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SIGLENT
SSA3000X User Manual 23
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
Parameter
Explanation
Default
10 dB
Range
1 dB ~ 20 dB
Unit
dB
Knob Step
1 dB
Direction Key Step
1-2-5 sequence
Related to
Scale Type
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
Parameter
Explanation
Default
0dB
Range
-100dB ~ 100dB
Unit
dB
Knob Step
1dB
Direction Key Step
10dB
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