BCM4500_03 Datasheet, PDF (1/2 Pages) Broadcom Corporation. – ADVANCED MODULATION SATELLITE RECEIVER

BCM4500
®
ADVANCED MODULATION SATELLITE RECEIVER
FEATURES
SUMMARY OF BENEFITS
• ^{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 (a=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}
• 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.
Advanced Modulation Satellite Receiver Set-Top Box
Memory
Conditional
Access
L-band
BCM3440
SatelliteTuner
BCM4500
Advanced Modulation
Satellite Receiver
BCM7020
HDTV MPEG-2
Transport DEMUX,
Audio/ Video
Decoder and
Display Engine
HD Video
Audio
Host CPU