"gareth" wrote in message
...
Presumably those SDR rigs which do not work on the IF but
directly from antennae must have, separately from the DSP processor,
some semblance of a DDS generator (but without the final DAC) to
act as the equivalent of the VFO, for I cannot perceive that a
fractional-Hz
tuning rate could be achieved with machine code running in the DSP
processor?

Thanks to all who responded, even he whose post was riddled throughout
with gratuitous rudeness, and it seems that I was almost correct, but with
the
exception of Brian Morrison's URL where the heterodyning was done
with a PLL and fractional-N synthesizer.

I wonder if Mr.Gratuitously Rude actually read through his URL reference
for therein is a clear reference to the phase accumulator, a necessary
part of the DDS process?

On Sun, 7 Feb 2016 12:40:57 -0000
"gareth" wrote:


I wonder if Mr.Gratuitously Rude actually read through his URL
reference for therein is a clear reference to the phase accumulator,
a necessary part of the DDS process?

When did you drop the "I never follow URLs" rule, Gareth?

Bernie wrote:
On Sun, 7 Feb 2016 12:40:57 -0000
"gareth" wrote:


I wonder if Mr.Gratuitously Rude actually read through his URL
reference for therein is a clear reference to the phase accumulator,
a necessary part of the DDS process?

When did you drop the "I never follow URLs" rule, Gareth?

Principles have always been fluid for our Gareth.

--
STC // M0TEY // twitter.com/ukradioamateur

"Stephen Thomas Cole" wrote in message
...
Bernie wrote:
On Sun, 7 Feb 2016 12:40:57 -0000
"gareth" wrote:
I wonder if Mr.Gratuitously Rude actually read through his URL
reference for therein is a clear reference to the phase accumulator,
a necessary part of the DDS process?

When did you drop the "I never follow URLs" rule, Gareth?

Principles have always been fluid for our Gareth.


Eh? I thought he was teetotal.
--
;-)
..
73 de Frank Turner-Smith G3VKI - mine's a pint.
..
http://turner-smith.uk