XRT7302IQ80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IQ80' PDF : 77 Pages View PDF
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2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7302
REV. 1.1.0
FIGURE 13. THE "BELLCORE GR-253-CORE" TRANSMIT OUTPUT PULSE TEMPLATE FOR SONET STS-1
APPLICATIONS
ST S-1 Pulse T em p late
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
2.4.1 Enabling the Transmit Line Build-Out Cir-
cuit
If the user enables the "Transmit Line Build-Out" Cir-
cuit, then the "Transmit Section" of the Channel (with-
in the XRT7302 device) will output shaped pulses on-
to the line via the TTIP and TRing output pins.
The user enables the Transmit Line Build-Out circuit
(for each channel within the XRT7302 device) by do-
ing the following:
Channel 1
In the "Hardware" Mode
• Set the "TxLEV1" input pin (pin 1) to "LOW"
And;
In the "Host" Mode
• Set the "TxLEV1" bit-field to "0", as illustrated
below.
COMMAND REGISTER, CR1 (ADDRESS = 0X01)
D4
D3
D2
TxOFF1 TAOS1 TxClkINV1
0
X
X
D1
D0
TxLEV1 TxBIN1
0
X
Channel 2
In the "Hardware" Mode
• Set the "TxLEV2" input pin (pin 60) to "LOW".
In the "Host" Mode
And;
• Set the "TxLEV2" bit-field to "0", as illustrated
below.
35
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