EQ44/54 Introduction and safety summary Chapter 1-5
1.3.2 Echosounder features
A-scope - Press [ENT], [2] to toggle A-scope on/off. Echoes are displayed in a
‘bar-graph’ format. The strength of the actual echo is indicated by both width
and color intensity.
Change frequency - Press [ENT], [1] to toggle between e.g. 50 and 200 kHz.
Gain - Adjust gain with the [GAIN-] and [GAIN+] keys to just below the
point where you begin to see speckles of ‘noise’ on the screen.
Range - Select range by the numeric keys 1-9, or adjust with the +/- keys.
Key 0 will select Auto Range.
Bottom expansion* - Press [B-LCK] to call up the bottom lock display.
Activate bottom expansion to expand the view of the bottom in the
echosounder display.
VRM expansion* - Press [ZOOM] to call up the zoom display. Activate VRM
expansion to expand the view near the VRM - Variable Range Marker - in the
echosounder display. Use the up/down cursor to activate and move the VRM
line. Turn off the VRM line with [CLR].
Shift display* - Press [SHIFT] to call up the shift display when operating
in deep waters. Select the range for an expansion window. The expansion
window can automatically follow a changing bottom or be set manually by the
+/- keys.
*Return to standard echosounder display by pressing [STND].
Echo setup (presentation) - Press [ADJ] from echo display to access the setup
display for either 38, 50 or 200 kHz. Press [ENT] to confirm changes, or leave
the setup without having made any changes by pressing [MENU].
Echosounder setup - Press [MENU], [7], [STND] when you need to make
any general settings, selecting a transducer or selecting demo mode etc.
Transmit power off - Press [ENT], [STND] to stop transmission in order to
observe noise picked up by the transducer or to reduce power consumption.
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