HackDay 2022 - WebSDR
Subject At nightfall, everything lights up. A beacon emits a signal in order to be recovered. The signal is transmitted at 3.58 MHz every minute for about 30 seconds. Find the message transmitted. The flag is of the form HACKDAY{…} Find the transmitted signal According to the subject, the signal is only transmitted in the evening. By going to WebSDR F5NKP (for example) we will be able to listen to the different signals transmitted on the radio waves....