Simrad ES70 - DOWNLOAD AND INSTALLATION REV B, Руководство оператора

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Simrad ES70
3 For the relevant transducer channel, set
Mode
to Passive .
4 Click
OK
to save the current settings and close the dialog.
How to change the output power
From time to time it may be useful to reduce the output power. A reduced power
output may prove beneficial if you are looking for single fishes or schools near the
surface, if you work in very shallow waters, if you are bothered with false echoes due to
reverberation, or if you simply feel that the echoes are too strong.
Note
If you increase the output power, make sure that you do not choose more power than your
transducer can handle. With a correct setup with the transducer registered in the echo
sounder software you are safeguarded against this. However, if you use a third party
transducer that is not known by the echo sounder software, you may inflict permanent
damage if you increase the output to beyond the transducer’s capabilities.
1 Click the
Operation
icon under the
Main
menu to open the
Operation
sub-menu.
→ Operation menu on page 104
2
Click
Normal Operation
to open the
Normal Operation
dialog.
This dialog is used to define various parameters associated with the transceiver.
These settings include transceiver mode, the depth of the transducer surface, the
transmit power, and the pulse duration. Note that this dialog is not available in
Replay mode.
3 For the relevant transducer channel, set
Power [W]
to requested value.
→ About output power on page 112
4
Click
OK
to save the current settings and close the dialog.
How to adjust the pulse duration
The length of your transmitted pulse is very important to how you can detect fish.
• A short pulse duration gives you a very fine vertical resolution. This allows you to
detect scattered fish, and you can find those that move near the bottom.
• A long pulse duration throws a lot more energy into the water, and the digital filters
used by the receiver are narrower.
These filters will reduce the ES70’s sensitivity for noise, but the length of the transmitted
pulse will give you stronger echoes. With the filters, a longer pulse duration will provide
longer range, but reduced vertical resolution.
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