PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Figure 12 – TJAT Minimum Jitter Tolerance vs. XCLK Accuracy
70
68
66
65
JAT MIN.
JITTER
TOLERANCE,
UI pp
61
60
55
MAX. FREQUENCY
100
200
0
250
32
300
354
Hz
OFFSET
XCLK ACCURACY
100 ,± ppm
Jitter Transfer
For T1 applications, the output jitter for jitter frequencies from 0 to 5.7 Hz (7.6 Hz for E1) is no
more than 0.1 dB greater than the input jitter, excluding residual jitter. Jitter frequencies above
5.7 Hz (7.6 Hz for E1) are attenuated at a level of 6 dB per octave, as shown in Figure 13. The
figure is valid for the case where the N1 = 2FH in the TJAT Jitter Attenuator Divider N1 Control
register and N2 = 2FH in the TJAT Divider N2 Control register.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
42
PMC [ PMC-SIERRA, INC ]
