參數(shù)資料
型號: XRT83VSH316IB
廠商: Exar Corporation
文件頁數(shù): 36/98頁
文件大小: 0K
描述: IC LIU SH T1/E1/J1 16CH 316STBGA
標準包裝: 60
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 16/16
規(guī)程: T1,E1,J1
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 316-LBGA
供應商設備封裝: 316-STBGA(21x21)
包裝: 托盤
XRT83VSH316
38
REV. 1.0.1
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
5.0
T1/E1 APPLICATIONS
This application section describes common T1/E1 system considerations along with the various loop back
modes available in the LIU.
5.1
Loopback Diagnostics
The XRT83VSH316 supports several loopback modes for diagnostic testing. The following section describes
the local analog loopback, remote loopback, digital loopback, and dual loopback modes.
5.1.1
Local Analog Loopback
With local analog loopback activated, the transmit output data at TTip/TRing is internally looped back to the
analog inputs at RTip/RRing. External inputs at RTip/RRing are ignored while valid transmit output data
continues to be sent to the line. A simplified block diagram of local analog loopback is shown in Figure 24.
FIGURE 24. SIMPLIFIED BLOCK DIAGRAM OF LOCAL ANALOG LOOPBACK
B8ZS/HDB3
Decoder
32-bit/64-bit
Jitter Attenuator
Clock & Data
Recovery (CDR)
Peak Detector
& Slicer
System Generator
SAIS, SLOS, SPRBS
Line Detector
AIS, RLOS, LCV
RNEG/LCV
RPOS
RCLK
B8ZS/HDB3
Encoder
32-bit/64-bit
Jitter Attenuator
Timing
Control
Tx Pulse Shaper
Line Driver
Analog
Loop Back
MUX
DMO
System Detector
SAIS, SLOS, SPRBS
Line Generator
PRBS
TPOS
TNEG
TCLK
TTIP
TRING
AIS
Channel N of 16
DMO
SLOS
TxON
PRBS
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