Hi,

yes, I just attach a grc file for GR 3.9 that I use to test things.

It works if I specify `addr=...` or `addr0=...` with one device. If I switch to 2 devices `addr=....,addr1=...` it fails.

It seems like UHD tries to initialize the devices twice.

----
[INFO] [UHD] linux; GNU C++ version 9.3.0; Boost_107100; UHD_3.15.0.0-62-g7a3f1516 [INFO] [MPMD] Initializing 2 device(s) in parallel with args: mgmt_addr0=192.168.20.213,type0=n3xx,product0=n310,serial0=319841B,claimed0=False,mgmt_addr1=192.168.21.218,type1=n3xx,product1=n310,serial1=3180AF3,claimed1=False,addr0=192.168.20.213,addr1=192.168.21.218,master_clock_rate=122.88e6,clock_source=external,time_source=external [INFO] [MPM.PeriphManager] init() called with device args `time_source=external,clock_source=external,master_clock_rate=122.88e6,product=n310,mgmt_addr=192.168.20.213'.
[INFO] [0/Replay_0] Initializing block control (NOC ID: 0x4E91A00000000004)
[INFO] [MPM.PeriphManager] init() called with device args `time_source=external,product=n310,master_clock_rate=122.88e6,clock_source=external,mgmt_addr=192.168.21.218'.
[INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000011312)

[...]

[INFO] [1/FIFO_3] Initializing block control (NOC ID: 0xF1F0000000000000)
[INFO] [MULTI_USRP]     1) catch time transition at pps edge
[INFO] [MULTI_USRP]     2) set times next pps (synchronously)
[INFO] [MPMD] Initializing 2 device(s) in parallel with args: mgmt_addr0=192.168.20.213,type0=n3xx,product0=n310,serial0=319841B,claimed0=True,mgmt_addr1=192.168.21.218,type1=n3xx,product1=n310,serial1=3180AF3,claimed1=True,addr0=192.168.20.213,addr1=192.168.21.218,master_clock_rate=122.88e6,clock_source=external,time_source=external
[ERROR] [RPC] Someone tried to claim this device again (From: 192.168.20.34)
----

If I use only one device, it looks like this:

----
[INFO] [UHD] linux; GNU C++ version 9.3.0; Boost_107100; UHD_3.15.0.0-62-g7a3f1516 [INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=192.168.20.213,type=n3xx,product=n310,serial=319841B,claimed=False,addr0=192.168.20.213,master_clock_rate=122.88e6,clock_source=external,time_source=external [INFO] [MPM.PeriphManager] init() called with device args `time_source=external,clock_source=external,master_clock_rate=122.88e6,product=n310,mgmt_addr=192.168.20.213'.
[INFO] [0/Replay_0] Initializing block control (NOC ID: 0x4E91A00000000004)

[...]

[INFO] [0/FIFO_3] Initializing block control (NOC ID: 0xF1F0000000000000)
[INFO] [MULTI_USRP]     1) catch time transition at pps edge
[INFO] [MULTI_USRP]     2) set times next pps (synchronously)
[INFO] [MULTI_USRP]     1) catch time transition at pps edge
[INFO] [MULTI_USRP]     2) set times next pps (synchronously)
----

The last 4 lines are suspicious because they indicate that synchronization is performed twice. Also, most of the time during start up is spend there.

Anyways, I attached my MWE flowgraph. I'd be happy if you could tell me how to fix my issue.

Cheers
Johannes

On 10.02.21 22:52, Marcus D Leech wrote:
What happens if you just use a single N310 for both TX and RX?

Just trying to figure out where the problem might be. Also please share a 
minimal flow graph that shows the problem.

Sent from my iPhone

On Feb 10, 2021, at 1:25 PM, Johannes Demel <[email protected]> wrote:

Hi all,

I have a flowgraph where I want to use two N310s for TX and RX.

If I run `benchmark_rate`, everything works fine.

```
./benchmark_rate --pps external --ref external --rx_channels "0,4" --tx_channels 
"2,6" --rx_rate 61.44e6 --tx_rate 61.44e6 
--args="addr0=192.168.21.218,addr1=192.168.20.213,master_clock_rate=122.88e6
```

It's important that I use one RX and one TX channel each on those USRPs.

But it seems like I can't do that with

```
[INFO] [UHD] linux; GNU C++ version 9.3.0; Boost_107100; 
UHD_3.15.0.0-62-g7a3f1516
[INFO] [MPMD] Initializing 2 device(s) in parallel with args: 
mgmt_addr0=192.168.20.213,type0=n3xx,product0=n310,serial0=319841B,claimed0=False,mgmt_addr1=192.168.21.218,type1=n3xx,product1=n310,serial1=3180AF3,claimed1=False,addr0=192.168.20.213,addr1=192.168.21.218,master_clock_rate=122.88e6,clock_source=external,time_source=external
[INFO] [MPM.PeriphManager] init() called with device args 
`time_source=external,clock_source=external,master_clock_rate=122.88e6,product=n310,mgmt_addr=192.168.20.213'.
[INFO] [0/Replay_0] Initializing block control (NOC ID: 0x4E91A00000000004)
[INFO] [MPM.PeriphManager] init() called with device args 
`time_source=external,product=n310,master_clock_rate=122.88e6,clock_source=external,mgmt_addr=192.168.21.218'.

[...]

[INFO] [MULTI_USRP]     1) catch time transition at pps edge
[INFO] [MULTI_USRP]     2) set times next pps (synchronously)
[INFO] [MPMD] Initializing 1 device(s) in parallel with args: 
mgmt_addr=192.168.21.218,type=n3xx,product=n310,serial=3180AF3,claimed=True,addr=192.168.21.218,master_clock_rate=122.88e6,clock_source=external,time_source=external
[ERROR] [RPC] Someone tried to claim this device again (From: 192.168.21.34)
[WARNING] [MPM.RPCServer] Someone tried to claim this device again (From: 
192.168.21.34)
Traceback (most recent call last):
  File "gr-tacmac/examples/usrp_multi_test.py", line 360, in <module>
    main()
  File "gr-tacmac/examples/usrp_multi_test.py", line 338, in main
    tb = top_block_cls()
  File "gr-tacmac/examples/usrp_multi_test.py", line 133, in __init__
    self.uhd_usrp_sink_0 = uhd.usrp_sink(
RuntimeError: RuntimeError: Error during RPC call to `claim'. Error message: 
Someone tried to claim this device again (From: 192.168.21.34)
```

I can share the example flowgraph. It's just a USRP source connected to a Qt 
time sink (and a Qt Freq sink). And a USRP sink that's fed by two Signal 
sources.

It works if I only have either a USRP sink or USRP source. But in case I try to 
use both. The configuration breaks with the above error. How do I fix this?

Cheers
Johannes

options:
  parameters:
    author: Johannes Demel
    catch_exceptions: 'True'
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: ''
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: multi_usrp_test
    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: Multiple USRP test
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: device_addr
  id: variable
  parameters:
    comment: ''
    value: '"addr0=192.168.20.213,addr1=192.168.21.218"'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [96, 100]
    rotation: 0
    state: disabled
- name: device_addr
  id: variable
  parameters:
    comment: ''
    value: '"addr0=192.168.20.213"'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [309, 214]
    rotation: 0
    state: enabled
- name: device_args
  id: variable
  parameters:
    comment: ''
    value: 
'"master_clock_rate=122.88e6,clock_source=external,time_source=external"'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [98, 163]
    rotation: 0
    state: enabled
- name: freq
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: 2,0,1,1
    label: Carrier Frequency
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: 2.4e9
    step: '1'
    stop: 3.8e9
    value: 3.75e9
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [431, 13]
    rotation: 0
    state: enabled
- name: rgain
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: 3,0,1,1
    label: RX gain
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '0'
    step: '1'
    stop: '75'
    value: '55'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [580, 13]
    rotation: 0
    state: enabled
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: 30.72e6
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [184, 12]
    rotation: 0
    state: enabled
- name: tgain
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: 4,0,1,1
    label: TX gain
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '0'
    step: '1'
    stop: '75'
    value: '55'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [711, 12]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '.7'
    comment: ''
    freq: 1.e6
    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: [674, 362]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_0_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '.7'
    comment: ''
    freq: 4.e6
    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: [678, 491]
    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: '1.0'
    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: freq
    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: '""'
    nconnections: '2'
    norm_window: 'False'
    showports: 'False'
    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_BLACKMAN_hARRIS
    ymax: '10'
    ymin: '-140'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [367, 412]
    rotation: 0
    state: enabled
- name: qtgui_time_sink_synced_stream
  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: 'True'
    gui_hint: 0, 0, 2,3
    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: '"synchronization"'
    nconnections: '2'
    size: int(samp_rate / 500) * 2
    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: 30e-6
    tr_level: '0.05'
    tr_mode: qtgui.TRIG_MODE_FREE
    tr_slope: qtgui.TRIG_SLOPE_POS
    tr_tag: '"frame_start"'
    type: complex
    update_time: '0.4'
    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: [487, 630]
    rotation: 0
    state: disabled
- name: uhd_usrp_sink_1
  id: uhd_usrp_sink
  parameters:
    affinity: ''
    alias: ''
    ant0: '"TX/RX"'
    ant1: '"TX/RX"'
    ant10: '"TX/RX"'
    ant11: '"TX/RX"'
    ant12: '"TX/RX"'
    ant13: '"TX/RX"'
    ant14: '"TX/RX"'
    ant15: '"TX/RX"'
    ant16: '"TX/RX"'
    ant17: '"TX/RX"'
    ant18: '"TX/RX"'
    ant19: '"TX/RX"'
    ant2: '"TX/RX"'
    ant20: '"TX/RX"'
    ant21: '"TX/RX"'
    ant22: '"TX/RX"'
    ant23: '"TX/RX"'
    ant24: '"TX/RX"'
    ant25: '"TX/RX"'
    ant26: '"TX/RX"'
    ant27: '"TX/RX"'
    ant28: '"TX/RX"'
    ant29: '"TX/RX"'
    ant3: '"TX/RX"'
    ant30: '"TX/RX"'
    ant31: '"TX/RX"'
    ant4: '"TX/RX"'
    ant5: '"TX/RX"'
    ant6: '"TX/RX"'
    ant7: '"TX/RX"'
    ant8: '"TX/RX"'
    ant9: '"TX/RX"'
    bw0: '0'
    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: freq
    center_freq1: freq
    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: 122.88e6
    clock_source0: external
    clock_source1: ''
    clock_source2: ''
    clock_source3: ''
    clock_source4: ''
    clock_source5: ''
    clock_source6: ''
    clock_source7: ''
    comment: ''
    dev_addr: device_addr
    dev_args: device_args
    gain0: tgain
    gain1: tgain
    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'
    gain_type0: default
    gain_type1: default
    gain_type10: default
    gain_type11: default
    gain_type12: default
    gain_type13: default
    gain_type14: default
    gain_type15: default
    gain_type16: default
    gain_type17: default
    gain_type18: default
    gain_type19: default
    gain_type2: default
    gain_type20: default
    gain_type21: default
    gain_type22: default
    gain_type23: default
    gain_type24: default
    gain_type25: default
    gain_type26: default
    gain_type27: default
    gain_type28: default
    gain_type29: default
    gain_type3: default
    gain_type30: default
    gain_type31: default
    gain_type4: default
    gain_type5: default
    gain_type6: default
    gain_type7: default
    gain_type8: default
    gain_type9: default
    len_tag_name: '""'
    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: '2'
    num_mboards: '1'
    otw: ''
    samp_rate: samp_rate
    sd_spec0: ''
    sd_spec1: ''
    sd_spec2: ''
    sd_spec3: ''
    sd_spec4: ''
    sd_spec5: ''
    sd_spec6: ''
    sd_spec7: ''
    show_lo_controls: 'False'
    stream_args: ''
    stream_chans: '[2,3]'
    sync: sync
    time_source0: external
    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: [1040, 300]
    rotation: 0
    state: enabled
- name: uhd_usrp_source_1
  id: uhd_usrp_source
  parameters:
    affinity: ''
    alias: ''
    ant0: '"RX2"'
    ant1: '"RX2"'
    ant10: '"RX2"'
    ant11: '"RX2"'
    ant12: '"RX2"'
    ant13: '"RX2"'
    ant14: '"RX2"'
    ant15: '"RX2"'
    ant16: '"RX2"'
    ant17: '"RX2"'
    ant18: '"RX2"'
    ant19: '"RX2"'
    ant2: '"RX2"'
    ant20: '"RX2"'
    ant21: '"RX2"'
    ant22: '"RX2"'
    ant23: '"RX2"'
    ant24: '"RX2"'
    ant25: '"RX2"'
    ant26: '"RX2"'
    ant27: '"RX2"'
    ant28: '"RX2"'
    ant29: '"RX2"'
    ant3: '"RX2"'
    ant30: '"RX2"'
    ant31: '"RX2"'
    ant4: '"RX2"'
    ant5: '"RX2"'
    ant6: '"RX2"'
    ant7: '"RX2"'
    ant8: '"RX2"'
    ant9: '"RX2"'
    bw0: '0'
    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: freq
    center_freq1: freq
    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: 122.88e6
    clock_source0: external
    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: device_addr
    dev_args: device_args
    gain0: rgain
    gain1: rgain
    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'
    gain_type0: default
    gain_type1: default
    gain_type10: default
    gain_type11: default
    gain_type12: default
    gain_type13: default
    gain_type14: default
    gain_type15: default
    gain_type16: default
    gain_type17: default
    gain_type18: default
    gain_type19: default
    gain_type2: default
    gain_type20: default
    gain_type21: default
    gain_type22: default
    gain_type23: default
    gain_type24: default
    gain_type25: default
    gain_type26: default
    gain_type27: default
    gain_type28: default
    gain_type29: default
    gain_type3: default
    gain_type30: default
    gain_type31: default
    gain_type4: default
    gain_type5: default
    gain_type6: default
    gain_type7: default
    gain_type8: default
    gain_type9: default
    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: '2'
    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: ''
    sd_spec1: ''
    sd_spec2: ''
    sd_spec3: ''
    sd_spec4: ''
    sd_spec5: ''
    sd_spec6: ''
    sd_spec7: ''
    show_lo_controls: 'False'
    stream_args: ''
    stream_chans: '[0,1]'
    sync: sync
    time_source0: external
    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: [99, 308]
    rotation: 0
    state: true

connections:
- [analog_sig_source_x_0, '0', uhd_usrp_sink_1, '0']
- [analog_sig_source_x_0_0, '0', uhd_usrp_sink_1, '1']
- [uhd_usrp_source_1, '0', qtgui_freq_sink_x_0, '0']
- [uhd_usrp_source_1, '1', qtgui_freq_sink_x_0, '1']

metadata:
  file_format: 1

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