How to use Input 2 of Red Pitaya

Bob Wilson, N6TV

First, move the jumper across Pins 3 and 5 for both IN1 and IN2 as shown in the photo, here:

Then edit the file on the Red Pitaya to assign each receiver slice to an input (1 or 2).

Assuming Ubuntu Linux, step-by-step:
  1. Exit CW Skimmer Server on Windows
  2. Use PuTTY to connect to your Red Pitaya Ubuntu command prompt via ssh (userid root)
  3. cd /opt/redpitaya/www/apps/sdr_receiver_hpsdr 
  4. rw (puts file system in read/write mode)
  5. nano (opens full screen text editor)
  6. Change:

    /opt/redpitaya/www/apps/sdr_receiver_hpsdr/sdr-receiver-hpsdr 1 1 1 1 1 1 1 1 &


    /opt/redpitaya/www/apps/sdr_receiver_hpsdr/sdr-receiver-hpsdr 1 1 1 1 2 2 2 2 &

    (Do not delete the ampersand at the end).

  7. Press Ctrl-X to exit and reply YES to save the edited file
  8. ro (puts file system back  into read only mode)
  9. ./ (stops the current skimmer instance)
  10. /etc/rc.local (restarts the skimmer, assuming you already have it auto-starting, if not, use the Web Browser GUI interface to restart it)
  11. The SDR app should restart, and input 2 should be dedicated to the last 4 receiver slices.  The frequency of each slice is determined by the setting selecting CW Skimmer Server
  12. You can check if the SDR is running with these parameters by typing the Ubuntu command:

    ps aux | grep -i sdr

    And you'll see something like this in response, indicating the process is running with the new parameters:
    root      1571 40.3  0.0   9076    32 ?        Sl   Sep20 556:54 /opt/redpitaya/www/apps/sdr_receiver_hpsdr/sdr-receiver-hpsdr 1 1 1 1 2 2 2 2
    root      2215  0.0  0.1   3732   540 pts/0    S+   22:36   0:00 grep --color=auto -i sdr
(Ignore the last line, that's the grep command itself)

Bob, N6TV

---In RBN-OPS@..., <e20gmy@...> wrote :


Any change require on the software to connect another antenna to Red Pitaya port 2?

Phot / E20GMY

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