Controls And Connections; Front Panel Controls - AOR SDU5500 Manual

Section 2, 2-1

(2) Controls and connections

2-1 Front panel controls

The front panel of the SDU5500 is dominated by the large LCD. Controls are 'grouped' to assist efficient
operation, there are a total of 18 keys in addition to the on/off switch and spin wheel dial.
1 Power switch
Press once to latch the switch in, switching on the SDU5500. To switch off the SDU5500, press the
switch a second time, the switch latches outward.
2 Liquid Crystal Display
The large high resolution back-lit LCD defaults to white graphics & text on a blue background with the
bottom-row functions in reverse contrast. The colours may be reversed (blue graphics & text on a white
background) and the contrast may be adjusted.
3 Function keys
Six function keys are located under the LCD. There is no 'printed legend' accompanying the keys as
their operations are defined by which menu is active on the LCD... there are a total of seven menus
numbered from 1 to 7 inclusive (the menu number is ALWAYS displayed in the extreme lower-left corner
of the LCD). This implementation is often referred to as "soft keys".
4 Spin wheel dial
A rotary encoder is provided to simplify movement of the marker position on the LCD. This is very
convenient and is the most natural method of marker frequency change. The marker is displayed as a
thin vertical line with downward / upward triangles further easing visibility. The current marker numeric
frequency reading is displayed directly above the graticule, along with signal level in dBm.
5 Numeric 'ten keys'
The entry of centre-frequency (receive frequency) is via the ten keys which are labelled to
plus decimal and enter .
6 Bail bar
A tilt bail bar is provided under the front panel (on the bottom case half) so that the SDU5500 may be
tilted upward at the front to improve visibility in certain installations.
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