July 2011 - OZ9AEC Website

Gqrx SDR receiver

August 22, 2016July 30, 2011 by Alexandru Csete

Please visit the new Gqrx website. The information on this page is no longer updated!

Gqrx is a software defined radio receiver for Funcube Dongle (FCD), RTL2832U-based DVB-T devices (RTL-SDR), Universal Software Radio Peripherals (USRP) and Osmo SDR devices. It is powered by GNU Radio and the Qt GUI toolkit.

Qtmm souncard modem decoding APRS data from the ISS

August 23, 2016July 11, 2011 by Alexandru Csete

Yesterday I successfully received APRS transmissions from the International Space Station on 145.825 MHz using my Yaesu FT-817 connected to my MacBook Pro via a Signalink audio interface and a USB sound adapter.

Qtmm soundcard modem for decoding AFSK1200

August 23, 2016July 9, 2011 by Alexandru Csete

Last week I started on a new experiment trying to integrate the AFSK1200 demodulator code from multimon into a simple Qt-based graphical application. This experiment had two objectives:

Test the feasibility of integrating the AFSK1200 demodulator from multimon into other applications.
Try using the QAudio framework from Qt for audio I/O that should work on both Linux, Windows and Mac OS X.