Sharp LC-19LE430E, Руководство по обслуживанию

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2008-03-14
LC-19LE430E/UK, LC-22LE430E/UK, LC-26LE430E/UK, LC-32LE430E/UK
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MT5135AE is an integrated channel demodulator for European TV solutions. It provides high performance DVB-T and DVB-C demodulation function with
low overall costs. The integrated SAW filter technology eliminates the need for on-board SAW filters and VGAs, resulting in a lower BOM cost and a more
compact PCB design. The integrated CI+ controller and interface also reduce the complexity of TS routing.
The integrated DVB-T and DVB-C demodulators fully comply with the related ETSI and ITU standards. They meet performance requirements of NorDig
nified, C-Book, and D-Book. A high-performance analog front-end, consisting of a PGA and a 10-bit ADC preceding the digital data path, can accept the
IF or low-IF signal inputs directly from RF can tuners or silicon tuners. The digital data path realizes a set of refined algorithms to achieve quality
demodulation under varying channel conditions and impairments. An on-chip micro-processor controls the robust acquisition flow for both DVB-T and
DVB-C demodulators, and thus enables MT5135AE to successfully lock on the desired TV channel with a high carrier frequency offset (CFO) or timing
frequency offset (TFO). In addition proprietary mechanisms are incorporated to speed up the channel scan. They include the automatic mode detection
for DVB-T, and the automatic symbol rate and modulation type detection for DVB-C.
With MT5135AE, the cost and system complexity of a TV can be significantly reduced. Taking advantage of the integrated SAW filter technology, the
SAW filter together with the accompanying VGA, conventionally found on board or inside a NIM, can be spared. This solution calls for a simple RF tuner
directly feeding the IF inputs of MT5135AE, leaving a lean PCB design with a smaller component count and a lower BOM cost as well. Furthermore,
MT5135AE provides an integrated CI+ controller with the complete complementing interfaces among the CAM, the main decoder chip, and an additional
demodulator chip. When not in use, these interfaces can be set to hi-impedance mode to support multiple demodulators or multiple CAMs operation. With
the highly flexible CI+ controller and interfaces, MT5135AE effectively addresses the TS routing complexity for the application scenarios such as
simultaneous PVR recording and playback, or time-shift playback. The need for on-board TS multiplexers is eliminated and the PCB layout can be kept as
compact as possible.
GENERAL FEATURE LIST
Overall Features
■ Integrated DVB-T and DVB-C demodulators
■ Integrated CI/CI+ controller and interface
■ On-chip integrated SAW filter function for lower BOM cost
■ On-chip high-performance PGA and 10-bit ADC accepting IF or low-IF inputs
■ RSSI measurement
■ Independent RF and IF AGC controls
■ On-chip micro-processor for acquisition control
■ Good CAM compatibility
■ One parallel or serial TS interface accepting outputs from other demodulator chips
■ TS interfaces supporting instant playback and PVR recording and playback
■ SPI for host communication
■ On-chip SIF master for tuner control
■ Low power consumption: less than 200 mW
■ LQFP-128 14 x 14 mm2 package
DVB-T Demodulator Features
■ ETSI 300 744 & NorDig Unified compliant
■ Excellent performance for SFN & Indoor reception
■ Supporting 2k and 8k modes
■ Supporting QPSK,16-, and 64-QAM constellations
■ Supporting 1/4, 1/8, 1/16, and 1/32 guard intervals
■ Supporting hierarchical & non-hierarchical modes
■ Accepting 6,7,8 MHz channel bandwidth
■ Automatic mode detection
■ Full-digital timing/frequency with wide acquisition range
■ Support triple offset
■ Excellent adjacent channel interference (ACI) rejection capability
■ Excellent co-channel interference (CCI) rejection capability
■ Fast channel lock time
DVB-C Demodulator Features
■ ETSI 300 429, ITU J.83 Annex A, NorDig Unified, and C-Book compliant