On 1/25/2011 1:26 PM, Gerhard Hoffmann wrote:
Am 25.01.2011 15:35, schrieb Ulrich Bangert:
see page 8.6ff of the service manual to see that the HP3325 is not
DDS based
but uses a "Fractional N Synthesizer scheme" which is something
completely
different and is not prone to the described effects.
Yes, it's f-N, I must have stored that in the wrong winding of my
brain...
Fortunately, I had no need to repair my 3325B upto now.
BTW, your effect has been described in detail in the article that
Bruce cited on jan7 in the NoStateOfTheArtCounter thread.
<http://sdrforum.org/pages/sdr06/sdr06_papers/1.3/1.3-01.pdf >
(seems not to work anymore, may be a typo of mine)
Now it seems to be found as the first doc in session 1.3 here:
http://groups.winnforum.org/p/cm/ld/fid=58
In the meantime, I have published my sin/cos table on
http://opencores.org/project,sincos
It should be easy to generate a version with BCD-coded phase input
to make a decimal-friendly DDS.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
