Shifting The Range; Adjusting The Gain - Furuno FCV-1900 Operator's Manual

1. OPERATION
1.6

Shifting the Range

The basic range and range shifting functions used together give you the means to se-
lect the depth you can see on the screen. The basic range can be thought of as pro-
viding a "window" into the water column and range shifting as moving the "window" to
the desired depth.
Note: This function is inoperative when the auto range mode is active.
1. Press the SHIFT key to assign the range shift control function to the ENTER knob.
When you press the SHIFT key while the auto range mode is active, "N/A" ap-
pears at the upper right of the display.
2. For the user display, press the SHIFT key several times to select the display to
adjust the range shift.
3. Rotate the ENTER knob to select the amount of shift desired.
The current setting value appears at the upper right of the display.
Note: The bottom echo may be lost if the amount of shift is greater than actual depth.
1.7

Adjusting the Gain

Adjust the gain according to signal strength.
CAUTION CAUTION
Adjust the gain properly.
Too little gain may present no picture.
Too much gain shows excessive
noise on the picture.
1. Press the GAIN key to assign the gain control function to the ENTER knob.
2. For the dual frequency and user display (other than mix and zoom displays), press
the GAIN key several times to select the display to adjust the gain.
3. Rotate the ENTER knob to adjust the gain so fish echoes are clearly displayed
with minimal noise on the screen (setting range: 0.0 to 10.0).
The new gain setting is also applied to past echoes. The current setting value ap-
pears at the upper right of the display.
1-10
Window can be
shifted up and
down to select
starting depth.
Gain too high Gain too low
Gain proper