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XRT86VL32IB bảng dữ liệu(PDF) 13 Page - Exar Corporation

tên linh kiện XRT86VL32IB
Giải thích chi tiết về linh kiện  T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
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nhà sản xuất  EXAR [Exar Corporation]
Trang chủ  http://www.exar.com
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XRT86VL32IB bảng dữ liệu(HTML) 13 Page - Exar Corporation

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XRT86VL3X
6
REV. 1.2.2
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
1.2.5
Receive Interface with 1:1 and 1+1 Redundancy
The receivers on the backup card should be programmed for "High" impedance. Since there is no external
resistor in the circuit, the receivers on the backup card will not load down the line interface. This key design
feature eliminates the need for relays and provides one bill of materials for all interface modes of operation.
Select the impedance for the desired mode of operation, T1/E1/J1. To swap the primary card, set the backup
card to internal impedance, then the primary card to "High" impedance. See Figure 5. for a simplified block
diagram of the receive section for a 1:1 redundancy scheme.
FIGURE 5. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR 1:1 AND 1+1 REDUNDANCY
"High" Impedence
Internal Impedence
Backplane Interface
Primary Card
Backup Card
XRT86VL3x
Rx
T1/E1 Line
Rx
1:1
1:1
XRT86VL3x



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