Furuno 1715 - Manual (Page 12)

1. OPERATION
4
1.5 Adjusting Display
Contrast, Brilliance
1. With the power turned on, press the
[POWER/BRILL] key momentarily to show
the brilliance/contrast adjustment window.
CONT: 4
LOW HIGH
BRILL:
LOW HIGH
9
BRILL/CONTRAST
TX/ST-BY - PRESS [MODE]
[MENU/ESC] : Exit.
Brilliance/contrast adjustment window
2. Press ◄ or ► to adjust contrast.
3. Press ▲ or ▼ to adjust brilliance.
4. Press the [MENU/ESC] key to escape.
Note: The radar starts up with the last-used
brilliance level after the startup screen
appears. Therefore, adjust the brilliance if it is
too low at startup.
1.6 Choosing the Range
The range selected automatically determines
the range ring interval, the number of range
rings and pulse repetition rate.
Press the [RANGE+] or [RANGE-] key to
choose the range. The range and range ring
interval appear at the top left corner on the
screen.
Range
Range ring
interval
6 nm
2
RNG 3.652nm
BRG 60.2
°
TTG 00H40M
EBL - - - .- °
VRM - - - - nm
Location of range and range ring
interval indications
1.7 Receiver Sensitivity
The gain control adjusts the sensitivity of the
receiver. It works in precisely the same
manner as the volume control of a broadcast
receiver, amplifying the signals received.
The proper setting is such that the
background noise is just visible on the screen.
If you set up for too little sensitivity, weak
echoes may be missed. On the other hand
excessive sensitivity yields too much
background noise; strong targets may be
missed because of the poor contrast between
desired echoes and the background noise on
the display.
To adjust receiver sensitivity, adjust the gain
control so background noise is just visible on
the screen.
1. Press the [GAIN] key consecutively until
the display shown below appears.
GAIN
20
[GAIN] : A/C SEA MENU
[MENU/ESC] : Exit.
AUTO : MODERATE
MANU
Gain adjustment window
2. Press ▲ or ▼ to choose AUTO or MANU
as appropriate.
Automatic gain adjustment
1) Press ► to open the automatic gain
options window.
ROUGH
MODERATE
CALM
Automatic gain options
2) Press ▲ or ▼ to choose ROUGH,
MODERATE or CALM depending on
sea conditions.
3) Press ◄ to close the window.