Boonton 4540 Peak Power Meter Quick Start - Manual (Page 9)

4540 Power Meter
Quick Start Guide
PN: 98406000A © Copyright 2008 Boonton Page 9
Soft keys
The five Menu Soft Keys are used to navigate the menu
hierarchy and to view or modify instrument settings. These keys
are active only when the menu is displayed. Each key has a
corresponding “menu box”, that changes depending upon which
menu is visible. Pressing the soft key may perform any one of
several operations, depending on the particular menu. In some
cases, the pressing the key will cause that menu item to become
“active” – the menu box will appear to be pressed in.
• Action: causes an action to be initiated, for example
“AutoCal Start”. The menu box flashes briefly when
pressed and the selected action occurs.
• Submenu: navigates down one level in the menu tree to a submenu of the
current menu. The current path down into the menu hierarchy is shown in the
Path display at the top of the screen.
• Toggle: pressing the key will toggle a value between two or more fixed
values, for example “On” or “Off”. The menu box flashes briefly when
pressed, and the selected item will toggle to the next value.
• Picklist: pressing the key will display a pop-up box showing a list of values
that may be selected for the menu parameter. The ▲ and ▼ (up and down
arrow) keys may be used to move the selector between values. Pressing
Enter accepts the selection, and Esc aborts.
• Numeric Entry: pressing the key selects the menu item for entry. The menu
box appears depressed and numeric entry is now active for that item. The ▲
and ▼ keys can be used to increment or decrement the current value, or the
numeric keypad can be used to enter a new value directly. Pressing the
menu softkey again will deselect the menu item. See the “numeric entry”
section below for more details.