CVS-841/851
Chapter
5
Basic Operation
To use:
(1) Press the IR key. Pop-up window will
appear here on the screen.
(2) Press the UP or DOWN arrow key to
change the IR setting that varies from OFF,
IR
0
5 0
1 0 0
1 5 0
2 0 0
2
OFF
1
Interference Reject
0 0
0
0
Shift
Image Speed 1/1
2001/05/23 (Wed) 14:22:56
High
1 (Mid) and 2 (Intense).
Figure 5.23 The IR Reject select display
5.7 Operating the SHIFT key
In NORMAL mode screen, there are two shift modes available, Fix Shift and Normal Shift. In Fix Shift
mode, a viewable depth is fixed with starting depth and the fixed depth scale. In Auto Shift mode, the
sea bottom always appears within the screen whereby sounding range varies in order to keep the
sounding image shown within the screen. In practice, when the sea bed becomes shallower reaching
40 % of the depth range, the image will be reset causing the sea bed depth displayed at approximately
60% of the entire range. When the sea becomes deeper and the bottom falls to 90 % of the depth
scale, the picture resets to the same position (60%).
5.7.1 Setting Fix Shift mode
(1) Select a depth range scale to allow the sea bottom to be shown.
(2) Press the SHIFT key.
(3) Press the left or right arrow key to select a digit of the shift start depth, which is shown on the top
of the screen.
(4) Enter a depth value by pressing the up or down arrow key.
(5) To cancel the Fix Shift function, press the SHIFT key again.
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