Operation of the EQ
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5.3 VRM expansion
This feature will provide an expanded view of the area near the
Variable Range Marker which will give a better separation of echoes.
The actual size of the expansion window can be adjusted in the Setup
display for 38kHz/50kHz/200kHz. As an example, from active echo
display, 50kHz:
MENU
Press [MENU], to call up the menu bar, and…
3,5
press
[3]
and
[5]
to activate VRM expansion of the 50kHz sounder
or…
ZOOM
gain direct access to the VRM expansion feature by pressing
[ZOOM]
The zoom level can be selected in seven steps ranging from 3 to 50
meters, or converting to feet or fathoms (refer to Setup for units,
section 7.1). The VRM horizontal line can be moved up/down by
means of the cursor.
+/-
Adjust range with the + and - keys
ENT
Open Setup display (see section 5.8), if any changes are required
ENT
and confirm changes with
[ENT]
ZOOM
Turn VRM expansion off again
T *.*°C S 0.0kn DK 5.0 m
FREQUENCY: 50kHz
PULSE: A- SHORT
POWER: A- 1000W
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