36
DSM300 Operation with PLUS Series Displays
Note:
Ensure that there is only one sonar master unit on the hsb
2
network. Having more
than one master unit will cause unpredictable results.
A sonar MASTER unit is connected directly to the transducer. Only a DSM300 or a
PLUS Series fishfinder display can be designated as the master. A REPEATER
display is connected via hsb
2
to the master unit so it can display sonar data the
master has collected. A REPEATER can be a radar, chartplotter or fishfinder
display. Because the DSM300 does not have a display of its own, the DSM300 is
always designated as the MASTER. Therefore, all display units showing sonar
data from the DSM300 must be designated as a REPEATER.
This is not an issue when showing DSM300 data on a radar or chart display
because these units can never be a sonar master. In this case, the DSM300 is
automatically set as the master and the display unit as the repeater. In fact, the
MASTER selection is grayed out when the sounder module is connected to a PLUS
Series radar or chart display.
However, if the display unit is a PLUS Series fishfinder, you are given a choice. You
must set the fishfinder display to REPEATER so that there is no conflict on the hsb
2
network (the DSM300 is always designated as a master). You would only select
MASTER when you want to control the PLUS Series fishfinder display rather than
the DSM300. In this case, the fishfinder display unit must have its own transducer
connected and the DSM300 must be powered off or have its HSB cable
disconnected (thus removing it from the hsb
2
network).
Note:
If you switch the PLUS Series fishfinder display from REPEATER to MASTER, you
must remove the DSM300 from the hsb
2
network and power off & on the display unit for
the changes to take effect.
Summary
1. When the display is a PLUS Series radar or chart unit, you can ignore this
parameter; the REPEATER setting is made for you automatically.
2. When the display is a PLUS Series fishfinder and you are using the DSM300,
select REPEATER.
3. When the display is a PLUS Series fishfinder and you want the display to show
its own sonar data rather than that of the DSM300, select MASTER.
In this scenario, the DSM300 must be powered off or be physically removed
from the
hsb
2
network.
Depth Offset
The depth offset is added to the measured depth value before it is displayed. You
can specify the depth as a positive value (WATERLINE OFFSET) or a negative value
(KEEL OFFSET). The depth offset can be set adjusted in 0.1 increments of the units
