BCM4500 FEATURES
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.
SUMMARY OF BENEFITS
ADVANCED MODULATION SATELLITE RECEIVER
PRODUCTPRODUCT
BriefBrief
BCM4500
•
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 (α=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
®