Digital TV
Charlie Rhodes is a consultant in the field of television broadcast technologies and planning. He can be reached via e-mail at
cwr@bootit.com.
FMI into the Low VHF Band
by Charles W. Rhodes, 02.17.2010
I have serious concerns about the viability of such a broadcast service. More...
A New Kind of FMI on The Horizon?
by Charles W. Rhodes, 01.14.2010
FMI now has three aspects. More...
Obstacles to DTV Reception
by Charles W. Rhodes, 11.10.2009
Our friend reminded us that the day we came was warm and sunny, and when it rains, that channel simply vanishes. More...
Obstacles to DTV Reception(2)
by Charles W. Rhodes, 11.10.2009
Our friend reminded us that the day we came was warm and sunny, and when it rains, that channel simply vanishes. More...
DTV Interference on VHF Channels 4–13
by Charles W. Rhodes, 10.07.2009
Such second-order distortion products may be generated by strong local FM radio signals in the front end of DTV receivers and downconvertors. More...
Making 'Noise' About DTV Received Power
by Charles W. Rhodes, 08.19.2009
As many DTV signals are radiated in the UHF band with more than this power, they enjoy some signal level margin within their coverage area. More...
DTS Could Create DTV Reception Problems
by Charles W. Rhodes, 08.04.2009
My concern is the interference such signals may cause to reception near the secondary transmitters More...
Testing for DTV Interference
by Charles W. Rhodes, 06.22.2009
Any active device, amplifier or mixer will generate second order distortion products given that the input signal voltage overloads the active device. More...
Interference From Television Band Devices
by Charles W. Rhodes, 04.09.2009
The FCC has defined how close to, but outside of the predicted noise-limited perimeter of a station, a DTVB can be operated on the same channel as a DTV station in that community. More...
Interference to DTV Reception
by Charles W. Rhodes, 01.26.2009
The FCC prohibits fixed devices from using adjacent channels until it
has been proven to the satisfaction of the commission that spectrum sensing
has progressed to the point where the commission deems the technique to
be More...
What I Know About the Great White Spaces
by Charles W. Rhodes, 12.22.2008
Broadcasters are well aware that the spectrum of DTV transmitters extends outside of the allocated channel. They know this because the FCC has required that this out-of-channel emission be controlled with its RF mask More...
White Spaces: Myth or Reality?
by Charles W. Rhodes, 11.18.2008
In this market, all vacant channels in the high VHF and UHF bands are also adjacent channels to one or two broadcast channels. So are adjacent channels really suitable for sharing? More...
Improving a Digital EAS With the New ATSC Signal
by Charles W. Rhodes, 10.15.2008
What a DTV signal can do that an analog signal such as NTSC could not do is to awaken sleeping persons believed by the local authorities to be threatened. More...
An Emergency Alert System for the Digital Era
by Charles W. Rhodes, 09.17.2008
What is needed is an EAS which can alert the threatened populace while not scaring the entire nation. Our present EAS cannot do this, but a well designed Digital EAS could over our DTV channels. More...