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| 型號： | AN-03 |
| 英文描述： | SONET OC-12 Jitter Measurement |
| 中文描述： | 與SONET OC - 12抖動測量 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 56K |
| 代理商： | AN-03 |
JITTER GENERATION
Jitter Generation Definition
Bellcore TR-NWT-000499 (Issue 4), section 7.3.3 "Jitter
generation is the process whereby jitter appears at the
output port of an individual unit of digital equipment in the
absence of applied input jitter."
Jitter Generation Requirement
Bellcore TA-NWT-000253 (Issue 2), section 5.6.5.2 "For
Category II interfaces, jitter generation shall not exceed 0.01
UI rms. For OC-N and STSX-N interfaces, a high-pass
measurement filter with a 12kHz cutoff frequency shall be
used." The low-pass cutoff frequency of the measurement
filter shall be higher than 5MHz.
The characteristic of the measurement filter is shown
below.
SONET OC-12 Category II Jitter Generation Measurement
Filter Characteristics
Figure 1
APPLICATION NOTE
AN-03
Rev.: C
Issue Date: June, 1998
Amendment: /0
SONET OC-12
JITTER MEASUREMENT
+20dB/decade
UI (rms)
0.01
12kHz
Frequency
5MHz
(minimum)
1
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