https://github.com/unicode-org/icu/releases/download/release-70-1/icu4c-70_1-src.tgz
sudo dnf install bzip2-devel
sudo ln -s /usr/lib64/libbz2.so.1.0.8 /usr/lib64/libbz2.so.1.0
sudo dnf install python2.7
Sceptre on Fedora 36
17 SepSetting up Ettus USRP X300
18 Dechttps://kb.ettus.com/USRP_Host_Performance_Tuning_Tips_and_Tricks
https://files.ettus.com/manual/page_usrp_x3x0.html
Increase Socket Buffers
sudo vi /etc/sysctl.conf
# Increase buffers for USRP
net.core.wmem_max=100000000
net.core.rmem_max=100000000
net.core.wmem_default=100000000
net.core.rmem_default=100000000
Realtime Priority
sudo vi /etc/security/limits.conf
# Add for USRP realtime priority
myusername - rtprio 99
Will require re-login
Adjust Ethernet MTU
9000
Note intervening switches need jumbo frames enabled.
Set CPU Performance
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
Change GRUB
sudo vi /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="pti=off spectre_v2=off l1tf=off nospec_store_bypass_disable no_stf_barrier"
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
Updating Firmware and FPGA
uhd_usrp_probe --args "addr=192.168.1.13"
sudo /usr/local/lib64/uhd/utils/uhd_images_downloader.py
/usr/local/bin/uhd_image_loader --args="type=x300,addr=192.168.1.13"
Cycle power on the USRP
Benchmark
cd /usr/local/lib64/uhd/examples
./benchmark_rate --rx_rate 100E6 --tx_rate 100E6 --args "addr=192.168.1.13"
Setting up the Airspy R2
4 Junhttps://github.com/airspy/airspyone_host
Add udev Rules
sudo vi /etc/udev/rules.d/99-airspy.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="1d50", ATTRS{idProduct}=="60a1", MODE:="0666"
sudo udevadm control --reload-rules
CMakeLists.txt for dial_tone.cc
30 MayIf you want to compile dial_tone.cc outside of either the GR source tree or OOT module, this is the minimum required CMakeLists.txt (courtesy of Johnathan Corgan)
cmake_minimum_required(VERSION 2.6)
project(dialtone CXX)
find_package(Boost "1.35" COMPONENTS system)
set(GR_REQUIRED_COMPONENTS RUNTIME ANALOG AUDIO)
find_package(Gnuradio "3.7.2" REQUIRED)
include_directories(${GNURADIO_ALL_INCLUDE_DIRS})
add_executable(dialtone dial_tone.cc)
target_link_libraries(dialtone ${Boost_LIBRARIES} ${GNURADIO_ALL_LIBRARIES})
Setting up the Ettus USRP E310
29 JunAdd udev Rules for E310 Serial Console
sudo vi /etc/udev/rules.d/99-usrp-e310.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6015", MODE:="0666"
sudo udevadm control --reload-rules
Serial Console Login
Plug in power and wait a few seconds for E310 to boot, then plug in microUSB.
dmesg to figure out the assigned serial port (i.e. /dev/ttyUSB4)
screen /dev/ttyUSB4 115200
Login as root
Setting Static IP
vi /etc/network/interfaces
# Wired or wireless interfaces
auto eth0
#iface eth0 inet dhcp
iface eth0 inet static
address 192.168.1.14
netmask 255.255.255.0
gateway 192.168.1.1
iface eth1 inet dhcp
/etc/init.d/networking stop
GQRX Tips
21 DecPulse Audio
Prior to installation of gqrx make sure pulseaudio is available during build by installing the following:
pavucontrol
pavumeter
pulseaudio-libs-devel
Install gqrx
git clone https://github.com/csete/gqrx.git
cd gqrx
mkdir build
cd build
qmake-qt5 ..
make -j8
sudo make install
Typical device strings
For the b200:
uhd,type=b200,nchan=1
For the X310 with LFRX in slot 2:
uhd,addr=192.168.1.13,subdev=B:A,nchan=1
For the X310 with WBX in slot 1:
uhd,addr=192.168.1.13,nchan=1
For the N210 with LFRX:
uhd,addr=192.168.1.11,subdev=A:A,nchan=1
When switching between devices in gqrx the gain control changes will segfault the application. Fix this by deleting the “gains” section in:
~/.config/gqrx/default.conf
Sending gqrx audio to fldigi
Install fldigi with yum
Configure fldigi sound card to use pulseaudio, leaving server string empty
Launch pulseaudio volume control, and under recording tab, fldigi capture from monitor of built-in audio analog stereo, and set level to 0 dB.
Adjust fldigi waterfall upper signal level and signal range.
Sending gqrx audio to UDP
Configure the network settings in the Network tab of the audio settings window:
UDP host: localhost
UDP port: 7355
Verify the data is coming through at the opposite end using netcat:
nc -l -u 7355
nc -l -u localhost 7355
nc -l -u 127.0.0.1 7355
Pipe the output of netcat to other applications.
The following example will send the audio to the ALSA player application:
nc -l -u 7355 | aplay -r 48k -f S16_LE -t raw -c 1
The following command line will re-sample the raw audio to 22.05 kHz and send it to multimon-ng and decode POCSAG data (thanks to André Schmelzer for this):
nc -l -u 7355 | \
sox -t raw -esigned-integer -b16 -r 48000 - -esigned-integer -b16 -r 22050 -t raw - | \
multimon-ng -t raw -a SCOPE -a POCSAG512 -a POCSAG1200 -a POCSAG2400 -f alpha -
Setting up NI GPIB-USB-HS under Linux
26 JulMostly stolen from: http://www.cl.cam.ac.uk/~osc22/tutorials/gpib_usb_linux.html
Note unlike the ni_usb_b, this is the ni_usb_hs so no firmware has to be loaded at boot, thus gpib_config can be called directly.
Get latest source code
http://linux-gpib.sourceforge.net/
Typical build in /usr/local/src with
./configure
make
sudo make install
Edit configuration
sudo vi /etc/gpib.conf
board_type = "ni_usb_b"
name = "gpib0"
Add udev rules
sudo vi /etc/udev/rules.d/99-linux_gpib_ni_usb.rules
SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="3923", ATTR{idProduct}=="709b", MODE="660", GROUP="username", SYMLINK+="usb_gpib"
SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="3923", ATTR{idProduct}=="709b", RUN+="/usr/local/sbin/gpib_config"
KERNEL=="gpib[0-9]*", ACTION=="add", MODE="660", GROUP="username"
sudo udevadm control –reload-rules
Note udev will not run the gpib_config at boot, so add it in rc.local
sudo vi /etc/rc.d/rc.local
#!/bin/sh
/usr/local/sbin/gpib_config
exit 0
sudo chmod +x /etc/rc.d/rc.local
sudo systemctl enable rc-local.service
systemctl status rc-local.service
Tests
Now plug in the adapter and run ibtest
Reboot and run ibtest
Linux Multimedia
19 Jul
Logitech C615 HD Webcam
sudo vi /etc/udev/rules.d/99-webcam.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="082c", MODE:="0666"
sudo udevadm control --reload-rules
Dell XPS 13 Webcam
sudo vi /etc/udev/rules.d/99-webcam.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="5752", MODE:="0666"
sudo udevadm control --reload-rules
RPM Fusion Repository
sudo yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm
GUVCView Webcam Recording
sudo yum install libwebcam guvcview
Change resolution to 1280×720 on XPS-13
Set sound device to hw:2,0 for Logitech webcam
Screen Recording
sudo yum install gtk-recordmydesktop
Set sound device to DEFAULT for Logitech webcam
May also need to use hw:0,0 (use arecord -l to list input devices)
Video Editing
sudo yum install openshot
Video Playback
sudo yum install vlc
Setting up the Ettus USRP B200
10 JunAdd udev Rules
sudo vi /etc/udev/rules.d/99-usrp-b200.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2500", ATTRS{idProduct}=="0020", MODE:="0666"
sudo udevadm control --reload-rules
Realtime Priority
sudo vi /etc/security/limits.conf
# Add for USRP realtime priority
myusername – rtprio 99
Will require re-login
Update Firmware
sudo /usr/local/lib64/uhd/utils/uhd_images_downloader.py
Probe
uhd_find_devices --args="type=b200"
Benchmark
cd /usr/local/lib64/uhd/examples
./benchmark_rate --rx_rate 60E6 --args "type=b200, master_clock_rate=60E6"
RF Power Amp 