XRT75L00D Datasheet, PDF (48/92 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75L00D
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
FIGURE 25. PRBS MODE
REV. 1.0.2
RClk
RNEG/LCV
SYNC LOSS
PRBS SYNC
Single Bit Error
8.2 LOOPBACKS:
The XRT75L00D offers three loopback modes for diagnostic purposes. In Hardware mode, the loopback
modes are selected via the RLB and LLB pins. In Host mode, the RLB and LLB bits in the control registers
select the loopback modes.
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