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Re: [Discuss-gnuradio] Basic Bandwidth math


From: Robert McGwier
Subject: Re: [Discuss-gnuradio] Basic Bandwidth math
Date: Thu, 06 Sep 2007 22:50:47 -0400
User-agent: Thunderbird 2.0.0.6 (Windows/20070728)

Never mind. My math mind is as bad as yours today. There is 150 Hz of separation between what I assume is the 3 dB points.

Sorry

Bob


Robert McGwier wrote:
The adjacent channel interference will be horrendous since one channel overlaps the next door neighbor by 50 Hz.

Bob


Eric Blossom wrote:
On Thu, Sep 06, 2007 at 11:56:30AM -0400, Jeffrey Karrels wrote:
Ok. I am having a world of problems today, the main one being
determining if it is my issues causing the headache or the headache
causing the issues. ;)

I have a basic bandwidth limit that I am hitting and for some reason I
cannot do basic math today.

I am trying to see how many carriers I can transmit on. I am mixing a
single gmsk modulated source with LOs in software and seeing how many
times I can do that. A single channel is 250kHz wide and the channels
are 400kHz apart center to center. In other words my LOs are 400e3,
800e3, ...

How many carriers would you expect that I could transmit on?


Thanks
Jeff
P.S. Sorry in advance, I am nuts today.




--
AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL,
TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair
"If you're going to be crazy, you have to get paid for it or
else you're going to be locked up." Hunter S. Thompson




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