Install glfer by entering the following commands in the terminal:
sudo apt update sudo apt install glfer
Description:
program for reception and transmission of QRSS/DFCW signals
Glfer is composed of two main parts: a spectrogram window, where you can see the spectrum of the received signal vs. time and transmission functions, to emit cw characters at a slow but precisely controlled speed, using the QRSS (slow CW) or DFCW (Dual Frequency CW) modes.
Homepage: http://www.qsl.net/in3otd/glfer.html
Version: 0.4.2-2build1
Section: universe/hamradio