In VBOX Test Suite, you can display multiple channels on their own Y-Axis, as well as overlaying channels from multiple files.
You can add a channel to the graph by selecting the Y-Axis button on the Chart tab. Click on this button to display a drop-down list of all the channels available in the loaded files. Click on the tick box next to a channel to add that channel to the active graph on its own separate Y-axis.
In VBOX Test Suite, you can overlay channels to compare the data traces on a common Y-axis. For example, when looking at vehicle speed and wheel speeds.
You can drag and drop a channel chart to the chart you want to overlay it with. Hover over the channel name to see the Drag icon appear and left-click to drag the channel chart.
The recipient chart will be framed by a green box to highlight that your channel can be added to it to produce an overlay of the signal traces.
By default, all channels will remain the same colour, however, you can change the channel colour by clicking on the chart legend and then on the colour square for the relevant channel.
You can return to the original view where all channels are on a separate axis by clicking on the Restore button to the right of the combined channel names.
If you overlay a Trigger channel with other channels, it will be rescaled depending on whether the channels are scaled automatically or manually:
- If the other channel(s) is auto-scaled, the Trigger will be rescaled to the minimum and maximum values of the channel(s).
- If the other channel(s) is manually scaled, the Trigger will be rescaled to the minimum value and 90% of the maximum value of the channel(s).
By default, all graphs will have the X-axis set to Elapsed time. You can change this at any time by clicking on the X-Axis button on the Chart tab and selecting the required channel from the available channels in the dropdown list.
By changing the X-axis from continuous (i.e. time) to discreet data, the graph will automatically change to display a scatter plot rather than a line graph.
There are many ways to navigate the Chart area in VBOX Test Suite. You can zoom in and out of a graph, pan a graph, navigate from sample to sample and more via a mixture of mouse clicks, keyboard shortcuts and menu buttons.
There are several different ways to zoom in and out on the chart.
- Click on the buttons on the ribbon in the Chart tab.
By pressing the Zoom In or Zoom Out button, the graph will zoom in/out by 5% for each click.
You can reset the graph to the default zoom level by clicking on the Reset Zoom button.
- Click on the chart to make the zoom buttons appear briefly next to the cursor.
These zoom buttons will work the same way as the buttons on the ribbon.
- Click and drag.
Left-click on the mouse and drag left or right on the chart.
By holding the left mouse button and dragging the cursor to the right, the chart will zoom in horizontally, where the Y-axis remains the same size and only the X-axis changes.
By holding the left mouse button and dragging the cursor to the left, the chart will return to its original view.
Left-click on the mouse and drag left or right on the chart while pressing Shift.
By holding the left mouse button and dragging the cursor to the right while pressing Shift, the chart will zoom in vertically, where the X-axis remains the same size and only the Y-axis changes.
By holding the left mouse button and dragging the cursor to the left while pressing Shift, the chart will return to its original view.
- Scroll Wheel
Using the scroll wheel with the cursor hovering over the chart or the X-axis will zoom horizontally.
Using the scroll wheel with the cursor hovering over the Y-axis will zoom vertically.
Auto-scaling
- Click on the Best Fit Y button to make ALL y-axes auto-scale to the minimum and maximum y values currently shown.
- Double-click on the y-axis to make the chart window scale to the minimum and maximum y values for that specific y-axis.
If there are overlaid channels, the auto-scale should include the maximum and minimum values of ALL channels on that axis.
If you have set a custom scale, this will be the zoom level the chart defaults to when you reset the zoom.
Saving a Zoom Area
When you have zoomed in on an area, you can assign the zoomed region to a number by pressing the Ctrl key and a number key (1 through 9). Once the region has an assigned number, you can zoom back to that point by pressing the number key again.
When you have zoomed in on the chart, you can grab either the X or the Y-axis and drag it up/down or left/right to pan the chart accordingly.
You can also click and hold the right mouse button on the chart and drag it to pan or select the Pan button in the ribbon and use the left mouse button to click and pan on the chart.
You can position the chart cursor in various different ways. The first and easiest way is to left-click anywhere in the chart. This will move the cursor to the location you clicked on and display the associated values in the bottom right corner of the Chart area. You can also left-click on the chart and drag the cursor left/right. The values will be updated constantly.
You can also use the arrow keys on your keyboard to move the cursor left or right, one pixel at a time. This way, you can scroll through the data continuously.
If you press the Alt key in conjunction with the arrow keys, the cursor will jump to the next sampled point rather than just scroll through the interpolated values.
Right-click in the Chart area to either copy the current view in the Chart area as an image to the computer clipboard or to save it locally as a .png, .bmp, .gif, .jpg or .tif file.
When a logged VBOX data file (.vbo or .vbb) is loaded and displayed in the Chart, any associated .wav audio voice tag files will appear below the speed data trace as speaker icons, and a vertical line will indicate the exact location of the start of the recording.
You can play the audio files by clicking on the speaker icons. The icon will animate to indicate that the audio file is being played.