XRT75R12_07 Datasheet, PDF (28/90 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER

XRT75R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.3
MODE
E3
DS3
STS-1
TABLE 4: INTERFERENCE MARGIN TEST RESULTS
CABLE LENGTH (ATTENUATION)
INTERFERENCE TOLERANCE
Equalizer “IN”
0 dB
-17 dB
12 dB
-14 dB
0 feet
-15 dB
225 feet
-15 dB
450 feet
-14 dB
0 feet
-15 dB
225 feet
-14 dB
450 feet
-14 dB
3.5.5 Muting the Recovered Data with LOS condition:
When the LOS condition is declared, the clock recovery circuit locks into the reference clock applied to the
internal master clock outputs this clock onto the RxClk_n output pin. The data on the RxPOS_n and RxNEG_n
pins can be forced to zero by setting the LOSMUT_n bits in the individual channel control register to “1”.
NOTE: When the LOS condition is cleared, the recovered data is output on RxPOS_n and RxNEG_n pins.
FIGURE 12. RECEIVER DATA OUTPUT AND CODE VIOLATION TIMING
RxClk
LCV
RPOS or
RNEG
t_RRX
t_LCVO
t_CO
t_FRX
25