Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
MSP34×0G
Multistandard Sound Processor Family
Release Note: Revision bars indicate significant
changes to the previous edition. The hardware
and software description in this document is
valid for the MSP 34×0G version B5 and
following versions.
1. Introduction
The MSP34×0G family of single-chip
Multistandard 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. Figure 13 shows a
simplified functional block diagram of the MSP
34×0G.
This new generation of TV sound processing
ICs now includes versions for processing the
multichannel television sound (MTS) signal
conforming to the standard recommended by the
Broadcast Television Systems Committee
(BTSC). The DBX noise reduction, or
alternatively MICRONAS Noise Reduction
(MNR) is performed alignment free
Other processed standards are the Japanese
FM-FM multiplex standard (EIA-J) and the
FM Stereo Radio standard.
Current ICs have to perform adjustment
procedures in order to achieve good stereo
separation for BTSC and EIA-J.
The MSP 34×0G has optimum stereo
performance without any adjustments.
All MSP 34×0G versions are pin and
software downward-compatible to the
MSP 34×0D. The MSP34×0G further simplifies
controlling software. Standard selection
requires a single I
2
C transmission only.
The MSP 34×0G 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).
The ICs are produced in submicron CMOS
technology.
The MSP34×0G is available in the following
packages: PLCC68, PSDIP64, PSDIP52
PQFP80 and PLQFP64.
2. Block Diagram
Fig. 13 Simplified Functional Block Diagram of the MSP 34×0G
3. Refer to Table 10 about Functions and Service Data of MSP 34X0G
s Each Pin.
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