BCM4500 Datasheet, PDF (1/2 Pages) Broadcom Corporation. – ADVANCED MODULATION SATELLITE RECEIVER

BCM4500
PRODUCT
Brief
®
ADVANCED MODULATION SATELLITE RECEIVER
BCM4500 FEATURES
• 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 IITM 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 DiSEqCTM (v2.0) transmitter and receiver}
• ^{128-pin PQFP}
• ^{3.3V I/O and analog operation}
• ^{1.8V digital operation}
SUMMARY OF BENEFITS
• 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 DiSEqCTM interface includes integrated
analog components.
L-band
Advanced Modulation Satellite Receiver Set-top Box
Memory
Conditional
Access
BCM3440
SatelliteTuner
BCM4500
Advanced Modulation
Satellite Receiver
BCM7020
HDTV MPEG-2
Transport DEMUX,
Audio/ Video
Decoder and
Display Engine
HD Video
Audio
Host CPU