Garmin CS 1522, Руководство пользователя

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2.4 Optimizing the Sonar Display 35
Split Zoom
Select Split Zoom to toggle a split screen on/off and opens the Sonar Zoom menu. You
can continue to select a second zoom option for the split screen on the left, keeping the
original zoom option on the right.
NOTE: Not available in Split Frequency modes.
2.3.4 Hiding Overlay Data and Depth Scale
The overlay data may obscure your view of the returns. To temporarily hide the overlay
data and the depth scale, press and hold [BACK] .
All overlay data and the depth scales will be hidden while the button is held.
2.4 Optimizing the Sonar Display
2.4.1 Adjusting Gain
Gain controls the level of detail and noise shown on the sonar display. A higher gain
setting amplifies the signals received and reveals more information, but also increases
noise and clutter shown on the sonar display, and can make it more difficult to recognize
actual returns. You can lower the gain to remove lower intensity returns and noise.
Low Med High
• Rotate the [GAIN] knob to adjust the gain and reduce noise on the screen.
• Press the [GAIN] knob to open the Gain menu. Rotate and press the knob to make a
selection.
• You can also adjust gain by pressing [MENU] > Sonar Setup > Gain (see 3.2.1 ).
TIP: From a high level of gain, gradually reduce gain until the noise are barely showing on
the sonar display.
2.4.2 Adjusting Echo Stretch
In Traditional and Split Frequency modes, you can increase echo stretch to expand the
echoes on the screen to make it easier to see separate returns on the sonar display. The
value ranges from -10 to 10. If the value is too high, the targets blend together. If the value
is too low, the targets are small and more difficult to see.
• Rotate the [ECHO STR] knob to expand or contract the echoes.
• Press the [ECHO STR] knob to set the value to 0.
• You can also adjust contrast by pressing [MENU] > Clutter > Echo Stretch (see 3.3.6 ).