Adjusting Display Gain (Sensitivity) - Raymarine L1250DRC Owner's Handbook Manual

Chapter 6: Sonar Operations
With color LCDs, the strongest echoes are displayed in the background color
with a thin line on top. All other echoes remain unchanged.
➤ To switch the white line feature on and off:
MULTI
1. Press the MULTI key. The WHT LINE soft key is displayed.
WHT LINE
2. Press the WHT LINE soft key to toggle the white line feature ON or OFF.
OFF ON

Adjusting Display Gain (Sensitivity)

The fishfinder provides controls for GAIN, COLOR GAIN, and STC. These
controls, accessed from the GAIN key, are used to reduce background noise
and determine how different strength echoes are shown. Automatic
adjustment of GAIN or COLOR GAIN is available, alternatively you can
manually adjust any of these parameters using the trackpad.
GAIN
Note: Automatic Gain settings take advantage the hardware's advanced dig-
ital technology. As a result, the sounder typically performs better in automatic
mode than manual. For better performance Raymarine recommends select-
ing AUTO mode for all Gain options.
If you change the settings, the new GAIN, COLOR GAIN, or STC values and
mode (auto or manual) remain set even when you turn off the display.
You adjust gain for each transducer frequency independently. Press the GAIN
GAIN
ADJUST soft key to highlight the frequency for which you are making
ADJUST
200 50
adjustments. You may change settings for one frequency while displaying the
other.
➤ To adjust a parameter:
1. Press the GAIN key. The gain sliders are displayed. The slider last used is
MULTI GAIN
highlighted (displayed in inverse video) to show that it is selected.
2. If necessary, press the GAIN ADJUST soft key to select the desired frequency
GAIN
for adjustment.
ADJUST
200 50
3. If necessary, press the desired soft key to highlight (select) the desired slider.
Press it again, if necessary, to toggle between AUTO and MANUAL modes.
4. In manual mode, use the trackpad to move the selected slider up or down.
You can press and hold the trackpad to move the slider quickly rather than
in single steps.
AUTO MANUAL
45% 75%
GAIN
ADJUST
200 50
CRUISING
COLR GAIN
A
U
T
O
STC
6-5