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Resolution digital machine - GOSPELL GSR-1000

(Y, Pb, Pr) chip, while supporting the progressive scan feature, but the market demand is not great (interlaced or mainstream product), the dimensionless group of the machine is only 2 composite video signal output 0T212 chip's performance video, audio, In addition to supporting some favorably MPEGI MPEGII and audio, the sampling frequency 16k, 2205k, 24k. 32k, 44.1k. 48KHz, S / PDIF output, in addition to support AC-3 and DTS digital audio compression and PCM stereo digital audio compression, it also supports 51-channel output and AC-3 decoder, but can through the D / A converter output. In addition, each channel can be independent of the volume control and mute control of digital receiver, this function is not available in most (Note: The original design is used for DVD surround sound output, not used in the digital machine, but if the satellite AC-3 program with the program, Oh, can use this feature) now talk about the board structure (as its internal diagram, Satellite refers to the actual satellite signal. Dish is the antenna, NIM refers to the TUNER, etc. ), the satellite signal and antenna LNB,[link widoczny dla zalogowanych], and so is not presented here,[link widoczny dla zalogowanych], the outdoor unit, and now some talk about TUNER. Music of the program to bind together a number of integration (but there are integrated on the motherboard called onboard) components, including the famous production of the 0184/0194 series of products SHARP, rich soil Fujitsu single TUNERMB86A15, ZarLinkMT312/10312 series; the machine using the integration of program production ZarLink TUNER, from its chassis structure and circuit layout to see is domestic, while the production of 0184/0194 SHARP compatible products (due to backwards TUNER is welded to the motherboard, I temporarily unable to be removed, so TUNER internal chip can not see, but from the blind scan receiver, the speed of the search finished only ten minutes in Asia 3S characteristics of the satellite view, should be ZarLink's). In order to ensure the performance TUNER, TUNER power is dealt with separately,[link widoczny dla zalogowanych], 33V and 5V power supply directly from the power supply board pulled out, to avoid signal interference caused by other TUNER indicators declined. After demodulation and error correction of the transport stream to the CPU using parallel processing (CT212 supports parallel and serial data stream input). CPU to send audio and video data streams flow into the signal through two SDRAM (the machine uses ETRON produced 1M × 16 of the SDRAM) buffer; in,[link widoczny dla zalogowanych], introduced by the above video encoder, digital film converter conversion into a TV video signal can be identified. Only one set of audio channel signal received E] PT8211 (PTC manufactured in Taiwan, a general purpose 16-bit analog conversion chip) for D / A conversion, and through E] UTC358 amplified output op amp. At the same time as relatively simple functions can only receive free signal, so the main program is not great, a 512KBYTE enough to use flash memory (used in the machine produced by Taiwan Macronix 29LV400) display board: The main function is to display board The channel information, key response, status indicator, signal strength display. Display section (including the channel number and signal strength) with dynamic scanning mode, using the 74HC164 chip interface chip to do to complete the serial transfer of data in parallel. 3 ... 8 'word-by-light LED is CPU. And will indicate the signal strength of 8 segment LED light (introduced above, where digital is to display signal strength, signal strength is quantified by the CPU will be divided into 8 and strength, and then out through the digital display) . This control is quite different, it is new. The use of keys by scanning the keyboard. Direct response from the CPU,[link widoczny dla zalogowanych], the same function is by infrared receiver remote control receiver block will send the signal into a digital clock; in response to the CPU for the unique \some pause. Software interface is simple, but sparrow d,, a fully-equipped, not only \There are games (Tetris and Sokoban), calendar and other, simple operation, the user get started quickly. As a number of low-cost machines, GSR features a 1000 is good, cost-effective, is the first choice for the majority of primary enthusiasts. o a 55 -
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