XRT75R12D_06 Datasheet, PDF (37/134 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET

XRT75R12D
REV. 1.0.1 TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
TABLE 5: E3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS
PARAMETER
Occurence of LOS to LOS Declaration Time
Termination of LOS to LOS Clearance Time
MIN
TYP
MAX
UNITS
10
255
UI
10
255
UI
NOTE: The above values are at TA = 25⁰C and V_DD = 3.3 V± 5%.
FIGURE 22. BELLCORE GR-253 CORE TRANSMIT OUTPUT PULSE TEMPLATE FOR SONET STS-1 APPLICATIONS
ST S-1 Pulse T emplate
1.2
1
0.8
0.6
Lower Curve
Upper Curve
0.4
0.2
0
-0.2
-1 _{-0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1}
0 _{0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9}
Time, in UI
1 _{1.1 1.2 1.3 1.4}
TABLE 6: STS-1 PULSE MASK EQUATIONS
TIME IN UNIT INTERVALS
NORMALIZED AMPLITUDE
LOWER CURVE
-0.85 < T < -0.38
- 0.03
-0.38 < T < 0.36
·
0.5
1
+
sin
⎧⎩⎨ _2-π-
⎝⎛ ¹
+
-----T------
0.18
⎞
⎠
⎫
⎬
⎭
– 0.03
0.36 < T < 1.4
-0.85 < T < -0.68
UPPER CURVE
- 0.03
0.03
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