Softrock Ensemble Afternoon 6

Running QUISK on Ubuntu 10.10 (32bit)

Click here for a larger image

I have been struggling to get the SDR software to run on my laptops.

After some screwing around last night and then again this morning (Linux+XP VM, XP on a Netbook, etc) I decided to spend sometime trying to get QUISK working under native Linux.

Here are the steps to make it work:

  1. I added a USB soundcard to the laptop (driving some external speakers)
  2. I have the Softrock Ensemble RXTX audio out connected to the laptop's internal Line/Mic "in" connector
  3. I have the Laptop and PCB connected with a USB cable
  4. I have a bench power supply providing 12.9vdc to the PCB
  5. I then I copied the conf file:
    cp home/me/quisk-3.4.12/softrock/  /home/me/

  6. I then updated the file with the following settings:
    sample_rate = 48000
    name_of_sound_capt = "hw:0"
         ##This is the internal sound card
    name_of_sound_play = "hw:1"
        ##This is the USB sound card

I was able to launch QUISK ( and then PCB initially with my signal generator as the source. Once I was able to confirm that worked I was able to connect the PCB to my 40m dipole and hear some CW near the bottom of the band.

Magic... SDR reception with Ubuntu 10.10+quisk on my laptop.

I am still battling a bit of a pulsing or surging in the audio after a few minutes that seems tied to CPU performance.  For testing purposes I have proved that I can receive signals so I should be able to move on to the next building steps. (I can come back around to work through the performance issues later.)

73 de NG0R