參數(shù)資料
型號(hào): XRT73L02M
廠商: Exar Corporation
英文描述: TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述: 雙通道E3/DS3/STS-1線路接口單元
文件頁(yè)數(shù): 31/46頁(yè)
文件大?。?/td> 391K
代理商: XRT73L02M
xr
XRT73L02M
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.0
RLOS is the logical OR of the DLOS and ALOS states. When the RLOS condition occurs the RLOS_n output
pin is toggled “High” and the RLOS_n bit is set to “1” in the status control register.
29
D
ISABLING
ALOS/DLOS D
ETECTION
:
For debugging purposes it is useful to disable the ALOS and/or DLOS detection. Setting both ALOSDIS_n and
DLOSDIS_n bits disables the LOS detection on a per channel basis.
5.0.4.2
If the level of incoming line signal drops below the threshold as described in the ITU-T G.775 standard, the
LOS condition is detected. Loss of signal level is defined to be between 15 and 35 dB below the normal level. If
the signal drops below 35 dB for 175 ± 75 consecutive pulse periods, LOS condition is declared. This is illus-
trated in Figure 19.
E3 LOS Condition:
T
ABLE
10: T
HE
ALOS (A
NALOG
LOS) D
ECLARATION
AND
C
LEARANCE
T
HRESHOLDS
FOR
A
GIVEN
SETTING
OF
REQEN (DS3
AND
STS-1 A
PPLICATIONS
)
A
PPLICATION
REQEN S
ETTING
S
IGNAL
L
EVEL
TO
D
ECLARE
ALOS S
IGNAL
L
EVEL
TO
C
LEAR
ALOS
DS3
0
1
0
1
<17 mV
<20 mV
<20 mV
<25 mV
>70 mV
>90 mV
>90 mV
>115 mV
STS-1
F
IGURE
19. L
OSS
O
F
S
IGNAL
D
EFINITION
FOR
E3
AS
PER
ITU-T G.775
0 dB
-12 dB
-15dB
-35dB
Maximum Cable Loss for E3
LOS Signal Must be Declared
LOS Signal Must be Cleared
LOS Signal may be Cleared or Declared
相關(guān)PDF資料
PDF描述
XRT73L02MIV TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03AIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03B 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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