[NSRCA-discussion] SPECKTRUM Modules for Futaba and JR

[jonlowe at aol.com]

I agree, and didn't mean to imply anything else.  There will still need 
to be impounding at large events and a limitation of pins that can be 
out, or nobody will be able to fly.  For consistency, anyone at our 
local club still has to have a pin, DSS or not.

Jon

-----Original Message-----
From: tony at radiosouthrc.com
To: nsrca-discussion at lists.nsrca.org
Sent: Fri, 23 Feb 2007 8:12 AM
Subject: Re: [NSRCA-discussion] SPECKTRUM Modules for Futaba and JR

Jon:
They don’t have to be in the air!  Just take something like the Joe 
Nall event for example.  No frequency pins for DSS.  It would be VERY 
easy to have 40 systems on at the same time!  Some playing with 
foamies, some adjusting models and some getting ready to fly.  You 
could be at the flight line to fly, turn on and find that the system 
will not operate because all the 2.4 channels are in use!  That is why 
there needs to be frequency pins for DSS and you should not turn them 
on when you are not in possession of a pin.  No, you won’t cause a 
crash, but you could fill up the band!

 

 

Tony Stillman, President

Radio South

3702 N. Pace Blvd

Pensacola, FL 32505

1-800-962-7802

www.radiosouthrc.com


 

--------

 From: nsrca-discussion-bounces at lists.nsrca.org 
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of 
JonLowe at aol.com
Sent: Thursday, February 22, 2007 9:26 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] SPECKTRUM Modules for Futaba and JR


 

In a message dated 2/22/2007 6:52:04 PM Central Standard Time, 
patterndude at tx.rr.com writes:


What does Spectral capacity - 40 systems mean?  Is this the number of 
tranmitters that can operate in range of each other, or is this 40 
channels or what?


--Lance


 



This is grossly simplified, but the 2.4 ghz band has about 80 
frequencies.  Each Spektrum unit picks two unused frequencies and 
transmits on both.  80/2=40 transmitters that can operate at once.  It 
is a requirement of the FCC that things on this band don't interfere 
with each other, and transmitter power is strictly regulated, therefore 
anything using the band has to check before transmitting.  You have no 
idea which two frequencies you are on (nor do you care), as they change 
each time the transmitter turns on.


 


I've flown my Dad's Arresti III with the DX7 extensively.  Absolutely 
solid link, with no fear of getting shot down.  I have been waiting for 
something like the modules so I could use a decent transmitter for 
things like throttle curves, conditional mixes, etc.


 


I don't want to be at a field that has 40 airplanes in the air at once!



 


Jon Lowe






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