Adjusting Gain; Measuring Depth - Furuno FCV-1200L Operator's Manual

1.7

Adjusting Gain

The [GAIN] control adjusts the sensitivity of the receiver. Adjust it so excessive noise just
disappears from the screen.
1.8

Measuring Depth

Use [!] or ["] key to place the VRM on the object to measure depth. Depth is digitally
displayed above the VRM.
Note: This operation is not available when the white marker window appears (by pressing the
[!] or ["] key). Select VRM at MARKER SELECT in DISP menu to use the VRM.
Gain too high Gain proper
Examples of proper and improper gain levels
1/1
VRM (Green)
Depth to VRM
49.6
ft
How to use the VRM
Gain too low
LF
0
0
0.0
20
39.8
40
60
80
1-13