PXB4219 Datasheet, PDF (236/290 Pages) Infineon Technologies AG – IWE8 Interworking Element for 8 E1/T1 Lines

PXB4219 / PXB4220 / PXB4221
Application Hints
8.3.5 ACM Jitter Transfer in E1 Mode
The jitter transfer characteristics are much better than the requirements of ITU-T G.735
and I. 432.
The -3dB point of the transfer curve is proportional to the PLL-gain: 0.05 Hz for ASF=4,
0.2 Hz for ASF=16.
No impact of the jitter attenuator on the already very good jitter transfer behavior could
be measured.
ACM Jitter Transfer in E1 mode: ASF=4
10,0
0,0
0,01
0,1
1
-10,0
10
100
-20,0
-30,0
-40,0
-50,0
-60,0
Frequency [Hz]
1000
-50 ppm
0 ppm
+50 ppm
ITU G.735
and I.431
Figure 47 ACM Jitter Transfer in E1 Mode without Jitter Attenuator
Data Sheet
236
2002-05-06