Chapter 2 — Quick Start Guide 2-7 Soft Key Types
MS20xxA VNA Master UG 10580-00166 Rev. C 2-7
Soft Keys
These eight gray keys have no labels. They are arranged adjacent to the measurement display
screen along the right-hand edge. They are positioned to accompany virtual soft key labels
that are displayed to match instrument modes and measurement functions. These soft key
labels (also called the Active Function Block) change as instrument measurement settings
change. The following soft key descriptions describe how these keys are used:
2-7 Soft Key Types
Select
A Select soft key has a small circle in the upper right corner of the virtual key face and is used
to select the function or item that is displayed on the virtual soft key label. When not selected,
the circle is gray. When selected, the circle is red to indicate that the function is active.
Press the key to make the selection. Press a different key to make a different selection.
A
Select soft key may also be a Switching soft key. These keys show both a gray circle and an
arrow mark (-->).
A
Select soft key may change to a Switching soft key when active. These keys show only the
gray circle when not active, but show the arrow mark as well as the red circle when active.
Refer to section “Switching” on this page.
Input
An Input soft key is used to select an item or a value. This type of soft key displays the setting
parameter and the setting value on the virtual key face. When the key is pressed, a select box
or edit box may open on the display screen, or the key face may turn a darker gray color to
show that the setting is being made. At any time before finalizing the input, press the escape
(
Esc) key to abort the change and retain the previously existing setting.
To set or select an item or a value, use the number keys, the arrow keys, or the rotary knob.
Press the rotary knob or the
Enter key to finalize data input. If a value is being selected or
entered, then the soft key Active Function Block may change to provide one or more soft keys
for units, such a Hz or dB. Pressing a unit soft key sometimes finalizes the data input in the
same manner as pressing the
Enter key. If more than one unit key is displayed, then pressing
the
Enter key without first pressing a unit key selects a specific unit by default.
With some functions, only a specific set of values are valid. When scrolling with the
Up/Down
arrow keys or the rotary knob, only valid values are offered. If different values are set with
the number keypad, then those values might not be accepted. Even if different values are
accepted on the soft key face, the values may not be valid for the selected measurement.
Toggle
A Toggle soft key displays the setup item and the toggle states. Toggle states may be On and
Off or may be a selection of types or values such as Data Points: 137, 275, or 551.
Each press of the
Toggle soft key moves the selection to the next value or item in sequence.
The selected item or value is underlined on the virtual key face.
10580-00166C.book Page 7 Thursday, February 21, 2008 12:52 PM
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