Raymarine E90W User Reference Handbook page 129

Tuning method
Tune control
Selecting digital radar gain presets
These presets require a HD or SHD digital radar scanner. Bird
mode requires a scanner with the enhanced bird mode capability.
In the radar application:
1. Press the GAIN softkey.
2. Press the BUOY MODE, HARBOUR MODE, COASTAL MODE,
OFFSHORE MODE, or BIRD MODE softkey, as appropriate.
The softkey is highlighted, and the display changes to reflect the
new mode.
Using radar
Related options
displayed in yellow, turning to paler shades of blue
as the signal diminishes. If you have changed the
color palette in use, target colors may be different.
The wake 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.
• 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
tuning. Adjust the control to obtain the maximum
signal strength. If you adjust the setting shortly
after powering up the radar scanner, you should
adjust it again approximately 10 minutes after
powering up the scanner, as the required setting
will change after the magnetron has warmed up.
Adjusting digital radar preset gain
In the radar application:
1. Select the GAIN softkey.
2. Select the BUOY MODE, HARBOR MODE, COASTAL MODE,
OFFSHORE MODE, or BIRD MODE softkey, as appropriate.
3. Select the same softkey again.
The softkeys change to provide more options.
4. Use the GAIN softkey to select the MAN option.
5. Using the rotary controller, adjust the gain control to the
appropriate setting (between 0 and 100%).
6. Press the OK button.
Description
The radar tuning control enables you to fine-tune the
radar scanner's receiver for maximum target returns
on the display.
129