Noise Rejector; Time Alarm; Enhanced Video - Furuno FR-1710 Operator's Manual

1.35 Noise Rejector

The noise rejector suppresses white noise,
which appears on the screen as many dots
scattered randomly over the display.
To suppress white noise:
1. Press the [MENU] key.
2. Press the [5] key twice to show the ECHO
SIG menu.
ECHO SIG
1. TGT COLOR
2. ECHO AVG
3. INT REJ
4. N REJ
5. ENHANCE
6. 2ND ECHO
7. CONTRAST
8. CLTR SWEEP
9. SWEEP LVL
0. CNTR ENHANCE OFF
Figure 1-45 ECHO SIG menu
3. Press the [4] to select OFF or ON from
the N REJ field as appropriate.
4. Press the [ENTER/SELECT] key to con-
clude your selection followed by the
[MENU] key to close the menu.

1.36 Time Alarm

The time alarm gives an aural at a predeter-
mined interval.
To silence the alarm, press the [AUDIO OFF]
key. The label T-ALM turns to normal color
and the timer is reset to initial value and starts
the count-down sequence again.
To activate the time alarm:
1. Press [MENU], [0] twice and [4] twice to
display the TIME ALARM.
TIME ALARM
1.
2. ALARM INTV
Figure 1-46 TIME ALARM menu
1-30
YEL GRN COLOR
OFF 0.5 1 2 3
OFF 1 2 3
OFF ON
OFF ON
OFF ON
1 2 3
OFF ON(LINK) ON(FIX)
1 2 3
ON
OFF 3M 6M
12M 15M 20M
2. Press the [2] key to select desired interval
(3, 6, 12, 15, 20 min) from the ALM INTVL
field.
3. Press the [ENTER/SELECT] key to con-
clude your selection followed by the
[MENU] key to close the menu.

1.37 Enhanced Video

On long ranges target echoes tend to shrink
in the bearing direction, making them difficult
to see. On short and medium ranges such as
1.5, 3 and 6 nm scales, the same size targets
get smaller on screen as they approach the
own ship. These are due to the inherent prop-
erty of the radiation pattern of the antenna.
To enhance target video, use the enhanced
video function. It enlarges target echoes in
bearing and range direction on 1.5-6 nm
scales.
1. Press the [MENU] key followed by the [5]
key twice to show the ECHO SIG menu.
ECHO SIG
1. TGT COLOR
2. ECHO AVG
3. INT REJ
4. N REJ
5. ENHANCE
6. 2ND ECHO
7. CONTRAST
8. CLTR SWEEP
9. SWEEP LVL
0. CNTR ENHANCE OFF
Figure 1-47 ECHO SIG menu
2. Press the [5] key to select OFF or ON from
the ENHANCE field.
3. Press the [ENTER/SELECT] key, and then
press the [MENU] key.
YEL GRN COLOR
OFF 0.5 1 2 3
OFF 1 2 3
OFF ON
OFF ON
OFF ON
1 2 3
OFF ON(LINK) ON(FIX)
1 2 3
ON