[Skimmertalk] Red Pitaya Input 2

Bob Wilson, N6TV n6tv at arrl.net
Fri Oct 20 16:04:56 EDT 2017

Using CWSL_Tee with six receiver slices assignable in any combination to
Inputs 1 and 2, you can already run CW Skimmer, RTTY Skimmer, HDSDR (as
many copies as you like), and receive on WSJT-X on 6 bands using Virtual
Audio Cable (VAC) to feed the audio output of HDSDR to WSJT-X, all in
parallel on a single PC.  I don't think the Hermes interface standard
supports simultaneous access by multiple PCs to a Hermes receiver stream.
Making that work would probably require a ton of new programming.

All of the fancy Red Pitaya apps reprogram the FPGA with a custom binary
file before starting, so I assume the FPGA can only be programmed to do one
thing at a time, even with two input streams coming from the two ADCs.  Of
course the Oscilloscopeope app / dual channel signal generator is sort of
doing 4 things at once in a single app., but that's not the same as
streaming the Ethernet output to two PCs simultaneously.

Bob, N6TV

On Oct 20, 2017 9:23 AM, "David Robbins" <k1ttt at verizon.net> wrote:

Since the rp has 2 a/d's would it not be possible to set up two versions of
the application to timeshare and output two separate streams from the two
inputs?  I'm thinking of streaming 2 sets of data over the Ethernet port to
different computers or different instances of the hermesintf.dll on one
computer to use cw or rtty skimmer or other apps on the pc's... or is the
fpga or cpu up against some limit on handling what it does for one

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373

-----Original Message-----
From: Skimmertalk [mailto:skimmertalk-bounces at contesting.com] On Behalf Of
Bob Wilson, N6TV
Sent: Friday, October 20, 2017 15:11
To: SkimmerTalk Reflector
Subject: Re: [Skimmertalk] Red Pitaya Input 2

On Oct 20, 2017 4:01 AM, <dd5xx at web.de> wrote:
> Would be nice if you could run sdr_transceiver_wspr on input1, while
> sdr_receiver_hpsdr on input2. Is that possible?

The FPGA can only be configured to run one application at a time, so running
both apps at the same time it's not supported.

Bob, N6TV
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