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| 型號： | PONE-000-01 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | The ideal device for simple nodes, such as switches, actuators and sensor |
| 中文描述： | 在簡單的節(jié)點(diǎn)，如交換機(jī)，執(zhí)行器和傳感器的理想設(shè)備 |
| 文件頁數(shù)： | 7/56頁 |
| 文件大小： | 432K |
| 代理商： | PONE-000-01 |
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March 2000
CEWay
PL-One Data Sheet
D-CW-0100-04
Page 7 of 56
CEBus Standard Implementation
The CEWay PL-One fully implements the CEBus Standard power line Physical Layer (PhyL) using
dedicated circuitry. The Physical Layer is composed of a Medium Dependant Physical Sublayer (MDPS)
and of a Power Line Symbol Encoding Sublayer (PLSES). It also provides an M8052 core microcontroller
on-chip with which the upper layers (DLL, NL, and AL) of the CEBus standard or Home Plug & Play
specification can be run. Libraries that implement these upper layers are available in CEBox, the
DOMOSYS’ software system.
Medium Dependent Physical Sublayer & Power Line Symbol Encoding Sublayer
The transceiver (MDPS and PLSES) is composed of a transmit chain and a receive chain. The transmitter
provides an analog representation of a stored ROM code to an off-chip amplifier for transmission. Upon
reception, the device samples the incoming filtered waveform through an ADC and provides a bit-by-bit
comparison with an internally stored set of waveform probabilities. When a digital threshold is exceeded,
the bit is stored with the rest of the message.
The symbol decoder performs leading zero suppression and recognizes the Preamble EOF (PEOF) string
in order to force the device into the receive state. The symbol decoder recognizes the incoming signals
from the transversal filter and prepares them for storage in RAM.
The MDPS and PLSES embed a part of the Layer System Management (LSM).
Detailed information on the CEBus Power Line Physical Layer can be found in the following documents:
EIA 600.31
IS 60.03 parts 7 & 8
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