Teleflex TFXIDF, Operation Manual

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USING THE IDF SERIES
SIGNAL INTERPRETATION
4
SIGNAL INTERPRETATION
Remember, sound waves bounce off a target and return with the strength of
its density. More dense targets (i.e. large fish) return and display a strong sig-
nal. Less dense objects (i.e. weed, schools of small fish) return and display a
weak signal. Dense objects on the edge of the cone return a weaker signal.
This
IDF Series
unit is extremely
sensitive and powerful. It will
give a very detailed representa-
tion of the environment beneath
the transducer. Information on bot-
tom hardness and content, weeds,
brush, steep slopes and fish are readily
attainable.
The Zero mark will be on at all times.
This mark represents the start of the
Sonar Depth scale, which is relative to
the placement of your transducer.
Sensitivity is adjusted using the SENS - and the
SENS + keys, the present setting adjusted and
shown when either key is depressed
5'
10'
15'
20'
As With all sonar units, experience is the best device for interpreting the target
returns accurately. To aid in the interpretation on the display, the following
examples are provided.
A hard bottom starting at 20' with a
Big fish giving a strong return at 15'.
If a fish moves horizontally through a
sonar cone, it will start at one level,
move up and then back down again
as it moves beneath the transducer.