参数资料
型号: XRT75R12DIB
厂商: Exar Corporation
文件页数: 62/133页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 12CH 420TBGA
标准包装: 40
类型: 线路接口装置(LIU)
驱动器/接收器数: 12/12
规程: DS3,E3,STS-1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 420-LBGA 裸露焊盘
供应商设备封装: 420-TBGA(35x35)
包装: 托盘
XRT75R12D
30
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
REV. 1.0.3
The jitter attenuator within the XRT75R12D meets the latest jitter attenuation specifications and/or jitter
transfer characteristics as shown in the Figure 16.
4.3.1
JITTER GENERATION
Jitter Generation is defined as the process whereby jitter appears at the output port of the digital equipment in
the absence of applied input jitter. Jitter Generation is measured by sending jitter free data to the clock and
data recovery circuit and measuring the amount of jitter on the output clock or the re-timed data. Since this is
essentially a noise measurement, it requires a definition of bandwidth to be meaningful. The bandwidth is set
according to the data rate. In general, the jitter is measured over a band of frequencies.
TABLE 7: JITTER TRANSFER PASS MASKS
RATE
(KBITS)
MASK
F1
(HZ)
F2
(HZ)
F3
(HZ)
F4
(KHZ)
A1(dB)
A2(dB)
34368
G.823
ETSI-TBR-24
100
300
3K
800K
0.5
-19.5
44736
GR-499, Cat I
GR-499, Cat II
GR-253 CORE
10
10k
56.6k
40
-
15k
300k
15k
0.1
-
51840
GR-253 CORE
10
40k
-
400k
0.1
-
FIGURE 16. JITTER TRANSFER REQUIREMENTS AND JITTER ATTENUATOR PERFORMANCE
F 1
A 1
F 2
J
IT
T
E
R
A
M
P
L
IT
U
D
E
J IT T E R F R E Q U E N C Y (k H z )
A 2
F 3
F 4
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