Series 3000 Sonar System Towfish Setup
4-81
System State.
Select
Running
or
Paused
. These options function the same as
the
Play
and
Stop
buttons on the Sonar Viewer and Sub Bottom Viewer tool
bars.
TVG Offset.
This setting should only be changed if you are having
unsatisfactory results with the tuning or if you are working in unusual
conditions, such as extremely soft mud. There is a setting for each the low and
the high frequency with 0 dB as the default.
Total Cable Length.
Determines the gain setting of the telemetry system in
the towfish. This setting should only be changed with instructions from the
factory.
Despeckle Sonar Image.
Filter settings to smooth sonar images. For the
highest resolution, select
Off
.
Towfish Speed.
Accurate speed input is necessary for the sonar system to
work properly. The system should always be used with a speed input device
such as a GPS receiver. A manual setting is available should a failure occur.
Speed of Sound.
The speed of sound in water. This setting may be adjusted
for special conditions.
Framing Mode.
Selects whether to acquire sonar or sub bottom data or both.
Sub Bottom Settings.
Selects the chirp pulse length for the sub bottom sonar
if installed. The available settings are dependent on the range setting. To turn
off the chirp transmitter, select
Off
.
Pre Amp Gain.
Selects either low or high gain for the sub bottom
preamplifier.
The
Responder Control
tab shown in Figure 4-95 is used when the towfish is
equipped with an optional responder. Set the responder ping rate and the responder
frequency here.
The
Towfish Diagnostics
tab shown in Figure 4-96 is used for testing the system.
The
Operator Command
area of the dialog box allows you to send specialized
commands to the towfish. Refer to APPENDIX D: “General Setup, Configuration
and Troubleshooting,” for more information on using this dialog box.
NOTE
The sub bottom sonar acquires data to a maximum range of 250
meters. In addition, the available chirp pulse length selections are
dependent on the range setting.
Summary of Contents for SERIES 5000
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