CX28331/CX28332/CX28333
2.0 Functional Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
2.4 Jitter Tolerance
2.4 Jitter Tolerance
The CX2833i receiver is able to tolerate a specified amount of high-frequency
jitter in the received signal while providing error-free operation (generally
defined as a bit error rate of less than 10-9). The specifications (illustrated in
Figure 2-9) for jitter tolerance are discussed in the following documents:
•
E3 rate – ITU-T G.823 and ETSI TBR24 contain frequency masks for input
jitter tolerance.
NOTE: To meet jitter transfer requirements for loop-timed operation, an external
jitter attenuator is required. The jitter attenuator lessens jitter from the
receive clock.
•
DS3 rate – ITU-T G.823 and Bellcore GR499 specify jitter tolerance
frequency masks for Category I and Category II interfaces.
•
STS-1 rate – Bellcore GR253 specifies a jitter tolerance. It is noted that the
STS-1 jitter tolerance differs from DS3 requirements only for Category II
interfaces.
100985A
Conexant
2-13
CONEXANT [ CONEXANT SYSTEMS, INC ]
