XRT73R12_07 Datasheet, PDF (28/89 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT73R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.2
TABLE 4: INTERFERENCE MARGIN TEST RESULTS
MODE
E3
DS3
STS-1
CABLE LENGTH (ATTENUATION)
0 dB
12 dB
0 feet
225 feet
450 feet
0 feet
225 feet
450 feet
INTERFERENCE TOLERANCE
Equalizer “IN”
-17 dB
-14 dB
-15 dB
-15 dB
-14 dB
-15 dB
-14 dB
-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
t_RRX
t_LCVO
t_FRX
t_CO
RPOS or
RNEG
25