參數(shù)資料
型號(hào): IDT82P2916BFG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 57/138頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 16CH SH 484BGA
標(biāo)準(zhǔn)包裝: 84
功能: 線路接口單元(LIU)
接口: E1,J1,T1
電路數(shù): 16
電源電壓: 1.8V, 3.3V
功率(瓦特): 3.10W
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 484-LFBGA
供應(yīng)商設(shè)備封裝: 484-CABGA(19x19)
包裝: 托盤
包括: AIS 警報(bào)檢測(cè)器和發(fā)生器,回送功能,PRBS 發(fā)生器 / 檢測(cè)器,遠(yuǎn)程檢測(cè)器和發(fā)生器
IDT82P2916
16-CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
25
April 24, 2010
3.2.2
EQUALIZER
The equalizer compensates high frequency attenuation to enhance
receive sensitivity.
3.2.2.1 Line Monitor
In both T1/J1 and E1 short haul applications, the Protected Non-
Intrusive Monitoring per T1.102 can be performed between two devices.
The monitored channel of one device is in normal operation, and the
monitoring channel of the other device taps the monitored one through a
high impedance bridging circuit (refer to Figure-9 and Figure-10).
After the high resistance bridging circuit, the signal arriving at RTIPn/
RRINGn of the monitoring channel is dramatically attenuated. To
compensate this bridge resistive attenuation, Monitor Gain can be used
to boost the signal by 20 dB, 26 dB or 32 dB, as selected by the MG[1:0]
bits (b1~0, RCF2,...). For normal operation, the Monitor Gain should be
set to 0 dB, i.e., the Monitor Gain of the monitored channel should be 0
dB.
The monitoring channel can be configured to any of the External,
Partially Internal or Fully Internal Impedance Matching mode. Here the
external r or internal IM is used for voltage division, not for impedance
matching. That is, the r (IM) and the two R make up of a resistance
bridge. The resistive attenuation of this bridge is 20lg(r/(2R+r)) dB.
Note that line monitor is only available in differential line interface.
3.2.2.2 Receive Sensitivity
The receive sensitivity is the minimum range of receive signal level
for which the receiver recovers data error-free with -18 dB interference
signal added.
For Receive Differential line interface, the receive sensitivity is -15
dB.
For Receive Single Ended line interface, the receive sensitivity is -12
dB.
Figure-9 Receive Path Monitoring
Figure-10 Transmit Path Monitoring
RTIPn
RRINGn
RTIPn
RRINGn
monitored channel
monitoring channel
DSX cross
connect point
R
monitor gain
= 20/26/32 dB
monitor gain
= 0 dB
R
r
TTIPn
TRINGn
RTIPn
RRINGn
monitored channel
monitoring channel
DSX cross
connect point
R
monitor gain
= 20/26/32 dB
monitor gain
= 0 dB
R
r
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