Reson SeaBat 7125 SV2, Operator'S Manual

Page: 124 / 212

ACTIVE SONAR USAGE
SeaBat 7125 SV2 Operator‟s Manual
Page 108 July 25, 2011
Version 3
Figure 45: Head Tilt for Pipe Inspection
6.4 Use of Displays
6.4.1 Wedge versus B-Scan Display
The sonar wedge is the default view of the SeaBat sonar system. Change to B-scan
view when operating long distance. For further details on wedge and B-scan displays,
see
section 5.3 Primary Display Tab .
6.4.2 A-Scan, Phase and Magnitude Displays
With the A-scan displays it is possible to analyze the signal in a single beam (or group of
beams) to determine whether the bottom detection point is trustworthy.
The magnitude display is suitable to use for analysis of the middle beams and the phase
display is suitable to use for analysis of the outer beams of the swath. Signal Operator
Mode must be selected to make the phase display available (see
section 4.2.1 Data
Display & Format ).
For instructions on how to switch between the available A-scan displays, see
section
5.3.2.1 Available Displays .
6.5 Water Column Data Recording
Users wishing to record beamformed intensity data at the full sample rate, henceforth
referred to as water column mapping, must first configure and supply the sonar system
with transducer positioning, motion, and heading data streams for coalescence with
sonar data during postprocessing. For instructions on how to interface this device data to
the SeaBat I/O module, see
section 4.5.2 Adding a Device .
Water column data can be collected in both Signal Analysis Mode and Operator Mode.
For further details on these modes, see
section 4.2.1 Data Display & Format .
Water column data recording may be performed using one of two methods.