PXB4221 Infineon Technologies AG, PXB4221 Datasheet - Page 233
PXB4221
Manufacturer Part Number
PXB4221
Description
IWE8 Interworking Element for 8 E1/T1 Lines
Manufacturer
Infineon Technologies AG
Datasheet
1.PXB4221.pdf
(290 pages)
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8.3.3
The aliasing effect which is inherent to the SRTS algorithm causes the jitter tolerance at
681 Hz and all multiples of 681 Hz to be a copy of the jitter tolerance at 0 Hz.
The jitter tolerance of the bare device meets the requirements of ITU-T G.823 and I.431
only at medium and low frequencies. At high frequencies it is lower than the
requirements.
In combination with an jitter attenuator the tolerance at high frequencies is better than
0.2 UI. All requirements are met.
Figure 43
Data Sheet
100,0
10,0
1,0
0,1
1
SRTS Jitter Tolerance in E1 Mode
SRTS Jitter Tolerance in E1 Mode without Jitter Attenuator
10
SRTS Jitter Tolerance in E1 Mode
100
1000
10000
233
100000 1000000
PXB4219 / PXB4220 / PXB4221
Application Hints
Freqency [Hz]
-50 ppm
0 ppm
+50 ppm
ITU G.823
and I.431
2002-05-06
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