PXB4219E Datasheet, PDF (234/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Application Hints
SRTS Jitter Tolerance in E1 Mode
100
-50 ppm
10
0 ppm
+50 ppm
1
ITU G.823
and I.431
0,1
1
10
100
1000 10000 100000 1000000 Frequency [Hz]
Figure 44 SRTS Jitter Tolerance in E1 Mode with Jitter Attenuator
8.3.4 SRTS Jitter Tolerance in T1 Mode
The aliasing effect which is inherent to the SRTS algorithm causes the jitter tolerance at
513 Hz and all multiples of 513 Hz to be a copy of the jitter tolerance at 0 Hz. Jitter
Tolerance at low frequencies violate the requirements.
With jitter attenuator jitter tolerance at low frequencies is increased and all jitter
frequencies above 20 Hz are removed. As a result no aliasing is possible. The jitter
tolerance fulfills the requirements.
Data Sheet
234
2003-01-20