Stanford Research Systems SR780, Operating Manual And Programming Reference

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Keypad 3-25
SR780 Network Signal Analyzer
Entry Keys
To modify or examine a parameter, press the menu key which displays the appropriate
softkeys. Press a softkey to select (highlight) a parameter or function. There are three
types of softkeys or menu boxes - buttons, lists and numeric values.
The active display determines which display’s parameters are shown in the menus. Press
[Active Display] to toggle between DisplayA and DisplayB parameters. Only those
parameters which are associated with an individual display have differing values between
the displays.
When a display specific parameter is selected, the Link indicator next to the top of the
menu is turned on. If the indicator reads ‘DispA’ or ‘DispB’, parameter entry or selection
modifies only DisplayA or DisplayB. If the indicator reads ‘Link’, both displays are
modified at once. To change the Link indicator, use the [Link] key.
Buttons
Buttons are the simplest type of softkey. Pressing a button performs the specified action.
Examples of buttons are <Full Span>, <Preferences> and <Display to Disk>. Buttons
simply show a graphic ‘button’ or ‘arrow’ in their menu box.
Lists
Parameters with a list of possible selections display their current selection in their softkey
menu box. Examples of parameter lists are <View>, <Window> and <Averaging>.
To make a new selection, press the softkey to highlight its menu box. The list of possible
choices is displayed in the entry field at the top of the screen. For example, to change the
View, press [Display Setup] for the menu and then <View> (3rd softkey). The <View>
menu box will be highlighted and the View selections will be listed at the top of the
screen.
Use the knob to make the desired selection. If a vertical thermometer appears at the right
of the entry field, then the selection list is too long to display at one time. The bright bar
within the thermometer indicates the position within the complete list. Use the knob to
scroll through the entire list. Choices shown in gray are not available in the current
configuration. When the correct choice is selected, press [Enter] to change the parameter.
The menu box now shows the new selection and becomes un-highlighted.
Many parameters require the [Enter] key to enter the new selection. In these cases, the
Enter indicator next to the top of the menu will turn on while the selection is being made.
No change is made until [Enter] is pressed. To cancel the operation, press the same
softkey again (or another softkey to modify another parameter) instead of [Enter].
Some parameters do not require the [Enter] key to make the new selection valid.
<Window> is an example. In this case, moving through the list of windows with the knob
changes the Window immediately and displays the selection in the highlighted menu box.
This allows the effect of various choices to be compared while making the selection.
Press [Enter], the same softkey, another softkey or a menu key to un-highlight the menu
box when finished.