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2.7 TVG
A fish school at a deep depth is displayed in weak colors even if it is equal in strength to one
in shallow waters. This is due to propagation attenuation of the ultrasonic wave. To
compensate for this difference, use TVG. TVG automatically adjusts the gain with depth so that
echoes of the same strength and different depths are shown in the same colors regardless of
their depths. Do not set the TVG too high; close-range echoes may not be displayed
2.7.1 Setting for TVG level
Set-up for TVG level. Do not set the TVG too high; close-range echoes may not be displayed
2.7.2 TVG거리 Setting for TVG distance
TVG set up for applied distance.
< TVG level> < TVG distance >
Setting for low frequency TVG
select [display]
select [TVG(L)]
select desired level
Setting for high frequency TVG
select [display]
select [TVG(H)]
select desired level
Setting for low frequency TVG distance
select [display]
select [TVG distance(low)]
select desired distance
Setting for high frequency TVG distance
select [display]
select [TVG distance(high)]
select desired distance
