Feed count/transmission count is the relationship existing between them. For example, 2/1 indicates that
images are fed 2 times into left per transmission and 1/4 means that images are fed 1 time into left per 4
transmissions.
Relationship Between Feed Rate and Transmission Count
2/1 1/1 1/2 1/4 1/8 STOP
Fastest Slowest
IMAGE SPEED rotation
While the word is indicated, press for a proper
speed for your particular application.
Press to display the word
IMAGE SPEED
.
Every press changes speed
in the following rotation
Select word
STOP
when
stopping an image feed.
IMAGE SPEED
Speed selected
4
5
Selecting image speed
When high frequency images alone are on the screen, you can adjust high frequency gain. Likewise,
when low frequency images alone are displayed, adjustment of low frequency gain is available. When
both high and low frequency images are displayed in parallel, pressing both sides of the key
allows you to select the frequency you want to adjust. If you set any of high and low frequency to the auto
gain, the other is also set to the auto. And, if the auto gain of one of the two frequencies is reset, the auto
gain being set on the other is also reset.
GAIN Control by Frequency Level
GAIN level
Pressing the key increases the gain in 20 steps from the lowest to the highest level. If you
keep on pressing the key after the highest level is reached, the gain returns to the lowest automatic gain
level as shown below.
AUTOGAIN Minimum(1)
Maximum(20) AUTOGAIN
AUTOGAIN
: Constantly provides an optimum echo color display.
While the word is indicated, press either or arrow until
the bottom surface is displayed in the strongest echo color
Press either or arrow to display
the word
GAIN
and its gain level.
AUTO GAIN
GAIN
Gain level selected
Bottom surface
H FREQ GAIN
H FREQ GAIN
Select the
AUTO
when
turning on the gain.
1. Adjust the gain so that the bottom surface is displayed in the strongest echo color and the
color becomes weaker the higher it goes on the screen. Use care so that the strongest echo
color may not cover an excessively wide area.
2. The display color can be affected by magnitude of signals reflected by schools of fish and
others. The bottom surface may not be displayed with the strongest echo color when the
bottom is very deep or made of soft soil.
3. Make sure to adjust the gain so that schools of fish alone may be clearly displayed without
allowing noises to appear on the screen.
Adjusting gain
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