PXB4219 Datasheet, PDF (237/290 Pages) Infineon Technologies AG – IWE8 Interworking Element for 8 E1/T1 Lines

PXB4219 / PXB4220 / PXB4221
Application Hints
ACM Jitter Transfer in E1 Mode: ASF=4
10,0
0,0
0,01
0,1
1
10
100
1000
-10,0
-20,0
-30,0
-40,0
-50,0
-60,0
Frequency [Hz]
Figure 48 ACM Jitter Transfer in E1 Mode with Jitter Attenuator
-50 ppm
0 ppm
+50 ppm
ITU G.735
and I.431
8.3.6 ACM Jitter Transfer in T1 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: 0.075 Hz for ASF=4,
0.3 Hz for ASF=16.
The jitter attenuator improves the already very good jitter transfer behavior. At -130 ppm
all jitter is removed.
Data Sheet
237
2002-05-06