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<DIV><FONT face=Arial size=2>And don't forget all the cordless
phones.</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=atwoodm@paragon-inc.com href="mailto:atwoodm@paragon-inc.com">Mark
Atwood</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, March 02, 2008 1:53
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Speaking
of 2.4GHz</DIV>
<DIV><BR></DIV><FONT size=4><FONT
face="Calibri, Verdana, Helvetica, Arial"><SPAN style="FONT-SIZE: 11pt">Pretty
much all of your standard wireless routers use 2.4ghz. 802.11b and
802.11g (virtually all of the wireless traffic) is 2.4ghz as are bluetooth
devices. Bluetooth uses FHSS though where 802.11b/g use direct
sequencing (DSSS) I believe...could be wrong on that last part, but I know
they all use 2.4ghz.<BR><BR>-M<BR><BR><BR>On 3/2/08 1:23 PM, "Del Rykert"
<<A
href="mailto:drykert2@rochester.rr.com">drykert2@rochester.rr.com</A>>
wrote:<BR><BR></SPAN></FONT></FONT>
<BLOCKQUOTE><FONT size=4><SPAN style="FONT-SIZE: 11pt"><FONT
color=#0000ff><FONT face=Arial>I thought many wireless devices were using
the 2.4 GHz in homes and computer stuff. ?
<BR> <BR> Del<BR></FONT></FONT></SPAN></FONT>
<BLOCKQUOTE><FONT size=4><SPAN style="FONT-SIZE: 11pt"><FONT
face="Calibri, Verdana, Helvetica, Arial"><BR>----- Original Message -----
<BR> <BR><B>From:</B> Randall Bearden <A
href="mailto:rbearden56@bellsouth.net"><mailto:rbearden56@bellsouth.net></A>
<BR> <BR><B>To:</B> NSRCA Mailing List <A
href="mailto:nsrca-discussion@lists.nsrca.org"><mailto:nsrca-discussion@lists.nsrca.org></A>
<BR> <BR><B>Sent:</B> Sunday, March 02, 2008 9:13
AM<BR> <BR><B>Subject:</B> Re: [NSRCA-discussion] Speaking of
2.4GHz<BR> <BR><BR></FONT></SPAN></FONT><FONT
face="Verdana, Helvetica, Arial"><SPAN style="FONT-SIZE: 9pt">On 3/1/08
1:49 AM, "John Pavlick" <jpavlick@idseng.com>
wrote:<BR><BR></SPAN><FONT size=4><SPAN
style="FONT-SIZE: 11pt"><BR></SPAN></FONT></FONT>
<BLOCKQUOTE><FONT face=Arial><SPAN style="FONT-SIZE: 9pt">Yeah, how many
people experienced the bug in the early Spektrum stuff? We didn't
hear too much about that one. The best part is they addressed it
and used their resources to solve the problem quickly. Futaba is
going through their teething pains now. NOTHING is perfect. It is
in your best interest to use ANY new technology with extra caution
until it develops a proven track record. I would be a little
"extra" apprehensive about the XPS stuff only because it's not
backed by large company like Futaba, JR or Airtronics. Small
companies tend to have a harder time solving problems similar to the
ones that we've seen with the Spektrum and Futaba
systems.<BR></SPAN></FONT><SPAN style="FONT-SIZE: 9pt"><FONT
face="Verdana, Helvetica, Arial"><BR></FONT><FONT face=Arial>John
Pavlick<BR><A
href="http://www.idseng.com">http://www.idseng.com</A><BR></FONT><FONT
face="Verdana, Helvetica, Arial"><BR><B>From:</B> Ed Alt <A
href="mailto:ed_alt@hotmail.com"><mailto:ed_alt@hotmail.com></A>
<BR></FONT><FONT face=Arial><BR></FONT></SPAN>
<BLOCKQUOTE><SPAN style="FONT-SIZE: 9pt"><FONT
face="Verdana, Helvetica, Arial"><BR><B>To:</B> NSRCA Mailing List <A
href="mailto:nsrca-discussion@lists.nsrca.org"><mailto:nsrca-discussion@lists.nsrca.org></A>
<BR> <BR><B>Sent:</B> Saturday, March 01, 2008 12:15
AM<BR> <BR><B>Subject:</B> Re: [NSRCA-discussion]
Speaking of 2.4GHz<BR> <BR><BR>Spektrum is going to
come out with Telemetry for airborne radios. They've
had it for years in their ground radios, so they have a
handle on it. I also like the fact that their lead
engineer who started the entire Spektrum line with Horizon
came from Cypress Semiconductor, the chip vendor for the
Spektrum stuff. Futaba has a great base of experience
with Spread Spectrum. Their teething pains seem to have
more to do with re-packaging their existing technology in
a scramble to play catch-up with Spektrum.
<BR> <BR>Every radio has problems here and
there, as we've seen over the years with 72 mHz gear, so when I
hear that something just totally died in a few isolated
cases, it does not alarm me. However, "the big 3"
have proven that they deliver good products overall and
will address problems that do exist. XPS on the other hand
has made some questionable claims and really has no
solution to provide path diversity for the receiver.
If you look at Futaba and also Airtronics full range
SS receivers, they get path diversity from placing each antenna
at the end of thin coax leads that allow them to each have
a unique RF environment, much like Spektrum accomplishes
with actual receivers at the end of data leads that feed a
central unit. <BR> <BR>If it was me trying to use
XPS, I would spend a couple of years test flying it in stuff I
could afford to lose, same as I did with Spektrum when it
first came out. I wounded a foamy with a AR6100
receiver that had an early firmware bug, which Horizon
acknowledged and fixed. It had nothing to do with radio
reception; it was the one that would slap down elevator
and stay there. Nice! Since then, all of my
foamy kills have been directly traceable to my
thumbs.<BR> <BR>Ed<BR> <BR> <BR>
<HR align=center width="100%" SIZE=3>
<BR>Date: Fri, 29 Feb 2008 14:17:06 -0800<BR>From:
edvwhite@sbcglobal.net<BR>To:
nsrca-discussion@lists.nsrca.org<BR>Subject: Re:
[NSRCA-discussion] Speaking of
2.4GHz<BR><BR>Ed,<BR><BR>I've been digging into (ie,
poking around RCU) for XPS issues and as is usually the case
find mostly secondhand and anecdotal problems along with a
few really unhappy people. I also find a lot of
happy XPS users. I am attracted to the XPS because
it offers the future possibility of telemetry, something I
would like to play with. Lastly on the Spektrum,
I've seen only a handful of systems fly at our local
field. I've also seen two crashes on two different
Spektrum systems due to total loss of control, at close
range. At least one of those verified good battery
voltage under load after the crash (the other one didn't
check). <BR><BR>I know there are a huge number of
satisfied Spektrum users. I know of two locally who are
not quite so satisfied. Neither ever did figure out
the reason for the loss of control. And with
Futaba's recent problem (which they have fixed), well I
think we all have to realize there is no bulletproof
system. Just looking to see if people have had
problems with the XPS.<BR><BR>Ed<BR><BR><B><I>Ed Alt
<ed_alt@hotmail.com></I></B> wrote:
<BR> <BR></FONT><FONT face=Arial><BR></FONT></SPAN>
<BLOCKQUOTE><SPAN style="FONT-SIZE: 9pt"><FONT
face="Verdana, Helvetica, Arial"><BR></FONT><FONT
face=Arial><BR></FONT></SPAN>
<BLOCKQUOTE><SPAN style="FONT-SIZE: 9pt"><FONT
face="Verdana, Helvetica, Arial">With a proven solution from
Spektrum / JR and with Futaba introducing what will
undoubtedly be a solid solution, why play with XPS? I
can't think of any advantage that it offers and it
apparently has some issues to dig into and understand.
<BR> <BR>Ed<BR><BR><BR> <BR></FONT><FONT
face=Arial><BR></FONT></SPAN>
<BLOCKQUOTE><SPAN style="FONT-SIZE: 9pt"><FONT
face="Verdana, Helvetica, Arial"><BR> <BR>
<HR align=center width="100%" SIZE=3>
Date: Fri, 29 Feb 2008 08:44:14 -0800<BR>From:
edvwhite@sbcglobal.net<BR>To:
nsrca-discussion@lists.nsrca.org<BR>Subject:
[NSRCA-discussion] Speaking of 2.4GHz<BR><BR>Anybody
have experience with the xtremelink
systems?<BR><BR><A
href="http://www.xtremepowersystems.net/">http://www.xtremepowersystems.net/</A><BR><BR>Ed<BR><BR><B><I>Ken
Thompson <kthompson@stx.rr.com></I></B> wrote:
<BR></FONT><FONT
face=Arial><BR></FONT></SPAN></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE><SPAN
style="FONT-SIZE: 9pt"><FONT face="Verdana, Helvetica, Arial"><BR></FONT><FONT
face=Arial>That's pretty cool, thanks for bringing this to the
list. I saw this in the Flying Giants first thing this
morning.<BR></FONT><FONT face="Verdana, Helvetica, Arial"><BR></FONT><FONT
face=Arial><BR></FONT><FONT face="Verdana, Helvetica, Arial"><BR>-----
Original Message ----- <BR> <BR><B>From:</B> Kevin Brice <A
href="mailto:kevinbrice@earthlink.net"><mailto:kevinbrice@earthlink.net></A>
<BR> <BR><B>To:</B> nsrca-discussion@lists.nsrca.org
<BR> <BR><B>Sent:</B> Thursday, February 28, 2008
11:25 AM<BR> <BR><B>Subject:</B> [NSRCA-discussion] The Great
2.4GHz DSM
Giveaway<BR> <BR><BR> <BR> <BR></FONT></SPAN><FONT
face="Verdana, Helvetica, Arial"><FONT color=#000080><FONT size=4><SPAN
style="FONT-SIZE: 10pt">For those on the 2.4 fence, this may
encourage you to upgrade to DSM.<BR></SPAN></FONT></FONT><SPAN
style="FONT-SIZE: 9pt"><BR> <BR> <BR></SPAN><FONT
color=#000080><FONT size=4><SPAN style="FONT-SIZE: 10pt">I am not
sure if the html graphics will show so here is the link to
Spektrum’s Receiver Giveaway. <BR></SPAN></FONT></FONT><SPAN
style="FONT-SIZE: 9pt"><BR></SPAN><FONT color=#000080><FONT size=4><SPAN
style="FONT-SIZE: 10pt"><A
href="http://www.spektrumrc.com/giveaway/">http://www.spektrumrc.com/giveaway/</A>
<BR></SPAN></FONT><SPAN
style="FONT-SIZE: 9pt"><BR> <BR> <BR> <BR>Kevin
Brice<BR><BR>kevinbrice@earthlink.net
<BR><BR> <BR> <BR> </SPAN></FONT><SPAN
style="FONT-SIZE: 9pt"> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"><BR> <BR>
<HR align=center width="100%" SIZE=2>
</SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"><BR></SPAN><FONT size=4><SPAN
style="FONT-SIZE: 10pt"><B>From:</B> Spektrum Signal [<A
href="mailto:webmaster@spektrumrc.com]">mailto:webmaster@spektrumrc.com]</A>
<BR><B>Sent:</B> Thursday, February 28, 2008 10:00
AM<BR><B>To:</B> kevin@wenzlerarchitects.com<BR><B>Subject:</B>
The Great 2.4GHz DSM Giveaway<BR></SPAN></FONT><SPAN
style="FONT-SIZE: 9pt"><BR> <BR> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt">Having trouble viewing this email? Click
here. <A
href="http://publications.horizonhobby.com/read/archive?id=1223&amp;e=kevin@wenzlerarchitects.com&amp;x=99e8f192"><http://publications.horizonhobby.com/read/archive?id=1223&amp;e=kevin@wenzlerarchitects.com&amp;x=99e8f192></A>
</SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"><BR>
</SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"><BR> </SPAN></FONT>
<P align=right><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN><FONT size=2><SPAN
style="FONT-SIZE: 7.5pt"><B>February 28, 2008
</B></SPAN></FONT><SPAN style="FONT-SIZE: 9pt"> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"><BR> <BR> <BR>
</SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"></SPAN></FONT>
<P><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"> </SPAN></FONT>
<P align=center><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 9pt"><BR> </SPAN><FONT size=2><SPAN
style="FONT-SIZE: 7.5pt">PLEASE VISIT <FONT
color=#ffffff>WWW.SPEKTRUMRC.COM/GIVEAWAY</FONT> <A
href="http://publications.horizonhobby.com/t/322561/1056524/7046/0/"><http://publications.horizonhobby.com/t/322561/1056524/7046/0/></A>
FOR MORE INFORMATION<BR></SPAN></FONT><SPAN
style="FONT-SIZE: 9pt"><BR> </SPAN><FONT size=1><SPAN
style="FONT-SIZE: 7pt">Copyright © 2008 Horizon Hobby. All rights
reserved.<BR>If you no longer wish to receive this newsletter,
you may <FONT color=#ffffff><B>unsubscribe</B></FONT> <A
href="mailto:leave-322561-1056524.eb728df499487cb49c599c8dbafb4236@publications.horizonhobby.com"><mailto:leave-322561-1056524.eb728df499487cb49c599c8dbafb4236@publications.horizonhobby.com></A>
<BR>Please send any questions, comments, or concerns to
<FONT color=#ffffff><B>webmaster@spektrumrc.com</B></FONT> <A
href="mailto:webmaster@horizonhobby.com"><mailto:webmaster@horizonhobby.com></A>
<BR><B>Mailing Address:</B> Horizon Hobby, Inc., 4105
Fieldstone Rd., Champaign, IL 61822<BR>Spektrum is
used with permission from Bachmann Industries,
Inc.<BR></SPAN></FONT><SPAN
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I am curious what “noise” from a house is detectable on a Spectrum
Analyzer tuned to a center frequency of 2.4 GHz? Not even a
900 MHz wireless phone would even come close. Microwave? No wrong
frequency, Wi Fi networks? No, wrong frequency. Granted if
you tune the analyzer’s center frequency well beyond 2.4 you might be
able to see other signals or noise but the narrow bandwidth the 2.4
operates in and the clean signal/noise ratio doesn’t lend itself to the
idea of house noise causing interference. Also, unless you can
narrow the display bandwidth way down then you won’t see any frequency
“hopping”. The shift is very close to the carrier and unless you
know what to look for then you can miss it. <BR> <BR>
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