options:
  parameters:
    author: Example
    catch_exceptions: 'True'
    category: Custom
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: UHD FFT Waveform Plotter
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: uhd_fft
    max_nouts: '0'
    output_language: python
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: prompt
    sizing_mode: fixed
    thread_safe_setters: ''
    title: UHD FFT
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 4.0]
    rotation: 0
    state: enabled

blocks:
- name: ant
  id: variable_qtgui_chooser
  parameters:
    comment: ''
    gui_hint: 4,2,1,2
    label: Antenna
    label0: RX2
    label1: TX/RX
    label2: J1
    label3: J2
    label4: ''
    labels: '[]'
    num_opts: '4'
    option0: RX2
    option1: TX/RX
    option2: J1
    option3: J2
    option4: '4'
    options: '[0, 1, 2]'
    orient: Qt.QVBoxLayout
    type: string
    value: antenna
    widget: combo_box
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [704, 220.0]
    rotation: 0
    state: enabled
- name: chan0_lo_locked
  id: variable_function_probe
  parameters:
    block_id: uhd_usrp_source_0
    comment: ''
    function_args: '"''lo_locked''"'
    function_name: get_sensor
    poll_rate: '10'
    value: uhd.sensor_value("", False, "", "")
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [880, 132.0]
    rotation: 0
    state: disabled
- name: current_freq_c
  id: variable_function_probe
  parameters:
    block_id: uhd_usrp_source_0
    comment: ''
    function_args: '"''lo_locked''"'
    function_name: get_sensor
    poll_rate: '10'
    value: freq_c
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [880, 252.0]
    rotation: 0
    state: disabled
- name: freq_c
  id: variable_qtgui_entry
  parameters:
    comment: ''
    gui_hint: 3,0,1,2
    label: RX Tune Frequency
    type: real
    value: freq
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [304, 220.0]
    rotation: 0
    state: enabled
- name: gain_
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: 2,0,1,4
    label: RX Gain
    min_len: '200'
    orient: Qt.Horizontal
    rangeType: float
    start: '0'
    step: '.5'
    stop: '31.5'
    value: gain
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [584, 220.0]
    rotation: 0
    state: enabled
- name: lo_locked_probe
  id: variable_qtgui_label
  parameters:
    comment: ''
    formatter: None
    gui_hint: 4,0,1,2
    label: LO locked
    type: bool
    value: chan0_lo_locked.to_bool()
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [880, 372.0]
    rotation: 0
    state: disabled
- name: samp_rate_
  id: variable_qtgui_entry
  parameters:
    comment: ''
    gui_hint: 3,2,1,2
    label: Sampling Rate
    type: real
    value: samp_rate
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [456, 220.0]
    rotation: 0
    state: enabled
- name: uhd_version_info
  id: variable_qtgui_label
  parameters:
    comment: ''
    formatter: None
    gui_hint: 1,0,1,2
    label: UHD Version
    type: string
    value: uhd.get_version_string()
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [456, 132.0]
    rotation: 0
    state: enabled
- name: usrp_device_info
  id: variable_qtgui_label
  parameters:
    comment: ''
    formatter: None
    gui_hint: 1,2,1,2
    label: Device Information
    type: raw
    value: uhd.get_version_string()
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [632, 132.0]
    rotation: 0
    state: enabled
- name: antenna
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Antenna
    short_id: A
    type: ''
    value: '"RX2"'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [784, 4.0]
    rotation: 0
    state: enabled
- name: args
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: UHD device address args
    short_id: a
    type: ''
    value: '""'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [176, 4.0]
    rotation: 0
    state: enabled
- name: display
  id: qtgui_tab_widget
  parameters:
    alias: ''
    comment: ''
    gui_hint: 0,0,1,4
    label0: Spectrum
    label1: Waterfall
    label10: Tab 10
    label11: Tab 11
    label12: Tab 12
    label13: Tab 13
    label14: Tab 14
    label15: Tab 15
    label16: Tab 16
    label17: Tab 17
    label18: Tab 18
    label19: Tab 19
    label2: Scope
    label3: Tab 3
    label4: Tab 4
    label5: Tab 5
    label6: Tab 6
    label7: Tab 7
    label8: Tab 8
    label9: Tab 9
    num_tabs: '3'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 180.0]
    rotation: 0
    state: enabled
- name: fft_size
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Set number of FFT bins
    short_id: ''
    type: intx
    value: '1024'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1104, 4.0]
    rotation: 0
    state: enabled
- name: freq
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Default Frequency
    short_id: f
    type: eng_float
    value: 2.45e9
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [464, 4.0]
    rotation: 0
    state: enabled
- name: gain
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Set gain in dB (default is midpoint)
    short_id: g
    type: eng_float
    value: '20'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [616, 4.0]
    rotation: 0
    state: enabled
- name: import_0
  id: import
  parameters:
    alias: ''
    comment: ''
    imports: import numpy
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 124.0]
    rotation: 0
    state: enabled
- name: qtgui_freq_sink_x_0
  id: qtgui_freq_sink_x
  parameters:
    affinity: ''
    alias: ''
    alpha1: '1.0'
    alpha10: '1.0'
    alpha2: '1.0'
    alpha3: '1.0'
    alpha4: '1.0'
    alpha5: '1.0'
    alpha6: '1.0'
    alpha7: '1.0'
    alpha8: '1.0'
    alpha9: '1.0'
    autoscale: 'False'
    average: '0.1'
    axislabels: 'True'
    bw: samp_rate_
    color1: '"blue"'
    color10: '"dark blue"'
    color2: '"red"'
    color3: '"green"'
    color4: '"black"'
    color5: '"cyan"'
    color6: '"magenta"'
    color7: '"yellow"'
    color8: '"dark red"'
    color9: '"dark green"'
    comment: ''
    ctrlpanel: 'True'
    fc: freq
    fftsize: fft_size
    freqhalf: 'True'
    grid: 'True'
    gui_hint: display@0:0,0,1,4
    label: Relative Gain
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'False'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: ''
    nconnections: '1'
    showports: 'False'
    tr_chan: '0'
    tr_level: '0.0'
    tr_mode: qtgui.TRIG_MODE_FREE
    tr_tag: '""'
    type: complex
    units: dB
    update_time: update_rate
    width1: '1'
    width10: '1'
    width2: '1'
    width3: '1'
    width4: '1'
    width5: '1'
    width6: '1'
    width7: '1'
    width8: '1'
    width9: '1'
    wintype: window.WIN_BLACKMAN_hARRIS
    ymax: '10'
    ymin: '-140'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [64, 296.0]
    rotation: 180
    state: enabled
- name: qtgui_time_sink_x_0
  id: qtgui_time_sink_x
  parameters:
    affinity: ''
    alias: ''
    alpha1: '1.0'
    alpha10: '1.0'
    alpha2: '1.0'
    alpha3: '1.0'
    alpha4: '1.0'
    alpha5: '1.0'
    alpha6: '1.0'
    alpha7: '1.0'
    alpha8: '1.0'
    alpha9: '1.0'
    autoscale: 'True'
    axislabels: 'True'
    color1: blue
    color10: dark blue
    color2: red
    color3: green
    color4: black
    color5: cyan
    color6: magenta
    color7: yellow
    color8: dark red
    color9: dark green
    comment: ''
    ctrlpanel: 'True'
    entags: 'True'
    grid: 'False'
    gui_hint: display@2:0,0,1,4
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'False'
    marker1: '-1'
    marker10: '-1'
    marker2: '-1'
    marker3: '-1'
    marker4: '-1'
    marker5: '-1'
    marker6: '-1'
    marker7: '-1'
    marker8: '-1'
    marker9: '-1'
    name: ''
    nconnections: '1'
    size: '1024'
    srate: samp_rate_
    stemplot: 'False'
    style1: '1'
    style10: '1'
    style2: '1'
    style3: '1'
    style4: '1'
    style5: '1'
    style6: '1'
    style7: '1'
    style8: '1'
    style9: '1'
    tr_chan: '0'
    tr_delay: '0'
    tr_level: '0.0'
    tr_mode: qtgui.TRIG_MODE_FREE
    tr_slope: qtgui.TRIG_SLOPE_POS
    tr_tag: '""'
    type: complex
    update_time: update_rate
    width1: '1'
    width10: '1'
    width2: '1'
    width3: '1'
    width4: '1'
    width5: '1'
    width6: '1'
    width7: '1'
    width8: '1'
    width9: '1'
    ylabel: Amplitude
    ymax: '1'
    ymin: '-1'
    yunit: '""'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [336, 484.0]
    rotation: 0
    state: enabled
- name: qtgui_waterfall_sink_x_0
  id: qtgui_waterfall_sink_x
  parameters:
    affinity: ''
    alias: ''
    alpha1: '1.0'
    alpha10: '1.0'
    alpha2: '1.0'
    alpha3: '1.0'
    alpha4: '1.0'
    alpha5: '1.0'
    alpha6: '1.0'
    alpha7: '1.0'
    alpha8: '1.0'
    alpha9: '1.0'
    axislabels: 'True'
    bw: samp_rate_
    color1: '0'
    color10: '0'
    color2: '0'
    color3: '0'
    color4: '0'
    color5: '0'
    color6: '0'
    color7: '0'
    color8: '0'
    color9: '0'
    comment: ''
    fc: freq
    fftsize: '1024'
    freqhalf: 'True'
    grid: 'False'
    gui_hint: display@1:0,0,1,4
    int_max: '10'
    int_min: '-140'
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: ''
    nconnections: '1'
    showports: 'True'
    type: complex
    update_time: update_rate
    wintype: window.WIN_BLACKMAN_hARRIS
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [336, 360.0]
    rotation: 0
    state: enabled
- name: samp_rate
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Sample Rate
    short_id: s
    type: eng_float
    value: 1e6
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [344, 4.0]
    rotation: 0
    state: enabled
- name: spec
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Subdev
    short_id: ''
    type: ''
    value: '""'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [888, 4.0]
    rotation: 0
    state: enabled
- name: stream_args
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Set additional stream args
    short_id: ''
    type: ''
    value: '""'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [176, 92.0]
    rotation: 0
    state: enabled
- name: uhd_usrp_source_0
  id: uhd_usrp_source
  parameters:
    affinity: ''
    alias: ''
    ant0: ant
    ant1: ''
    ant10: ''
    ant11: ''
    ant12: ''
    ant13: ''
    ant14: ''
    ant15: ''
    ant16: ''
    ant17: ''
    ant18: ''
    ant19: ''
    ant2: ''
    ant20: ''
    ant21: ''
    ant22: ''
    ant23: ''
    ant24: ''
    ant25: ''
    ant26: ''
    ant27: ''
    ant28: ''
    ant29: ''
    ant3: ''
    ant30: ''
    ant31: ''
    ant4: ''
    ant5: ''
    ant6: ''
    ant7: ''
    ant8: ''
    ant9: ''
    bw0: samp_rate
    bw1: '0'
    bw10: '0'
    bw11: '0'
    bw12: '0'
    bw13: '0'
    bw14: '0'
    bw15: '0'
    bw16: '0'
    bw17: '0'
    bw18: '0'
    bw19: '0'
    bw2: '0'
    bw20: '0'
    bw21: '0'
    bw22: '0'
    bw23: '0'
    bw24: '0'
    bw25: '0'
    bw26: '0'
    bw27: '0'
    bw28: '0'
    bw29: '0'
    bw3: '0'
    bw30: '0'
    bw31: '0'
    bw4: '0'
    bw5: '0'
    bw6: '0'
    bw7: '0'
    bw8: '0'
    bw9: '0'
    center_freq0: float(freq_c)
    center_freq1: '0'
    center_freq10: '0'
    center_freq11: '0'
    center_freq12: '0'
    center_freq13: '0'
    center_freq14: '0'
    center_freq15: '0'
    center_freq16: '0'
    center_freq17: '0'
    center_freq18: '0'
    center_freq19: '0'
    center_freq2: '0'
    center_freq20: '0'
    center_freq21: '0'
    center_freq22: '0'
    center_freq23: '0'
    center_freq24: '0'
    center_freq25: '0'
    center_freq26: '0'
    center_freq27: '0'
    center_freq28: '0'
    center_freq29: '0'
    center_freq3: '0'
    center_freq30: '0'
    center_freq31: '0'
    center_freq4: '0'
    center_freq5: '0'
    center_freq6: '0'
    center_freq7: '0'
    center_freq8: '0'
    center_freq9: '0'
    clock_rate: '0.0'
    clock_source0: ''
    clock_source1: ''
    clock_source2: ''
    clock_source3: ''
    clock_source4: ''
    clock_source5: ''
    clock_source6: ''
    clock_source7: ''
    comment: ''
    dc_offs_enb0: '""'
    dc_offs_enb1: '""'
    dc_offs_enb10: '""'
    dc_offs_enb11: '""'
    dc_offs_enb12: '""'
    dc_offs_enb13: '""'
    dc_offs_enb14: '""'
    dc_offs_enb15: '""'
    dc_offs_enb16: '""'
    dc_offs_enb17: '""'
    dc_offs_enb18: '""'
    dc_offs_enb19: '""'
    dc_offs_enb2: '""'
    dc_offs_enb20: '""'
    dc_offs_enb21: '""'
    dc_offs_enb22: '""'
    dc_offs_enb23: '""'
    dc_offs_enb24: '""'
    dc_offs_enb25: '""'
    dc_offs_enb26: '""'
    dc_offs_enb27: '""'
    dc_offs_enb28: '""'
    dc_offs_enb29: '""'
    dc_offs_enb3: '""'
    dc_offs_enb30: '""'
    dc_offs_enb31: '""'
    dc_offs_enb4: '""'
    dc_offs_enb5: '""'
    dc_offs_enb6: '""'
    dc_offs_enb7: '""'
    dc_offs_enb8: '""'
    dc_offs_enb9: '""'
    dev_addr: args
    dev_args: '""'
    gain0: gain_
    gain1: '0'
    gain10: '0'
    gain11: '0'
    gain12: '0'
    gain13: '0'
    gain14: '0'
    gain15: '0'
    gain16: '0'
    gain17: '0'
    gain18: '0'
    gain19: '0'
    gain2: '0'
    gain20: '0'
    gain21: '0'
    gain22: '0'
    gain23: '0'
    gain24: '0'
    gain25: '0'
    gain26: '0'
    gain27: '0'
    gain28: '0'
    gain29: '0'
    gain3: '0'
    gain30: '0'
    gain31: '0'
    gain4: '0'
    gain5: '0'
    gain6: '0'
    gain7: '0'
    gain8: '0'
    gain9: '0'
    iq_imbal_enb0: '""'
    iq_imbal_enb1: '""'
    iq_imbal_enb10: '""'
    iq_imbal_enb11: '""'
    iq_imbal_enb12: '""'
    iq_imbal_enb13: '""'
    iq_imbal_enb14: '""'
    iq_imbal_enb15: '""'
    iq_imbal_enb16: '""'
    iq_imbal_enb17: '""'
    iq_imbal_enb18: '""'
    iq_imbal_enb19: '""'
    iq_imbal_enb2: '""'
    iq_imbal_enb20: '""'
    iq_imbal_enb21: '""'
    iq_imbal_enb22: '""'
    iq_imbal_enb23: '""'
    iq_imbal_enb24: '""'
    iq_imbal_enb25: '""'
    iq_imbal_enb26: '""'
    iq_imbal_enb27: '""'
    iq_imbal_enb28: '""'
    iq_imbal_enb29: '""'
    iq_imbal_enb3: '""'
    iq_imbal_enb30: '""'
    iq_imbal_enb31: '""'
    iq_imbal_enb4: '""'
    iq_imbal_enb5: '""'
    iq_imbal_enb6: '""'
    iq_imbal_enb7: '""'
    iq_imbal_enb8: '""'
    iq_imbal_enb9: '""'
    lo_export0: 'False'
    lo_export1: 'False'
    lo_export10: 'False'
    lo_export11: 'False'
    lo_export12: 'False'
    lo_export13: 'False'
    lo_export14: 'False'
    lo_export15: 'False'
    lo_export16: 'False'
    lo_export17: 'False'
    lo_export18: 'False'
    lo_export19: 'False'
    lo_export2: 'False'
    lo_export20: 'False'
    lo_export21: 'False'
    lo_export22: 'False'
    lo_export23: 'False'
    lo_export24: 'False'
    lo_export25: 'False'
    lo_export26: 'False'
    lo_export27: 'False'
    lo_export28: 'False'
    lo_export29: 'False'
    lo_export3: 'False'
    lo_export30: 'False'
    lo_export31: 'False'
    lo_export4: 'False'
    lo_export5: 'False'
    lo_export6: 'False'
    lo_export7: 'False'
    lo_export8: 'False'
    lo_export9: 'False'
    lo_source0: internal
    lo_source1: internal
    lo_source10: internal
    lo_source11: internal
    lo_source12: internal
    lo_source13: internal
    lo_source14: internal
    lo_source15: internal
    lo_source16: internal
    lo_source17: internal
    lo_source18: internal
    lo_source19: internal
    lo_source2: internal
    lo_source20: internal
    lo_source21: internal
    lo_source22: internal
    lo_source23: internal
    lo_source24: internal
    lo_source25: internal
    lo_source26: internal
    lo_source27: internal
    lo_source28: internal
    lo_source29: internal
    lo_source3: internal
    lo_source30: internal
    lo_source31: internal
    lo_source4: internal
    lo_source5: internal
    lo_source6: internal
    lo_source7: internal
    lo_source8: internal
    lo_source9: internal
    maxoutbuf: '0'
    minoutbuf: '0'
    nchan: '1'
    norm_gain0: 'False'
    norm_gain1: 'False'
    norm_gain10: 'False'
    norm_gain11: 'False'
    norm_gain12: 'False'
    norm_gain13: 'False'
    norm_gain14: 'False'
    norm_gain15: 'False'
    norm_gain16: 'False'
    norm_gain17: 'False'
    norm_gain18: 'False'
    norm_gain19: 'False'
    norm_gain2: 'False'
    norm_gain20: 'False'
    norm_gain21: 'False'
    norm_gain22: 'False'
    norm_gain23: 'False'
    norm_gain24: 'False'
    norm_gain25: 'False'
    norm_gain26: 'False'
    norm_gain27: 'False'
    norm_gain28: 'False'
    norm_gain29: 'False'
    norm_gain3: 'False'
    norm_gain30: 'False'
    norm_gain31: 'False'
    norm_gain4: 'False'
    norm_gain5: 'False'
    norm_gain6: 'False'
    norm_gain7: 'False'
    norm_gain8: 'False'
    norm_gain9: 'False'
    num_mboards: '1'
    otw: ''
    rx_agc0: Default
    rx_agc1: Default
    rx_agc10: Default
    rx_agc11: Default
    rx_agc12: Default
    rx_agc13: Default
    rx_agc14: Default
    rx_agc15: Default
    rx_agc16: Default
    rx_agc17: Default
    rx_agc18: Default
    rx_agc19: Default
    rx_agc2: Default
    rx_agc20: Default
    rx_agc21: Default
    rx_agc22: Default
    rx_agc23: Default
    rx_agc24: Default
    rx_agc25: Default
    rx_agc26: Default
    rx_agc27: Default
    rx_agc28: Default
    rx_agc29: Default
    rx_agc3: Default
    rx_agc30: Default
    rx_agc31: Default
    rx_agc4: Default
    rx_agc5: Default
    rx_agc6: Default
    rx_agc7: Default
    rx_agc8: Default
    rx_agc9: Default
    samp_rate: samp_rate_
    sd_spec0: spec
    sd_spec1: ''
    sd_spec2: ''
    sd_spec3: ''
    sd_spec4: ''
    sd_spec5: ''
    sd_spec6: ''
    sd_spec7: ''
    show_lo_controls: 'False'
    stream_args: stream_args
    stream_chans: '[]'
    sync: sync
    time_source0: ''
    time_source1: ''
    time_source2: ''
    time_source3: ''
    time_source4: ''
    time_source5: ''
    time_source6: ''
    time_source7: ''
    type: fc32
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [64, 404.0]
    rotation: 0
    state: enabled
- name: update_rate
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Set GUI widget update rate
    short_id: ''
    type: eng_float
    value: '.1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1104, 108.0]
    rotation: 0
    state: enabled
- name: wire_format
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: Wire format
    short_id: ''
    type: ''
    value: '""'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [984, 4.0]
    rotation: 0
    state: enabled

connections:
- [qtgui_freq_sink_x_0, freq, qtgui_freq_sink_x_0, freq]
- [qtgui_freq_sink_x_0, freq, uhd_usrp_source_0, command]
- [uhd_usrp_source_0, '0', qtgui_freq_sink_x_0, '0']
- [uhd_usrp_source_0, '0', qtgui_time_sink_x_0, '0']
- [uhd_usrp_source_0, '0', qtgui_waterfall_sink_x_0, '0']

metadata:
  file_format: 1
