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Signal Display
7 Signal Display
The following chapter describes the selection and display
of signals from various sources as well as all available dis-
play modes.
7 .1 Display Settings
The R&S®HMO1002 resp. R&S®HMO1202 series features
a high quality TFT display with VGA (640x480 pixels reso-
lution) including LED backlighting. Basic display settings
can be defined by pressing the DISPLAY
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key in the
GENERAL section. When the soft menu item VIRTUAL
SCREEN is activated, a scroll bar will display to the right of
the display graticule. Use the universal knob to upload and
download the display window within the 20 divisions of
the virtual screen. You will find a detailed description of the
VIRTUAL SCREEN option in the next chapter.
The following settings can be selected:
❙
DOTS ONLY:
If this option is activated (ON), only the acquired data
points will be shown. This means that the data points of
all signals will not be connected by vertical lines. If this
option is deactivated (OFF), interpolated data points will
also be shown.
❙
INVERSE BRIGHTN .:
.
This setting inverts the brightness of the displayed signals.
Normally, frequently captured dots will be displayed more
brightly than rare dots. The INVERSE BRIGHTNESS option
reverses the circumstances. Rare events display a higher
brightness compared to frequent events. To capture rare
events in a signal, this setting can be used in combination
with persistence.
❙
FALSE COLORS:
This setting converts the brightness levels of the dis-
played signals to a color scale (ranging anywhere from
blue, magenta, red and yellow to white). Thanks to the
higher contrast, users can view signal details more easily.
This setting applies to all signals simultaneously.
❙
GRID:
This soft menu allows you to display the graticule as
LINES (the graticule is divided into horizontal and vertical
divisions), as CENTER CROSS (displays one horizontal
and one vertical zero line, showing the divisions as dots)
or as OFF (the entire graticule will include no dots or
lines).
❙
INFO WINDOWS:
Selecting this soft menu item will open a submenu which
allows you to set the transparency for the info windows.
Info windows are small windows that appear on the
screen depending on the particular application (e.g.
values are displayed when offset is changed). A trans-
parency value of 0% to 100% is selectable. Use the
universal knob or the KEYPAD key to define this setting.
Additional menu items allow you to activate or deactivate
the info windows for POSITION and TRACE BRIGHTN.. If
POSITION is activated and the vertical position is
changed, the respective value on the zero line will be
displayed. Depending on the selected trigger type, the
user will see specific information about the acquisition
status. This information will only be displayed if the signal
changes on the screen can persist over a longer period. If
the trigger condition has been met, the information
window shows a progress display for the post-trigger and
pre-trigger. If the trigger condition has not been met, the
information window shows the time of the last trigger
event (Trig?). If the trigger type AUTOMATIC is selected,
the instrument will switch to non-triggered acquisition
mode in case of a non-triggered condition over an ex-
tended period of time. This acquisition mode does not
display an info window as the data currently captured is
displayed.
❙
AUX . CURSORS:
This soft menu allows you to define the settings for
auxiliary cursors. Pressing the function keys enables you
to activate or deactivate the cursors. The menu item
DEFAULTS resets the default settings.
7 .2 Usage of the Virtual Screen
The graticule for the R&S®HMO1002 resp. R&S®HMO1202
series includes 8 vertical divisions but also has a virtual
range of 20 divisions. These 20 divisions may be used
entirely by the optional digital channels D0 to D7, the ma-
thematical channels and the references signals. The analog
channels may use up to ±10 divisions from the center.
Fig. 7.1 illustrates the functionality of the virtual screen.
The display includes a section of 8 vertical divisions in
gray. This section enables you to display analog signals.
The small bar next to the graticule indicates the position of
the 8 visible divisions within the available 20 divisions. By
pressing the SCROLL BAR
5
the bar will be activated and
displayed in blue and you can use the universal knob to
shift the 8 visible divisions (gray section) within the availa-
ble 20 divisions. This allows a simple and clear display of
many individual signal portions.
Fig. 7.1: Drawing of the virtual screen area