XRT75L03DIV View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

XRT75L03DIV

THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

Exar Corporation 

áç

XRT75L03D

THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.0

FIGURE 22. INPUT JITTER TOLERANCE FOR DS3/STS-1

64

41

15

10

5

1 .5

0 .3

0 .1 5

0 .1

G R-253 STS-1

G R-499 Cat II

G R-499 Cat I

XRT75L03D

0 .0 1

0 .0 3

0 .3

2

JITTER FRE Q UE N CY (kHz)

20

100

6.1.2 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.

FIGURE 23. INPUT JITTER TOLERANCE FOR E3

ITU -T G .823

64

XRT75L03D

10

1.5

0.3

0.1

1

10

800

JITTER FR EQ UENCY (kHz)

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.

50

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