Sharp LC-40LS340E, Service Manual

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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
35
c) Pinning
㪚 㪯 㪛 㪉 㪏 㪉 㪇 㪩
O S C
P L L
T S C L K
1 0 -b it
A D C
1 2 -b it
A D C
A G C
T S IF
I2 C IF
S C L
S D A
4 1 M H z
A IN P /
A IN M
R F A IN
IF A G C /
R F A G C
T U N E R C L K
T U N E R D A T
D V B -T 2
C o r e
D V B -C
C o r e
T S V A L ID
T S S Y N C
T S E R R
T S D A T A
㪫 㫌 㫅 㪼 㫉
㪤 㪧 㪜 㪞
㪛 㪼 㪺 㫆 㪻 㪼 㫉
L D P C /
B C H
D e c o d e r
V ite r b i/
R S D e c o d e r
S tr e a m
P r o c e s s o r
T S
S m o o th in g
D V B -T
C o r e
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LC-40LS340