AD8392AAREZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
AD8392AAREZ
Analog Devices
AD8392AAREZ Datasheet PDF : 12 Pages
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AD8392A
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
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
CENTER 646.9kHz
Figure 19. MTPR at 647 kHz
SPAN 10kHz
Data Sheet
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
CENTER 1.9664kHz
Figure 20. MTPR at 1.966 MHz
SPAN 10kHz
Rev. A | Page 10 of 12
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