参数资料
型号: XRT75R03IVTR
厂商: Exar Corporation
文件页数: 50/92页
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 3CH 128LQFP
标准包装: 750
类型: 线路接口装置(LIU)
驱动器/接收器数: 3/3
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: 128-LQFP
供应商设备封装: 128-LQFP(14x20)
包装: 带卷 (TR)
XRT75R03
xr
REV. 1.0.8
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
51
The jitter attenuator within the XRT75R03 meets the latest jitter attenuation specifications and/or jitter transfer
characteristics as shown in the Figure 24.
7.3.1
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.
8.0
SERIAL HOST INTERFACE:
A serial microprocessor interface is included in the XRT75R03. The interface is generic and is designed to
support the common microprocessors/microcontrollers. The XRT75R03 operates in Host mode when the
HOST/HW pin is tied “High”. The serial interface includes a serial clock (SClk), serial data input (SDI), serial
data output (SDO), chip select (CS) and interrupt output (INT). The serial interface timing is shown in Figure
11.
The active low interrupt output signal (INT pin) indicates alarm conditions like LOS, DMO and FL to the
processor.
TABLE 13: 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 25. 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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