参数资料
型号: PEF3452
厂商: INFINEON TECHNOLOGIES AG
英文描述: Line Interface Unit for DS3, STS 1 and E3
中文描述: 线路接口单元的DS3中,STS 1和E3
文件页数: 46/71页
文件大小: 1372K
代理商: PEF3452
PEF 3452
TE3-LIU V1.3
Interface Description
Preliminary Data Sheet
36
2001-12-05
PRELIMINARY
4.4.2
Local Loop
The local loopback mode disconnects the receive lines RL1/2 from the receiver. Instead
of the signals coming from the line data provided by system interface is routed through
the analog receiver back to the framer interface. The transmit bit stream is sent to the
transmit line unchanged. If XAIS
=
1 is selected, the transmit data stream is replaced by
an all-ones signal and looped back.
Figure 17
Local Loop Signal Flow
Note: If remote loop and local loop are selected simultaneously, the device will be set
into power down mode.
Note: The jitter attenuator can be switched off optionally.
F0084
Noise
&
Crosstalk
Filter
RL1
Equalizer
RL2
Clock
&
Data
Recovery
Decoder
Local
Loop
Encoder
Jitter
Attenuator
Pulse
Shaper
Line
Driver
XL1
XL2
RDON
RDOP
RCLK
XDIN
XDIP
XCLK
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