VESTEL 17MB12, Service Manual

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10.2 FEATURES
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MPEG1 and MPEG2-TS/PS compliant
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High performance MIPS32™ 4Kc™ main CPU core
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High performance MIPS32™ 4Km™ sub-CPU core
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Integrated DVB descrambling with family options for Irdeto and Multi2
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36 PID filters, 32 section filters
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Video Outputs: 4 DACs for RGB, Component video, S-video and composite
output with support for PAL, NTSC and SECAM
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4 graphics planes
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Audio Output: 2-channel PCM and SPDIF
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Peripherals support
ƒ two fast UARTs with 16byte FIFOs
ƒ I2C interface
ƒ infrared receiver
ƒ three wire clocked serial interface
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System timers, RTC and Watchdog timer
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Motorola/Intel Bus.
11 DRX 3973D
Fourth-Generation COFDM Demodulators
11.1 Introduction
The DRX 3973D and the DRX 3977D are fourth-generation COFDM demodulators that
offer today’s highest level of front-end integration resulting in ultimate DVB-T digital
reception, compliant to ETS 300 744, DTG D-Book, EICTA E-Book, and Nordig Unified
v1.0.2 .
The DRX 3973/77D applies cutting-edge digital filtering techniques in combination with a
high-performance A/D-converter and PLL configuration, resulting in superior
performance figures in the presence of digitaland analog adjacent channels.
Progressive channel estimator algorithms provide exceptional performance in multipath-
and dynamicecho
conditions – an especially important feature for single-frequency networks and indoor
reception.
The state-of-the-art impulsive noise cruncher suppresses interferences originating from
sources such as
cars, electrical motors, and household appliances.
11.2 Features
™ Highest level of front-end integration and flexibility:
ƒ Integrated PGA (programmable gain amplifier) 30 dB
ƒ Single 8 MHz SAW filter operation