XRT73L02M Datasheet, PDF (34/46 Pages) Exar Corporation – TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT73L02M
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
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REV. 1.0.0
6.0.1.2 E3 Jitter Tolerance Requirements:
ITU-T G.823 standard specifies that the clock and data recovery unit must be able to accommodate and toler-
ate jitter up to certain specified limits. Figure 23 shows the tolerance curve.
FIGURE 23. INPUT JITTER TOLERANCE FOR E3
ITU-T G.823
64
XRT73L02M
10
1.5
0.3
0.1
1
10
800
JITTER FREQUENCY (kHz)
As shown in the Figures 22 and 23 above, in the jitter tolerance measurement, the dark line indicates the mini-
mum 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.
TABLE 11: JITTER AMPLITUDE VERSUS MODULATION FREQUENCY (JITTER TOLERANCE)
BIT RATE
(KB/S)
STANDARD
INPUT JITTER AMPLITUDE (UI _P-P)
A1
A2
A3
F1(HZ)
MODULATION FREQUENCY
F2(HZ) F3(KHZ) F4(KHZ) F5(KHZ)
34368 ITU-T G.823 1.5
0.15
-
100
1000
10
800
-
44736
GR-499
5
0.1
-
10
2.3k
60
300
-
CORE Cat I
44736
GR-499
10
0.3
-
10
669
22.3
300
-
CORE Cat II
51840
GR-253
15
1.5
0.15
10
30
300
2
20
CORE Cat II
6.0.2 JITTER TRANSFER - RECEIVER/TRANSMITTER:
Jitter Transfer function is defined as the ratio of jitter on the output relative to the jitter applied on the input ver-
sus frequency.
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