[Lowfer] WE2XGR/2 in WSPR mode

[Bill Ashlock]

Thanks John,
 
Very interesting modulation mode as well as the structure already in place for WSPR transmissions. Since my original query I downloaded the following: http://www.physics.princeton.edu/pulsar/K1JT/WSPR_mode.pdf and found it to be helpful in understanding how it works.
 
Has anyone tried WSPR on the 1750M Lowfer band? The 30 KHz available (minus the space taken up by the broadcast stations) should allow for 100s of 5.9Hz wide frequency allocations. The slower QSB rates might be an even better match for the modulation characteristics. 
 
Bill> Date: Wed, 28 Jan 2009 18:53:49 -0500> From: w1tag at charter.net> To: lowfer at mailman.qth.net> Subject: Re: [Lowfer] WE2XGR/2 in WSPR mode> > Bill,> > > Now I'm wondering if the SSB requirement may be only for > > receiving and a linear final may not be needed for transmitting.> > An SSB exciter would be needed to translate the sound card audio up to > the desired radio frequency. But since WSPR works by frequency shift > keying, and only one tone is present at a time, linear amplification is > not required once the RF signal is created.> > Actually, for this mode you could dispense with SSB generator if you > could program a DDS chip to do the proper shifts in the right sequence.> > John A.> _______________________________________________> >From the Lowfer mailing list> Send messages to: Lowfer at mailman.qth.net> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer
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