B C M 4 5 0 0 F E A T U R E S
BCM7020
HDTV MPEG-2
Transport DEMUX,
Audio/ Video
Decoder and
Display Engine
BCM3440
SatelliteTuner
Memory
Conditional
Access
HD Video
Audio
L-band
Host CPU
BCM4500
Advanced Modulation
Satellite Receiver
Advanced Modulation Satellite Receiver Set-top Box
Highly integrated solution provides universal frontend for
advanced modulation satellite systems and legacy QPSK
systems in a single package.
High-performance turbo code FEC enables 50%
throughput increase over existing satellite channels within
current link budgets within a single transponder.
Advanced design architecture requires no external RAM
for turbo FEC.
Advanced modulation receiver maintains robust
performance during low SNR operation.
Full variable rate operation from 256-kilobaud to
30-megabaud provides multiple operating points for
optimal system deployment.
Integrated microcontroller controls receiver operations
including configuration, acquisition and performance
monitoring.
Host interface operates via high-level application program
interface (API) to reduce host software development time
and to simplify system integration.
MPEG-2 or DIRECTV
output interface with PLL-
generated data clock provides glueless integration with
BCM7020 HD graphics and video subsystem.
Highly integrated DiSEqC
TM
interface includes integrated
analog components.
S U M M A R Y O F B E N E F I T S
A D VA N C E D M O D U L AT I O N S AT E L L I T E R E C E I V E R
PRODUCT
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Brief
Brief
B C M 4 5 0 0
All-digital satellite receiver
256-kilobaud to 30-megabaud variable rate receiver
Supports BPSK, QPSK, 8PSK, & 16QAM modulation
Dual integrated 7-bit A/D converters
Digital square-root Nyquist filters (
=0.2, 0.35)
All-digital clock and carrier recovery
12-tap adaptive equalizer
Advanced modulation turbo FEC decoder
High performance decoder approaches constrained capacity
theoretical limits
Supports QPSK rates 1/4, 1/2 and 3/4
8PSK flexible code rate support including 2/3, 3/4, 5/6 and 8/9
Supports 16QAM rate 3/4
No external RAM support required
Reed-Solomon decoder; t=10
Complies with DVB/DIRECTV
/Digicipher II
TM
FEC
decoder
MPEG-2 or DIRECTV
output interface with output clock
PLL
On-chip microcontroller for acquisition and tracking
On-chip BERT for BER testing
Integrated DiSEqC
TM
(v2.0) transmitter and receiver
128-pin PQFP
3.3V I/O and analog operation
1.8V digital operation
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