參數資料
型號: TNETA1555
廠商: Texas Instruments, Inc.
英文描述: 155.52-Mbit/S Clock-Recovery Device(155.52-MBIT/S時鐘恢復裝置)
中文描述: 155.52 - Mbit / s的時鐘恢復裝置(155.52 - Mbit / s的時鐘恢復裝置)
文件頁數: 7/10頁
文件大?。?/td> 230K
代理商: TNETA1555
TNETA1555
155.52-MBIT/S CLOCK-RECOVERY DEVICE
SDNS001B – SEPTEMBER 1992 – REVISED DECEMBER 1994
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
jitter tolerance (continued)
0.1
0.01
10
100
1k
10k
P
1
10
100
1000
100k
1M
10M
f – Frequency – Hz
TNETA1555
Bellcore
I
Figure 2. Jitter Tolerance (Worst Case)
transitionless bit periods
The SONET/SDH specifications do not use a line code that limits the number of transitionless bit periods in a
bit stream to a specific number. Instead, a scrambler is used to provide some randomization of the line signal.
As long as the output data stream does not match the output of the scrambler, this technique works fairly well.
However, it is possible for the scrambled data stream to contain a large number of transitionless bit periods,
depending upon the data being transmitted. It is important that the clock-recovery device handle large numbers
of transitionless bit periods without causing a bit error. Figures 3 and 4 show the results of tests conducted on
the TNETA1555 for transitionless bit periods. The y-axis shows the number of transitionless bit periods that the
devices can accept before a bit error is recorded on the bit-error rate tester.
相關PDF資料
PDF描述
TNETA1556 155.52-Mbit/S Clock-Recovery Device(155.52-MBIT/S時鐘恢復裝置)
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TNETA1561 ATM Segmentation and Reassembly Device with PCI Host Interface(ATM 分段和重設裝置帶SBUS主機接口)
TNETA1600 SONET/SDH ATM Receiver/Transmitter for 622.08-Mit/s or 155.52-Mbit/s Operation(SONET/SDH ATM接收器/傳送器)
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