Operational procedures
91
850-165085 / Rev.B
How to define echo sounder range
There are two parameters for range:
•
Range start
: This is the upper depth from which the echo
sounder will provide its presentation.
•
Range
: This is the vertical depth range for the echo sounder.
The PI44 also offers a
Phased range
function, where the
Range
is fixed, but the
Range start
is modified.
The
Range
and
Range start
parameters can be manually
controlled from the
Echo presentation setup
dialogue. In most
cases, you will however only use the buttons on the keypad.
Access to the dialogue
1
Make sure thast you have an echo sounder presentation in
your active window.
2
Press the
ADJ
button to open the
Echo presentation
setup
.
The two parameters in question are located at the top of the
parameter list.
Standard mode
In this mode, the
Range start
is fixed. It is normally set to 0
meters, and if you wish to use another value, you must define
this manually in the
Echo presentation setup
dialogue.
1
Press the
STND
button.
2
Press the
+
and
-
buttons to change the range, or
3
Press the numerical buttons (
1
to
9
) to change the range.
4
Press the
0
button to enable
Auto
range.
When you reach the upper and lower range limits, the echo
sounder will automatically shift to
Auto
range.
Phased range mode
In this mode, the
Range start
is variable, and the
Range
is
fixed.
1
Press the
SHIFT
button.
2
Press the
+
and
-
buttons to change the
Range start
value.
3
Press the numerical buttons (
1
to
9
) to change the range.
4
Press the
0
button to enable
Auto
start range.
