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Simrad SN90 Operator Manual
Context
A motion reference unit (MRU) measures the vessel's pitch and roll movements in the
sea. The information provided by the motion sensor is used by the SN90 to stabilize the
beams and the echo presentation.
A hull unit may be provided as an optional method to lower and hoist the transducer. A
motion sensor for electronic stabilization of the sonar beams is provided. It is placed
inside the Motor Control Unit. For improved operational accuracy, an external motion
reference unit (MRU) may be used.
•
: By default, the SN90 uses the built-in motion sensor. The sensor uses
With hull unit
a local area network (LAN) port on your Processor Unit. A message on the page
verifies that it is connected to the SN90 beamformer application.
If you wish to use an external motion sensor, connect it to a vacant serial port, and
set
to the corresponding COM port.
Port
•
: Use an external motion sensor connected to a local area network
Without hull unit
(LAN) or serial port on your Processor Unit.
Procedure
1
Connect the motion sensor system to an available communication port on your
Processor Unit.
This is described in the SN90 Installation manual.
2
Open the
Setup
3
On the
menu, select
Setup
Observe that the
of pages selected from the menu on the left side.
Note
If you want to use a serial line to interface the motion sensor, and no COM ports are
available, you must first release a port on the
COM port to interface the motion sensor, make sure that you do not put the same COM
port to other use on the
4
Release an unused serial port (COM) port.
a
On the left side of the
b
Observe that the available serial and network interface ports on the Processor
Unit are listed.
c
If you have a vacant COM port, select it, then select
the list.
d
At the bottom of the page, select
e
Close the
Installation
144
menu.
Installation
dialog box opens. This dialog box contains a number
Installation
page.
I/O Setup
Installation
dialog box.
.
page. If you choose a serial
I/O Setup
dialog box, select
I/O Setup
Remove
to save your settings.
Apply
.
to delete it from
381295/B
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