PXB4219 Datasheet, PDF (239/290 Pages) Infineon Technologies AG – IWE8 Interworking Element for 8 E1/T1 Lines

PXB4219 / PXB4220 / PXB4221
Application Hints
8.3.7 SRTS Jitter Transfer in E1 Mode
The aliasing effect which is inherent to the SRTS algorithm causes the jitter transfer at
681 Hz and all multiples of 681 Hz to be a copy of the jitter transfer at 0 Hz. This violates
the requirements.
The jitter attenuator removes jitter frequencies above 20 Hz. There is no aliasing and the
requirements are met.
10,0
0,0
0,01
-10,0
-20,0
SRTS Jitter Transfer in E1 Mode
0,1
1
10
100
1000
-50 ppm
0 ppm
-30,0
-40,0
-50,0
-60,0
Frequency [Hz]
+50 ppm
ITU G.735
and I.431
Figure 51 SRTS Jitter Transfer in E1 Mode without Jitter Attenuator
Data Sheet
239
2002-05-06