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參數(shù)資料
| 型號： | DM9301F |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter |
| 中文描述： | 100Mbps以太網(wǎng)光纖/雙絞線收發(fā)器單芯片 |
| 文件頁數(shù)： | 12/22頁 |
| 文件大小： | 125K |
| 代理商： | DM9301F |
DM9301
100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter
12
Final
Version: DM9301-DS-F02
May 8, 2000
100Base-TX to FX Operation
The block diagram in figure 2 provides an overview of the
functional blocks contained in the TX to FX media
converter interface.
The TX to FX interface contains the following functional
blocks:
TX Digital Adaptive Equalization
TX MLT-3 to NRZI
TX Clock Recovery Module
TX NRZI to NRZ Decoder
TX Serial to Parallel Conversion
TX Descrambler
TX Code Group Alignment Monitor
FX Parallel to Serial Conversion
FX NRZ to NRZI
FX PECL Transmitter
TX Signal Detect
The signal detect function meets the specifications
mandated by the ANSI XT12 TP-PMD100Base-TX
standards for both voltage thresholds and timing
parameters.
TX Digital Adaptive Equalization
When transmitting data at high speeds over copper
twisted pair cable, attenuation based on frequency
becomes a concern. In high speed twisted pair signaling,
the frequency content of the transmitted signal can vary
greatly during normal operation based on the randomness
of the scrambled data stream. This variation in signal
attenuation caused by frequency variations must be
compensated for to ensure the integrity of the received
data. In order to ensure quality transmission when
employing MLT-3 encoding, the compensation must be
able to adapt to various cable lengths and cable types
depending on the installed environment. The selection of
long cable lengths for a given implementation, requires
significant compensation which will be over-kill in a
situation that includes shorter, less attenuating cable
lengths. Conversely, the selection of short or intermediate
cable lengths requiring less compensation will cause
serious under-compensation for longer length cables.
TX Code-
group
Alignment
Monitor
TX
Descrambler
TX
Serial to
Parallel
TX
NRZI
to
NRZ
TX
CRM
TX
MLT-3 to
NRZI
TX
Adaptive
EQ
CGM
125M TPRXCLK
25M TPRXCLK
25M
OSC/XTAL
TPRXI+/-
FX
Parallel
to Serial
TX
PECL
TXMT
PECLTXO +/-
TX Link
Status
Monitor
TX
NRZ
to
NRZI
TX to FX Block Diagram
Figure 2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DM9301FP | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter |
| DM9301J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BCD-To-Decimal Decoder |
| DM9301J/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| DM9301N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1-OF-10 DECODERS |
| DM9301W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BCD-To-Decimal Decoder |
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