pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 230
![no-image](/images/no-image-200.jpg)
pxb4219
Manufacturer Part Number
pxb4219
Description
Iwe8 Interworking Element For 8 E1/t1 Lines
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PXB4219.pdf
(290 pages)
- Current page: 230 of 290
- Download datasheet (4Mb)
8.3
This section shows the results of jitter analysis of the ICRC. The device is intended to be
used with an external jitter attenuator. For this purpose Infineon’s FALC-LH was used.
Results are shown with and without jitter attenuator. Measurements were done using a
Wandel & Goltermann ANT20 for IWE8 in T1 mode with FALC-LH and Wandel &
Goltermann PFJ-8 for the bare IWE8 in E1 or T1 mode.
8.3.1
The jitter tolerance falls with 20 dB per decade, It is independent from the PLL gain
("ASF").
For the bare device the jitter tolerance meets the requirements of ITU-T G.823 and I.431
at medium and low frequencies. At frequencies lower than 1 KHz the jitter tolerance is
more than 20 UI. At high frequencies it is lower than the requirements.
In combination with an jitter attenuator the requirements are met. Jitter tolerance at high
frequencies is better than 0.2 UI.
Figure 39
Data Sheet
100,0
10,0
1,0
0,1
1
Jitter Characteristics of the Internal Clock Recovery Circuit
ACM Jitter Tolerance in E1 Mode
ACM Jitter Tolerance in E1 m ode, CDV=0, ASF=4
ACM Jitter Tolerance in E1 Mode without Jitter Attenuator
10
100
1000
10000
230
100000 1000000 Frequency [Hz]
PXB4219 / PXB4220 / PXB4221
Application Hints
-50 ppm
0 ppm
+50 ppm
ITU G.823
and I.431
2002-05-06
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