Charles Rhodes is a consultant in the field of television broadcast technologies and planning.
With the end of the FCC’s spectrum auction in January, it’s time to measure its damaging effects on broadcasters.
In the past, I have written about out-of-band (OOB) interference between ATSC signals in different bands: the low VHF band into a high VHF channel and a high VHF band ATSC into a UHF channel.
My colleague Linley Gumm and I recently conducted a series of measurements of the threshold protection (desired/undesired (D/U)) ratios required for modern ATSC receivers to reject interference from LTE signals radiated by base stations in the 600 MHz Band.
In 2014 the FCC published details on how it will configure the 600 MHz Band.
It’s a given that there is going to be considerable “channel shuffling” after the upcoming television broadcast spectrum auctions.
In May, the FCC proposed a definition of the phrase “harmful interference” in connection with reception of TV signals in the repacked 600 MHz broadcast spectrum.
In its recent Report and Order, the FCC revealed 11 scenarios under consideration for a 600 MHz Band Plan following the spectrum auctions.
By now almost everyone knows the NAB has filed a lawsuit against the FCC over its spectrum auctions TV channel repack.
My colleague Linley Gumm and I accidentally discovered when we turned our RF test bed on for a second day of testing of inter-band interference, all seven of our DTV receivers failed to come on. Some had much greater jamming than in our tests two days earlier.
Last month, we discussed third-order intermodulation products seldom covered in the technical literature: 2Fa + Fb, and 2Fb + Fa. We started with spectrum plots for two unmodulated carriers at the center of Ch. 9 (189 MHz) and Ch. 11 (201 MHz).
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