Digital Oscilloscope
The Digital Oscilloscope is the heart of ODIS. From this window, the user can manipulate the waveform returned from an A/D board and set up Gates to collect features.
Overview
The Scope consists of a waveform display region and controls for manipulating the results. There may be one or more display regions, depending on the number of A/D boards in the system. Each board's result is shown in a separate tab.
parameters can be copied from one channel to another. First, right-click on a channel tab and select "Copy Settings" from the resulting menu. Then right-click on the destination channel and select "Past Settings". This will copy the A/D and Gate setups from the source channel to the destination channel.
Note: if the source and destination channels are different types of A/D boards, some settings may not be transferred.
Scales
The vertical scale of the scope measures the intensity of the returning signal. The scale can be set in Volts, %FSH, or dB. To change the scale, click at the top left corner of the Scope window, at the topmost vertical units entry.
The Horizontal scale measures the time at which the signal is located. It can be displayed in either microseconds (us) or mm/inches, depending on your Configuration settings. To change the scale, click on the lower left corner of the scope, where the horizontal units are displayed.
Mouse Controls
There are a number of mouse modes available on the scope. In order to switch between them, the user moves the mouse over the scope window and right-clicks the mouse button to rotate through the controls. The controls available are listed below.
Zoom
The user can zoom in or out on the scope using two methods:
- use the Magnify Tool (
) To zoom in and out by left-clicking on the scope, holding the left button down, and move the mouse up and down. The point at which the user clicked will remain the "Center" of the zoom as the user moves the mouse. - use the I-Beam Tool (I) to select a region of the scope on which to zoom. To make the selection, left-click and old the mouse on the scope, drag the mouse over the desired zoom selection, and release the mouse when done.
Pan
The user can pan the scope back and forth to see different positions in time. The pan control is the hand icon (
). To pan the scope, left-click on the scope with the hand tool and hold the left mouse button down. Move the mouse left and right to pan the scope.
Gates
A user can click and drag on gate to move or resize them using the mouse. The Gate selection mode is the Arrow icon (
). Gates have grab points at the left, right, and middle of the gate. Usually the leftmost point will move the gate, the middle point will change the gate threshold, and the rightmost point will change the gate length. Other points may be available depending on the gate type.
See Also: Gates
Toolbars
Controls
A number of controls can be made visible by pressing on the Controls button at the top left of the scope form (
). These controls are subdivided into tabs based on the type of settings being manipulated.
Gate Settings
See Gate Settings.
Board Settings
See Board Settings.
FFT Settings
See FFT Settings.
Filter Settings
See Filter Settings.
TGC Settings
The TGC Settings tab is where Time/Gain Corrections are made to the ultrasonic waveform. This lets the user compensate for signal loss as the sound travels deeper into the material of the part.
See: Time/Gain Correction (TGC)
Diagnostics
If Diagnostics are enabled, a few extra features are present.