Skipper GDS102 - Page 26

Page 26 of 77
SKIPPER Electronics AS
Edition: 2017-06-12
GDS102 Operation and Installation Manual
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Chapter: 2 Operation
Only one channel at a time is displayed in oscillogram window. Soft key 2 SELECT CHN can be used to
select required channel for observation.
The oscillogram on “Fig. 2.13. Screen 12. Oscilloscope screen.” on page 25 shows detected bottom signal
(next to red marker) followed by secondary and third reections of bottom signal. Lower signals at the end
of the time scale represents the noise, which may be caused by vibration, sea conditions etc.
B) Currently used transceiver settings.
The text below oscillogram window is a real-time presentation of the transceiver parameters of the currently
selected channel (by SELECT CHN soft key).
• Ping Transmitted pulse width (μS).
• Delay Time between start of the transmitted pulse and start of digitizing received signal (μS).
• Receiv. Digitizing period (μS).
• Bot. strength Digitized (8-bit) signal value of the bottom echo.
• Frq. Frequency of the currently selected channel (kHz).
C) Additional parameters.
These parameters are for diagnostics and are not adjustable in this version of the operator unit.
D) Soft key options
Soft key Name Range/value Default value Description
1 SCREEN Print Screen hardcopy, can be used for documentation and
troubleshooting.
2 SELECT CHN Ch1/ch2 Ch2\50 Selected channel enables adjustment of GAIN, TVG, POWER.
3 OFFSET -99.99 - 0.00 0.00 m
An oset can be set for each transducer channel allowing the
user to enter an oset from the keel of the vessel (negative
number) If this value is entered, the values sent in NMEA
strings DBS and DBK will reect depth from surface and
real depth from keel. DBT will reect the depth from the
transducer. See “External Printer Operation” on page 34.
4 POWER 1 - 100 (%) 50 %
Power adjustment. See “Output Power” on page 29.
5 GAIN 0 - 100 (%) Ch1: 55%
Ch2: 41%
Gain adjustment (% represents 1 - 50 dB). See”Gain and TVG
(Time Variable Gain)” on page 29 for further details about GAIN
function.
6 TVG 0 - 100 (%) Ch1: 65%
Ch2: 60%
Time Variable Gain adjustment (% represents range 10 - 50 dB
suppression). See “Gain and TVG (Time Variable Gain)” on
page 29 for further details about TVG function.
.