Instructions

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2.5 Touch Screen Operation
The normal mode of operation of the spectrum analyzer is by using the touch-screen keys
within the display supplemented, when required, by the hard keys below.
The touch screen keys are normally operated by pressing with the finger or thumb, but can
alternatively be operated using the supplied stylus.
2.5.1 Finger Tip Operation
The touch screen is a resistive single-touch type (rather than the capacitive multi-touch type used
on many smart phones).
It can be operated by pressing the key area firmly with the soft part of the finger or thumb.
However, for greater positional accuracy it can also be operated by pressing gently with the finger
nail.
When a key is depressed, its colour changes from blue to purple. The key action is performed when
the key is released.
2.5.2 Stylus Operation
Some users may prefer to use a stylus to operate the touch screen. The supplied stylus has a
soft point. Sharply pointed objects should never be used to operate the screen as they could
cause damage.
The stylus should be replaced into its mounting slot at the base of the instrument to prevent it
being mislaid. The stylus design is compatible with those used with the Nintendo DS handheld
games console, and spares are widely available.
2.5.3 Operation using only the Hard Keys
It is also possible to use the spectrum analyzer without touching the screen at all, by using the
five “navigator” hard keys to operate each of the touch screen functions. See section 7.2 for a
full explanation of this mode of operation.
2.5.4 Navigator Keys - Mode Selection
The five hard keys that make up the Navigator have two alternative modes of operation which
are selected by the small illuminated keys on either side.
The modes are:
Control Markers (default) - see section 4.7.2.1, and Navigate Screen - see section 7.2.
Whenever the navigator mode is changed, an information box appears explaining the current
action of the navigator keys. If preferred this can be turned off - see section 4.10.3.3.
2.6 Instrument Status Information
The most important elements of the instrument status are displayed at the top of the screen
(see Fig. 1 in section 2.4). Further status information relevant to the current menu function is
shown directly above the key area.
In addition, the full status of the instrument can be displayed at any time by pressing the hard
key marked Status/Help - see section 4.10.1.
2.7 On-screen Help
The instrument incorporates extensive help information to assist the user. Help is accessed by
pressing the hard key marked Status/Help - see section 4.10.2.