Furuno 1830 User Manual

Now is the time to turn on the unit and carry out the necesaary tuning and
presetting adjuatments.
INITIAL PROCEDURES
1 . Press tne touchpad on the Display Unit, and the cx>ntroI panel will
light up. In approximately 2 minutes and 30 seconds, the raessage
"ST-BY" will appear at center of the screen. While this warmup is in
ppooess, pry off the VR panel on the front panel of the Display Unit.
See Fig,l9. This will expose the potentiometers for post installation
adjustments. Push in the front panel TUNE control and release it to
bring it out. Set the control to 12 o'clock. the GAIN control at 2
o'clock, and the A/C SEA control at fully counterclockwise.
2. When the screen indieates "ST-BY" press the @ touchpad, The radar
will start transmitting on the 3-mile i-ange. and you Will probaDly see a
number of targets around you, even though the gain, tuning and other
adjustments have yet to be optimized.
3. Press the øJtl touchpad three times so that the radar is on the 24-mile
range. Bring up the GAIN control until a small amount of noise appears
on the screen. At this point, unless the tuning just happens to be at
the optimum point, slowly adjust the ooarse "TUNE" control accessible
through the VR panel, watching the screen for radar targets. (See
Fig.l9.) You must patiently adjust this coarse-tuning control in very
small inerempnts, allowing the sweep to go arourvd oomplctcly in order to
observe the effeet cf a single small change in ita setting. When you are
finished optimizing the coarse tuning control behind the VR panel, verify
that the fine TUNE control on the front panel peaks up for maximum
radar eohoes at 12 o'clock, or at least close to that point.
4. Adjust the GAIN control on the front panel, for a little background noise
showing on the screen, and then hit the |~,Q touchpad aeveral times to
bring you down to the 0.25-mile range. Without disturbing the front
panel GAIN control, adjust the A/C SEA control until nearby radar
targets are clearly shown on the screen. Too mueh A/C SEA action will
eliminate small targets, and too little A/C SEA action will cause the
screen to be so full of targets and noise that it is hard to deterraine
wbich target is wbich as compared to visual sigh tings. Note that
adjusting the GAIN and A/C SEA oontrolo in this manner (GAIN at long
range, A/C SEA at short range) will equalize the picture at all ranges,
and you will not have to jockey back and forth with the GAIN control
especially when you change range scales.
RELATIVE BEAHING ALIGNMENT
You have mounted the Scanner Unit facing straight ahead in the direction of
the bow. Therefore, a small but conspieuous target dead ahead visually
shniild appear on the hearting mark (Zero degree) .
In practice. you will probably observe some small error on the display for
most installations because of the difficulty in achieving accurate initial
posiUoning of the Scanner Unit. The following adjustment will compensate
for this error. If you don't know how to do it well , it's best you leeve
this part to a competent service technician. (Remeinber that the top radotne
fixing bolts remain untightened. They ahould now be sepured if the
following alignment is not necessary.)
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Furuno 1830 Specifications

General

Brand	Furuno
Model	1830
Category	Marine Radar
Language	English