5-4 Sonar 83/200 display
To show the Sonar 83/200 display, press DISP
and select Sonar Tab, select Sonar 83/200
and press ENT.
This shows a split display, with the 83 kHz sonar
history on the left side and the 200 k Hz sonar
history on the right side. Gain set tings can be
set independently for each frequ ency. Range
settings apply to both sections o f the display.
To change items, press MENU until the
Options menu is shown. Gain is explained
in section 4-4 Gain.
Range is explained in section 4-5 Range.
A-scope is expla ined in section 5 -5 Sonar
A-Scope display.
Data header is explained in section 5-1
Sonar display.
Split ratio is explained in section 5-2
Sonar Zoom display.
5-3 Sonar Bottom display
To show the Sonar Bottom display, press DISP
and select Sonar Tab, select Sonar Bottom
and press ENT.
This shows a split display, with the sonar his tory
on the right side and the zoom sectio n on the
left. The bottom signal is shown a s a flat trace
in the centre of the zoom section.
Showing the bottom as a flat trace can ma ke
it easy to compare the echo strengths shown
in the bottom signals. This can help to id entify
the type of bottom and object s close to the
bottom.
The zoom bar can only indicate the zoom
range. It cannot indicate the zoom of fset as
this changes for each sounding displ ayed on
the display.
The zoom bar is fixed in the middle of the
display.
See section 4-5 Range, for info rmation about
adjusting the Zoom Range and Zoom Off set.
To change items, press MENU until the
Options menu is shown.
Gain is explained in section 4- 4 Gain.
Range is explained in section 4-5 Range.
A-scope is expla ined in section 5 -5 Sonar
A-Scope display.
Data header is explained in section 5-1
Sonar display.
Bottom lock and Split ratio are
explained in section 5-2 Sonar Zoom di splay.
5-5 Sonar A-Scope display
The user can define the level of the weak est
and strongest echoes to be shown on the s onar
displays, by using the Gain and Thresho ld
settings. See section 4- 4 Gain, for more
information.
The strength of an echo at a particul ar depth
is shown by the length of the horizontal li ne at
that depth. A strong echo produces a lon g line
whereas a weak echo produces a short li ne.
To change items, press MENU until the
Options menu is shown.
Gain is explained in section 4- 4 Gain.
Range is explained in section 4-5 Range.
Data header is explained in section 5-1
Sonar display.
Split ratio is explained in section 5-2
Sonar Zoom display.
Divider line
between sonar
history and
A-scope
Gain setting
(strongest echo
for display)
Gain threshold
(weakest echo for
display)
To show the Sonar A-Scope display, press
DISP and select Sonar Tab, select Sonar
A-Scope and press ENT.
Use this to analyse the sonar data in detail an d
optimize the Gain settings.
FISH 4432/4433 Installation and Operation Manual 26
NAVMAN