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: 36/71页
文件大小: 1372K
代理商: PEF3452
PEF 3452
TE3-LIU V1.3
Interface Description
Preliminary Data Sheet
26
2001-12-05
PRELIMINARY
4.1.6.3
E3 LOS Definition
Analog LOS is detected, if the signal level on pins RL1/2 drops below a fixed level (
"
B
"
)
for a certain period. Loss of signal level
"
B
"
is defined to be between 15 and 35 dB below
normal signal level
"
A
"
. If the signal exceeds 35 dB for 175 contiguous pulse periods,
analog LOS defect is indicated.
Analog LOS defect is cleared, if the signal exceeds a threshold of 15 dB below nominal
level for 175 contiguous pulse periods (10
N
255). See ITU-T G.775 for reference.
Figure 10
E3 Loss of Signal Definition
F0101 V1.2
B
A
see ITU-T G.775 page 4
L
Nominal value
M
3
Tolerance range,
"
no transition condition
"
or
"
transition
condition
"
may be declared
"
transition condition
"
must
be detected
"
no transition condition
"
must be detected
35 dB
15 dB
0 dB
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