Furuno GD-1700C - Manual (Page 151)

4. VIDEO SOUNDER OPERATION
4-7
A-scope display (display only)
The A-scope display, available in all modes, shows echoes at each transmission
with amplitudes and tone proportional to their intensities, on the right of the
screen. It is useful for estimating fish species and seabed composition. To turn
on the A-scope display, press the DISPLAY MODE soft key, select display mode
desired, then press the A-SCPE soft key to turn the A-scope display on or off as
appropriate. For the mode except SINGLE MODE the screen must be split
horizontally to show the A-scope presentation.
SINGLE FREQ DISPLAY A-SCOPE
DISPLAY
HF
50
0
100
-
-
-
-
-
-
-
-
84
Strong echo (bottom)
A-scope Display
Weak echo (fish)
No response
-
-
A-scope display
4.2.3 Selecting screen split method in combination displays
On combination sounder displays you can split the screen vertically or
horizontally, using the SPLIT soft key as below.
0.0
LF HF
0.0
LF
HF
SPLIT
/
SPLIT
/
How to use the SPLIT soft key (example: dual frequency display)