Tutorials/k0SDR/Tutorial05: uhd_exp1.rb.txt

defProperty('rxfreq',  2400e6, "Starting rx frequency")
defProperty('rxstep',  10e6, "Rx frequency increments")
defProperty('nfreq',   10, "Number of frequency steps")
defProperty('dwell',   10, "Number of seconds at each frequency step")


defGroup('rxnode', 'node1-1.grid.orbit-lab.org,node1-2.grid.orbit-lab.org,node1-19.grid.orbit-lab.org,node1-20.grid.orbit-lab.org') 

{ |n|
}


onEvent(:ALL_UP) do |event|
  info "Give machines some time to warm up"
  wait 4


  allGroups.uhd.u0.activate                        # starts uhd_daemon
  wait 3

  group("rxnode").uhd.u0.rxrate = "8e6"            # set receive chain sampling rate
  group("rxnode").uhd.u0.rxgain = "20"             # set receive chain gain (dB)
  group("rxnode").uhd.u0.numbins = "128"           # set size of fft
  group("rxnode").uhd.u0.avgwinlen = "32"          # set averaging window size for each fft bin across time.  

  group("rxnode").uhd.u0.omlfile = "spectrum.grid" # oml database filename to store fft data
  group("rxnode").uhd.u0.omlserver = "idb2:3003"   # oml server

  group("rxnode").uhd.u0.record                    # enable recording thread

  (0..property.nfreq).each { |i|                   # set up loop
    cf = property.rxfreq + (property.rxstep*i)     # compute next carrier frequency
    group("rxnode").uhd.u0.rxfreq = cf             # set receive chain carrier frequency (Hz)

    wait property.dwell                            # wait for number of seconds before computing next frequency
  }

  group("rxnode").uhd.u0.stop                      # stop recording thread

  allGroups.uhd.u0.deactivate                      # turn off uhd_daemon


  info "Finish it."
  Experiment.done
end