The international broadcaster's signals are wider (5-10 kHz vs. 2.5 kHz) so an AM or NBFM IF filter and a wider audio bandwidth is required to feed the sound card. See drm.sourceforge.net and www.drmrx.org for software. Many radios won't allow the BFO to be offset far enough to receive SSB this wide so they need modification.
73, John KD6OZH ----- Original Message ----- From: John J To: digitalradio@yahoogroups.com Sent: Tuesday, March 27, 2007 10:12 UTC Subject: Re: [digitalradio] What's the roar? Fine : Can we use WinDRM to receive DRM Shortwave Broadcasts? If so , that's good. If not , where do we get a codec to allow it ? Consider : , We can them use shortwave DRM broadcasts to test our systems and to enjoy what shortwave has to offer and , by successfully receiving a shortwave broad casted DRM signal we will know our system works. Even if we need another program to receive SW broadcaster's DRM, that lets us test our hardware connections and much moire 73 John ----- Original Message ---- From: Pete <[EMAIL PROTECTED]> To: digitalradio@yahoogroups.com Sent: Monday, March 26, 2007 5:39:49 PM Subject: Re: [digitalradio] What's the roar? Its Radio NZ DRM operating from Taupo 59+++ here and wipe out fair chunk of band !! De Pete ZL2AUB > > > > Without even listening, I would have guessed it is a SWBC station > operating under DRM. > > OK, I turned on the rig here and that is what it almost surely is. Very > similar to ham DRM, except, of course, much wider. > > 73, > > Rick, KV9U > > Robert Chudek - K0RC wrote: > > On 7147 KHz at about 14:00 UTC today there was a 10~12 KHz wide > > digital signal that was booming in. It's still there 2 hours later but > > only S-5 now. Can anyone tell me what this "noise" is about? It sounds > > almost at bad as the old Russian jamming signals from years gone by. > > > > 73 de Bob - KØRC in MN > > > > > > > ------------ --------- --------- --------- --------- --------- - > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 268.18.18/734 - Release Date: 26-03-07 2:31 PM > ------------------------------------------------------------------------------ Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. Check it out.
