REV. 1.0.7 5.1.3 Digital Loopback With digital loopback activated, the transmit " />
參數(shù)資料
型號: XRT83SH38IB-F
廠商: Exar Corporation
文件頁數(shù): 32/78頁
文件大?。?/td> 0K
描述: IC LIU SH T1/E1/J1 8CH 225BGA
標準包裝: 84
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 8/8
規(guī)程: T1,E1,J1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 225-BGA
供應商設備封裝: 225-BGA(19x19)
包裝: 托盤
XRT83SH38
35
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.7
5.1.3
Digital Loopback
With digital loopback activated, the transmit input data at TCLK/TPOS/TNEG is looped back to the receive
output data at RCLK/RPOS/RNEG. The digital loopback mode includes the Transmit JA (if enabled). The
receive input data at RTIP/RRING is ignored while valid transmit output data continues to be sent to the line. A
simplified block diagram of digital loopback is shown in Figure 25.
FIGURE 25. SIMPLIFIED BLOCK DIAGRAM OF DIGITAL LOOPBACK
5.1.4
Dual Loopback
With dual loopback activated, the remote loopback is combined with the digital loopback. A simplified block
diagram of dual loopback is shown in Figure 26.
FIGURE 26. SIMPLIFIED BLOCK DIAGRAM OF DUAL LOOPBACK
Encoder
Decoder
Timing
Control
Data and
Clock
Recovery
JA
Tx
Rx
TAOS
QRSS
TTIP
TRING
RTIP
RRING
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
Encoder
Decoder
Timing
Control
Data and
Clock
Recovery
JA
Tx
Rx
TAOS
QRSS
TTIP
TRING
RTIP
RRING
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
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