PXB4219E Datasheet, PDF (233/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Application Hints
8.3.3 SRTS Jitter Tolerance in E1 Mode
The aliasing effect which is inherent to the SRTS algorithm causes the jitter tolerance at
681 Hz and all multiples of 681 Hz to be a copy of the jitter tolerance at 0 Hz.
The jitter tolerance of the bare device meets the requirements of ITU-T G.823 and I.431
only at medium and low frequencies. At high frequencies it is lower than the
requirements.
In combination with an jitter attenuator the tolerance at high frequencies is better than
0.2 UI. All requirements are met.
100,0
SRTS Jitter Tolerance in E1 Mode
-50 ppm
10,0
0 ppm
+50 ppm
1,0
0,1
1
Figure 43
ITU G.823
and I.431
10
100 1000 10000 100000 1000000 Freqency [Hz]
SRTS Jitter Tolerance in E1 Mode without Jitter Attenuator
Data Sheet
233
2003-01-20