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<p class=MsoNormal>I am currently setting up my old iBurst wireless Internet
connection for a friend.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am using an external 14dBi panel antenna and a desktop
modem (iBurst works on the 1.9GHz frequency).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>After playing with antenna placement on ground level, I
realised that I would need to have the antenna located higher to get a decent
signal. So I mounted the antenna to the existing TV antenna mast. This part
went fine, and the speeds went from an unstable 14kb/sec to a stable
80-100kb/sec. But the issue is that I now either need to mount the iBurst modem
on the mast near the antenna, or I will need to use some LMR400 to extend the
RF cable and leave the modem indoors. I currently have a short pigtail to FME,
and a 4 meter FME cable to n-male using some thin looking coax (no idea on what
it’s called).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I think the cable run from the antenna, to indoors will have
to be about 10 meters, maybe a little less.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>What do you think? My concern with mast mounting the iBurst
modem is that weatherproof boxes aren’t cheap, and not to mention the
issues of condensation, heat, ventilation etc. Although I already tried
extending the DC power with some decent quality cable, and that part
isn’t an issue at all.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>And my concern with extending the coax is obviously signal
lost (and this cable isn’t cheap either). At 10 meters, I have calculated
that a 10 meter run of LMR-400 at 1.9GHz would give me about 1.9dB of loss.
Although I imagine I’m already getting a fair bit of loss with my 4 meter
RF cable and pigtail setup.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I used this site: <a
href="http://www.timesmicrowave.com/cgi-bin/calculate.pl">http://www.timesmicrowave.com/cgi-bin/calculate.pl</a>
for calculating the loss.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any advice anyone can offer me would be great.<o:p></o:p></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'><img
border=0 width=143 height=79 id="Picture_x0020_1"
src="cid:image001.gif@01C8465A.3B241300" alt=vsseclogo></span></b><b><span
style='font-size:8.0pt;color:#262626'><o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Shaun Lee
Clarke<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Mobile:</span></b><span
style='font-size:8.0pt;color:#262626'> 0433 559 020<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#262626'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Victorian
Space Science Education Centre </span></b><span style='font-size:8.0pt;
color:#262626'>(At Strathmore Secondary College)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#262626'>IT/AV Technician<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Email: </span></b><span
style='font-size:8.0pt;color:#262626'><a href="shaun.clarke@vssec.vic.edu.au">shaun.clarke@vssec.vic.edu.au</a><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Web: </span></b><span
style='font-size:8.0pt;color:#262626'><a href="http://www.vssec.vic.edu.au/">http://www.vssec.vic.edu.au</a><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Phone:</span></b><span
style='font-size:8.0pt;color:#262626'> (03) 9379-3456<b><o:p></o:p></b></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Fax:</span></b><span
style='font-size:8.0pt;color:#262626'> (03) 9374-3855<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Address: </span></b><span
style='font-size:8.0pt;color:#262626'>at Strathmore Secondary College, 400 Pascoe
Vale Road, Strathmore, VIC, 3041, Australia<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#262626'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Strathmore
Secondary College</span></b><span style='font-size:8.0pt;color:#262626'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#262626'>IT Technician<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Email: </span></b><span
style='font-size:8.0pt;color:#262626'><a
href="clarke.shaun.l@edumail.vic.gov.au">clarke.shaun.l@edumail.vic.gov.au</a><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Web: </span></b><span
style='font-size:8.0pt;color:#262626'><a
href="http://www.strathmore.vic.edu.au/">http://www.strathmore.vic.edu.au</a><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Phone:</span></b><span
style='font-size:8.0pt;color:#262626'> (03) 9379-7999<b><o:p></o:p></b></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Fax:</span></b><span
style='font-size:8.0pt;color:#262626'> (03) 9379-2812<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:#262626'>Address: </span></b><span
style='font-size:8.0pt;color:#262626'>400 Pascoe Vale Road, Strathmore, VIC,
3041, Australia<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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