Re: [drakelist] am band

[Herbert Schulz]

I'm not an US-citizen, so my following statement is a wild guess, anyhow: Maybe this signal is not an interference, but a transmis- sion of the emerging, new AM-broadcast mode called "DRM" (Digital Radio Mondiale) which uses QAM32 or QAM64 as a modulation method and delivers crystal-clear audio, which is close to FM-hifi-qua- lity - in some cases (at least here in Europe) even in stereo. If that is a transmission of that kind, i would suggest to listen to it (a IF-downconverter to a final IF of 12[kHz] and a PC with sound- blaster and demodulator software is needed) - the audio quality will for sure surprise anybody. Those transmissions could be easily identi- fied, because they have sharp bandwith limits: 10[kHz] (+/-5[kHz] at shortwave and 9[kHz] (+/-4.5[kHz]) at medium wave (AM) and long wave. vy73 de DG7MCC, Herbert Schulz           DAN COTSIRILOS schrieb: Has anyone else in the Chicago area noticed the digital signal on both sides of WIND 560?  If that is the kind of interference that broadband is going to make uh oh!!!!  Dan