CVS-702D
Chapter 2 Basic operation
0093107022-02
2-19
2.1.5 Selection of pulse length
Pulse length can be switched to 4 steps: of Short, Medium, Long and Fixed.
This change of pulse length causes changes in resolution of images from the echo sounder
and the signal to be displayed changes. Shorter pulse length increases resolution, but its
power decreases. Other way around, longer width decreases resolution but increases power.
By this nature,
the pulse length is switched depending on the range
: to Short (narrow) at
shallow range and to Long (wide) at deep range, except for the case of setting at [Fixed].
When pulse length is switched:
1. For the setup up of pulse length, based on the setup at [Medium] as reference, at [short],
the pulse length is switched to the same pulse length as [Medium] pulse length with 1/2 of
the range used, and at [Long], to the same pulse length as [Medium] pulse length with 1.5
times of the range used.
When pulse length is set at [Short], small response increases. When pulse length is set at
[Long], larger response highlights and small response decreases.
2. When pulse length is set at [Fixed], the width is constant regardless of switching of range.
Please set at [Fixed], to avoid change of response from fish by switching of range.
To select pulse length:
1. Press [CM] key (lights red) used.
When CM1 is lit red, press [CM1] key .
2. CM menu is displayed.
3. Moving the cursor with , select [Short], [Medium], [Long] or [Fixed] of high frequency
1 in Pulse Length items.
Pulse Length
item
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