參數(shù)資料
型號: XRT79L72IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
中文描述: ATM NETWORK INTERFACE, PBGA456
封裝: 27 X 27 MM, 1 MM PITCH, PLASTIC, BGA-456
文件頁數(shù): 55/72頁
文件大?。?/td> 441K
代理商: XRT79L72IB
xr
2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
PRELIMINARY
XRT79L72
REV. P1.0.2
52
DS3 LINE SIDE PARAMETERS
The XRT79L72 will output pulses that comply with the Isolated DSX-3 Pulse Template requirements per
Bellcore GR-499-CORE. The pulse mask as specified in Bellcore GR-499-CORE is shown below in Figure 9.
Additionally, the Equations that define both the "Upper" and "Lower" curves of the Pulse Template requirement
is presented below in Table 6.
R
ECEIVER
LINE
SIDE
INPUT
CHARACTERISTICS
Receiver Sensitivity (length of cable)
900
1200
feet
Interference Margin
-20
-14
dB
Jitter Tolerance @ Jitter Frequency 800KHz
0.15
0.28
UI
PP
Signal level to Declare Loss of Signal
-35
dB
Signal Level to Clear Loss of Signal
-15
dB
Occurence of LOS to LOS Declaration Time
10
255
UI
Termination of LOS to LOS Clearance Time
10
255
UI
F
IGURE
9. B
ELLCORE
GR-499-CORE P
ULSE
T
EMPLATE
R
EQUIREMENTS
FOR
DS3 A
PPLICATIONS
T
ABLE
5: E3 T
RANSMITTER
LINE
SIDE
OUTPUT
AND
RECEIVER
LINE
SIDE
INPUT
SPECIFICATIONS
PARAMETER
MIN
TYP
MAX
UNITS
DS3 Pulse Template
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
-1
-09
-08
-07
-06
-05
-04
-03
-02
-01
0
01
02
03
04
05
06
07
08
09
1
11
12
13
14
Time, in UI
N
Lower Curve
Upper Curve
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