XRT75L02 Datasheet, PDF (5/50 Pages) Exar Corporation – TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER

XRT75L02
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
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REV. 1.0.3
5.2 CLOCK AND DATA RECOVERY: .................................................................................................................. 28
FIGURE 17. INTERFERENCE MARGIN TEST SET UP FOR DS3/STS-1................................................................................................ 28
FIGURE 18. INTERFERENCE MARGIN TEST SET UP FOR E3.............................................................................................................. 28
TABLE 9: INTERFERENCE MARGIN TEST RESULTS ........................................................................................................................... 28
5.3 B3ZS/HDB3 DECODER: ................................................................................................................................. 29
5.4 LOS (LOSS OF SIGNAL) DETECTOR: .......................................................................................................... 29
5.4.1 DS3/STS-1 LOS CONDITION: .................................................................................................................................... 29
DISABLING ALOS/DLOS DETECTION:...........................................................................................................29
5.4.2 E3 LOS CONDITION:.................................................................................................................................................. 29
TABLE 10: THE ALOS (ANALOG LOS) DECLARATION AND CLEARANCE THRESHOLDS FOR A GIVEN SETTING OF REQEN (DS3 AND STS-1
APPLICATIONS) ............................................................................................................................................................... 29
5.4.3 MUTING THE RECOVERED DATA WITH LOS CONDITION: ................................................................................... 30
FIGURE 19. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775 .......................................................................................... 30
FIGURE 20. LOSS OF SIGNAL DEFINITION FOR E3 AS PER ITU-T G.775. ......................................................................................... 30
6.0 JITTER: ................................................................................................................................................31
6.1 JITTER TOLERANCE - RECEIVER: .............................................................................................................. 31
6.1.1 DS3/STS-1 JITTER TOLERANCE REQUIREMENTS: ............................................................................................... 31
FIGURE 21. JITTER TOLERANCE MEASUREMENTS............................................................................................................................ 31
6.1.2 E3 JITTER TOLERANCE REQUIREMENTS:............................................................................................................. 32
FIGURE 22. INPUT JITTER TOLERANCE FOR DS3/STS-1 ................................................................................................................ 32
FIGURE 23. INPUT JITTER TOLERANCE FOR E3 .............................................................................................................................. 32
6.2 JITTER TRANSFER - RECEIVER/TRANSMITTER: ...................................................................................... 33
6.3 JITTER GENERATION: .................................................................................................................................. 33
6.4 JITTER ATTENUATOR: ................................................................................................................................. 33
TABLE 11: JITTER AMPLITUDE VERSUS MODULATION FREQUENCY (JITTER TOLERANCE)................................................................... 33
TABLE 12: JITTER TRANSFER SPECIFICATION/REFERENCES............................................................................................................. 33
TABLE 13: JITTER TRANSFER PASS MASKS .................................................................................................................................... 34
FIGURE 24. JITTER TRANSFER REQUIREMENTS AND JITTER ATTENUATOR PERFORMANCE................................................................ 34
7.0 SERIAL HOST INTERFACE: ...............................................................................................................35
TABLE 14: FUNCTIONS OF SHARED PINS ......................................................................................................................................... 35
TABLE 15: REGISTER MAP AND BIT NAMES .................................................................................................................................... 35
TABLE 16: REGISTER MAP DESCRIPTION - GLOBAL......................................................................................................................... 36
TABLE 17: REGISTER MAP AND BIT NAMES - CHANNEL 0 REGISTERS.............................................................................................. 36
TABLE 18: REGISTER MAP AND BIT NAMES - CHANNEL 1 REGISTERS.............................................................................................. 37
TABLE 19: REGISTER MAP DESCRIPTION - CHANNEL 0.................................................................................................................... 38
8.0 DIAGNOSTIC FEATURES: ..................................................................................................................42
8.1 PRBS GENERATOR AND DETECTOR: ........................................................................................................ 42
8.2 LOOPBACKS: ................................................................................................................................................. 42
8.2.1 ANALOG LOOPBACK:............................................................................................................................................... 42
FIGURE 25. PRBS MODE ............................................................................................................................................................. 42
8.2.2 DIGITAL LOOPBACK:................................................................................................................................................ 43
8.2.3 IREMOTE LOOPBACK:.............................................................................................................................................. 43
FIGURE 26. ANALOG LOOPBACK ..................................................................................................................................................... 43
FIGURE 27. DIGITAL LOOPBACK...................................................................................................................................................... 43
8.3 TRANSMIT ALL ONES (TAOS): .................................................................................................................... 44
FIGURE 28. REMOTE LOOPBACK .................................................................................................................................................... 44
FIGURE 29. TRANSMIT ALL ONES (TAOS) ...................................................................................................................................... 44
TABLE 20: TRANSFORMER RECOMMENDATIONS .................................................................................................................. 45
TABLE 21: TRANSFORMER DETAILS ................................................................................................................................................ 45
ORDERING INFORMATION.............................................................................................47
PACKAGE DIMENSIONS.................................................................................................47
REVISION HISTORY.......................................................................................................................................48
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