MODEL 1824C/1834C/1934C/
1944C/1954C-BB GD-1920C-BB
Operator’s Guide
The purpose of this Operator's Guide is to provide basic operating procedures for this
equipment. For more detailed information see the Operator's Manual.
Displays the mode selection window.
Selects a range.
Clears data; erases selected mark.
Opens/closes the alarm menu.
Enter alphanumeric
data.
Momentary press:
Registers own ship's position as a waypoint.
Press three seconds:
Marks man overboard position.
Shows or hides the soft
keys, function keys,
nav data.
VX2
DEFDEF
RANGERANGE
POWERPOWER
TXTX
ABCABC
JKLJKL
44
STUSTU
77
MNOMNO
VWXVWX
_'#_'#
GHIGHI
33
2211
PQRPQR
66
55
YZ&YZ&
99
88
00
Displays soft keys for EBL/VRM.
Radar: Displays the soft keys
for adjustment of gain, A/C SEA,
A/C RAIN.
Sounder: Adjusts gain.
Press three seconds: Turns power off.
Momentary press: Turns the power on, and
shows D: RADAR STBY/TX soft key.
Turning the Power On/Off
Turning on the power
Press the POWER/TX key momentary.
Turning off the power
Press and hold down the POWER/TX key
until the screen goes off (approx. 3 sec.)
SAVESAVE
CLEARCLEAR
ALARMALARM
GAINGAIN
EBLEBL
VRMVRM
DISPDISP
MOBMOB
PUSH TO ENTERPUSH TO ENTER
HIDEHIDE
SHOWSHOW
MENUMENU
AA
BB
CC
DD
EE
Opens/closes the main menu.
Trackball
Shifts EBL/VRM and cursor;
selects menu items and options.
ENTER knob
Push: Registers setting.
Rotate: Adjusts gain, VRM, EBL, etc.;
selects menu items and options. May also
be used to enter alphanumeric data.
Selecting a Display
1. Press the DISP key to show the display
selection window.
2. Rotate the ENTER knob to select a basic
display screen, and then push it.
3. Rotate the ENTER knob to select a
combination display.
4. Push the ENTER k nob.
Soft keys
<RADAR Operation>
Transmitting, Stand-by
1. Press the POWER/TX key momentarily
to sow soft keys.
2. Press the D:RADAR STBY soft key to
highlight TX on its label.
3. Press the E: RETURN soft key.
To return to Stand-by mode, press the D:
RADAR TX soft key to highlight STBY on its
label.
Selecting the Range Scale
Press the RANGE (+ or -) key to change the
range scale.
Adjusting the Gain
1. Press the GAIN key.
2. Press the A: GAIN soft key to show the
gain sensitivity setting window.
GAIN SENSITIVITY
AUTO ROUGH
¤
¡
AUTO MODERATE
¡
AUTO CALM
¡
MAN
0
3. Use the trackball to select AUTO
ROUGH, AUTO MODERA TE, AUTO
CALM or MAN (manual) as appropriate.
For manual adjustment, rotate the
ENTER knob to adjust, while observing
the radar echo.
4. Press the GAIN key or the E: RETURN
soft key to finish.
Adjusting the A/C SEA, RAIN
1. Press the GAIN key followed by B: A/C
SEA or C: A/C RAIN soft key to show the
appropriate setting window.
A/C SEA
AUTO ROUGH
AUTO MODERATE
AUTO CALM
MAN
A/C SEA window A/C RAIN window
0
A/C RAIN
0
2. For A/C SEA, rotate the ENTER knob to
select the appropriate setting. When
selecting MAN, rotate the ENTER knob
to adjust.
3. For A/C RAIN, rotate the ENTER knob to
adjust.
4. Press the GAIN key or E: RETURN soft
key to finish.
Measuring Range by VRM
1. Press the EBL/VRM key followed by B:
VRM1 ON (dotted ring) or E: VRM2 ON
(dashed ring) soft key to show
appropriate VRM.
2. Rotate the ENTER knob to place the
VRM on the inside edge of a radar target,
and read the VRM indication to find
range.
To erase a VRM, press appropriate VRM soft
key (B or E) followed by the CLEAR key.
Measuring the Bearing
1. Press the EBL/VRM key followed by A:
EBL 1 ON (dotted line) or D: EBL 2 ON
(dashed line) soft key to show the
appropriate EBL.
2. Rotate the ENTER knob to bisect the
radar target with the EBL, and read the
EBL indication to find bearing.
To erase an EBL, press appropriate EBL soft
key (A or D) followed by the CLEAR key.
EBL1
(Dotted)
VRM2
(Dashed)
VRM1
(Dotted)
EBL2
(Dashed)
EBL1 bearing/
VRM1 range
3nm
12/
LP
H-UP
EBL1
330.1°R
VRM1
3.123nm
EBL2
234.1°R
VRM2
9.343nm
Active marker is highlighted.
EBL2 bearing/
VRM2 range
319. 9
°
M
EBL
VRM
EBL1
A
ON
VRM1
B
ON
C
OFFSET
EBL2
D
ON
VRM2
E
ON
359.9 ˚R
+
nm
11.70
2