منابع مشابه
UHF RF Transmitter and Receiver
Here we propose a current mode oscillator circuit using Q-Dot technology and subsequently we modify this circuit for transmitter and receiver design. We like to note that transmitter is a amplitude modulation (AM) to frequency modulation (FM) conversion technique. The receiver is of Super heterodyne structure, where the RF front end is implemented by Q-Dot devices and the IF stages are implemen...
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ITH the advent of ultra-high-frequency television and the subsequent allocation of specific UHF channels, the need for a VHF-UHF television tuner becomes apparent. This tuner should ideally make the maximum use of the same components on VHF and UHF, so that there would be a minimum duplication of parts. This design should be one which would give optimum performance and still be easy to fabricat...
متن کاملRecent Developments in Uhf and Microwave Terrestrial Television in the Uk
Following the allocation of commercial franchises in 1997 the UK is expected to launch a UHF digital terrestrial television service in late 1998. A shortage of suitable taboo channels restricts the use of repeaters. Gaps in coverage area may be lled by 40 GHz MVDS technology.
متن کاملLINE SHUFFLING: Development of a scrambling system for terrestrial UHF television broadcasts
This Report describes the development of a scrambling system for overnight downloading of television programmes to video cassette recorders – the BBC Select service. The scrambling techniques used successfully for many years for satellite broadcasting and cable distribution are often unsuitable for UHF terrestrial broadcasting using VSB-AM. This is because of the constraints of equipment, such ...
متن کاملArchitecture of a DSP Based Dual-Mode ATSC/NTSC Television Exciter and Transmitter
When designing hardware to produce ATSC signals, a little extra thought, and a little extra hardware will allow use of the same platform to produce both ATSC and NTSC signals. Novel combinations of modern FieldProgrammable Gate Arrays, (FPGAs), general purpose digital signal processors, and programmable digital filter parts make possible the development of a flexible signal generation system th...
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ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1965
ISSN: 1884-9644
DOI: 10.3169/itej1954.19.621