venerdì 11 febbraio 2011

DRM trial transmission from Sottens

Vi segnalo queste trasmissioni speciali DRM dall'impianto onde medie di Sottens gestito in questo periodo dai radioamatori svizzeri

73 And IW0HK

---------- Forwarded message ----------
From: Mathias Coinchon
Date: Fri, Feb 11, 2011 at 2:31 PM
Subject: [Openradio] DRM trial transmission

Recently a 600kW Mediumwave transmitter has been phased out in Switzerland and a local amateur radio club has been able to get the right to use the huge antenna (188m) for a month for amateur radio transmission. More info and antenna pictures on With one of these amateur radio friend (HB9DTX), we have a decided to make a DRM transmission trial on this transmitter using Spark software (special thanks to Michael Feilen who gave us a full version for this), a USRP and amateur radio linear amplifier. We will use the narrowest band so 4.5kHz and high robustness to transmit slides. So if you are interested, you are more than welcome to try to receive our signal and send us back reception report.

The tests will happen on the 2 next Sunday, on 13th February 2011 and 20th
February with 15 minutes periods on the following times (same for both sundays):
- 20h-20h15 (19h-19h15 UTC) TX on 7.180 MHz
- 21h-21h15 (20h-10h15 UTC) on 3.780 MHz

To receive the signal here are some links on the techniques:

Mathias Coinchon

Andrea Borgnino IW0HK - HB9EMK