USRP B2xx Receive Example
Receive and display spectrum from a USRP B2xx over WebUSB. Runs with no hardware: Device is set to the test generator fake:100000. To use a real USRP, open the USRP B2xx Source and pick a device. On a board that has not been used since it was powered on you will be asked twice, because it changes USB identity when its firmware loads, and the first run after that loads the FPGA image, which takes a few minutes.
- Author Marc
- Category Usrp
- Blocks 7
- Connections 2
- File
usrp/b2xx_spectrum_analyzer.grc
Blocks used
| Block | Module | Used |
|---|---|---|
| QT GUI Range | GNU Radio | 2 |
| GUI Layout | GNU Radio | 1 |
| QT GUI Chooser | GNU Radio | 1 |
| QT GUI Frequency Sink | GNU Radio | 1 |
| QT GUI Waterfall Sink | GNU Radio | 1 |
| USRP B2xx Source | GNU Radio | 1 |
Flowgraph source
usrp/b2xx_spectrum_analyzer.grc
options:
parameters:
author: Marc
comment: ''
copyright: ''
description: "Receive and display spectrum from a USRP B2xx over WebUSB.\nRuns with no hardware: Device is set to the test generator fake:100000. To use a real USRP, open the USRP B2xx Source and pick a device. On a board that has not been used since it was powered on you will be asked twice, because it changes USB identity when its firmware loads, and the first run after that loads the FPGA image, which takes a few minutes."
generate_options: qt_gui
id: USRP_B2xx_Receive_Example
title: USRP B2xx Receive Example
states:
coordinate: [10, 10]
rotation: 0
state: enabled
blocks:
- name: center_freq
id: variable_qtgui_range
parameters:
comment: ''
label: RF Frequency
min_len: '200'
orient: QtCore.Qt.Horizontal
rangeType: float
start: '70000000'
step: '1000000'
stop: '6000000000'
value: '100000000'
widget: counter_slider
states:
coordinate: [600, 10]
rotation: 0
state: enabled
- name: gain
id: variable_qtgui_range
parameters:
comment: ''
label: RX Gain
min_len: '160'
orient: QtCore.Qt.Horizontal
rangeType: float
start: '0'
step: '1'
stop: '76'
value: '30'
widget: counter_slider
states:
coordinate: [890, 10]
rotation: 0
state: enabled
- name: samp_rate
id: variable_qtgui_chooser
parameters:
comment: ''
label: Sample Rate
labels: '["1 MHz", "2 MHz", "4 MHz", "5 MHz", "8 MHz", "10 MHz", "15.36 MHz", "20 MHz"]'
options: '[1000000, 2000000, 4000000, 5000000, 8000000, 10000000, 15360000, 20000000]'
orient: Qt.QVBoxLayout
value: '1000000'
widget: combo_box
states:
coordinate: [1180, 10]
rotation: 0
state: enabled
- name: qtgui_freq_sink_x_0
id: qtgui_freq_sink_x
parameters:
affinity: ''
alias: ''
alpha1: '1'
alpha10: '1'
alpha2: '1'
alpha3: '1'
alpha4: '1'
alpha5: '1'
alpha6: '1'
alpha7: '1'
alpha8: '1'
alpha9: '1'
autoscale: 'True'
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: center_freq
fftsize: '2048'
freqhalf: 'True'
grid: 'False'
label: Relative Gain
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'
maxoutbuf: '0'
minoutbuf: '0'
name: Spectrum
nconnections: '1'
norm_window: '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_level: '0'
tr_mode: qtgui.TRIG_MODE_FREE
tr_tag: ''
type: complex
units: dB
update_time: '0.1'
width1: '1'
width10: '1'
width2: '1'
width3: '1'
width4: '1'
width5: '1'
width6: '1'
width7: '1'
width8: '1'
width9: '1'
wintype: window.WIN_RECTANGULAR
ymax: '10'
ymin: '-140'
states:
coordinate: [390, 220]
rotation: 0
state: enabled
- name: qtgui_waterfall_sink_x_0
id: qtgui_waterfall_sink_x
parameters:
affinity: ''
alias: ''
alpha1: '1'
alpha10: '1'
alpha2: '1'
alpha3: '1'
alpha4: '1'
alpha5: '1'
alpha6: '1'
alpha7: '1'
alpha8: '1'
alpha9: '1'
average: '1.0'
axislabels: 'True'
bw: samp_rate
color1: '0'
color10: '0'
color2: '0'
color3: '0'
color4: '0'
color5: '0'
color6: '0'
color7: '0'
color8: '0'
color9: '0'
comment: ''
fc: center_freq
fftsize: '1024'
freqhalf: 'True'
grid: 'False'
int_max: '10'
int_min: '-140'
label1: ''
label10: ''
label2: ''
label3: ''
label4: ''
label5: ''
label6: ''
label7: ''
label8: ''
label9: ''
legend: 'True'
maxoutbuf: '0'
minoutbuf: '0'
name: Waterfall
nconnections: '1'
type: complex
update_time: '0.1'
wintype: window.WIN_RECTANGULAR
states:
coordinate: [390, 400]
rotation: 0
state: enabled
- name: wasm_gui_layout_0
id: wasm_gui_layout
parameters:
affinity: ''
alias: ''
columns: '12'
comment: ''
layout: '{"center_freq":[0,0,4,1],"gain":[4,0,4,1],"samp_rate":[8,0,4,1],"qtgui_freq_sink_x_0":[0,1,12,3],"qtgui_waterfall_sink_x_0":[0,4,12,6]}'
row_height: '60'
states:
coordinate: [310, 10]
rotation: 0
state: enabled
- name: wasm_usrp_b2xx_source_0
id: wasm_usrp_b2xx_source
parameters:
affinity: ''
alias: ''
antenna: RX2
bandwidth: '0'
center_freq: center_freq
comment: ''
device: fake:100000
gain: gain
master_clock_rate: '0'
maxoutbuf: '0'
minoutbuf: '0'
samp_rate: samp_rate
states:
coordinate: [10, 240]
rotation: 0
state: enabled
connections:
- [wasm_usrp_b2xx_source_0, '0', qtgui_freq_sink_x_0, '0']
- [wasm_usrp_b2xx_source_0, '0', qtgui_waterfall_sink_x_0, '0']
metadata:
file_format: 1
grc_version: 3.11.0.0