How To Automatically Set The Equipment; Manual Timing Adjustment; Examples Of Wrong And Correct Sweep Timings - Furuno 1835 Installation Manual

How to automatically set the equipment

The equipment automatically adjusts the tuning, timing and video.
Note: Before you do this procedure, tramsmit the radar more than 10 minutes on a long range and
check that Sector Blank is OFF.
1. Transmit on the maximum range.
2. Select Auto Install Setup from the installation menu and press the ENTER key.
3. Press on the cursor pad to select Yes, then press the ENTER key.
The tuning adjustment begins automatically, and the indication "Tuning adjusting" appears
during tuning adjustment. After the tuning adjustment is completed, the timing and video are
adjusted in that order. The indications "Timing adjusting" and "Video adjusting" appear during
those adjustments. After all adjustments are completed, the window disappears.
If the result for any item is not best for your conditions, manually adjust the item accord-
ing to the procedure in this section.

Manual Timing Adjustment

This adjustment gives correct radar performance on short ranges. The radar measures the time
required for a transmitted echo to go to the target and return to the source. The received echo
appears on the display according to the measured time. The sweep must start from the center of
the display.
A trigger pulse created in the display unit goes to the antenna unit through the signal cable to ac-
tivate the transmitter (magnetron). The time taken by the signal to move to the antenna unit chang-
es, according to the length of the signal cable. During this period, the display unit must wait before
the radar starts the sweep. When the display unit is not adjusted correctly, the echoes from a
straight object will not appear as a straight line. The target appears "pushed" or "pulled" near the
picture center. The range to objects are shown at wrong distances.
(1) Target pulled
1. Transmit on the shortest range, then adjust the gain and the A/C SEA.
2. Visibly select a target that creates a straight line (harbor wall, straight piers).
3. Open the Installation menu and select Timing Adjust.
4. Press the ENTER key to show the setting window.
5. Press or to make straight the target selected at step 2, then press the ENTER key to fin-
ish.
(2) Correct

Examples of wrong and correct sweep timings

(3) Target pushed outward
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