[hpsdr] PowerSDR Wish List

[David McQuate]

There are versions of the Mercury fpga code that support up to 4 
simultaneous independent receivers.  John Melton has been writing PC 
programs that support this capability, especially on Linux.  His 
approach includes a "server" that interfaces to the hardware and splits 
out data streams for each of the receivers, sending those via UDP 
packets (ethernet).  Up to 4 instances of "dspserver" perform all the 
filtering & digital processing.  A like number of user interface 
instances allow the user to adjust frequency, bandwidth, etc.  For 
Linux, "ghpsdr3" provides these capabiilities for receive.  He's working 
on extending all pieces to include transmit, and to do it in a way that 
is easily ported to different platforms (Linux, Windows...).  (The 
server now supports either USB ("Ozy") or ethernet ("Metis") connection 
between the PC and the hpsdr hardware.)  An early version having minimal 
(but useful) control of multiple receivers has been ported to Windows.

http://openhpsdr.org/wiki/index.php?title=Ghpsdr3

73,
Dave
wa8ywq

On 4/27/2011 7:12 PM, Luke Steele wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> This is probably a comment rather than a wishlist item, as I believe I have
> simply observed a limitation of PowerSDR.
>
> Sometimes DX ops use a large split when using SSB. For example, on 40m
> calling below 7100 kHz, and listening up around 7185, or 7215, etc.
> Similarly on 20m, for reason of the split band segments of different US
> licence classes. With one Mercury board fitted and using the sub receiver I
> find I cannot use dual receiver instances when such wide splits are used. I
> can still split the old fashioned, single receiver way by toggling the
> "A<>B" VFO button to hear alternately the DX and the QSX. Naturally I have
> explored the different sampling rates, and can get a wider split on 192
> kHz, but still find that I cannot have receivers operating on both DX and
> QSX frequencies simultaneously.
> This is probably of minor inconvenience to me, as I mostly use 96 kHz
> sampling rate, and operate CW, where the splits are almost never greater
> than several kHz. But I thought I might just raise this as an issue, incase
> I have overlooked something obvious and someone can set this straight for
> me! Other than this, my HPSDR system is the best transceiver I have used.
> 73,
> Luke VK3HJ
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