Wednesday, August 15, 2007
Short Wave Check with a SDR-IQ & Art of SDR-reception
During a Latin Check on Tropical Band 60 meters on 4725...4915 I found several stations from Bolivia, Brazil and Guatemala on July 24.
While studying the signal of Radio Universitaria (Bolivia) on 4732 I found this interesting picture using the SDR-IQs combo display. It shows nicely the terrible RTTY QRM on both sides of the station - the RTTY tx has short breaks after about 1 minute transmission as you can see. You can see also the close down of the Bolivian as well. The staion is usually covered byt the RTTY-QRM and can be heard only about 15 seconds between the pulses, however sometimes there are longer breaks. It seems the station has disappeared in the beginning of August.