參數(shù)資料
型號： VES1848
廠商： NXP SEMICONDUCTORS
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Single Chip DAVIC/DVB-RC Cable Modem(單片DAVIC/DVB-RC電纜調(diào)制解調(diào)器)
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP208
封裝： MQFP-208
文件頁數(shù)： 3/20頁
文件大?。?/td> 122K
代理商： VES1848
1999 Jul 01
3
Philips Semiconductors
Product specification
Single Chip DAVIC/DVB-RC Cable Modem
VES1848
1 GENERAL DESCRIPTION
FIGURE 1 : FUNCTIONAL BLOCK DIAGRAM
interface
application layers
interface
MAC
Up Stream
synchronisation
external
synchro
channel processing
Out Of Band
DQPSK
demodulator
ADC
IF
fixed
QPSK / 16QAM
burst modulator
DAC
Q
Up Stream
channel encoding
programmable
IF or I
In Band
channel processing
symbol clock
MPEG2-TS
1.1 ABREVIATIONS
AGC
BW
CRC
DS
HE
HEC
IB
IF
NIU
OOB
PWM
SL-ESF
STB
US
UW
Automatic Gain Control
Bandwidth
Cyclic Redundancy Checking (type of error correction code)
Down Stream (from the Headend to the set-top box)
Headend
Header Error Control (CRC of the ATM cell header)
In Band
Intermediate Frequency
Network Interface Unit (physical and MAC layers of the STB)
Out Of Band
Pulse Wave Modulation
Signalling Link Extended SuperFrame (name of the OOB frame)
Set-Top Box
Up Stream (from the set-top box to the headend)
Unique Word (=preamble)
1.2 NOTATION
References to programmation registers are done this way :
AD.7 = bit 7 (in decimal) of the register located at the address AD (in hexa).
AD.[7-5] = bits 7 down to 5 of the register located at the address AD.
1.3 FUNCTIONAL DESCRIPTION
ADC
The VES 1848 implements a 7-bit analog to digital converter. It directly samples the OOB IF signal. The IF value
can be chosen by the system designer.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VES1993 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SINGLE CHIP SATELLITE CHANNEL RECEIVER
VES-220M0JTR-0405 功能描述:鋁質(zhì)電解電容器-SMD 6.3 Volts 22uF 20% 4x5.3 RoHS:否 制造商:Vishay/BC Components 電容:2200 uF 容差:20 % 電壓額定值:16 V ESR: 工作溫度范圍:- 55 C to + 150 C 尺寸:16 mm W x 16 mm L x 21 mm H 產(chǎn)品:High Temp Electrolytic Capacitors
VES-220M1ATR-0505 功能描述:鋁質(zhì)電解電容器-SMD 10 Volts 22uF 20% 5x5.3 RoHS:否 制造商:Vishay/BC Components 電容:2200 uF 容差:20 % 電壓額定值:16 V ESR: 工作溫度范圍:- 55 C to + 150 C 尺寸:16 mm W x 16 mm L x 21 mm H 產(chǎn)品:High Temp Electrolytic Capacitors
VES-220M1CTR-0505 功能描述:鋁質(zhì)電解電容器-SMD 16 Volts 22uF 20% 5x5.3 RoHS:否 制造商:Vishay/BC Components 電容:2200 uF 容差:20 % 電壓額定值:16 V ESR: 工作溫度范圍:- 55 C to + 150 C 尺寸:16 mm W x 16 mm L x 21 mm H 產(chǎn)品:High Temp Electrolytic Capacitors
VES-220M1ETR-0605 功能描述:鋁質(zhì)電解電容器-SMD 25 Volts 22uF 20% 6.3x5.3 RoHS:否 制造商:Vishay/BC Components 電容:2200 uF 容差:20 % 電壓額定值:16 V ESR: 工作溫度范圍:- 55 C to + 150 C 尺寸:16 mm W x 16 mm L x 21 mm H 產(chǎn)品:High Temp Electrolytic Capacitors
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