GNU Radio World

Tag Propagation Demo

Adapted from GNU Radio's own example (gr-blocks/examples/tags/test_tag_prop.grc).

Press Load to open this flowgraph in an editor embedded above, then ▶ to run it. Nothing is downloaded until you do.

Open in the full editor ▶ Download the .grc

Blocks used

BlockModuleUsed
QT GUI Time SinkGNU Radio2
Vector SourceGNU Radio2
Tag ObjectGNU Radio1
Test Tag Variable RateGNU Radio1
ThrottleGNU Radio1
VariableGNU Radio1

Flowgraph source

blocks/tag_propagation.grc
options:
  parameters:
    author: ''
    catch_exceptions: 'True'
    category: Custom
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: Adapted from GNU Radio's own example (gr-blocks/examples/tags/test_tag_prop.grc).
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: test_tag_prop
    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: Tag Propagation Demo
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 10]
    rotation: 0
    state: enabled
blocks:
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: '8000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [590, 10]
    rotation: 0
    state: enabled
- name: tag0
  id: variable_tag_object
  parameters:
    comment: ''
    key: pmt.intern("mark")
    offset: '0'
    src: pmt.intern("src")
    value: pmt.PMT_T
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [760, 10]
    rotation: 0
    state: enabled
- name: blocks_test_tag_variable_rate_ff_0
  id: blocks_test_tag_variable_rate_ff
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    once: 'False'
    step: '0.001'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [700, 210]
    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: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [370, 190]
    rotation: 0
    state: enabled
- name: blocks_vector_source_x_0_0
  id: blocks_vector_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    repeat: 'True'
    tags: '[tag0, ]'
    type: float
    vector: numpy.arange(-1, 1, 0.01)
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 200]
    rotation: 0
    state: disabled
- name: blocks_vector_source_x_0_0_0
  id: blocks_vector_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    repeat: 'True'
    tags: '[tag0, ]'
    type: float
    vector: numpy.arange(-1, 1, 0.1)
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 320]
    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: 0,0,1,1
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'False'
    marker1: '0'
    marker10: '-1'
    marker2: '-1'
    marker3: '-1'
    marker4: '-1'
    marker5: '-1'
    marker6: '-1'
    marker7: '-1'
    marker8: '-1'
    marker9: '-1'
    name: '""'
    nconnections: '1'
    size: '500'
    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: float
    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: '1.5'
    ymin: '-1.5'
    yunit: '""'
    samp_rate: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1050, 190]
    rotation: 0
    state: enabled
- name: qtgui_time_sink_x_0_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: 1,0,1,1
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'False'
    marker1: '0'
    marker10: '-1'
    marker2: '-1'
    marker3: '-1'
    marker4: '-1'
    marker5: '-1'
    marker6: '-1'
    marker7: '-1'
    marker8: '-1'
    marker9: '-1'
    name: '""'
    nconnections: '1'
    size: '500'
    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: float
    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: '1.5'
    ymin: '-1.5'
    yunit: '""'
    samp_rate: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [700, 310]
    rotation: 0
    state: enabled
connections:
- [blocks_test_tag_variable_rate_ff_0, '0', qtgui_time_sink_x_0, '0']
- [blocks_throttle2_0, '0', blocks_test_tag_variable_rate_ff_0, '0']
- [blocks_throttle2_0, '0', qtgui_time_sink_x_0_0, '0']
- [blocks_vector_source_x_0_0, '0', blocks_throttle2_0, '0']
- [blocks_vector_source_x_0_0_0, '0', blocks_throttle2_0, '0']
metadata:
  file_format: 1
  grc_version: 3.10.10.0