Simrad PI32
154
857-164636 / Rev.A
Echo presentation setup
These settings are used to set up the echo sounder presentation
parameters on the PI32. The operational parameters are set up
using the
Echo sounder setup
dialogue.
To access the parameters, press the
ENT
button when you have
an echo sounder presentation on the screen.
Range start
: This is the upper depth from which you wish the
echo sounder shall start. This value will typically be 0 meters,
but you may for example set up the echo sounder to only present
echoes from 5 meters below the sea surface and downwards.
Range
: This is the vertical depth range for the echo sounder.
You can set it to change depth range automaticially (AUTO), or
you can define your own fixed range. The maximum range will
depend on the chosen echo sounder frequency, as the 38 or 50
kHz modes will detect echoes deeper than the 200 kHz mode.
Gain
: This is the gain in the echo sounder’s preamplifier. The
gain must be defined manually, and you can choose any value
between 1 and 95 dB. In most cases, use a value around 30 dB.
If you use too much gain, the echogram will contain a lot of
noise and false echoes.
White line
: This parameter allows you to switch the
White line
function on or off. When enabled, a band in the current
echogram background colour is inserted immediately below the
detected bottom depth.
Expansion window
: The PI32 provides a
Bottom expansion
function. When this is enabled, you can control the depth range
in the expanded window using this parameter. To enable the
Bottom expansion
function, select it on the
Echo
menu. To
disable it, select
Echo display
on the
Echo
menu.