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<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>Here
is a bit more info on the existing Easy Radio modules</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>1.
They come in TX or RX, or a TXRX</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>2. 10
mW</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>3.
They come with a program you can talk to the device and send low carrier, high
carrier for testing.</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>4.
They use 19k2 baud rate that comes from a USART / UART - makes them ideal to
have off a PIC chip.</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>5.
They take care of the pre-amble, manchester encoding and CRC
checking.</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>6.
They have RSSI (Rx sig strength pins)</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>7.
Then have a busy pin - good for collision detection.</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>8.
They run off 5 volts and draw very little power.</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>9.
They have a repeat function - but you would have to manage more than one digi
setup with ping pong suppression.</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>A.
Data rate on UART side - 2400 to 38400</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>B.
Configurable power output from 1mW up to 10 mW</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>C.
Configurable channel selection</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>D.
They cost around $30 for TX / RX and $60 for TXRX</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>I have
tested this and driven around the block - I got 1.9 km's out of
10mW</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2><A
href="http://vk4tec.no-ip.org/data/manuals/ER400TS-02.pdf">http://vk4tec.no-ip.org/data/manuals/ER400TS-02.pdf</A></FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff size=2>Cheers
Andrew VK4TEC</FONT></SPAN></DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=687190301-11082007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Andrew Rich
[mailto:vk4tec@people.net.au]<BR><B>Sent:</B> Saturday, 11 August 2007 10:30
AM<BR><B>To:</B> Aprssig<BR><B>Cc:</B> ozaprs<BR><B>Subject:</B> APRS
Databusrt<BR><BR></FONT></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>I would like to
make representation to the company that makes easy radio.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>They are currently
on 434 and 900 MHz licence free bands.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>They do 19k2 on
air at 10 mW.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>I would like to
ask them about producing a module that is up the band a bit into the 70 cm
region.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>I have looked at
after burners. For $80 I can get a kit that will give me around 15 watts
out.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>The databurst is
true FSK at 100 kHz.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>I am now curious
as to the licence implications.</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>Where would you
run a digital signal around 100 kHz wide on 70 cm ?</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>The data
transmission is around 25 ms. </FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>Here is the link
to their website</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2><A
href="http://www.lprs.co.uk/">http://www.lprs.co.uk/</A></FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial size=2>Comments
?</FONT></SPAN></DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=828072500-11082007><FONT face=Arial
size=2></FONT></SPAN> </DIV></BLOCKQUOTE></BODY></HTML>