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BCM3137

PRODUCT

B C M 313 7

B C M 3 1 3 7

Brief

RECEIVER

O F

B E N E F I T S

UNIVERSAL

F E AT U R E S

BURST

S U M M A R Y

BCM3137 is a headend

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The Broadcomfor CMTS applications QPSK/QAM

burst receiver

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DOCSIS/EuroDOCSIS, IEEE 802.14, DAVIC and DVB-

compliant

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Programmable Demodulation: QPSK/16 QAM

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Variable symbol rates from 100 kBaud up

to 5.12 MBaud

front-end

gain stages and dual

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AnalogADCs, plusfeaturing dualto estimate wideband

10-bit

a 6-bit ADC

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A high-performance, integrated solution for upstream

demodulation in cable data, video and telephony

applications

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Provides full DOCSIS/EuroDOCSIS compliance for

use in Cable Modem Termination Systems (CMTS)

Access Controller (MAC)

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Seamless integration with BCM3210B CMTS Media

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Applicable to digital CATV reverse-channel receiver

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Unprecedented integration of three on-board ADCs

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Reduces overall system cost

Increases channel density per card

Simplifies RF frontend design

Enables power estimation of the entire upstream band

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channel

Fast burst acquisition: preamble size as small

as 4 bytes

Programmable components include:

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Flexible symbol demapping: Differential /

Non-Differential

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RS decoder block size (N), GF (256), T = 1 to 10

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Last RS codeword size: fixed or shortened

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23-bit derandomizer: polynomial, seed, type

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Derandomizer location: before/after RS decoder

Internal burst FIFOs for receive rate de-coupling

Choice of serial data receive interfaces

JTAG Test Interface

100-pin PQFP Package

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Improved ability to control external VGAs/PLLs

through integrated serial/parallel interface

in excess of 20 dB

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Extraordinary handling of burst-to-burst variations

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Supports random burst arrival

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Improved ability to remove channel impairments

through integration of an adaptive equalizer

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Maximum baud rate flexibility with full

programmability from 100 kBaud to 5.12 MBaud

DOCSIS/EuroDOCSIS-compliant Cable Modem Termination System Block Diagram

44 MHz IF

PA

LPF

BCM3033

QAM

Modulator

CLOCK

DATA

Pentium

PC

BCM3210B

MAC

PCI

Interface

PCI

Backbone

CLOCK

DATA

5-65 MHz

VGA

100Base-T

Ethernet

RF

Tuner

SAW

LPF

BCM3137

Burst Demod

1-8 Channels

型號(hào)

版本

描述

廠商

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BCM3137 Datasheet

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