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15. Trigger type: Free.
16. Average type: Average type in BW, logarithmic power, power, voltage.
17. Preamplifier status: Enable or disable the preamplifier.
18. Average times: Average times of trace.
19. Menu title: Function of the current menu.
20. Menu items: Menu items of the current function.
21. Menu page number：Show the total number of pages and current page number.
22. Center frequency: The frequency range of the current sweep channel can be expressed
by a combination of center frequency and span or a combination of start frequency and
stop frequency.
23. Span: The frequency range of the current sweep channel can be expressed by a
combination of center frequency and span or a combination of start frequency and stop
frequency.
24. RBW：Resolution bandwidth.
25. VBW：Video bandwidth.
26. Spectrum line display area: Spectrum line display area.
27. Y scale: Label of Y scale.
28. Manual setting: The corresponding parameter is in manual setting mode.
2.5 Menu Operation
There are 6 types of menus according to their operation modes. Each type of menu and its
operation method are introduced below.
1. Parameter Input
2. State Switching
3. Enter Lower Menu (with parameter)
When selected, use the numeric keys to modify the parameters directly.
For example, select "Center Freq", input the desired figure and select
proper unit to change the center frequency.
Press the corresponding menu key to switch between the sub-options.
For example, press "Signal Track" to enable or disable the signal tracking
function.
Press the corresponding menu key to enter the lower menu and change
the option currently selected.
For example, press "AMPT" to enter the lower menu. Select dBm and
return to the previous menu. The unit of Y-axis changes to dBm.
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