Raymarine DSM250, Owner'S Handbook Manual

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1-2 DSM250 Digital Sounder Module
The DSM250 features dual frequency (200 kHz and 50 kHz)
operation and—depending on the transducer installed and condi-
tions—up to 1000 watts RMS output power and performance
from 3 ft (1m) up to 5000 ft (1700 m).
This handbook describes DSM250 functions and how to use
hsb 2
PLUS Radar, Chartplotter, or Fishfinder display unit controls to
operate sonar operations. Controls that are specific to either
Radar, Chartplotter, or Fishfinder display unit functions are not
described in this document but can be found in the handbook for
that display.
Note: Many illustrations in this handbook show example screens.
The screen you see on your display depends on your system configu-
ration and set up options, so it may differ from the illustration.
How to Use This Handbook
If you are installing the DSM250 yourself, you should read
Chapter 2 before you start the installation.
For an overview of the display unit controls, read Chapter 5 .
Chapter 3 will help you start using your system.
For detailed information on sounder module operations, refer to
Chapter 6 .
To change the system set up default settings, read Chapter 4 .
Chapter 1 gives an overview of the display unit controls and
sonar operation.
Chapter 2 provides planning considerations and detailed instruc-
tions for installing the DSM250 and connecting the unit to the dis-
play unit via
hsb
2
.
Chapter 3 provides instructions for setting up your system to suit
your preferences. You should read this chapter to determine how
to change the sonar system from the default settings.
Chapter 4 shows how to start using the display and viewing sonar
echo data.
Chapter 5 details operating the display unit’s controls in Sonar
mode.