Raymarine a Series Installation And Operation Instructions Manual page 202

Adjusting TVG manually using on-screen controls
Touch only and HybridTouch multifunction displays have
on-screen TVG controls.
1. Select the on-screen TVG control located on the left hand
side of the Fishfinder application.
2. Select the Auto box to switch between Auto and Manual
TVG.
3. Adjust the setting to the required value.
Setting auto TVG using the on-screen controls
Touch only and HybridTouch multifunction displays have
on-screen TVG controls.
1. Select the on-screen TVG control located on the left hand
side of the fishfinder application.
2. Select the Auto box to select Auto TVG mode.
3. When connected to external CHIRP sonar modules
(excluding DownVision TM
modules (excluding legacy) you can select an auto TVG
mode,
Noise Filter
The Noise Filter is available on DownVision
The Noise Filter reduces the amount of clutter displayed
on-screen by varying the gain throughout the column of water.
The Noise Filter can be set to automatic or adjusted manually:
• Automatic — In Auto mode the Noise Filter is set to 20%.
• Manual — You can adjust the Noise Filter manually, between
a value of 0% to 100%.
– A low value decreases the depth at which the filter is
applied.
– A high value increases the depth at which the filter is
applied.
The new values remain set even when you switch off the display.
Adjusting the Noise Filter
Follow the steps below to adjust the Noise Filter.
From the Fishfinder application:
1. Select Menu.
2. Select Sensitivity Settings.
3. Select Noise Filter.
The Noise filter slider bar control is displayed.
4. Adjust the Noise Filter to the required value, or
5. Select the Auto check box to switch to Auto mode.
Note: The Noise filter can also be adjusted by selecting the
on-screen N. Filter control.
Color threshold
Color threshold determines the signal strength below which
targets are not shown. Traditional and CHIRP sonar use different
colors to determine signal strengths whilst DownVision
monochrome shading.
The Color Threshold setting is a global setting. When the color
threshold value is changed all Fishfinder application panes on
all networked multifunction displays will share the same color
threshold value.
200
) and external traditional sonar
TM sonar modules.
TM
Traditional / CHIRP
Color threshold channels
100% (default)
50%
A low setting would result in only the strongest colors or lightest
shades being displayed.
Adjusting the color threshold
The color threshold's default value is 100%, you can adjust this
setting so that less colors / shades are displayed.
From the Fishfinder application menu:
1. Select Sensitivity Settings.
2. Select Color Threshold.
3. Adjust the color threshold to the required value.
4. Select Ok to confirm setting and close the numeric adjust
control.
Power mode
Power mode controls the power level of the transducer. Power
mode can be set to automatic or adjusted manually between 0%
and 100%. Power mode is only available on CHIRP, Traditional
and Legacy sonar modules.
• Auto — This is the default setting. When auto is selected
the sonar module automatically determines the optimum
setting based on the current depth, speed, and (bottom) signal
strength.
• Manual — You can adjust the power level between in 1%
increments. Lower power levels are normally used in depth
ranges less than 2.4 m (8 ft.) and higher power levels are
typically selected for depths greater than 3.7 m (12 ft.).
Adjusting the transducer power level
From the Fishfinder application menu:
1. Select Sensitivity settings.
2. Select Power Mode.
The power mode slider bar control is displayed.
3. Adjust the slider bar to the required setting, or
4. Select Auto to set automatic power mode.
uses
DownVision TM channel
a Series / c Series / e Series