XRT73R12_07 Datasheet, PDF (41/89 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

REV. 1.0.2
XRT73R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
FIGURE 26. INPUT JITTER TOLERANCE FOR DS3/STS-1
64
41
15
10
5
1.5
0.3
0.15
0.1
GR-253 STS-1
GR-499 Cat II
GR-499 Cat I
XRT73R12
0.01
0.03
0.3
2
JITTER FREQUENCY (kHz)
20
100
5.1.2 E3 Jitter Tolerance Requirements
ITU-T G.823 standard specifies that the clock and data recovery unit must be able to tolerate jitter up to certain
specified limits. Figure 27 shows the tolerance curve.
FIGURE 27. INPUT JITTER TOLERANCE FOR E3
ITU-T G.823
64
XRT73R12
10
1.5
0.3
0.1
1
10
800
JITTER FREQUENCY (kHz)
As shown in the Figures 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. Table 10 below shows the jitter amplitude
versus the modulation frequency for various standards.
38