參數(shù)資料
型號: XRT83SL28IV
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PQFP144
封裝: 20 X 20 MM, 1.40 MM HEIGHT, TQFP-144
文件頁數(shù): 30/47頁
文件大?。?/td> 377K
代理商: XRT83SL28IV
XRT83SL28
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
xr
REV. 1.0.0
28
3.2.5
For N+1 redundancy, the transmitters on all cards can be programmed for internal impedance. The
transmitters on the backup card do not have to be tri-stated. To swap the primary card, close the desired
relays. A 0.68uF capacitor is used in series with TTIP for blocking DC bias. See Figure 23 for a simplified
block diagram of the transmit section for an N+1 redundancy scheme.
F
IGURE
23. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
T
RANSMIT
I
NTERFACE
FOR
N+1 R
EDUNDANCY
Transmit Interface with N+1 Redundancy
Backplane Interface
Primary Card
XRT83SL28
Tx
Line Interface Card
0.68uF
E1 Line
0.68uF
Primary Card
Tx
0.68uF
Primary Card
Tx
0.68uF
Backup Card
Tx
E1 Line
E1 Line
Internal Impedance
1:2
1:2
1:2
XRT83SL28
XRT83SL28
XRT83SL28
Internal Impedance
Internal Impedance
Internal Impedance
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