options:
  parameters:
    author: DJ0ABR
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: 'requires GNU Radio 3.8xxx

      does NOT work with 3.7x'
    copyright: DJ0ABR
    description: requires GNU Radio 3.8xxx
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: no_gui
    hier_block_src_path: '.:'
    id: qpsk_tx
    max_nouts: '0'
    output_language: python
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: run
    sizing_mode: fixed
    thread_safe_setters: ''
    title: 'QPSK TX-Modem '
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: mixf
  id: variable
  parameters:
    comment: 'mid frequency

      in the audio

      spectrum. Set to get

      lowest and highest

      frequency within the

      transceiver filter range.'
    value: '1500'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [360, 12.0]
    rotation: 0
    state: enabled
- name: qpsk__constellation
  id: variable_constellation_rect
  parameters:
    comment: 'alternative:

      [0.707+0.707j, -0.707+0.707j, -0.707-0.707j, 0.707-0.707j]

      does not make a difference'
    const_points: '[1+1j, -1+1j, -1-1j, 1-1j]'
    imag_sect: '2'
    precision: '8'
    real_sect: '2'
    rot_sym: '4'
    soft_dec_lut: None
    sym_map: '[0, 1, 2, 3]'
    w_imag_sect: '1'
    w_real_sect: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 196.0]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_0_0_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '1'
    comment: 'the modulator output is in the baseband at 0 Hz.

      Mix it with the required audio mid frequency.

      cos and -sin are used to combine I and Q

      into the final signal.'
    freq: mixf
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    type: complex
    waveform: analog.GR_COS_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [96, 476.0]
    rotation: 0
    state: enabled
- name: audio_sink_0_0
  id: audio_sink
  parameters:
    affinity: ''
    alias: ''
    comment: 'send audio to

      transceiver'
    device_name: ''
    num_inputs: '1'
    ok_to_block: 'True'
    samp_rate: samp_rate
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [928, 356.0]
    rotation: 0
    state: enabled
- name: blocks_add_xx_0
  id: blocks_add_xx
  parameters:
    affinity: ''
    alias: ''
    comment: 'generate the analog

      output signal: USB

      (for LSB use substraction)'
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [696, 376.0]
    rotation: 0
    state: true
- name: blocks_complex_to_float_1
  id: blocks_complex_to_float
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [512, 376.0]
    rotation: 0
    state: enabled
- name: blocks_multiply_const_vxx_0
  id: blocks_multiply_const_vxx
  parameters:
    affinity: ''
    alias: ''
    comment: 'reduce level for the

      audio output, improves

      linearity'
    const: '0.05'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [784, 356.0]
    rotation: 0
    state: true
- name: blocks_multiply_xx_0_0
  id: blocks_multiply_xx
  parameters:
    affinity: ''
    alias: ''
    comment: "mix I und Q \nto the mid \nfrequency\nspecified in\n\"mixf\""
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [400, 376.0]
    rotation: 0
    state: enabled
- name: blocks_udp_source_0
  id: blocks_udp_source
  parameters:
    affinity: ''
    alias: ''
    comment: "receive an UDP data stream\nwith the bitrate of (see \ncomment samp_rate)\n\
      The stream is buffered, \nso send some bytes ahead\nto prefill the buffer\n\
      and avoid underrun"
    eof: 'False'
    ipaddr: 127.0.0.1
    maxoutbuf: '0'
    minoutbuf: '0'
    port: '40134'
    psize: '258'
    type: byte
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [824, 148.0]
    rotation: 180
    state: enabled
- name: digital_constellation_modulator_0
  id: digital_constellation_modulator
  parameters:
    affinity: ''
    alias: ''
    comment: 'unpack bytes to bits

      make symbols 2bits/sym

      make constellation'
    constellation: qpsk__constellation
    differential: 'False'
    excess_bw: '0.35'
    log: 'False'
    maxoutbuf: '0'
    minoutbuf: '0'
    samples_per_symbol: resamprate
    verbose: 'False'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [392, 180.0]
    rotation: 180
    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: 'False'
    fc: '0'
    fftsize: '1024'
    freqhalf: 'False'
    grid: 'True'
    gui_hint: ''
    label: Relative Gain
    label1: ''
    label10: ''''''
    label2: ''''''
    label3: ''''''
    label4: ''''''
    label5: ''''''
    label6: ''''''
    label7: ''''''
    label8: ''''''
    label9: ''''''
    legend: 'True'
    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: float
    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: firdes.WIN_BLACKMAN_hARRIS
    ymax: '10'
    ymin: '-140'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [880, 576.0]
    rotation: 0
    state: disabled
- name: resamprate
  id: parameter
  parameters:
    alias: ''
    comment: ''
    hide: none
    label: resamprate
    short_id: r
    type: intx
    value: '20'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [776, 12.0]
    rotation: 0
    state: true
- name: samp_rate
  id: parameter
  parameters:
    alias: ''
    comment: Audio Rate
    hide: none
    label: samp_rate
    short_id: s
    type: intx
    value: '44100'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [208, 12.0]
    rotation: 0
    state: true

connections:
- [analog_sig_source_x_0_0_0, '0', blocks_multiply_xx_0_0, '1']
- [blocks_add_xx_0, '0', blocks_multiply_const_vxx_0, '0']
- [blocks_add_xx_0, '0', qtgui_freq_sink_x_0, '0']
- [blocks_complex_to_float_1, '0', blocks_add_xx_0, '0']
- [blocks_complex_to_float_1, '1', blocks_add_xx_0, '1']
- [blocks_multiply_const_vxx_0, '0', audio_sink_0_0, '0']
- [blocks_multiply_xx_0_0, '0', blocks_complex_to_float_1, '0']
- [blocks_udp_source_0, '0', digital_constellation_modulator_0, '0']
- [digital_constellation_modulator_0, '0', blocks_multiply_xx_0_0, '0']

metadata:
  file_format: 1