OmniTek 2.3 User Manual

ROI Controls 

The top set of controls let you zoom the Vector Scope in on any portion of the display. 
Once zoomed in, you can adjust the horizontal and vertical position, allowing you to see 
all areas, not just the centre of the Vector Scope.  

You can also zoom into the selected area by clicking and dragging over the Vector Scope 
(using the right mouse button) then return to the unzoomed display by double clicking the 
right mouse button over the Vector Scope. Also the area selected is automatically 
adjusted as the Region of Interest is changed (see page 63) so these manual controls will 
only be needed very occasionally. 

Note: The Vector Scope zoom works independently of the Waveform zoom controls. 

Preview Window 

The Preview window indicates the portion of the video field that you are zoomed in to. 

Look & Feel 

The Look and Feel controls adjust the filtering controls applied to the module creating the 
Vector Scope display. The three aspects of the display that can be varied are the 
brightness (Gain), the Gamma of the display and its persistence (adjusted using the 
Decay control). Note: These parameters can readily be set back to their default values by 
taking the Reset option offered in the Options menu (see below). 

These menus provide additional controls. In particular: 

The Graticule option within the Options menu lets you change between a 100% 
graticule and a 75% graticule, or to hide the graticule, or separately hide the 
graticule labels. There is also the option to allow the display to be interpreted in 
terms of the YIQ colour space by additionally showing I/Q axes. 

Reset gain/gamma/decay gives you a single menu option to select to reset 

these aspects of the display to their default values. 

Save snapshot will take the current Vector Scope data and write it to a named bitmap 
file. 

It is also worth noting a range of different resolutions that are supported, up to 1024 x 
1024. The required resolution may be selected through the Window menu.