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參數(shù)資料
| 型號： | XRT73LC00A |
| 廠商： | Exar Corporation |
| 英文描述： | E3/DS3/STS-1 LINE INTERFACE UNIT |
| 中文描述： | E3/DS3/STS-1線路接口單元 |
| 文件頁數(shù)： | 37/53頁 |
| 文件大小： | 376K |
| 代理商： | XRT73LC00A |
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XRT73LC00A
E3/DS3/STS-1 LINE INTERFACE UNIT
PRELIMINARY
REV. P1.0.0
34
line signal. Figure 23 illustrates the LOS Declaration
and Clearance behavior in response to the first loss
of signal event and then afterwards to the restoration
of the signal.
3.6.2
for DS3 and STS-1 Applications
When the XRT73LC00A is operating in the DS3 or
STS-1 Modes it declares and clears LOS based on
either:
Analog LOS (ALOS) Declaration/Clearance Criteria
or,
Digital LOS (DLOS) Declaration/Clearance Criteria
The LOS Declaration/Clearance Criteria
In the DS3 or STS-1 Modes the LOS output (RLOS)
is simply the logical OR of the ALOS and DLOS
states.
1. The Analog LOS (ALOS) Declaration/Clear-
ance Criteria
The XRT73LC00A declares an Analog LOS (ALOS)
Condition if the amplitude of the incoming line signal
drops below a specific amplitude as defined by the
state of the LOSTHR input pin.
Declaring ALOS
The XRT73LC00A declares an ALOS (Analog LOS)
condition whenever the amplitude of the input signal
falls below the Signal Level to Declare ALOS levels
specified in Table 4.
Clearing ALOS
The XRT73LC00A clears ALOS whenever the ampli-
tude of the input signal rises above the Signal Level
to Clear ALOS levels specified in Table 4.
N
OTE
:
There is approximately a 2dB hysteresis in the
received signal level that exists between declaring and
clearing ALOS in order to prevent chattering in the RLOS
output signal.
Monitoring the State of ALOS
F
IGURE
23. T
HE
B
EHAVIOR
OF
THE
LOS O
UTPUT
I
NDICATOR
I
N
R
ESPONSE
TO
THE
L
OSS
OF
S
IGNAL
AND
THE
R
ES
-
TORATION
OF
S
IGNAL
Actual Occurrence
of LOS Condition
Line Signal
is Restored
Time Range for
LOS Declaration
Time Range for
LOS Clearance
G.775
Compliance
G.775
Compliance
0 UI
10 UI
0 UI
10 UI
255 UI
255 UI
RTIP/
RRing
RLOS Output Pin
T
ABLE
4: T
HE
ALOS (A
NALOG
LOS) D
ECLARE
AND
C
LEAR
T
HRESHOLDS
FOR
A
GIVEN
SETTING
OF
LOSTHR
AND
REQEN
FOR
DS3
AND
STS-1 A
PPLICATIONS
A
PPLICATION
REQEN S
ETTING
LOSTHR S
ETTING
S
IGNAL
L
EVEL
TO
D
ECLARE
ALOS
S
IGNAL
L
EVEL
TO
C
LEAR
ALOS
DS3
1
1
<22mV
>90mV
0
1
<17mV
<70mV
STS-1
1
1
<25mV
>115mV
0
1
<20mV
<90mV
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| XRT73LC00AIV | E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73LC03A | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73LC03AIV | 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73LC04A | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
| XRT73LC04AIV | 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT73LC00A_08 | 制造商:EXAR 制造商全稱:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT |
| XRT73LC00AES | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT73LC00AIV | 功能描述:外圍驅(qū)動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT73LC00AIV-F | 功能描述:外圍驅(qū)動器與原件 - PCI 1-Ch DS3, E3, SONET RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT73LC00AIVTR | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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