How Do I Select The Operating Frequency - Raymarine RayTech RNS 5.0 User Manual

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How do I select the operating frequency?

The sonar uses dual frequency - 50 kHz and 200 kHz - to provide the optimum image at
different depths and can be used in either auto or manual modes. The frequency
setting is indicated in the status bar.
In Auto frequency the sonar automatically selects the appropriate frequency, based on
the current display range. As the depth increases, the sonar switches from 200 kHz to
50 kHz at 250 ft (80m). As the depth decreases, the sonar switches from 50 kHz to 200
kHz at 150 ft(50m). This affects all sonar widows. The Auto frequency setting is useful
for automatically searching for the bottom.
In Manual frequency the following options are available:
• Single frequency mode.
In which you select the sonar frequency that is displayed in all sonar pages.
• Dual frequency mode.
In which the transducer operates in both 50 kHz and 200 kHz frequencies at the
same time and you select the frequency that is displayed in each page. This mode
allows you to view both frequencies simultaneously using multiple sonar pages.
50 kHz frequency
When using this frequency, the transducer scans a wide area. The signal penetrates
water well, so is good for use in deep water.
200 kHz frequency
When using this frequency, the transducer scans a narrower area, but produces a more
detailed view. The signal is good for finding fish that are near the bottom or close
together and is better for use in shallow water.
To change the frequency:
1. Click
2. Click
3. Click the required frequency.
If you select Split Frequency, the screen is split horizontally, with the 200 kHz
image in the upper pane and the 50 kHz image in the lower pane.
Transducer Settings.
Frequency
. The frequency softkeys are displayed.
RayTech RNS V5.0- User's Manual