XRT75R12D_07 Datasheet, PDF (45/133 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET

XRT75R12D
REV. 1.0.3 TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
TABLE 9: STS-1 PULSE MASK EQUATIONS
TIME IN UNIT INTERVALS
-0.68 < T < 0.26
NORMALIZED AMPLITUDE
·
0.5
1
+
sin



π_--
2
¹
+
-----^T------
0.34





+ 0.03
0.26 < T < 1.4
0.1 + 0.61 x e^-2.4[T-0.26]
TABLE 10: STS-1 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-253)
PARAMETER
MIN
TRANSMITTER LINE SIDE OUTPUT CHARACTERISTICS
Transmit Output Pulse Amplitude
0.65
(measured with TxLEV = 0)
TYP
0.75
MAX
0.90
UNITS
V_pk
Transmit Output Pulse Amplitude
(measured with TxLEV = 1)
0.90
1.00
1.10
V_pk
Transmit Output Pulse Width
Transmit Output Pulse Amplitude Ratio
8.6
9.65
10.6
ns
0.90
1.00
1.10
Transmit Intrinsic Jitter
RECEIVER LINE SIDE INPUT CHARACTERISTICS
Receiver Sensitivity (length of cable)
900
0.02
1100
0.05
UI_pp
feet
Jitter Tolerance @ Jitter Frequency 400 KHz
Signal Level to Declare Loss of Signal
0.15
UI_pp
Refer to Table 3
Signal Level to Clear Loss of Signal
Refer to Table 3
NOTE: The above values are at TA = 25⁰C and V_DD = 3.3 V ± 5%.
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