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7
Further Notes on Operation
7.1 Operation using the Hard Keys Only
Although the instrument is designed to be operated via the touch
screen, it is also possible to operate it using only the hard keys.
This may be appropriate in particular circumstances such as
when the user is wearing gloves.
Hard-key-only operation is activated by pressing the circular
button marked Navigate Screen which then illuminates. This
changes the function of the five Navigator keys from controlling
the Markers to controlling the position of the on-screen key
highlight.
The highlight position is shown by a change in the key color to purple. Pressing the centre
button operates the key.
Almost all menu functions can be operated in this way. Pop-up menus and other special
function screens can be exited by pressing the EXIT hard key. An exception is the Set by
Tab/Jog function, described in section 7.2.2 , where the horizontal and vertical navigator keys
operate the tab and jog functions respectively.
Note that, if a touch-screen key is pressed directly, the "hard-key only" mode is cancelled and
the Navigate Screen button ceases to be illuminated. To re-enable the mode, the button must
be pressed again.
Whenever the navigator mode is changed, an information box appears similar to that shown
above. If preferred, this reminder can be turned off - see section 4.10.3.3.
7.2 Setting Frequencies
The control screens used for setting frequencies are common to Set Centre, Set Span, Set
Start, Set Stop, Set Step and Marker Manual Set. The following illustrated example is for Set
Centre but is similar for all other frequency setting functions.
pressing this key will bring up either the Set by Keybd (set by keyboard) screen or
the Set by Tab/Jog screen depending upon which one was last used for setting that
frequency parameter.
7.2.1 Set by Keyboard
This control screen replaces the menu with a 0 to 9
keyboard. The frequency is entered in MHz using
the decimal point if required (maximum resolution
0.001MHz). Frequencies can be entered in whole
MHz when kHz resolution is not needed.
Entry errors can be corrected with the back-space
key (
).
Pressing OK sets the entered frequency without
leaving the control screen. The frequency value is
cleared ready for entering a new value.
Pressing OK & Exit sets the entered frequency and
returns to the menu.
Pressing Exit/Cancel returns to the menu without setting the entered frequency.
Pressing Previous returns the frequency to the value directly prior to the last frequency entry.
Pressing Tab/Jog changes to the alternate control screen as detailed below.
Set
Centre