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XRT75R03D Datasheet(PDF) 54 Page - Exar Corporation |
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XRT75R03D Datasheet(HTML) 54 Page - Exar Corporation |
54 / 135 page XRT75R03D 50 THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER REV. 1.0.4 7.1.2 E3 Jitter Tolerance Requirements: ITU-T G.823 standard specifies that the clock and data recovery unit must be able to accommodate and tolerate jitter up to certain specified limits. Figure 23 shows the tolerance curve. As shown in the Figures 22 and 23 above, in the jitter tolerance measurement, the dark line indicates the minimum level of jitter that the E3/DS3/STS-1 compliant component must tolerate. The Table 11 below shows the jitter amplitude versus the modulation frequency for various standards. FIGURE 23. INPUT JITTER TOLERANCE FOR DS3/STS-1 FIGURE 24. INPUT JITTER TOLERANCE FOR E3 0.01 0.03 15 1.5 0.3 2 20 0.15 JITTER FREQUENCY (kHz) 10 5 0.3 100 0.1 GR-253 STS-1 GR-499 Cat II GR-499 Cat I 64 41 XRT75VL03D 0.1 1.5 1 10 JITTER FREQUENCY (kHz) 800 ITU-T G.823 64 10 0.3 XRT75VL03D |
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