Raymarine RL70C, Owner'S Handbook Manual

Page: 71 / 218

Chapter 3 Standard Radar Operations 57
Adjusting Gain, Sea Clutter and Rain Clutter
Automatic adjustment of Gain, Sea and Tune is available, alternatively you can
set any of these parameters to manual and use the trackpad to adjust its value.
Rain clutter is adjusted manually using the the
RAIN
or
FTC
control.
GAIN, SEA,
RAIN
and
FTC
are accessed from the
GAIN
key;
TUNE
is accessed from the
MULTI
key.
Note : Gain, Sea and Tune can only be adjusted if the control is set to Manual
adjustment.
D3936-3
RAIN SEA
MANUAL MANUAL
FTC GAIN
O
F
F
75%
50%
O
F
F
D3935-3
LIGHT CONTRAST ALARM
ON
25%
TUNE
O
F
F
A
U
T
O
50%
When you select manual
GAIN
,
SEA
or
TUNE
adjustment the soft key icon shows
a vertical slider bar. As you press the trackpad, the value is indicated in the
slider.
When you switch
FTC or RAIN On, the soft key icon shows a vertical slider bar.
As you press the trackpad, the value is indicated in the slider.
If you change the settings, the new
GAIN
,
SEA
and
TUNE
modes (auto or manual )
and values remain set even when you turn the radar off and on again; Rain and
FTC are reset to Off at power-on. The status bar indicates which controls are
switched to Auto or On.
D3987-1
G ain, S ea and/or T une set to Auto
Status Bar
FTC on
3nm 126°T
AUTO WKS
FTC
EX
RC
GZ
IR
RR
1/2
H-UP
GST
Rain on
➤
To adjust a parameter:
1. Select a range appropriate to the adjustment you wish to make. The
optimum Tune setting varies slightly for different ranges, depending on the
pulse width used.
Adjusting Gain,
Sea Clutter and
Rain Clutter