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XRT75L00 Datasheet(PDF) 5 Page - Exar Corporation |
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XRT75L00 Datasheet(HTML) 5 Page - Exar Corporation |
5 / 50 page 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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