Datasheet > BCM3137

BCM3137

更新时间： 2024-11-27 23:34:51

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
2页	42K
描述
QAMLinkTM QPSK/16-QAM Burst Demodulator

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中文翻译

获取价格

数据手册

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BCM3137 数据手册

B C M 3 1 3 7

P RODUCT

Brie f

B C M 3 1 3 7 U N I V E R S A L B U R S T R E C E I V E R

B C M 3 1 3 7 F E A T U R E S

S U M M A R Y O F B E N E F I T S

The Broadcom BCM3137 is a headend QPSK/QAM

burst receiver for CMTS applications

A high-performance, integrated solution for upstream

demodulation in cable data, video and telephony

applications

•

DOCSIS/EuroDOCSIS, IEEE 802.14, DAVIC and DVB-

compliant

Provides full DOCSIS/EuroDOCSIS compliance for

use in Cable Modem Termination Systems (CMTS)

•

Programmable Demodulation: QPSK/16 QAM

•

Variable symbol rates from 100 kBaud up

to 5.12 MBaud

Seamless integration with BCM3210B CMTS Media

Access Controller (MAC)

Analog front-end featuring dual gain stages and dual

10-bit ADCs, plus a 6-bit ADC to estimate wideband

channel

•

Applicable to digital CATV reverse-channel receiver

Unprecedented integration of three on-board ADCs

•

Fast burst acquisition: preamble size as small

as 4 bytes

Reduces overall system cost

Increases channel density per card

Simplifies RF frontend design

•

Programmable components include:

Flexible symbol demapping: Differential /

Non-Differential

Enables power estimation of the entire upstream band

•

Improved ability to control external VGAs/PLLs

through integrated serial/parallel interface

•

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

Last RS codeword size: fixed or shortened

23-bit derandomizer: polynomial, seed, type

Derandomizer location: before/after RS decoder

•

Extraordinary handling of burst-to-burst variations

in excess of 20 dB

Supports random burst arrival

•

Internal burst FIFOs for receive rate de-coupling

Choice of serial data receive interfaces

JTAG Test Interface

•

Improved ability to remove channel impairments

through integration of an adaptive equalizer

Maximum baud rate flexibility with full

programmability from 100 kBaud to 5.12 MBaud

•

100-pin PQFP Package

DOCS IS /Eu ro DOCS IS -c o m p lia n t Ca b le Mo d e m Te rm in a t io n S ys t e m Blo c k Dia g ra m

44 MHz IF

BCM3033

QAM

LPF

Modulator

Pentium

CLOCK

DATA

BCM3210B

MAC

PCI

Interface

PCI

Backbone

CLOCK

DATA

100Base-T

Ethernet

5-65 MHz

Tuner

VGA

SAW

LPF

B C M3 1 3 7

Burst Demod

1-8 Channels

中文翻译

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