PXB4219E Datasheet, PDF (237/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Application Hints
10,0
0,0
0,01
-10,0
-20,0
-30,0
ACM Jitter Transfer in E1 Mode: ASF=4
0,1
1
10
100
1000
-50 ppm
0 ppm
+50 ppm
-40,0
-50,0
-60,0
Frequency [Hz]
Figure 48 ACM Jitter Transfer in E1 Mode with Jitter Attenuator
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
2003-01-20