options:
  parameters:
    author: Barry Duggan
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: NBFM transmitter
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: NFM_xmt
    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: NFM_xmt
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [16, 12.0]
    rotation: 0
    state: enabled

blocks:
- name: if_rate
  id: variable
  parameters:
    comment: ''
    value: int(usrp_rate/3)
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [16, 124.0]
    rotation: 0
    state: true
- name: pl_freq
  id: variable_qtgui_chooser
  parameters:
    comment: ''
    gui_hint: ''
    label: PL Tone
    label0: '0'
    label1: '1'
    label2: '2'
    label3: ''
    label4: ''
    labels: '["0.0", "67.0", "71.9", "74.4", "77.0", "79.7", "82.5", "85.4", "88.5",
      "91.5", "94.8", "97.4", "100.0", "103.5", "107.2", "110.9", "114.8", "118.8",
      "123.0", "127.3", "131.8", "136.5", "141.3", "146.2", "151.4", "156.7", "162.2",
      "167.9", "173.8", "179.9", "186.2", "192.8", "203.5", "210.7", "218.1", "225.7",
      "233.6", "241.8", "250.3"]'
    num_opts: '0'
    option0: '0'
    option1: '1'
    option2: '2'
    option3: '3'
    option4: '4'
    options: '[0.0, 67.0, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4, 88.5, 91.5, 94.8, 97.4,
      100.0, 103.5, 107.2, 110.9, 114.8, 118.8, 123.0, 127.3, 131.8, 136.5, 141.3,
      146.2, 151.4, 156.7, 162.2, 167.9, 173.8, 179.9, 186.2, 192.8, 203.5, 210.7,
      218.1, 225.7, 233.6, 241.8, 250.3]'
    orient: Qt.QVBoxLayout
    type: real
    value: '0.0'
    widget: combo_box
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [720, 12.0]
    rotation: 0
    state: true
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: '48000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [200, 12.0]
    rotation: 0
    state: enabled
- name: usrp_rate
  id: variable
  parameters:
    comment: ''
    value: '576000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [200, 76.0]
    rotation: 0
    state: true
- name: volume
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: ''
    label: Audio gain
    min_len: '200'
    orient: Qt.Horizontal
    rangeType: float
    start: '0'
    step: '0.1'
    stop: '10.0'
    value: '5.0'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [288, 12.0]
    rotation: 0
    state: enabled
- name: analog_nbfm_tx_0
  id: analog_nbfm_tx
  parameters:
    affinity: ''
    alias: ''
    audio_rate: samp_rate
    comment: ''
    fh: '-1.0'
    max_dev: 5e3
    maxoutbuf: '0'
    minoutbuf: '0'
    quad_rate: if_rate
    tau: 75e-6
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [776, 148.0]
    rotation: 0
    state: true
- name: analog_sig_source_x_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '0.15'
    comment: PL tone gen
    freq: pl_freq
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    type: float
    waveform: analog.GR_SIN_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [456, 44.0]
    rotation: 0
    state: true
- name: audio_source_0
  id: audio_source
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    device_name: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_outputs: '1'
    ok_to_block: 'False'
    samp_rate: '48000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [64, 196.0]
    rotation: 0
    state: enabled
- name: band_pass_filter_0
  id: band_pass_filter
  parameters:
    affinity: ''
    alias: ''
    beta: '6.76'
    comment: ''
    decim: '1'
    gain: '1'
    high_cutoff_freq: '5000'
    interp: '1'
    low_cutoff_freq: '300'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_rate: samp_rate
    type: fir_filter_fff
    width: '200'
    win: firdes.WIN_HAMMING
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [264, 140.0]
    rotation: 0
    state: true
- name: blocks_add_xx_0
  id: blocks_add_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [672, 168.0]
    rotation: 0
    state: true
- name: blocks_multiply_const_vxx_0
  id: blocks_multiply_const_vxx
  parameters:
    affinity: ''
    alias: ''
    comment: Audio gain
    const: volume
    maxoutbuf: '0'
    minoutbuf: '0'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [456, 196.0]
    rotation: 0
    state: enabled
- name: blocks_repeat_0_0
  id: blocks_repeat
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    interp: (int)(usrp_rate/if_rate)
    maxoutbuf: '0'
    minoutbuf: '0'
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [400, 356.0]
    rotation: 0
    state: true
- name: low_pass_filter_0
  id: low_pass_filter
  parameters:
    affinity: ''
    alias: ''
    beta: '6.76'
    comment: ''
    cutoff_freq: '5000'
    decim: '1'
    gain: '1'
    interp: '1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_rate: if_rate
    type: fir_filter_ccf
    width: '2000'
    win: firdes.WIN_HAMMING
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [192, 308.0]
    rotation: 0
    state: true
- name: qtgui_sink_x_0
  id: qtgui_sink_x
  parameters:
    affinity: ''
    alias: ''
    bw: if_rate
    comment: ''
    fc: '0'
    fftsize: '1024'
    gui_hint: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    name: '""'
    plotconst: 'True'
    plotfreq: 'True'
    plottime: 'True'
    plotwaterfall: 'True'
    rate: '10'
    showports: 'False'
    showrf: 'True'
    type: complex
    wintype: firdes.WIN_BLACKMAN_hARRIS
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [400, 428.0]
    rotation: 0
    state: true
- name: virtual_sink_0
  id: virtual_sink
  parameters:
    alias: ''
    comment: ''
    stream_id: tag1
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1040, 180.0]
    rotation: 0
    state: true
- name: virtual_source_0
  id: virtual_source
  parameters:
    alias: ''
    comment: ''
    stream_id: tag1
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [32, 356.0]
    rotation: 0
    state: true
- name: zeromq_pub_sink_0
  id: zeromq_pub_sink
  parameters:
    address: tcp://127.0.0.1:49203
    affinity: ''
    alias: ''
    comment: USRP sample rate = 576kHz
    hwm: '-1'
    pass_tags: 'False'
    timeout: '100'
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [592, 340.0]
    rotation: 0
    state: true

connections:
- [analog_nbfm_tx_0, '0', virtual_sink_0, '0']
- [analog_sig_source_x_0, '0', blocks_add_xx_0, '0']
- [audio_source_0, '0', band_pass_filter_0, '0']
- [band_pass_filter_0, '0', blocks_multiply_const_vxx_0, '0']
- [blocks_add_xx_0, '0', analog_nbfm_tx_0, '0']
- [blocks_multiply_const_vxx_0, '0', blocks_add_xx_0, '1']
- [blocks_repeat_0_0, '0', zeromq_pub_sink_0, '0']
- [low_pass_filter_0, '0', blocks_repeat_0_0, '0']
- [low_pass_filter_0, '0', qtgui_sink_x_0, '0']
- [virtual_source_0, '0', low_pass_filter_0, '0']

metadata:
  file_format: 1