XRT75R12D_06 Datasheet, PDF (38/134 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET

XRT75R12D
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.1
TABLE 6: STS-1 PULSE MASK EQUATIONS
TIME IN UNIT INTERVALS
NORMALIZED AMPLITUDE
-0.68 < T < 0.26
·
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]
TABLE 7: 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)
Transmit Output Pulse Width
0.90
1.00
1.10
V_pk
8.6
9.65
10.6
ns
Transmit Output Pulse Amplitude Ratio
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%.
33