Motorola SB5101 - SURFboard - 30 Mbps Cable Modem Podręcznik referencyjny - Strona 7

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Motorola SB5101 - SURFboard - 30 Mbps Cable Modem Podręcznik referencyjny

4 SB5101 Architecture.

The key physical component portion of the SB5101 system is the BCM3349 chip (Broadcom). The
BCM3349 is a single-chip that supports the two advanced communication technologies required by
the DOCSIS 2.0 specification – advanced time division multiple access (A-TDMA) and
synchronous code division multiple access (S-CDMA). Other parts of the Cable Modem include a
BCM3419 Silicon Tuner, SDRAM, non-volatile storage (Flash), Ethernet interface, and USB
interface. The SB5101 provides 16 Service ID's (SIDs) rather than the 4 available with the
SB5100, this provides much greater flexibility for the provision of multiple services with individual
QoS, determined by the needs of the service, data, voice, video etc.
4.1

Technical Specifications:

Interface to PC
Data Protocol
Dimensions
Cable Interface
Modulation
Maximum Data Rate
Bandwidth
Maximum Symbol Rates
Operating Level Range
Input Impedance
Total Input Power
Frequency Range
Upstream Modulation
Maximum
Rate
Bandwidth
MOTOROLA BCS
SB5101
GENERAL
DOWNSTREAM
UPSTREAM
Upstream
Transmission
CONFIDENTIAL
SB5101 Cable Modem Overview
Ethernet
10/100-BaseT,
connector, USB
TCP/IP
15.75cmHx5.52cmW x 15.24cmL
Female F-Connector, 75 Ώ
64 or 256 QAM
27 Mbps (in 64QAM mode) or
38 Mbps (in 256QAM mode) (limited
by transmission protocol)
6 MHz
5.069 Msym/s (64QAM)
5.361 Msym/s (256QAM)
-15 to +15 dBmV
75 ohms (nomimal)
< 30 dBmV
88-860 MHz
(
30 kHz min step size)
±
16QAM or QPSK, (8, 32, 64 and 128
QAM
with
A-TDMA
enabled CMTS)
10 Mbps (30Mbps with A-TDMA or S-
CDMA enabled CMTS)
200, 400, 800, 1.6 MHz, 3.2 MHz;
RJ-45
or
S-CDMA
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