial, Helvetica, sans-serif"
size=2>repeater, digital data repeater(only to 1200 MHz),
10GHz microwave relay and the Internet gateway PC. For the
signal is digital data, no information is lost due to
conversion and multiple repeater relays are possible in this
system. The D-STAR system repeater can perform 3 relay
functions as shown in the following figures. </FONT></DIV></TD>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2><B><FONT
size=5>Single repeater</FONT> </B></FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2><IMG height=202
src="http://www.icomcanada.com/products/amateur/ID-1/01.jpg"
width=534></FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2>The D-STAR repeater
operates similar to existing analog repeater. That is a simple relay of
transmit and receive communication in 1.2GHz band. </FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2><B><FONT
size=5>Microwave link</FONT> </B></FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2><IMG height=230
src="http://www.icomcanada.com/products/amateur/ID-1/02.jpg"
width=530></FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2>When D-STAR repeaters
are connected via 10GHz microwave, the D-STAR system transfers a received
data to another repeater site. You can also make a CQ call to a specified
repeater area. </FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2> </FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2><B><FONT
size=5>Internet gateway relay</FONT> </B></FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2><IMG height=217
src="http://www.icomcanada.com/products/amateur/ID-1/03.jpg"
width=533></FONT></TD></TR>
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<TD><FONT face="Arial, Helvetica, sans-serif" size=2>When D-STAR repeaters
are connected with the Internet gateway, the D-STAR system relays the
received data over the Internet. Microwave links and Internet gateways can
be combined even during one contact. So your message will get through
virtually to anywhere in the D-STAR system.
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<DIV><FONT face=Arial>Fonte: ICOM Canadá.</FONT></DIV></BODY></HTML>