262
442700/A
Procedure
1
Make sure that you have sufficient water depth below the keel before you lower the
transducer.
2
Lower the transducer to its bottom position.
3
Select the default settings.
a
On the
Main
menu, select
User Settings
.
b
Observe the
Factory Settings
list.
c
Select the setting you want to use.
d
Select
Activate Selected Setting
.
e
Select
OK
to apply your changes and close the
User Settings
dialog box.
4
At the bottom of the display presentation, select a suitable presentation mode, and
activate the
Horizontal
view.
5
Make the following preparations.
a
On the
Main
menu: Set
Range
to
1500 m
.
b
On the
Operation
menu: Set
Tx Power
to
Off
.
c
On the
Active
menu:
1
Set
Pulse Type
to
CW Medium
.
2
Set
Frequency
to the start frequency:70 kHz
3
Set
Vertical TX Sector
to
Narrow
.
4
Set
Noise Filter
to
Off
.
5
Set the
Bottom Filter Threshold
to
Off
.
d
On the
Setup
menu: Select
Diagnostics
to open the dialog box.
6
Select
Noise
to open the page.
7
Select
Start Noise Measurements
.
a
Observe the noise curve.
b
Read the maximum and average noise values.
c
Repeat for selected frequencies.
d
Record the frequencies and the measured values in the result table.
8
Finish the test.
a
Close the
Diagnostics
dialog box.
b
Hoist the transducer back up to its upper position.
Simrad CS90 Reference Manual
Summary of Contents for Simrad CS90
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Page 684: ... 2021 Kongsberg Maritime ISBN 978 82 8066 213 2 ...
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