Suppressing Second-Trace Echoes; Adjusting Brilliance Of Screen Data - Furuno FR-1710 Operator's Manual

1.33 Suppressing Second-trace
Echoes
In certain situations, echoes from very dis-
tant targets may appear as false echoes (sec-
ond-trace echoes) on the screen. This occurs
when the return echo is received one trans-
mission cycle later, that is, after a next radar
pulse has been transmitted.
To activate or deactivate the second-trace
echo rejector:
1. Press the [MENU] key followed by the [5]
key twice to display 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 1-43 ECHO SIG menu
2. Press the [6] key to select OFF or ON from
the 2ND ECHO field as appropriate.
3. Press the [ENTER/SELECT] key to con-
clude your selection followed by the
[MENU] key to close the menu.
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
1.34 Adjusting Brilliance of
Screen Data
You can adjust relative brilliance levels of
various marks and alphanumeric readouts
displayed on the screen as follows:
1. Press the [MENU] key.
2. Press the [9] key twice to show the BRILL
menu.
BRILL
1. TGT TRAIL
2. CHARACTER
3. HDG LINE
4. EBL/VRM
5. CURSOR
6. MARK
7. PLOT
8. OS SYMB
9. *
* Requires RP-17 Board.
Figure 1-44 BRILL menu
3. Press appropriate numeric key twice to
select item to adjust. For example, press
the [1] key if you want to change the bril-
liance of target trails.
4. Operate the VRM rotary control to adjust
brilliance. Current brilliance level is dis-
played on the selected item's bar graph.
The adjustment range is as follows;
1. ECHO TRAIL: 10%-50%
2. CHARACTER, 3. HDG LINE: 50%-
100%
4. EBL/VRM, 5. CURSOR, 6. MARK,
7. PLOT, 8. OS SYMB: 0%-100%
5. Press the [ENTER /SELECT] key to con-
clude your selection followed by the
[MENU] key to close the menu.
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