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SAMPLE PLAYBACK
It is recommended that before beginning use of the PC side scan sonar, the operator practice
playing back the sample file(s) in the program. This will help familiarize the operator with some of
the system features. To playback a sample file follow the steps below.
1. Open the SONAR VIEW program. Under the File heading on the toolbar click Open. Select the
sample file from the sample file stored on the hard disk. The default location of the sample files
is: C:\Program Files\JW Fishers\SONAR VIEW \Sample Data Files
2. Under the VIEW command at the top of the screen select the Standard Toolbar and Control
Toolbar. Both toolbars will then be shown at the bottom of the screen.
3. Click the Playback button on the toolbar on the bottom of the screen. The Playback button is the
single blue arrow pointing to the right. The saved file will begin to play.
4. Using the toolbar on the bottom of the screen, click on the invert color button and note how the
sonar image changes.
5. Change the selection on the colors menu next to the COLOR button, and note how the sonar
image changes.
6. Click the Stop button on the toolbar on the bottom of the screen. The Stop button is the black
square.
7. Click the Rewind button on the toolbar on the bottom of the screen. The Rewind button is the
double blue arrowhead pointing to the left. The double blue arrowhead with the line in front is the
Rewind to beginning of file button. Using the Rewind button the operator can rewind the file
being played to any point on the recorded file. Click the Stop button when the file is rewound to
the desired place. Click the Playback button to continue playing the file.
8. Click the Fast Forward button on the toolbar on the bottom of the screen. The Fast Forward
button is the double blue arrowheads pointing to the right. When the file is advanced to the
desired place, click the Stop button and then the Playback button to continue reviewing the file.
9. When playing back files clicking the mouse on the Fast Forward or Rewind buttons on the toolbar
will fast advance or reverse the file playback.
10. To measure a target on the screen click the measure button on the toolbar (see page 30). Hold
the shift key and click the mouse arrow on one end the target. Holding both the shift key and the
mouse button down, move the mouse arrow to the other end of the target and release the mouse
button. The size of the target (in meters) will be displayed in the signal window title bar.
11. Try using other buttons on the toolbar and note their effect on the sonar image. Some buttons
cannot be used with recorded files such as the Range, Delay, Boat Speed buttons. These pa-
rameters were set when the file was originally recorded and can not be changed during playback
mode. Controls that can be adjusted during playback are colors, gains, and threshold.
12. Select, under the View menu, Analog Signal Display. Observe the displayed analog signal that is
the result of the TVG adjustments.
When you are comfortable with the controls during playback it's time for an "in water test". Sample
Recording is next.
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