Wednesday, April 12, 2006
HD RADIO CAUSES INTERFERENCE ON AM AND FM BANDS
MULTIPATH INTERACTION AND CANCELLATION BETWEEN HD DIGITAL AND ANALOG FM SIGNALS DESTROYING FM COVERAGE!
The multipath signal cancellation between digital and analog FM signals not only jams adjacent channel staions but causes additional multipath signal loss to the digital host stations analog signal, and produces digital noise in the analog stereo signal.
In particular, it causes neighboring FM stations to disappear if they are lower-powered or further away (a common experience when listening in the car). For example, when 107.7 in San Francisco turned on IBOC, it made 107.5 from Santa Cruz (the famous KPIG) disappear from the south bay.
In my experience, it also degrades the analog FM signal (of the IBOC broadcaster) with additional multipath.
Here is the link:
http://hardware.slashdot.org/article.pl?sid=06/03/02/187238
HD RADIO-IBOC-Ibiquity should NOT get final FCC approval!
HD RADIO IS A DEFECTIVE, DESTRUCTIVE TECHNOLOGY.
There is no need to approve a defective digital AM or FM system.
Here is a link to a truly compatible FM digital system that dosn't cause jamming and is fully approved RIGHT NOW!
http://www.dreinc.com/
The multipath signal cancellation between digital and analog FM signals not only jams adjacent channel staions but causes additional multipath signal loss to the digital host stations analog signal, and produces digital noise in the analog stereo signal.
In particular, it causes neighboring FM stations to disappear if they are lower-powered or further away (a common experience when listening in the car). For example, when 107.7 in San Francisco turned on IBOC, it made 107.5 from Santa Cruz (the famous KPIG) disappear from the south bay.
In my experience, it also degrades the analog FM signal (of the IBOC broadcaster) with additional multipath.
Here is the link:
http://hardware.slashdot.org/article.pl?sid=06/03/02/187238
HD RADIO-IBOC-Ibiquity should NOT get final FCC approval!
HD RADIO IS A DEFECTIVE, DESTRUCTIVE TECHNOLOGY.
There is no need to approve a defective digital AM or FM system.
Here is a link to a truly compatible FM digital system that dosn't cause jamming and is fully approved RIGHT NOW!
http://www.dreinc.com/
