Spectrum Analyzer Demo

Adapted from GNU Radio's own example (gr-channels/examples/demo_spec_an.grc).
Author mettus
Category Channel Models
Blocks 17
Connections 12
File channels/spectrum_analyzer.grc
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Blocks used

Block	Module	Used
QT GUI Number Sink	`GNU Radio`	3
QT GUI Range	`GNU Radio`	2
RMS	`GNU Radio`	2
Variable	`GNU Radio`	2
Add	`GNU Radio`	1
Divide	`GNU Radio`	1
Log10	`GNU Radio`	1
Noise Source	`GNU Radio`	1
QT GUI Frequency Sink	`GNU Radio`	1
QT GUI Time Sink	`GNU Radio`	1
Signal Source	`GNU Radio`	1
Throttle	`GNU Radio`	1
Flowgraph source

channels/spectrum_analyzer.grc
options:
  parameters:
    author: mettus
    catch_exceptions: 'True'
    category: Custom
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: Adapted from GNU Radio's own example (gr-channels/examples/demo_spec_an.grc).
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: demo_spec_an
    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: Spectrum Analyzer Demo
    window_size: 1280, 1024
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 10]
    rotation: 0
    state: enabled
blocks:
- name: fft_size
  id: variable
  parameters:
    comment: ''
    value: '1000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [610, 10]
    rotation: 0
    state: enabled
- name: freq_offset
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: ''
    label: Tone Frequency
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '2100'
    step: '10'
    stop: '3100'
    value: '2600'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [780, 10]
    rotation: 0
    state: enabled
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: '100000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1030, 10]
    rotation: 0
    state: enabled
- name: snr
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: ''
    label: Noise Amplitude
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '0'
    step: '0.01'
    stop: '1'
    value: '0.1'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1200, 10]
    rotation: 0
    state: enabled
- name: analog_noise_source_x_0
  id: analog_noise_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    noise_type: analog.GR_GAUSSIAN
    seed: '42'
    type: complex
    amplitude: snr
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 420]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    showports: 'False'
    type: complex
    waveform: analog.GR_COS_WAVE
    frequency: freq_offset
    amplitude: '1.0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 280]
    rotation: 0
    state: enabled
- name: blocks_add_xx_0
  id: blocks_add_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
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    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [310, 520]
    rotation: 0
    state: enabled
- name: blocks_divide_xx_0
  id: blocks_divide_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: [560, 300]
    rotation: 0
    state: enabled
- name: blocks_nlog10_ff_0
  id: blocks_nlog10_ff
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    k: '0'
    maxoutbuf: '0'
    minoutbuf: '0'
    n: '20'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [930, 310]
    rotation: 0
    state: enabled
- name: blocks_rms_xx_0
  id: blocks_rms_xx
  parameters:
    affinity: ''
    alias: ''
    alpha: '.0001'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    type: complex
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [310, 420]
    rotation: 0
    state: enabled
- name: blocks_rms_xx_0_0
  id: blocks_rms_xx
  parameters:
    affinity: ''
    alias: ''
    alpha: '.0001'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    type: complex
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [310, 300]
    rotation: 0
    state: enabled
- name: blocks_throttle2_0
  id: blocks_throttle2
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    ignoretag: 'True'
    limit: auto
    maximum: '0.1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samples_per_second: samp_rate
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [560, 510]
    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: 'True'
    average: '1.0'
    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: 'False'
    fc: '0'
    fftsize: '1024'
    freqhalf: 'True'
    grid: 'False'
    gui_hint: ''
    label: Relative Gain
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: FFT Plot
    nconnections: '1'
    norm_window: 'False'
    showports: 'True'
    tr_chan: '0'
    tr_level: '0.0'
    tr_mode: qtgui.TRIG_MODE_FREE
    tr_tag: '""'
    type: complex
    units: dB
    update_time: '0.10'
    width1: '1'
    width10: '1'
    width2: '1'
    width3: '1'
    width4: '1'
    width5: '1'
    width6: '1'
    width7: '1'
    width8: '1'
    width9: '1'
    wintype: window.WIN_FLATTOP
    ymax: '10'
    ymin: '-140'
    samp_rate: '1.0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [930, 500]
    rotation: 0
    state: enabled
- name: qtgui_number_sink_0
  id: qtgui_number_sink
  parameters:
    affinity: ''
    alias: ''
    autoscale: 'False'
    avg: '0'
    color1: ("black", "black")
    color10: ("black", "black")
    color2: ("black", "black")
    color3: ("black", "black")
    color4: ("black", "black")
    color5: ("black", "black")
    color6: ("black", "black")
    color7: ("black", "black")
    color8: ("black", "black")
    color9: ("black", "black")
    comment: ''
    factor1: '1'
    factor10: '1'
    factor2: '1'
    factor3: '1'
    factor4: '1'
    factor5: '1'
    factor6: '1'
    factor7: '1'
    factor8: '1'
    factor9: '1'
    graph_type: qtgui.NUM_GRAPH_HORIZ
    gui_hint: ''
    label1: Noise Amplitude
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    max: '100'
    min: '0'
    name: '""'
    nconnections: '1'
    type: float
    unit1: ''
    unit10: ''
    unit2: ''
    unit3: ''
    unit4: ''
    unit5: ''
    unit6: ''
    unit7: ''
    unit8: ''
    unit9: ''
    update_time: '0.10'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [560, 650]
    rotation: 0
    state: enabled
- name: qtgui_number_sink_signal_amplitude
  id: qtgui_number_sink
  parameters:
    affinity: ''
    alias: ''
    autoscale: 'False'
    avg: '0'
    color1: ("black", "black")
    color10: ("black", "black")
    color2: ("black", "black")
    color3: ("black", "black")
    color4: ("black", "black")
    color5: ("black", "black")
    color6: ("black", "black")
    color7: ("black", "black")
    color8: ("black", "black")
    color9: ("black", "black")
    comment: ''
    factor1: '1'
    factor10: '1'
    factor2: '1'
    factor3: '1'
    factor4: '1'
    factor5: '1'
    factor6: '1'
    factor7: '1'
    factor8: '1'
    factor9: '1'
    graph_type: qtgui.NUM_GRAPH_HORIZ
    gui_hint: ''
    label1: Signal Amplitude
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    max: '2'
    min: '0'
    name: '""'
    nconnections: '1'
    type: float
    unit1: ''
    unit10: ''
    unit2: ''
    unit3: ''
    unit4: ''
    unit5: ''
    unit6: ''
    unit7: ''
    unit8: ''
    unit9: ''
    update_time: '0.10'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [560, 810]
    rotation: 0
    state: enabled
- name: qtgui_number_sink_snr
  id: qtgui_number_sink
  parameters:
    affinity: ''
    alias: ''
    autoscale: 'True'
    avg: '0'
    color1: ("black", "black")
    color10: ("black", "black")
    color2: ("black", "black")
    color3: ("black", "black")
    color4: ("black", "black")
    color5: ("black", "black")
    color6: ("black", "black")
    color7: ("black", "black")
    color8: ("black", "black")
    color9: ("black", "black")
    comment: ''
    factor1: '1'
    factor10: '1'
    factor2: '1'
    factor3: '1'
    factor4: '1'
    factor5: '1'
    factor6: '1'
    factor7: '1'
    factor8: '1'
    factor9: '1'
    graph_type: qtgui.NUM_GRAPH_HORIZ
    gui_hint: ''
    label1: SNR
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    max: '1'
    min: '-1'
    name: '""'
    nconnections: '1'
    type: float
    unit1: ''
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    unit3: ''
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    unit5: ''
    unit6: ''
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    unit8: ''
    unit9: ''
    update_time: '0.10'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1280, 280]
    rotation: 0
    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: 'False'
    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: 'False'
    entags: 'True'
    grid: 'False'
    gui_hint: ''
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'True'
    marker1: '-1'
    marker10: '-1'
    marker2: '-1'
    marker3: '-1'
    marker4: '-1'
    marker5: '-1'
    marker6: '-1'
    marker7: '-1'
    marker8: '-1'
    marker9: '-1'
    name: Scope Plot
    nconnections: '1'
    size: '1024'
    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: '0.10'
    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: '""'
    samp_rate: samp_rate
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1480, 10]
    rotation: 0
    state: disabled
connections:
- [analog_noise_source_x_0, '0', blocks_add_xx_0, '1']
- [analog_noise_source_x_0, '0', blocks_rms_xx_0, '0']
- [analog_sig_source_x_0, '0', blocks_add_xx_0, '0']
- [analog_sig_source_x_0, '0', blocks_rms_xx_0_0, '0']
- [blocks_add_xx_0, '0', blocks_throttle2_0, '0']
- [blocks_divide_xx_0, '0', blocks_nlog10_ff_0, '0']
- [blocks_nlog10_ff_0, '0', qtgui_number_sink_snr, '0']
- [blocks_rms_xx_0, '0', blocks_divide_xx_0, '1']
- [blocks_rms_xx_0, '0', qtgui_number_sink_0, '0']
- [blocks_rms_xx_0_0, '0', blocks_divide_xx_0, '0']
- [blocks_rms_xx_0_0, '0', qtgui_number_sink_signal_amplitude, '0']
- [blocks_throttle2_0, '0', qtgui_freq_sink_x_0, '0']
metadata:
  file_format: 1
  grc_version: 3.10.10.0