Tuning method

Related options

Description

Enhance Echoes

INT. REJECTION:

The enhance echoes

functions:

ON — minimizes

functions enable you to

Interference

minimize the negative

 

the effect of

effects of echoes on the

 

rejection — this

 

interference from

radar display.

 

function minimizes

 

other radar-equipped

 

 

the effect of

 

vessels.

 

 

interference from

OFF — allows you to

 

 

other radar-eqipped

 

 

 

detect the presence

 

 

vessels.

 

 

 

 

of other radars in the

 

Expansion

 

 

 

vicinity.

 

 

enables you to

EXPANSION:

 

 

override the default

 

 

radar pulse length,

ON — increases

 

 

providing larger target

 

the pulse length.

 

 

returns.

 

 

 

 

This provides larger

 

Wakes — enables

 

target returns, making

 

 

you to see the

 

them easier to see.

 

 

direction and speed

 

However, larger

 

 

of moving targets

 

returns may decrease

 

 

relative to your

 

target resolution, and

 

 

vessel.

 

merge on the display.

 

 

 

OFF — this is the

 

 

 

 

default setting. It

 

 

 

 

provides better range

 

 

 

 

resolution, giving

 

 

 

 

you more defined

 

 

 

 

(but smaller) target

 

 

 

 

returns.

 

WAKES:

ON — shows the direction and speed of moving targets

Tuning method

Related options

Description

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 — does NOT

 

 

 

show the direction

 

 

 

and speed of moving

 

 

 

targets in relation to

 

 

 

your vessel.

 

Tune control

AUTO — the

The radar tuning control

 

 

default mode.

enables you to fine-tune

 

 

The radar tunes

the radar scanner’s

 

 

itself automatically

receiver for maximum

 

 

on all range

target returns on the

 

 

scales. Raymarine

display.

 

 

recommends that

 

 

 

you leave the tune

 

 

 

function in AUTO

 

 

 

mode to receive the

 

 

 

maximum signal.

 

 

MANUAL — enables

 

 

 

you to manually set

 

 

 

the tuning. Adjust

 

 

 

the control to obtain

 

 

 

the maximum signal

 

 

 

strength. If you adjust

 

 

 

the setting shortly

 

 

 

after powering up

 

 

 

the radar scanner,

 

Using radar

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Raymarine C140w, C90w manual Rejection this, Expansion, Auto