Koden CVS-852 - Page 108

Chapter 8 CVS-842/852/843
Trouble Shooting Operation Manual
A Scope
2002/02/13 (Wed)
14:22:56
Shift
High


1
1
5
5
0
0
Image Speed 1/1
000 0
Bottom detection
threshold window
(High Freq)
Bottom depth indication
High
-40
50
100
1
1
5
5
0
0
2
2
0
0
0
0
(3) Bottom detection threshold is
appropriately set
The threshold curve obtained
by reducing the threshold
level by 6.
(4) Set the threshold curve to be
tangential with the bottom echo.
(2) Setting too high (Approx 40)
A bottom is not detected.
(1) Setting too low (Approx –80).
A school of fish is mistakenly
detected as a bottom.
Figure 8.1 Setting the bottom detection threshold
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