PEF3452 Datasheet, PDF (36/71 Pages) Infineon Technologies AG – Line Interface Unit for DS3, STS 1 and E3

PEF 3452
TE3-LIU V1.3
PRELIMINARY
Interface Description
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.
A
see ITU-T G.775 page 4
0 dB
B
Nominal value
15 dB
35 dB
Tolerance range, "no transition condition" or "transition
condition" may be declared
Figure 10 E3 Loss of Signal Definition
"transition condition" must
be detected
"no transition condition"
must be detected
F0101 V1.2
Preliminary Data Sheet
26
2001-12-05