
5-14 E-Series Networked Display Reference Manual
Interference Rejection
The interference rejection function automatically reduces any mutual radar
interference when two radar equipped vessels are operating within range of each
other (see
Interference
on
page 5-5
). This function is normally left switched on,
however, if you wish to detect the presence of other radars in the vicinity, you can turn
off the interference rejection.
The two levels of interference rejection (NORMAL or HIGH) are selected in Radar Setup
Menu, see
page 5-26
. To access this menu, press and hold the INT. REJECT key.
Expansion
The expansion function overrides the pulse length if the magnification level is set to
HIGH in the Radar Setup Menu (see
page 5-26
). If the LOW setting is selected, the
processing is altered to give larger returns. This will make targets easier to see but may
compromise target resolution.
To access the Radar Setup Menu, press and hold the EXPANSION key.
Wakes
You can see the direction and speed of moving targets relative to your boat, by
selecting the wakes function.
When wakes is switched on, the target is displayed in yellow; as the signal diminishes
with time it is shown in paler shades of blue. You can select, via the Radar Setup Menu,
(see
page 5-26
) whether these wakes are shown for periods of 10 seconds, 30,
seconds, 1 minute, 5 minutes or 10 minutes. To access this menu, press and hold the
WAKES key.
When the currently displayed wakes are no longer required, press CLEAR WAKES to
remove them from your screen.
5.7 How do I change the displayed range?
You can zoom in or out to view your radar picture at varying scales. The scale is
measured from the centre to the top of the window and is displayed in the left-hand
corner of the status bar.
The scale you will need is dependent upon where you are navigating and the level of
detail that you wish to see:
• Short range scales - provide greater detail of radar echoes close to the vessel,
and are most suited for use as you approach coastlines, habors or other vessels in
the area. The shortest range scale available is 1/8 nautical miles (or the equivalent
in the chosen unit).
81244_1.book Page 14 Wednesday, December 1, 2004 11:41 AM
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