XRT73R12_07 Datasheet, PDF (36/89 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
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



π_{2-- }
1
+
0----.-^{T-1---8--}



– 0.03
0.36 < T < 1.4
-0.85 < T < -0.68
-0.68 < T < 0.26
- 0.03
UPPER CURVE
0.03
·
0.5
1
+
sin



π_--
2


1
+
0----.-^{T-3---4--}



+ 0.03
0.26 < T < 1.4
0.1 + 0.61 x e^-2.4[T-0.26]
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