Raymarine C140w, User Reference Handbook, Page: 117 / 222

Tuning method Related Options Description
Enhance Echoes
functions:
• Interference
rejection
— this
function minimizes
the effect of
interference from
other radar-eqipped
vessels.
• Expansion —
enables you to
override the default
radar pulse length,
providing larger target
returns.
• Wakes — enables
you to see the
direction and speed
of moving targets
relative to your
vessel.
INT. REJECTION:
• ON — minimizes
the effect of
interference from
other radar-equipped
vessels. There
are two settings —
NORMAL, and HIGH.
• OFF — allows you to
detect the presence
of other radars in the
vicinity.
EXPANSION:
• ON — increases the
pulse length, giving
larger target returns
that are easier to
see. However, larger
returns may decrease
target resolution,
and merge on the
display. There are
two settings — LOW
and HIGH.
• OFF — this is the
default setting. It
provides better range
resolution,giving
you more defined
(but smaller) target
returns.
The enhance echoes
functions enable you to
minimize the negative
effects of echoes on the
radar display.
Tuning method Related Options Description
WAKES:
•
ON
— you can see
the direction and
speed of moving
targets relative to
your vessel. Targets
are displayed in
yellow, turning to
paler shades of
blue as the signal
diminishes. The
options are: 10 sec,
30 sec, 1 min, 5 min,
10 min.
• OFF — you will NOT
be able to see the
direction and speed
of moving targets
in relation to your
vessel.
Tune control •
AUTO
— the
default mode.
The radar tunes
itself automatically
on all range
scales. Raymarine
recommends that
you leave the tune
function in AUTO
mode to receive the
maximum signal.
• MANUAL — enables
you to manually set
The radar tuning control
enables you to fine-tune
the radar scanner’s
receiver for maximum
target returns on the
display.
Using radar
117