KONGSBERG K-Sync
Echo sounders that will interfere with each other should be put into separate trigger
groups. The goal is usually to trigger each echo sounder as frequently as possible to
maximize data density. The type of survey will determine which echo sounders should
be prioritized and scheduled to ping most frequently.
Trigger display
The trigger display is a real-time display that shows the current state of each echo
sounder plotted over time. There are two plots for each echo sounder: 1) trigger plot
and the 2) state plot.
The
trigger plot
shows a pulse whenever the Synchronizing Unit is triggering the echo
sounder. This plot is blue.
The
state plot
shows the current state based on scheduling and feedback signals and state
is conveyed by its color (gray, green, red).
Table 3
Interpretation of trigger display plots.
Plot
State
Color/shape
Description
Disabled
Gray line
Echo sounder has been
disabled by operator or
the echo sounder is in
standby state (i.e. timed
out/not ready)
Ready
Green line
Echo sounder is ready to
be triggered
Busy
Red line
Echo sounder is currently
transmitting, receiving
and/or processing
samples (i.e. not ready)
State plot
Transmit
Red pulse
Echo sounder
acknowledged that
a transmit occurred
(width of pulse does not
represent the duration of
transmit pulse)
Trigger plot
Trigger
Blue pulse
Trigger pulse (width of
pulse does not represent
the duration of the trigger
pulse)
A few key points
• If a transmit occurred (and if transmitting feedback signal is available), it will always
be shown in the trigger display as a red pulse regardless whether the echo sounder
is disabled, active, or standby.
• Echo sounders that do not provide a transmitting signal will not show any indication
of transmit occurring in the plot.
• For high ping rates, the trigger display will not provide adequate resolution to show
every pulse. The plot resolution is 50 ms, so the highest pulse rate that can be shown
in detail is 10 Hz.
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