PXB4219E INFINEON [Infineon Technologies AG], PXB4219E Datasheet - Page 240

• Manufacturer Part Number: PXB4219E
• Description: Interworking Element for 8 E1/T1 Lines
• Manufacturer: INFINEON [Infineon Technologies AG]

Figure 52
8.3.8
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
-10,0
-20,0
-30,0
-40,0
-50,0
-60,0
10,0
0,0
0,01
SRTS Jitter Transfer in T1 Mode
SRTS Jitter Transfer in E1 Mode with Jitter Attenuator
0,1
Frequency [Hz]
1
SRTS Jitter Transfer
240
10
PXB 4219E, PXB 4220E, PXB 4221E
100
1000
Application Hints
-50 ppm
0 ppm
+50 ppm
ITU G.735
and I.431
IWE8, V3.4
2003-01-20