參數(shù)資料
型號: MH88524
廠商: Mitel Networks Corporation
英文描述: Dual 2-4 Wire Circuit Preliminary Information
中文描述: 雙2-4線制的初步信息
文件頁數(shù): 9/10頁
文件大小: 87K
代理商: MH88524
2-81
Preliminary Information
MH88524
Figure 10 - Application Circuit for Crosstalk Test
Figure 11 - Application Circuit with MT8840, MH88500 and MH88524
RX1
TX1
RX2
TX2
V
DD
AGND
V
EE
JUN2
JUN1
+5V
-5V
754
VOUT
JUN2
754
VIN RX1
VOUT
TX2
Notes
1) In addition to the above test circuit:
Apply VIN JUN1 and measure VOUT TX2 and VOUT JUN1.
Apply VIN JUN2 and measure VOUT TX1 and VOUT JUN1
Apply VIN RX2 and measure VOUT TX1 and VOUT JUN1.
2) All ground connections are star configured (i.e., single
point ground).
CT (Crosstalk) calculation
Examples:
CT = 20xlog (VIN RX1/VOUT JUN2)
CT = 20xlog (VIN RX1/VOUT TX2)
MH88524
Analog Signal Input
Digital Data Input
(2kHz max)
Digital Data Output
Analog Signal Output
32kHz ASK plus
Analog Input/Output
To Telephone Station
Set Input/Output
MH88524
MH88500
High Pass
Filter
Low Pass
Filter
MT8840
TXD1
RXD0
TX0
RX1
VSS
RX1
TX1
JUN1
AGND
JUNCTOR
TIP
RING
GND
Notes:
1) See MT8840 data sheet for device details.
2) See MH88500 data sheet for device details. Note that
this device is optional in this applications circuit.
3) High Pass Filter is typically 2nd order 15kHz
4) Low Pass Filter is typically 2nd order 4kHz
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