Furuno GP-3500F - Manual (Page 197)

11. VIDEO SOUNDER OPERATION
11-25
11.13 Picture Advance Speed
The picture advance speed determines how quickly the vertical scan lines run
across the screen. When selecting a picture advance speed, keep in mind that a
fast advance speed will expand the size of the fish school horizontally on the
screen and a slow advance speed will contact it.
The advancement speed may be set independent of or synchronized with ship’s
speed.
Fast Slow
CAUTION
The picture is not refreshed when
picture advancement is stopped.
Maneuvering the vessel in this condition
may result in a dangerous situation.
Picture advance speed
1. Press the [MENU] key to show the main menu.
2. Press the [9] key to show the ECHO SOUNDER SETUP menu.
3. Press the [8] key to show the PICTURE ADVANCE window.
PICTURE ADVANCE
1. 2/1
2. 1/1
3. 1/2
4. 1/4
5. 1/8
6. 1/16
7. STOP
Picture advance window
The fractions in the window denote the number of scan lines produced per
transmission. For example, 1/8 means one scan line is produced every eight
transmissions. STOP freezes the display and it is convenient for
photographing the display.
4. Rotate the [ENTER] knob to select speed desired.
5. Press the [ENTER] knob.
6. Press the [MENU] key several times to close the menu.