Kongsberg Flexview, Reference Manual

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Processed data formats
The following processed data output formats are available.
•
.mmb
This is raw element data, not beamformed, in a 16-bit fixed-point complex format.
This format allows great flexibility in how the data is processed and allows you to do
your own beamforming or profile-point extraction. The data body size is determined
by the number of elements and the number of samples.
•
.imb
This format consists of beamformed data in a 32-bit floating point complex format.
Data body size is determined by the number of beams and samples. Different modes
may form a different number of beams. Therefore, data body size may change
depending upon the mode.
Synchronization
•
PRI Sync
PRI Sync (set with Trigger Mode on the
Sonar Setup
page of the
System Configuration
dialog box) provides ping synchronization with another Sonar Head or other acoustic
source that supports synchronization (for example, EK60, Sidescan, DVL, etc.). PRI
Sync is a level-sensitive method of synchronization. When the sync is held high, the
sonar will not transmit. The PRI Sync INPUT must be held low for 25μs in order to
trigger the Sonar Head. The Sonar Head will transmit a 100μs sync OUTPUT pulse
when configured as
Master
on the
Sonar Setup
page. The sync OUTPUT is generated
each time the Sonar Head transmits.
•
Host Time Sync Mode
Host mode synchronizes the Sonar Head time with the computer time. This mode
is critical for Bathymetry applications. Host mode only works if the computer is
connected to an accurate time source, such as a GPS or network time server. When
connecting to the Sonar Head, it takes two minutes to synchronize the time to within
five milliseconds.
•
Computer Time Sync
If ZDA is configured, the Flexview software will use the time in the ZDA message
to synchronize the computer clock automatically in the background. However, you
may need to run the Flexview software as an administrator (right-click on the icon
and select
Run as administrator
) or Windows may not allow the software to change
the system clock. Computer time sync can be useful when data is being logged on
more than one computer and synchronized timing is required. This method is not
recommended for Bathymetry applications as it is not accurate enough.
Note
Computer time sync requires both GGA and ZDA input.
Flexview Reference Manual