- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄373010 > BCM3120 PDF資料下載
參數(shù)資料
| 型號(hào)： | BCM3120 |
| 文件頁(yè)數(shù)： | 2/2頁(yè) |
| 文件大?。?/td> | 36K |
| 代理商： | BCM3120 |
The
BCM3118B
QAMLink DVB/DAVIC Receiver with FEC is
an integrated digital transmission solution for cable modems,
cable-TV set-top boxes and digital microwave radios. Its
bandwidth-efficient feature set expands the existing potential
bandwidth of a standard analog network and provides operators
with reliable, error-free transmission. Optimized for high-
volume manufacturing, the
BCM3118B
is a highly integrated
solution that reduces the system-level chip count, the cost, and
the complexity associated with manufacturing RF receivers.
A single-chip solution, the
BCM3118B
has a 10-bit A/D
converter, a 256-QAM demodulator with square-root raised-
cosine receive filters, an adaptive equalizer with an embedded
phase recovery derotator, acquisition and tracking loops, and a
DVB/DAVIC-compliant Reed-Solomon FEC decoder with
deinterleaver. The demodulator supports QPSK, 16, 32, 64, 128
and 256-QAM formats and adapts to channels encoded at
different data rates up to 56 Mbps. The equalizer in the
BCM3118B
achieves transmission performance within 1 dB of
theory over worse-case channels with multipath delays as long as
2.4 microseconds at 5 MBaud or 1.7 microseconds at 7 MBaud
and amplitudes within .5 dB of the desired signals. With this
level of performance, the
BCM3118B
combats the effects of
channel distortions commonly found in cable-TV systems. The
BCM3118B
has an integrated A/D converter, which eliminates
the costs associated with fine tuning of external components
during high-volume production.
The
BCM3118B
samples the analog IF waveform being
delivered to
BCM3118B
by the integrated A/D converter. The
signal is then digitally mixed to baseband and filtered by dual
square-root Nyquist filters. Inter-symbol interference is then
removed by the adaptive decision feedback equalizer. Adecision
slicer, which supports constellations up to 256-QAM, formats the
equalized data. The data is then fed into a DVB/DAVIC-
compliant synchronization block, deinterleaver, Reed-Solomon
FEC, and derandomizer. The final error-corrected output is
delivered in an MPEG-2 transport format.
The
BCM3118B
can be used as a stand-alone chip or with
Broadcom's BCM3250 for a complete watch and record solution
with EuroDOCSIS. Compliant with the ITU-T J83/Annex A and
Annex C, DVB/DAVIC and the IEEE802.14 cable transmission
standards for QAM downstream, the
BCM3118B
is a universal
downstream solution for worldwide coaxial cable applications.
B C
M 3 1 1 8 B O V
E
R
V
I E
W
Phase
Recovery
and
8-tap
FFE
Deinterleaver
RAM
A_IF+/-
LPS_SYNC
JTAG [3:0]
LPS_DATA [7:0]
PS_DATA
A/D
Variable
Rate
Demod
Nyquist
a
= .13-.15
MBus/SPI
Interface
JTAG
10
RF [5:0]
cos
w
n
sin
w
n
Phase
ROM
12-tap
DFE
Q
I
Tuner
Control
LPS_CLK
MICRO [3:0]
RAM_CTRL
PS_ERR
4
4
Nyquist
a
= .13-.15
AGC_CTRL
BAUD_CTRL
IF_OSC
GEN_CTL
Reed-
Solomon
Decoder
(204, 188)
t=8
Acquisition/Tracking Loops
and Clock Generation
For more information please c ontac t us at:
Phone: 949-450-8700, FAX : 949-450-8710
Email: info@broadc om.c om
Visit our web site at: www.broadc om.c om
2001 BROADCOM CORPORATION
3118B-PB02-R-8.17.01
Broadcom
and the pulse logo
are registered trademarks of Broadcom Corporation.
QAMLink
is a trademark of Broadcom Corporation.
BROADCOM CORPORAT ION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BCM3137 | FUSE HOLD 5X20MM PCBMT |
| BCM3138 | Fuse Holder; Fuse Size/Group:5 x 20 mm; Body Material:Thermoplastic; Leaded Process Compatible:Yes; Mounting Type:PC Board Snap Mount RoHS Compliant: Yes |
| BCM3140 | IN-LINE FUSE |
| BCM3210B | CONNECTOR FUSE HOLDER THRU-HOLE |
| BCM3212 | FUSEHOLDER WICKMAN 560 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BCM3125 | 制造商:BOARDCOM 制造商全稱(chēng):Broadcom Corporation. 功能描述:UNIVERSAL TRANSMISSION SOLUTION |
| BCM3137 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:QAMLinkTM QPSK/16-QAM Burst Demodulator |
| BCM3137A3KPF | 制造商: 功能描述: 制造商:BROADC 功能描述: |
| BCM3138 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Dual Universal Advanced PHY Burst Receiver |
| BCM3140 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。