[hpsdr] Mercury sampling rate

[Lyle Johnson]

Hello Chuck!

> "Sorry your question did not get answered. At present the only software that
> supports HPSDR is PowerSDR. Hence all the features of that software are
> available in terms of sample rates, recording of data and archival. PowerSDR
> will allow you to record either I and Q data at up to 192kHz or the
> demodulated audio output.  Recording of I and Q at 192kHz allows you to
> replay the original recording and tune over the entire 192kHz looking for
> signals."
> 
> That's not good news to those of us that were counting on the ability to
> capture all or most of a band. Nor does it match up with other platforms
> like Perseus (currently records 800 kHz), QS1R (recording not implemented
> yet but transfers 1 to 2 MHz worth of samples to the PC), or the SDR-IQ
> which records 190 kHz of spectrum.
> 
> I do think it will be important for Mercury to improve the recording
> performance...

Please note that the QS1R software (SDRII Max) is open source, and 
should be able to be modified in such a way as to support Mercury. In 
fact, it should be fairly easy to do, since the heart of Mercury was 
conceived by, and development has occurred with lots of exchanges with, 
Phil, N8VB.  Same ADC, same capability in the FPGA, same USB interface 
processor...  It's easy for me to say this, of course, since I don't 
touch PC-based software :-)

PowerSDR is also open source, and the 192 kHz limitation I suspect can 
be worked around in that package, too.

What Phil is saying is at at this instant in time, with Mercury still in 
prototype/Alpha development, it can do *already* do all that PowerSDR 
can do, which is quite a lot.

Remember, Mercury is not a canned product, cast in stone and provided by 
faceless third-parties who are after the contents of your wallet.

It is a lego-style building block for experimentation, self-education 
and development.  If there is a feature lacking in the software support, 
the fact that it is open source is in part so one or two people need not 
be burdened with all the issues of development.

I am sure when Mercury is released, people will be adding support for it 
to their existing software, and others will be able to modify (or write) 
software for particular applications and emphasis.

A year from now, Mercury will be doing all sorts of things that it does 
not do now.  Or three months from now...

I can hardly wait!

73,

Lyle KK7P






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