参数资料
型号: XRT91L32IQ-F
厂商: Exar Corporation
文件页数: 27/37页
文件大小: 0K
描述: IC TXRX SONET/SDH 8BIT 100QFP
标准包装: 20
类型: 收发器
规程: SONET/SDH
电源电压: 3.3V
安装类型: 表面贴装
封装/外壳: 100-BQFP
供应商设备封装: 100-QFP(14x20)
包装: 托盘
其它名称: 1016-1489
XRT91L32IQ-F-ND
xr
XRT91L32
REV. 1.0.3
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
31
4.6.2
Jitter Generation
Jitter generation is defined as the amount of jitter at the STS-N output in the absence of applied input jitter. The
Bellcore and ITU requirement for this type jitter is 0.01UI rms measured with a specific band-pass filter.
For more information on these specifications refer to Bellcore TR-NWT-000253 sections 5.6.2-5 and GR-253-
CORE section 5.6.
Phase noise plot shows the power of the noise with respect to the carrier power. When this curve is integrated
in the frequency band of interest, the outcome is the noise power. Jitter generation in rms is then derived by
factoring with the appropriate period for the clock cycle.
FIGURE 25. XRT91L32 MEASURED ELECTRICAL PHASE NOISE TRANSMIT JITTER GENERATION AT 622.08 MBPS
STS-12/STM4 USING ’1010’ OUTPUT PATTERN
Phase Noise Transmit Jitter Generation
(Wide Band) using HP8560E
-120
-115
-110
-105
-100
-95
-90
1
10
100
1000
10000
100000
Frequency (kHz)
dB
C
/H
z
REFCLK = 19.44 MHz
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