China Electronics Technology Instruments AV3672 Series, Руководство пользователя

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4 Measurement Setting
4.8 Observation of Multiple Tracks and Opening of Multiple Channels
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The scale refers to the scale of the vertical part of the display grid. In the polar coordinate and Smith chart format,
the scale refers to the full scale of the excircle. The display mode of measurement data on the screen are determined
by scale and format settings. In the log format, the scale setting range is 0.001dB/grid to 500dB/grid.
1) Scale setting
Menu path: [Response] > [Scale] . The scale sub-menu will pop up.
Set the appropriate scale, reference location and reference level by clicking the corresponding input zone or keys.
Fig. 4.26 Setting of Scale
2) Scale setting dialog box
a) Scale zone
➢
[Scale] box
Enter the set scale value.
➢
[Auto] button
Click the [Auto] button. The analyzer will automatically select the vertical scale to better display the active trace in
the vertical grid of the screen. The stimulus value will not be affected, and only the scale value and reference value
are changed.
i. An appropriate scale factor will be selected so that data are displayed in 80% of the screen.
ii. The center value of the trace on the screen will be selected as the reference value.
➢
[Auto All] button
Click the [Auto All] button. The analyzer will select appropriate scales of all traces in the window so that the traces
are better displayed in vertical grids of the window.
b) Reference setting zone
➢
[Position] button
The reference position refers to the position of the reference line in the rectangular coordinate figure. The position
of the bottom line in the figure is 0, the position of the top line is 10, and the default value of the reference position
is 5.
➢
[Level] button
The reference value refers to the value of the reference line in the rectangular coordinate format, and the value of
the excircle in the polar coordinate and Smith chart format. The setting range is -500dB to +500dB in the
logarithmic amplitude format.
4.8 Observation of Multiple Tracks and Opening of Multiple Channels
A convenient method is provided in the pre-configuration function of the analyzer for multi-trace, multi-channel
and multi-window measurement. The analyzer has four preconfigured measurement settings. If one kind of setting