Chapter 1: Overview 1-19
As you press a key, a single audio beep confirms the key action.If the key-
pressis not validfor the current screen or mode, three rapid beeps sound to
indicatethat no response is available. If required, you can turn the key beeps
offas part of your set up procedure(see Chapter 7).
Soft Keys
The four keys below the screen are called soft keys because their functions
changeaccordingto the operation. The soft keys are groupedinto related sets
and subsets providing accessto the various functions.The soft key labelsare
displayedonthescreenjustabovethekeys.Thedefaultsoftkeysaredisplayed
until you press a key, orselectan item on the screen;the soft keys associated
withthe action are then displayed.
Thecurrentlyselectedsoft key option is shown by its gray background. If the
key text is displayed in gray rather than in black,it is not currentlyavailable.
When you press a soft key one of the followinghappens:
i. The associated operation is actioned, e.g. NORTH UP.
ii. A sub-set of soft keys is displayed,providingfurtherfunctions.
iii. Apop-up menu is displayed,providingfurther options.
As with dedicated keys,when you press a soft key a single audio beep
confirms the key action. If the key-press is not valid for the current screen or
mode, three rapid beeps sound to indicatethat no response is available. If
required,you can turn the key beeps off as part of your set up procedure (see
Chapter 7).
Pop-Up Menus
Pop-upmenus usually provide set up options. When a pop-up menu is on-
screen, a set of associated soft keys is also displayed as shown in Figure 1-7.
You use the trackpadto selectan option from the menu, then use the
appropriatesoft key to set the option. For example,you can toggle the OFF
TRACK ALARM on/off.
TARGETS SCREENHDG MODE
D4152-2
RDR CHRT
81186_3.book Page 19 Thursday, August 22, 2002 8:23 AM
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