[hpsdr] QSD gain and noise.

[Robert McGwier]

I can't believe how many times this mistake is made.  I made it myself 
about four times.  I keep "rediscovering" this guaranteed source of 
jitter and phase noise.  The frequency will have to be an even divisor 
of the clock on you will have more spurs at sin(x)/x amplitudes than you 
can even believe.

Bob



Phil Harman wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi Phil.
> 
> Just use the sign bit from the NCO  and use this to generate a square wave. 
> I think that Johan has this working already.
> 
> Phil...
> 
>

-- 
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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