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#Gnuradio morse decoder install#
#Gnuradio morse decoder software#
#Gnuradio morse decoder code#
#Gnuradio morse decoder Pc#
#Gnuradio morse decoder windows#

AM for old style Amplitude Modulation used by broadcasting stations,.

WFM (stereo or mono) for Wide Frequency Modulation used by broad casting stations,.

USB or LSB for single side band amplitude modulation, Upper or Lower Side Band,.

#Gnuradio morse decoder code#

CW-U or CW-L for Morse code On-Off modulation (use Upper or Lower side band depending on possible interference from another carrier close by).Mode setting is for the modulation mode of the signal received, it can be: Here it is shown for receiving weather fax, in USB and a Normal filter. Personally, I prefer to keep that offset frequency to 0.00 and set the main frequency.įilter and mode go together. weather fax reception as the frequency to be used is normally 1.9 kHz below the nominal frequency of the station.

#Gnuradio morse decoder windows#

The frequency windows allows you to offset the receiver actual frequency from the main frequency entered in the left window. In the Upper right window appears either the Receiver Options or the Input controls depending on which tab you clicked on, as shown below: Gqrx receiver options Keep it to 0.000 until you are familiar with all the functionalities of gqrx. It display the offset of the actual frequency from the central line of the main display frequency. Note that there is a second frequency displayed on the right frame of “Receiver Options” tab. Gqrx toolbar and main frequency control widget Alternatively you can move the pointer and click on the upper or lower part of any digit or use the Up/Down key to change it. To tune the received frequency move the mouse pointer on any of the frequency digits and use the mouse wheel to change it. The color of the spectrum display can be changed by the “color” line of the FFT setting tab. On the upper right side of the main window you will find frames with tabs for the input and options of the Receiver, and lower right side frames with tabs for RF signal processing (FFT Settings) and Audio output control.

Below the spectrum frame is the waterfall frame displaying the spectrum history.

Below the frequency is the RF spectrum frame around that frequency.

The current frequency of the receiver (here 8.038 100 MHz).

In the left part of the main window starting from the top you find: The upper part of the gqrx window proposes various roll-down menus:īelow these menus you find a number of short-cut buttons: Gqrx main window while the application is running Using gqrx The central window should show something like below, and noise should be heard from your speaker or head-phones, if not, check your audio volume control. Gqrx main window.Īctivate gqrx by clicking on the grey start/stop button just below the File menu (see the red arrow pointing at the start/stop button). Leave the other fields as they are then click OK. Make sure that the Device line shows the FunCube Dongle or the device you are using. The first window to appear is for configuring the Input/Output of the device: I/O device configuration dialog

#Gnuradio morse decoder Pc#

Having the device connected to the PC and the appropriate antenna, open a terminal and launch gqrx with the line command: $ gqrx

For HF and VHF, I found it convenient to use 1m of RG-174 coax terminated at one end with a male SMA and a male BNC at the other end such that I can reuse my HF antenna tuning box.

Connect the antenna to the female SMA connector of the FunCube dongle.

Use an USB extension cable for the connection to the PC to distance the receiver from the PC (hefty source of noise) and minimise the mechanical loads applied to the dongle connectors.

Connect the FunCube Dongle Pro+ receiver to the PC USB-2 port (do not use a USB-3 port as it may not work reliably on all PC).

Once gnuradio and gqrx are installed (above procedure depends on which OS you are using):

#Gnuradio morse decoder install#

In order to use gqrx you will need to install gnuradio and gqrx packages with the following command for Linux Debian: $ sudo apt-get install gnuradio gqrx Earlier versions of Debian come with an older version of gqrx that may not have all the features described here. The following describes the procedure to install gqrx and use it with a FunCube Dongle Pro+ receiver on an Asus Eeepc-1200 NoteBook setup with Linux Debian 8 and KDE.

#Gnuradio morse decoder software#

Gqrx is a software defined radio (SDR) receiver written by Alexandru Csete to control and use a variety of SDR hardware. Written by Robert Lainé (robert.laine at ), this document provides a practical introduction to getting started with gqrx.