Skipper GDS102 - Key Operational Functions

Page 28 of 77
SKIPPER Electronics AS
Edition: 2017-06-12
GDS102 Operation and Installation Manual
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Chapter: 2 Operation
Graphics
Soft key
texts
Soft keys
Depth
range
Picture
speed
Screen
select
Day/Night Brightness
Encoder
Principal Functions.
Depth Range
The DEPTH RANGE button can be used to set the depth limit between 10 and 5000 m. The maximal
depth range can be reduced by soft key MAX RANGE, screen 7. See “Fig. 2.8. Screen 7. Interface setup
screen.” on page 20. Note: The shallower range settings will give higher resolution and therefore better
detection accuracy. If autorange function is selected, the range will be adjusted automatically when the
depth line is going outside the upper or lower screen limits. In those cases, newly selected range will be
selected so the bottom line is in the central part of the screen. New position will be optimized based on
the tendency of depth change (increasing or decreasing). The auto range function will operate down to
1600 m, ranges deeper than this must be set manually. This limitation is set to prevent erroneous noice
tracking.
Picture Speed
Picture speed may be selected from 30 seconds to 5.0 minutes per division, dening the speed of graphic
echogram update and horizontal scrolling of the screen. The pulse repetition frequency (PRF) depends on
the selected depth range, and the highest PRF at shallow depths is about 4 pings per second. Automatic
picture speed (auto) can be selected by keeping the PICTURE SPEED key pressed and rotating encoder
anti-clockwise. In this case, the screen will be updated after each transmission, therefore the picture speed
will be dependant on PRF.