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SSA3000X User Manual 22
when the scale type is set to “log”. In process of using pay attention to the following points:
By changing the scale, the amplitude range available is adjusted。
The Minimum range: reference level –10 × current scale value;
The Maximum range: the reference level.
Table 2-8 Scale
2.1.3.6 Scale Type
Set the scale type of Y-axis to Lin or Log. The default is Log.
In Lin mode, Scale value cannot be changed. Display area for reference level of 0%. In
process of using pay attention to the following points:
In Log scale type, the Y-axis denotes the logarithmic coordinate; the value shown at the top of
the grid is the reference level and each grid represents the scale value. The unit of Y-axis will
automatically switch to the default unit (dBm) in Log scale type is changed from Lin to Log.
In Lin scale type, the Y-axis denotes the liner coordinate; the values shown at the top of the
grid and the bottom of the grid are the reference level and the scale setting function is invalid.
The unit of Y-axis will automatically switch to the default unit (Volts) in Lin scale type when the
scale type is charged from Log to Lin.
2.1.3.7 Ref Offset
Assign an offset to the reference level to compensate for gains or losses generated between the
device under measurement and the analyzer.
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.
Table 2-9 Ref Offset
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