[hpsdr] Digital Voice and HPSDR

[Chris Albertson]

I think you have it right now.   But SDR has the potential to change
the way we use these modes.   With a conventional radio we tune to one
frequncy then send the audio output to a demodulator speciifc to that
mode, be it DRM, PSK or whatever.

With an SDR we can do two things differently:

1) We don't need to first convert to audio.  If fact it's a silly
waste of CPU cycles to do it that way. the software can look at the
power spectra in the IF and not bother converting to audio and then
back to digital again.

2) because of #1 above, we can demodulate ALL of the digital modes in
the entire band (within bandwidth limits of the SDR) simultaneously.
And I include CW as a digital mode.

But for now, yes or SDRs are used to emulate old style 80's vintage
analog radios and you can work digital modes the same say

On Tue, Nov 2, 2010 at 11:31 AM, John Petrich <petrich at u.washington.edu> wrote:

> Another wrong assumption was that I thought that DRM = DV on the PowerSDR
> GUI for HPSDR.  Not so.  It is best to approach DV on HPSDR the same way one
> would approach any of the non-DV digital modes.  In essence all one needs is
> to enable the proper pathway for digital operation in PowerSDR, enable VAC
> and enable the proper DV software application.  The remaining challange is
> to try and find someone to talk to.  The calling frequency for 20 meters is
> 14.236 MHz.
>
> It seems that DV operation is within reach of any of us who want to try DV,
> the same way that PSK, Olivia, etc are in reach.
-- 
=====
Chris Albertson
Redondo Beach, California

 1288729873.0