Honda Electronics HE-1501, Operation Manual

Page: 90 / 128

82
TO ADJUST SENSITIVITY
1
In case of single frequency display
This describes operation for single frequency display.
※
You can change sensitivity with GAIN 1 key or GAIN 2 key.
※
Single frequency display or dual frequency display is selected on menu. (
→
page 81)
※
When the unit is delivered from factory, dual frequency display mode is set.
[Gain]
This adjusts the sensitivity to distinguish the
bottom or fish school easily. 32 steps of
sensitivity from 0 to 31 is displayed in bar.
Optimum sensitivity is that second reflection
from bottom is barely displayed.
[Second reflection]
First received echo reflected from bottom is
called the first reflection. It’s first reflection
reflected from the surface of water goes toward
the bottom
【
To decrease sensitivity
】
Each time when you press
key, gain bar
becomes short and sensitivity decreases.
【
To increases sensitivity
】
Each time when you press key, gain bar
becomes long and sensitivity increases.
GAIN1 key