参数资料
型号: AD8392AAREZ
厂商: Analog Devices Inc
文件页数: 2/12页
文件大小: 0K
描述: IC ADSL/ADSL2 LINE DRVR 28-TSSOP
标准包装: 50
类型: 驱动器
驱动器/接收器数: 2/0
规程: xDSL
电源电压: 5 V ~ 24 V
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.173",4.40mm 宽)裸露焊盘
供应商设备封装: 28-HTSSOP
包装: 管件
AD8392A
Rev. 0 | Page 10 of 12
MULTITONE POWER RATIO
The DMT signal used in ADSL/ADSL2+ systems carries data in
discrete tones or bins, which appear in the frequency domain in
evenly spaced 4.3125 kHz intervals. In applications using this
type of waveform, multitone power ratio (MTPR) is a commonly
used measure of linearity. MTPR is defined as the measured
difference from the peak of one tone that is loaded with data to
the peak of an adjacent tone that is intentionally left empty.
Figure 19 and Figure 20 show the AD8392A MTPR for a 5.5
crest factor waveform for empty bins in the ADSL and extended
ADSL2+ bandwidths.
0
–100
CENTER 646.9kHz
SPAN 10kHz
(d
B
m
)
–10
–20
–30
–40
–50
–60
–70
–80
–90
06
47
7-
0
43
Figure 19. MTPR at 647 kHz
0
–100
CENTER 1.9664kHz
SPAN 10kHz
(d
B
m
)
–10
–20
–30
–40
–50
–60
–70
–80
–90
06
47
7-
0
44
Figure 20. MTPR at 1.966 MHz
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