Article View: rec.audio.tech
Article #482Re: HD RADIO is no worse than DAB or DRM radio
From: Eric F. Richards
Date: Fri, 09 Nov 2007 20:25
Date: Fri, 09 Nov 2007 20:25
28 lines
3012 bytes
3012 bytes
"Earl Kiosterud" <someone@nowhere.com> wrote: > > > Robert, > > Was AM radio ever allowed audio to 15 KHz? I read many years ago that it was, perhaps > before the NRSC recommendation was adopted by the FCC. I presumed that the stations either > were allowed to overlap 5 KHz (doubtful), or that stations in a given area were separated by > at least 30 KHz. I'm not Robert, but... Prior to FM multiplex stereo, there were some experimental stereo broadcasters who transmitted one channel on FM and the other on AM. A friend of mine has an old Lafayette tuner set up this way, along with a plug-in jack for a multiplex adapter when they became available. I think there was quite a large amount of effort to produce wideband AM. Amplitude modulation itself certainly has no such limitations; however it is possible that tuning the tower system to handle that wide a bandwitdth within MW would be a problem. Don't know. -- Eric F. Richards, efricha@dim.com "It's the Din of iBiquity." -- Frank Dresser
Technical Details
Message-ID:
<obg9j31afbeo5221d99lfudbtgmmgut6rn@4ax.com>Path:
arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.forethought.net!news.forethought.net.POSTED!not-for-mailReferences:
<1191096585.135753.167530@d55g2000hsg.googlegroups.com> <46ffb388.44729093@news.plus.net> <1191099764.677637.18050@22g2000hsm.googlegroups.com> <1191108136.459409.212620@50g2000hsm.googlegroups.com> <%vBLi.275$0I5.137@trnddc08> <1191140172.205755.136880@y42g2000hsy.googlegroups.com> <Crqdndk7urPjlp3anZ2dnUVZ_g-dnZ2d@championbroadband.com> <KJudnWNZ2vjHGpjanZ2dnUVZ_vumnZ2d@giganews.com> <pt%Yi.403$CI1.60@trnddc03>Show Full Headers
Complete Article Headers
X-Google-Thread: fb1f8,428391383e1324a5 X-Google-Thread: 10a749,428391383e1324a5 X-Google-Thread: 114aac,cd4ad6cadcf2b245 X-Google-Thread: f7d8a,cd4ad6cadcf2b245 X-Google-Attributes: gidfb1f8,gid10a749,gid114aac,gidf7d8a,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.forethought.net!news.forethought.net.POSTED!not-for-mail NNTP-Posting-Date: Fri, 09 Nov 2007 14:25:00 -0600 From: Eric F. Richards <efricha@dim.com> Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast Subject: Re: HD RADIO is no worse than DAB or DRM radio Date: Fri, 09 Nov 2007 13:25:02 -0700 Organization: What organization? Message-ID: <obg9j31afbeo5221d99lfudbtgmmgut6rn@4ax.com> References: <1191096585.135753.167530@d55g2000hsg.googlegroups.com> <46ffb388.44729093@news.plus.net> <1191099764.677637.18050@22g2000hsm.googlegroups.com> <1191108136.459409.212620@50g2000hsm.googlegroups.com> <%vBLi.275$0I5.137@trnddc08> <1191140172.205755.136880@y42g2000hsy.googlegroups.com> <Crqdndk7urPjlp3anZ2dnUVZ_g-dnZ2d@championbroadband.com> <KJudnWNZ2vjHGpjanZ2dnUVZ_vumnZ2d@giganews.com> <pt%Yi.403$CI1.60@trnddc03> X-Newsreader: Forte Agent 1.93/32.576 English (American) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 28 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 208.73.251.166 X-Trace: sv3-RQ4hiYbRksEivmyLMnhXpupbsA5wVSfeWmLq91KFdSHxavFZQb7NA6cGYRDCyRlSx8Qg3KxBTKvgvKx!XRzag2RynUdVpN7i8Umlgn5SJ+MJvWby0r4ZnNgm2xxvCammuEUMyjTeIBhWDxCypG7U3Pze3lVL!YI2uJPnFD9XJB2MqLWyQbPw= X-Complaints-To: abuse@forethought.net X-DMCA-Complaints-To: abuse@forethought.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.36