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<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Allan,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>in a range test situation you are going to be getting the
worst possible readings on the flight data log. You could be holding the range
test button and be on the fringes of loosing range yet the system is still
working. The Flight data device will tell you exactly that. Which it
did.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Here is what I do with the data log device. I will use a
second person to hold the model. I then will walk to a spot where the data
starts to show lager numbers of fades. Its doing its job telling you the signal
is getting weak.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>I then will find the spot a little closer that has the best
"low" fades. This is where the signal starts to get "fuzzy" and the range is
still solid but further out it starts to increase the fades. With the model on
the ground, and you on the ground "level with it" the range test button
depressed you are giving the system its worst possible scenario. Of course the
flt log will show this.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>I then will make a note of this location where the range
starts to fade.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Simply walking until it stops working like we did with
72mhz stuff is going to show a ton of fades....Remember this thing is taking
readings 50-60 a sec. So to get 200-300-500 fades putting the range test process
in place you are are only talking about 10 secs. tops with weak signal. So think
about what is going on...this is a tool and along with it comes some analysis of
what is really happening and what the numbers mean. Its not a device that is a
green light for go and red light for NO.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>So find the spot where you are not getting large numbers of
fades..this is your range check distance. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Now start up the engine and go to this same spot....you
could have similar numbers of fades...remember that a given antenna may be
blocked partially depending on model orientation to you and the TX. So I will
walk around the model at this given distance and have my buddy looking at the
flt data log. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>This tells me how its performing. Is this type of device
for everybody Nope its not but its a powerful tool if you think about what the
tool is telling you. The real test is in the air, because the data logger is
going to rack up bigger numbers while under the range test scenario....but fly
it and you will see what is happening. Also in looking at those number
100fades is about 2-3 secs worth of weak signal....this is a really small amount
of time, and it doesn't mean the system is in hold...it just means a given
antenna is getting weak signal for that amount of time. Compared to the number
of seconds in a flight...that's low, and beside a fade doesn't mean its not
getting signal just that its weak signal...and the signal from other antennas
are stronger and the system is using those. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>If you have a weak signal for all antennas at the same time
you could get a frame loss. It takes 45 frame losses in a row to make the
system go into hold and this all happens in less than a second. So to really
look at these numbers they have to be really really high to have a
problem..</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>For normal use in a pattern model I'm getting about 100-150
fades on the main A-B antennas and low numbers on the remotes. My remotes are
behind the wing down the tail of a wood model. I have the remotes with antennas
mounted in different axis and planes to get the best diversity possible. I often
have single digit fades on the two remotes. Its common to get a few Frame losses
but its also common to have zero. I have seen numbers as high as 20-30 on the
frame losses...never seen any holds from a flying
situation.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Turning your RX on before the TX can affect your numbers
and of course turning the TX off before the taking readings on the RX will also
add to your numbers.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Obviously the instructions for this little device are not
as clear as they could be but if you think about it and what the data is telling
you...its well worth having it. Just think about the numbers mean and how
quickly the tick marks can build up in a range test
situation.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Troy Newman</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2>Team JR</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=546410720-26062008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV><FONT face=Arial color=#0000ff
size=2></FONT><FONT face=Arial color=#0000ff size=2></FONT><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of
</B>AWorrest@aol.com<BR><B>Sent:</B> Thursday, June 26, 2008 11:51
AM<BR><B>To:</B> nsrca-discussion@lists.nsrca.org<BR><B>Subject:</B> Re:
[NSRCA-discussion] 2.4Ghz<BR></FONT><BR></DIV>
<DIV></DIV><FONT face=arial,helvetica><FONT lang=0 face=Arial size=2
FAMILY="SANSSERIF" PTSIZE="10">I've got mixed opinions about the flight log. I
flew my pattern ship all last year using a DX7 and the AR7000 with no problems.
Later I bought the flight log and tested it on the AR7000. While it showed
correctly there were two receivers in operation, some of the other readings were
strange. It turned out my AR7000 wasn't upgraded to support the flight log.
Still the flight log acted as if it did.<BR><BR>Recently I bought a R921 on
e-Bay. I range tested it with the flight log. The readings were terrible. I sent
the R921 back to Horizon. They could find nothing wrong. When it returned I
tested it again. Still bad readings. Talked to Horizon again. Was told to try it
in a plane. Before doing that, one more time I range tested it on top of a paper
box. Did the exact same thing with two receivers that I had successfully test
flow in an airplane. This last test, the "bad" receiver had better numbers than
the two "good" ones!<BR><BR>I'm now wondering if these receivers retain some
information after being turned off and this leads to erratic flight log
readings. BTW, someone on one of the discussion lists says when there is a frame
lost it is not counted as an antenna fade. I don't know if this is true but it
does make the math work. Yes, I've had on occasion more frame losses than
antenna fades.<BR><BR>Allan<BR><BR>In a message dated 6/25/2008 9:20:15 AM
Central Daylight Time, jlkonn@hotmail.com writes:<BR><BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"
TYPE="CITE">I am curious what other folk's experience has been with
JR/Spektrum 2.4Ghz.<BR>I have experienced a frame loss when one satelite Rx
showed -0- fades. It's my understanding <BR>this shouldn't happen.
I have another 9ch Rx from the "Great Receiver Giveaway" I'm going to <BR>try
but was wondering what others are finding is average for fades and frame
losses per
flight?<BR>Thanks!<BR>JLK<BR></BLOCKQUOTE><BR><BR></FONT><BR><BR><BR>**************<BR>Gas
prices getting you down? Search AOL Autos for fuel-efficient used
cars.<BR>(http://autos.aol.com/used?ncid=aolaut00050000000007)
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