PXB4221 Infineon Technologies AG, PXB4221 Datasheet - Page 239

• Manufacturer Part Number: PXB4221
• Description: IWE8 Interworking Element for 8 E1/T1 Lines
• Manufacturer: Infineon Technologies AG

8.3.7
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.
Figure 51
Data Sheet
-10,0
-20,0
-30,0
-40,0
-50,0
-60,0
10,0
0,0
0,01
SRTS Jitter Transfer in E1 Mode
SRTS Jitter Transfer in E1 Mode without Jitter Attenuator
0,1
SRTS Jitter Transfer in E1 Mode
Frequency [Hz]
1
239
10
PXB4219 / PXB4220 / PXB4221
100
1000
Application Hints
-50 ppm
0 ppm
+50 ppm
ITU G.735
and I.431
2002-05-06