PXB4219 Datasheet, PDF (240/290 Pages) Infineon Technologies AG – IWE8 Interworking Element for 8 E1/T1 Lines

PXB4219 / PXB4220 / PXB4221
Application Hints
10,0
0,0
0,01
-10,0
-20,0
-30,0
-40,0
-50,0
-60,0
SRTS Jitter Transfer
0,1
1
10
100
1000
Frequency [Hz]
-50 ppm
0 ppm
+50 ppm
ITU G.735
and I.431
Figure 52 SRTS Jitter Transfer in E1 Mode with Jitter Attenuator
8.3.8 SRTS Jitter Transfer in T1 Mode
The aliasing effect which is inherent to the SRTS algorithm causes the jitter transfer at
513 Hz and all multiples of 513 Hz to be a copy of the jitter transfer at 0 Hz. This violates
the requirements.
However, the measurement equipment was not able to measure jitter transfer above 100
Hz and the expected peaking is not measured.
The jitter attenuator removes jitter frequencies above 20 Hz. There is no aliasing and the
requirements are met.
Data Sheet
240
2002-05-06