Simrad PI44 C, Руководство оператора

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References
177
850-165085 / Rev.B
Echo presentation setup
These settings are used to set up the echo sounder presentation
parameters on the PI44. The operational parameters are set up
using the
Echo sounder setup dialogue.
To access the parameters, press the ADJ (Adjust) button when
you have an echo sounder presentation in the active window.
You can also press the
ENT button, and then select Echo
presentation setup on the Echo quick menu .
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 100%. In most cases, use a value around 60%. 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.