Rigol DSA875 Manual de usuario Pagina 68

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RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800 Series
2-16
Units
Set the unit of the Y-axis to dBm, dBmV, dBuV, Volts or Watts. Wherein, dBm,
dBmV and dBuV are for Log scale; Volts and Watts are for Linear scale. The default
is dBm.
Key Points:
The conversion relationships between units are as follows.
×=
W
R
Volts
B
001.0
1
log10md
2
(2-4)
=
V
Volts
VB
µ
µ
1
log20d
(2-5)
=
V
Volts
VB
m1
log20
md
(2-6)
R
Volts
Watts
2
=
(2-7)
Wherein,
R
denotes the reference resistance.
Ref Offset
Assign an offset to the reference level to compensate for gains or losses generated
between the device under measurement and the analyzer.
Key Points:
The change of this value changes both the reference level readout and the
amplitude readout of the marker; but does not impact the position of the
curve on the screen.
You can modify this parameter using the numeric keys. For more details,
please refer to Parameter Setting”.
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