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參數(shù)資料
| 型號： | AR-P48 |
| 廠商： | Conexant Systems, Inc. |
| 英文描述： | ER 48C 48#16 SKT RECP |
| 中文描述： | AccessRunner ADSL調制解調器的PCI設備的應用設置 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 159K |
| 代理商： | AR-P48 |
AccessRunner
Controller-less ADSL Modem Device Set for PCI Applications
4
Conexant
Proprietary Information
Doc. No. 100394B
October 19, 1999
Digital Interface (DI)
The DI Transmit Block performs the following
functions: transmit data multiplexing and buffering,
fast and interleave data stream framing, transmit
data synchronization control, eoc/aoc insertion, CRC
encoding, scrambling, FEC encoding, and data
interleaving.
The DI Receive Block performs the following
functions: data de-interleaving, FEC decoding,
descrambling, CRC check, receive data
synchronization and receive clock generation,
demultiplexing and buffering of receive data and
receive eoc/aoc.
QAM Encoder/Decoder
The QAM Encoder/Decoder performs the following
functions: constellation encoding, clock recovery,
receive gain compensation, frequency domain
equalization (FEQ), slicing, and constellation
decoding. The block also performs other functions
like frequency domain signal processing, signal
power, error power averaging and computations
related to frequency domain training.
FFT
The FFT performs IFFT for modulation of the
transmit symbol, and FFT for demodulation of the
receive symbol.
Analog Front End (AFE) Interface
The AFE Interface performs the following functions:
transmit signal filtering, time domain equalization,
and time domain signal power averaging, and echo
cancellation (EC).
Microcontroller Interface
The microcontroller interface enables the host
computer via the PCI controller to set parameters to
control DSP sequencing and to read/write
coefficients or data.
20441 Line Driver
The 20441 line driver is designed for use in full-rate
and G.lite (G.992.2) ADSL modems. It is optimized
for ideal ADSL performance providing low noise,
high bandwidth, and superior linearity. The 20441
line driver transmits a DMT modulated signal in the
25
–
132 kHz band. It operates from a single 5V
±
TBD% supply, refer to
Figure 3.
The driver is optimized for ADSL performance: it has
a very low noise figure, high bandwidth and good
linearity.
(
Current Control
Block
Line Driver
(20441)
+
+
+
248.4
248.4
400
OUTP_DRV
OUTM_DRV
INP_DRV
INM_DRV
RBIAS
DSL015_003
Figure 3. AccessRunner 20441 Line Driver
相關PDF資料 |
PDF描述 |
|---|---|
| AR-20441-11 | Circular Connector; No. of Contacts:15; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:28; Circular Contact Gender:Pin; Circular Shell Style:Cable Receptacle; Insert Arrangement:28-17 RoHS Compliant: No |
| AR-20441-12 | Circular Connector; No. of Contacts:12; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:28; Circular Contact Gender:Pin; Circular Shell Style:Cable Receptacle; Insert Arrangement:28-18 RoHS Compliant: No |
| AR1F3P | Circular Connector; MIL SPEC:MIL-C-5015 A/B/C; Body Material:Metal; Series:MS3101A; No. of Contacts:3; Connector Shell Size:28; Connecting Termination:Solder; Circular Shell Style:Cable Receptacle; Body Style:Straight RoHS Compliant: No |
| AR1L2Q | ER 9C 9#8 SKT RECP LINE |
| AR1L3N | AB 12C 6#12 6#16 PIN CBL RECEP |
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