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Electromagnetic
Interference
UK-based page collects reports (both published and anecdotal) of in-flight personal
electronic devices interfering with aircraft avionics.
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).
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