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BCM3138 Datasheet(Fiches technique) 1 Page - Broadcom Corporation.

Numéro de pièce BCM3138
Description  DUAL UNIVERSAL ADVANCED TDMA PHY-LAYER BURST RECEIVER
Télécharger  2 Pages
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Fabricant  BOARDCOM [Broadcom Corporation.]
Site Internet  http://www.broadcom.com
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BCM3138
®
DUAL UNIVERSAL ADVANCED TDMA PHY-LAYER BURST RECEIVER
The BCM3138 is a universal headend advanced TDMA physical layer
QPSK/QAM burst receiver
DOCSIS/EuroDOCSIS-based, IEEE 802.14, DAVIC and DVB
compliant
Programmable demodulation including BPSK, QPSK, 8, 16, 32, 64, 128
and 256 QAM formats
Variable symbol rates from 160 Kbaud to 5.12 Mbaud providing 320
Kbps to 40 Mbps operation
Powerful Reed Solomon FEC decoder with byte deinterleave options
for impulse/burst noise mitigation
Burst acquisition as fast as 16 preamble symbols
On-board 10-bit analog-to-digital converters for each channel
Direct sampling option for DOCSIS and EuroDOCSIS via 12-bit digital
input operating at 160 MHz with LVDS or TTL level interface options
Powerful on-board equalizer provides ingress and adjacent channel
overlap protection
Integrated Fast Fourier Transform (FFT) processor with variable FFT
sizes and programmable window options
I
2C or SPI-compatible microcontroller interface
JTAG test interface
208-pin PQFP package
Operates over industrial temperature range (-40 to +85 degrees C)
Presents a high-performance, integrated solution for upstream
demodulation in cable over data, video and telephony applications.
Two independent burst receivers per package enable high-density
equipment designs, reducing equipment floor space requirements.
Based on DOCSIS/EuroDOCSIS standards for use in Cable Modem
Termination Systems (CMTS).
Seamless integration with BCM3212 Advanced CMTS MAC.
Applies to digital CATV reverse-channel receiver.
High bps/Hz modulation enables advanced digital services over
narrow RF channels.
Includes flexible analog front end options.
Use of on-board ADCs minimizes external components.
Direct sampling option via external 12-bit ADC minimizes RF
components.
On-board equalizer enables operation of digital services under
challenging plant conditions.
On-chip FFT enables spectrum analysis and management of the entire
upstream channel.
Small footprint enables high-density equipment.
Deploys advanced functions in harsh environments.
Distributed CMTS in Hybrid Fiber Coaxial Fiber Node
FE A T UR E S
SU M M A RY O F BEN E FI TS
BCM3138
Dual Adv. TDMA
Receiver
BCM3138
BCM3138
Routing/
Classification
Engine
Ethernet
System
CPU
Memory
BCM3212
Advanced
CMTS MAC
Downstream
SDRAM
(PHS,
output
queues)
BCM3034
Advanced QAM
Modulator
LPF
PA
WAN
44 MHz IF
Cable Modem Termination System (CMTS) Block Diagram




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