Koden CVS-852 - Changing the Display Position in the 3-Division Screen

Chapter 5 CVS-842/852/843
Basic Operation Operation Manual
93132692-00
5.2.5.2 Setting the STC Amplitude
In this mode, you are reducing receiver sensitivity in time proportional law with STC depth fixed. This
mode is useful in shallow water fishing to gain a better view of a school of fish near the sea surface.
C
B
A
STC
Depth
STC Amplitude
Max
Max
BC
A
Figure 5.11 Adjusting the STC amplitude
Operational notes for STC amplitude adjustment
(1) STC law A: STC is not enough, causing noise and unwanted residual weak echoes in shallow
and mid depth zone to be shown.
(2) STC law B: STC is appropriate, causing unwanted echoes to be perfectly reduced while schools
of fish are shown without degradation.
(3) STC law C: STC is too much, causing the echoes from fish school to be reduced too much.
5.2.6 Setting the ENHANCE function
Enhances the picture presentation by narrowing the dynamic range of sonar video signals. Rotating
the ENHANCE control to the right causes the seabed and fish echoes to be displayed in dominant
colors like red, orange, yellow, etc. for better recognition. Rotating the control to the right causes the
shades of colors to be widened for better definition of image colors.
NOTE: Before using this function, the MODE switch must be set to USER 1 position. To change the
dynamic range, refer to Para. 7.3 “Setting the Enhance effect”.
Enhanced image
0
50
100
150
200
High
2001/05/23(Wed
Image Speed 1/1
14:22:56
Shift
000 0
EN
0
50
100
150
200
Normal image
Figure 5.12 The effect of enhance control
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