Change horizontal scale
The range of data that is visible along the horizontal scale can controlled by distance or time. As you increase these values more data is displayed in the editor.
This provides a scaling method that simulates the echo sounder paper speed controls so that the digital profiles can resemble the analogue records.
1. In the General tab, select either the By Time or By Distance option.
2. Select a range of data using the Horizontal Scale arrow buttons.
Adjust vertical scale
The vertical scale displays the distance values. The Auto setting uses the maximum and minimum soundings in the current view to set the depth values for that view. As you move along the track line, the depth values change to accommodate the visible sounding data.
You can set a scale as a ratio of the vertical scale to the horizontal scale. As the ratio is increased, the vertical display of data becomes more exaggerated.
To set a vertical scale:
1. Clear the Auto check box.
2. Click the Vertical Scale arrow buttons to select an appropriate scale.
The display in the Single Beam Editor View is refreshed to accommodate the selected scale.
Adjust horizontal labels
The horizontal labels show the depth or time values at regular intervals along the survey line. The Auto selection spaces the labels far enough apart so you can see them clearly. You can determine the spacing you want for the labels.
1. Clear the Auto check box in the Horizontal Labels section.
2. Click the arrow buttons to select a new scale for the labels. If you select By Distance for the horizontal scale, then the labels are displayed as metres/feet. If you select By Time, the labels are displayed hours/minutes/seconds/fractions of a second.
The display in the Single Beam Editor is refreshed to show the labels according to the selected settings
Display Data
The Data options set which data is displayed. The default is to show all the data types.
1. Use the check boxes to toggle the display of data on and off.
• Primary: displays primary data
• Secondary: displays secondary data
• Join Points: connects the sounding points with a line.
• Selected: displays the Selected frequency when dealing with Dual frequency data.
The display colours of the Primary, Secondary and Selected data are set in Tools > Options > Display > Single Beam.
View moving average data
You can see the moving average data in the Single Beam Editor by selecting any of the following check boxes in the Single Beam Editor.
• Data graphs the raw sounding data. This box is checked by default.
• Moving Average graphs the computed moving average from the adjacent data points as described above.
• Difference graphs the difference between the original data values and the moving average for each data point.
• Thresholds displays horizontal lines in the graph indicating the difference values that are rejected during filtering. Threshold is a multiple of the standard deviation (sigma).