Sonic KCS-3500, Руководство по эксплуатации

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5.3.4. DISCRI
You can set a DISCRI to select a desired mode for signal processing of the sonar images.
There are five DISCRI settings; “SOFT”, “MEDIUM1 ,”MEDIUM2”, “HARD1” and “HARD2”.
This system has been set at the factory before shipment so that in the “SOFT” setting, the
signal processing will be the weakest. The signal processing will be intermediate between
SOFT and HARD; and in the “HARD 2” setting, the signal processing will be the strongest.
You may select the setting in accordance with the type of fish and your preference.
5.3.5 PP FILTER
The PP FILTER is used to eliminate the acoustic noise from other ships, random noise
and/or the sea clutter generated during bad sea conditions.
There are five PP FILTER settings; “SOFT”, “MEDIUM1”, ”MEDIUM2”, “HARD 1” and
“HARD2”. This system has been set at the factory before shipment in the “SOFT” setting,
and interference elimination will be the weakest. The interference elimination level will be
intermediate between SOFT and HARD; and in the “HARD 2” setting, the interference
elimination will be the strongest.
If you use a filter of higher performance for eliminating the noise, the smoothness of the
images may deteriorate, so it is recommended to use the “SOFT” under normal conditions.
5.3.6 TX POWER
You can change the TX POWER in the range from 0 to 10. When you set the TX
POWER to “0”, the transmission will be stopped. When you set it to “10”, the TX POWER
will be the highest. The larger the value, the larger the TX POWER will be and the wider
the searching range will be.
5.3.7 TX PULSE
You can change the TX PULSE in the range from 1 to 10. “1” is the minimum TX pulse
width and “10” is the maximum TX pulse width. It is recommended to use a short pulse
width, when you want to detect a fish school in the shallows or when you want to confirm
the density of a fish school.
5.3.8 TX SYNCRO
Synchronization of the sonar operation can be set. If synchronization is set to “Internal,”
the sonar operates with its own synchronization, and if it is set to “External,” the sonar
operates in synchronization with external signals. When there is a lot of interference such
as fish detectors, ensure that the external signal is input from the fish detector, and
perform the external synchronous operation.