Kongsberg Simrad ST90, Reference Manual

Page: 575 / 690

442704/A
573
Motion Reference Unit page
The motion reference unit (MRU) measures the roll and pitch movements of the vessel.
Some sensor models also measure heave. The information provided by the motion sensor is
used by the ST90 system to stabilize the beams.
Prerequisites
The
Installation
dialog box is not available when your ST90 system is set to Replay mode.
How to open
This page is located in the
Installation
dialog box. To open the page, select
Installation
on the
Setup
menu.
Description
The ST90 system is provided with a built-in motion sensor to provide electronic stabilization
of the sonar beams. It is placed inside the Motor Control Unit. For improved operational
accuracy, an external motion reference unit (MRU) can be used.
Use the
Motion Reference Unit
page to define the data format and the communication port
used to import motion information from an external sensor.
Note
The sensor must be connected with a serial communication line. If you don’t have any
available COM ports you must first release one on the
I/O Setup
page. Make sure that you
do not put the same COM port to other use on the
I/O Setup
page.
If you select to use the LAN port, the ST90 system will automatically use the built-in
motion sensor.
Tip
If the sensor is malfunctioning the input can be disabled. The
Stabilization
function allows
you to enable or disable the input from the motion sensor. This function is opened from
the
Setup
menu.
Functions and dialog boxes