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Electromagnetic
Signals from Bacterial DNA
Yes, life does apparently give off that sort of resonance. (4/15/11)
Elevated
HD Power, Part II
Continental Electronics' senior scientist tackles questions of implementing FM-HD
at increased power levels. (10/19/10)
HD Radio Self-Noise
An excellent overview of FM-HD's effect on analog receivers; includes
DIY technical information on how to improve your reception. (10/7/10)
Look
Before You Leap
Continental Electronics' senior scientist reports in detail on the technical
detriments of an FM-HD power hike. (8/23/10)
Transmitter
Site: The Dark Side of IBOC FM
A broadcast engineer with experience involving FM-HD interference shares his
story. (July 2010)
NPR
Labs: Digital Radio Coverage and Interference Analysis
Download the report here. The basic gist: raising FM-HD digital sideband power
levels by a factor of 10 will most definitely increase to both adjacent stations
and a station's own analog signal. (7/15/08)
IBOC
Interference Calculations
A relatively technical yet intelligible analysis of how AM-HD stations cause
major interference to themselves and each other. (August 2007)
HD
Radio Digital Carrier Power Calculations
A Vice President of Engineering at Clear Channel ponders just how powerful AM-HD
digital sidebands should really be. (2007)
IBOC
Coverage and Interference Issues
PDF of a presentation given by engineer Doug Vernier on the potential pitfalls
of HD-related interference both among and within stations. (2006)
SWR,
Return Loss, and Reflection Coefficient
Explains the importance of SWR, from Wenzel Associates.
Vertical
Polarization and FM Transmitter Antenna Performance
Presented at the 21st Brazilian Congress of Broadcasting. (1998)
Electromagnetic
Interference
UK-based page collects reports (both published and anecdotal) of in-flight personal
electronic devices interfering with aircraft avionics. (1996) |
