Technology of Q 2500 colour TV set
Technology of Q 2500 colour TV set
Technology of Q 2500 colour TV set
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Technology</strong> <strong>of</strong> Q <strong>2500</strong> <strong>colour</strong> <strong>TV</strong> <strong>set</strong>Q<strong>2500</strong>/B memorycontrolI2271VPC3230MAIN21 27 53 182 4 3RSTR16/2827MHz/ClockInterlace Output - 0=Field 1/1=Field 2Y/C Output Enable1LC0-7 1LM0-7I2311SAA4979H +BESICHalf picturememory3.5 Mbit4.5 Falconic module SAA 4993With the conversion <strong>of</strong> a picture signal to aline coupled sampling and level adaptation at3.3 V, 100 Hz is achievable with a 3 Mbit picturememory and a memory controllerAs doubling <strong>of</strong> the picture change frequency,depending on picture quality and picture presentation,can lead to undesired side effects, anumber other features are provided on the Q<strong>2500</strong> chassis. This means that the side effectscan be compensated for.4.5.1 Noise reductionTogether with a second picture memory, SAA4993 is able to eliminate some <strong>of</strong> the picturenoise that occurs owing to an inadequate antennasignal.Internally the IC has two separate signalpaths, one for the Y and one for the chromasignals. Functionally they are both identical. Inthe chroma path is a demultiplexer on the inputand a multiplexer before the output.Document Q <strong>2500</strong> 96 © Loewe ProCollege
Change language