STANDARD PRODUCT
PM4328 TECT3
DATASHEET
PMC-2011596
ISSUE 1
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
Jitter Tolerance
Jitter tolerance is the maximum input phase jitter at a given jitter frequency that a
device can accept without exceeding its linear operating range, or corrupting
data. For T1 modes the DJAT input jitter tolerance is 29 Unit Intervals peak-to-
peak (UIpp) with a worst case frequency offset of 354 Hz. For E1 modes the
input jitter tolerance is 35 Unit Intervals peak-to-peak (UIpp) with a worst case
frequency offset of 308 Hz. In either mode jitter tolerance is 48 UIpp with no
frequency offset. The frequency offset is the difference between the frequency
of XCLK divided by 24 and that of the input data clock.
Figure 8: DJAT Jitter Tolerance T1 Modes
100
28
29
10
DJAT minimum
tolerance
acceptable
Jitter
Amplitude,
UIpp
1.0
0.1
unacceptable
0.2
0.01
1
10
4.9
100 0.3k
1k
10k
100k
Jitter Frequency, Hz
PROPRIETARY AND CONFIDENTIAL
73
PMC [ PMC-SIERRA, INC ]
