參數(shù)資料
型號(hào): XRT79L74IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 4 - 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): 53/70頁
文件大?。?/td> 547K
代理商: XRT79L74IB
PRELIMINARY
XRT79L74
REV. P1.0.0
4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
51
DS3 LINE SIDE PARAMETERS
The XRT79L74 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.
Transmit Intrinsic Jitter ( with Jitter Attenuator in the Transmit path)
0.02
0.03
UI
PP
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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