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XRT75L00 数据表(PDF) 5 Page - Exar Corporation

部件名 XRT75L00
功能描述  E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

XRT75L00 数据表(HTML) 5 Page - Exar Corporation

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XRT75L00
E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.2
II
5.1 AGC/EQUALIZER ........................................................................................................................................... 28
5.1.1 INTERFERENCE TOLERANCE.................................................................................................................................. 28
FIGURE 17. INTERFERENCE MARGIN TEST SET UP FOR DS3/STS-1 ...................................................................................................... 29
FIGURE 18. INTERFERENCE MARGIN TEST SET UP FOR E3. ................................................................................................................... 29
TABLE 9: INTERFERENCE MARGIN TEST RESULTS ................................................................................................................................. 29
5.2 CLOCK AND DATA RECOVERY: .................................................................................................................. 30
5.3 B3ZS/HDB3 DECODER: ................................................................................................................................ 30
5.4 LOS (LOSS OF SIGNAL) DETECTOR: ......................................................................................................... 30
5.4.1 DS3/STS-1 LOS CONDITION: .................................................................................................................................... 30
DISABLING ALOS/DLOS DETECTOR: ........................................................................................................................... 30
5.4.2 E3 LOS CONDITION:.................................................................................................................................................. 30
TABLE 10: THE ALOS (ANALOG LOS) DECLARATION AND CLEARANCE THRESHOLDS FOR A GIVEN SETTING OF REQEN (DS3 AND STS-1 AP-
PLICATIONS
).......................................................................................................................................................................... 30
FIGURE 19. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775 ................................................................................................ 31
FIGURE 20. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775................................................................................................. 31
5.4.2.1 MUTING THE RECOVERED DATA WITH LOS CONDITION: ......................................................................................... 32
6.0 JITTER: ................................................................................................................................................ 33
6.1 JITTER TOLERANCE - RECEIVER: .............................................................................................................. 33
6.1.1 DS3/STS-1 JITTER TOLERANCE REQUIREMENTS:............................................................................................... 33
FIGURE 21. JITTER TOLERANCE MEASUREMENTS .................................................................................................................................. 33
6.1.2 E3 JITTER TOLERANCE REQUIREMENTS:............................................................................................................. 34
FIGURE 22. INPUT JITTER TOLERANCE FOR DS3/STS-1 ......................................................................................................................34
FIGURE 23. INPUT JITTER TOLERANCE FOR E3 .................................................................................................................................... 34
6.2 JITTER TRANSFER - RECEIVER/TRANSMITTER: ...................................................................................... 35
6.3 JITTER GENERATION: .................................................................................................................................. 35
6.4 JITTER ATTENUATOR: ................................................................................................................................. 35
TABLE 11: JITTER AMPLITUDE VERSUS MODULATION FREQUENCY (JITTER TOLERANCE) ......................................................................... 35
TABLE 12: JITTER TRANSFER SPECIFICATIONS ...................................................................................................................................... 35
TABLE 13: JITTER TRANSFER PASS MASKS........................................................................................................................................... 36
FIGURE 24. JITTER TRANSFER REQUIREMENTS AND JITTER ATTENUATOR PERFORMANCE ...................................................................... 36
7.0 SERIAL HOST INTERFACE: ............................................................................................................... 37
TABLE 14: FUNCTIONS OF SHARED PINS................................................................................................................................................ 37
TABLE 15: REGISTER MAP AND BIT NAMES ........................................................................................................................................... 37
TABLE 16: REGISTER MAP DESCRIPTION .............................................................................................................................................. 39
TABLE 17: REGISTER MAP DESCRIPTION - GLOBAL ............................................................................................................................... 43
8.0 DIAGNOSTIC FEATURES: ................................................................................................................. 44
8.1 PRBS GENERATOR AND DETECTOR: ........................................................................................................ 44
8.2 LOOPBACKS: ................................................................................................................................................ 44
8.2.1 ANALOG LOOPBACK:............................................................................................................................................... 44
FIGURE 25. PRBS MODE ................................................................................................................................................................... 44
8.2.2 DIGITAL LOOPBACK:................................................................................................................................................ 45
FIGURE 26. ANALOG LOOPBACK ........................................................................................................................................................... 45
FIGURE 27. DIGITAL LOOPBACK ............................................................................................................................................................ 45
8.2.3 REMOTE LOOPBACK:............................................................................................................................................... 46
8.3 TRANSMIT ALL ONES (TAOS): .................................................................................................................... 46
FIGURE 28. REMOTE LOOPBACK ........................................................................................................................................................... 46
FIGURE 29. TRANSMIT ALL ONES (TAOS) ............................................................................................................................................ 46
ORDERING INFORMATION ............................................................................................................................................. 47
PACKAGE DIMENSIONS ............................................................................................................. 47
REVISION HISTORY ...................................................................................................................................................... 48


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