Raymarine E Series Guía de instalación Pagina 142

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6-20 E-Series Networked Display Reference Manual
6.9 What other settings affect the fishfinder image?
The system automatically adjusts the following settings in order to optimize the
fishfinder image:
Operating frequency.
Gain modes (Gain, Color Gain, TVG)
Power setting.
They should not ordinarily require adjustment. You can however make adjustments
manually if required.
Operating frequency modes
You can choose to either set the frequency to:
Automatic frequency
When operating in automatic frequency, your DSM automatically changes the
frequency from 200 kHz to 50 kHz as your depth increases and from 50kHz to 200 kHz
as your depth decreases. This mode is useful for automatically searching for the
bottom and is the normal mode of operation.
Note:
Your Fishfinder will default to automatic frequency.
Manual frequency
Manual frequency allows you to manually set the system to either a single or dual
frequency mode:
Single frequency mode
This mode sets the transducer to ping at a single frequency:
50 kHz - scans a wide area and penetrates water well. Use this setting when you
are in deep water and the DSM is locked onto a shallow target e.g. very large shoal
of fish or you are in very shallow water (<30 feet) and you need to see better fish
arches (wider cone angle).
Or:
200 kHz - scans a narrow area but produces more detail. Use this setting when you
are in deep water and the 200 kHz signal is so strong that you want to retain this
higher resolution picture. It is good for finding fish that are near the bottom or close
together.
FREQUENCY
AUTO MAN
FREQ MODE
SINGLE DUAL
SELECTED FREQ
200 50 BOTH
POWER
AUTO MAN
D6671-3
GAIN...
FISHFINDER
SETTINGS...
81244_1.book Page 20 Wednesday, December 1, 2004 11:41 AM
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