Toshiba 24W33B, Руководство по обслуживанию

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MSP 34XXG
General description:
The MSP 34xxG family of single-chip Multi-standard Sound Processors covers the sound processing of all analog
TV standards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with
analog sound IF signal-in, down to processed analog AF-out, is performed on a single chip.
Two-carrier FM systems according to the German or Korean terrestrial specs or the satellite specs can be processed
with the MSP 34x0G. Digital demodulation and decoding of NICAM-coded TV stereo sound, is done only by the
MSP 3410G. The MSP 34x0G offers a powerful feature to calculate the carrier field strength, which can be used for
automatic standard detection (terrestrial) and search algorithms (satellite).
The MSP 3411G has all functions of the MSP34x0G with the addition of a virtual surround sound feature. Surround
sound can be reproduced to a certain extent with two loudspeakers. The MSP3411G includes our virtualizer algorithm
“3D-PANORAMA” which has been approved by the Dolby Laboratories for compliance with the “Virtual Dolby Surround”
technology. In addition, the MSP 34x1G includes our “PANORAMA” algorithm. The MSP34x1G has built-in automatic
functions: The IC is able to detect the actual sound standard automatically (Automatic Standard Detection).
Furthermore, pilot levels and identification signals can be evaluated internally with subsequent switching between
mono/ stereo/ bilingual; no I
2
C interaction is necessary (Automatic Sound Selection).
General Features
• Two selectable analog inputs (TV and SAT-IF sources)
• Automatic Gain Control (AGC) for analog IF input. Input range: 0.10–3 V pp
• Integrated A/D converter for sound-IF inputs
• All demodulation and filtering is performed on chip and is individually programmable
• Easy realization of all digital NICAM standards (B/G, D/K, I & L) with MSP 3410G.
• FM demodulation of all terrestrial standards (incl. identification decoding)
• FM demodulation of all satellite standards
• No external filter hardware is required
• Only one crystal clock (18.432 MHz) is necessary
• FM carrier level calculation for automatic search algorithms and carrier mute function
• Subwoofer output with on-chip programmable low-pass and complementary high-pass filters
DSP Section (Audio Base band Processing)
• Flexible selection of audio sources to be processed
• Two digital input and one output interface via I 2 S bus for external DSP processors, featuring surround sound, ADR etc.
• Digital interface to process ADR (ASTRA Digital Radio) together with DRP 3510A
• Performance of all de-emphasis systems including adaptive Wegener Panda1 without external components or controlling
• Digitally performed FM identification decoding and de-matrixing
• Digital base-band processing: volume, bass, treble, 5-band equalizer, loudness, pseudo-stereo, and base-width enlargement
· Simple controlling of volume, bass, treble, equalizer etc.
Analog Section
• four selectable analog pairs of audio base-band inputs (= four SCART inputs) input level: =<2 V RMS,
input impedance: >=25 kW
• one analog mono input (i.e. AM sound): input level: =<2 V RMS , input impedance: >=15 kW
• two high-quality A/D converters, S/N-Ratio: >=85 dB
• 20 Hz to 20 kHz bandwidth for SCART-to-SCART copy facilities
24CO8
General description:
The 24C16 is a 8Kbit electrically erasable programmable memory (EEPROM), organized as 4 blocks of 256 * 08 bits.
The memory operates with a power supply value as low as 2.5V.
Features:
• Minimum 1 million ERASE/WRITE cycles with over 10 years data retention
• Single supply voltage:4.5 to 5.5V
• Two wire serial interface, fully I²C-bus compatible
• Byte and Multi-byte write (up to 8 bytes)
• Page write (up to 16 bytes)
• Byte, random and sequential read modes
• Self timed programming cycle