Sharp LC-40LS340E, Service Manual

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LC-32LE340/343
LC-40LE340/343
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13. CI Interface
17MB70 Digital CI ve Smart Card Interface Block diagram:
14. DVB-C Demodulator
Sony CXD2820R
a) Key Features
DESCRIPTION
The Sony CXD2820R is a combined DVB-T and DVB-C demodulator that
conforms to the ETSI EN 302-755 (second generation Terrestrial) ETSI EN 300-744
(Terrestrial) and ETSI EN 300-429 (Cable) standards.
The CXD2820R is a low processor overhead. It includes a highly integrated
dual-core DVB-T and DVB-C demodulator which complies with all relevant
European performance standards.
FEATURES DVB-T2
• Supports all DVB-T2 modes, including
• Single and multiple-PLPs
• SISO and MISO transmission
• Simple API
• Fully-automatic acquisition
• Fully-automatic L1-signalling decoding
• Automatic guard-interval detection
• Automatically-calculated constant-rate TS output (using L1
signalling and ISSY)
• Acquisition range ±857kHz
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• Stream processor for automatic common- and data-PLP combination
• Null-packet insertion
• Access to channel echo profile and constellation via I2C
FEATURES DVB-C
• Wide symbol range, 0.7 to 7.2Msym/s
• Integrated matched filter 0.15 roll-off factor
• Auto Acquisition controller with fast re-acquisition mode, 15ms typ.
• Programmable acquisition range ±500kHz
• 2.8us echo cancellation at 7.2Msym/s
• Low impl. loss 0.4dB @ 64QAM and <1.0dB @ 256QAM typ.
• Enhanced channel scanning performance through improved rejection of non-digital signals
• Access to channel SNR, constellation data and dynamic equaliser tap values via I2C
APPLICATIONS
• Set Top Boxes
• IDTV with Digital only or Hybrid Tuner Support
• PC TV
• PVRs and recordable DVD players
• Test equipment
GENERAL FEATURES
• Single, 41MHz crystal (can be shared with CXD2813R analogue demod IC)
• High performance differential signal ADC
• RF power level monitor ADC
• Low IF and high IF (36MHz) mode input
• Fast 400kHz I2C compatible bus interface
• Quiet I2C interface for dedicated tuner control
• Automatic IF AGC and optional programmable
RF AGC/GPIO functions
• Configurable parallel and serial MPEG-2 TS outputs with smoothing buffer
• 3.3V, 2.5V, 1.2V supplies
• Temperature range -20°C to +85°C
• 64 pin exposed-pad LQFP 10mm x 10mm package
• Supplied with full reference design, including software driver, PCB schematic/layouts, GUI
and documentation
b) Block Diagram
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LC-40LS340