Selecting The Frequency - Raytheon HSB L760 Owner's Handbook Manual

Chapter 3: Getting Started & Adjusting the Display
➤
To adjust the range and shift values:
1. Press RANGE, this sets adjustment to manual and the range soft keys are
displayed. The range adjusts up or down depending on the direction
RANGE
pressed.
2. Use the RANGE key to adjust the range: press the up arrow to select a shal-
lower range, press the down arrow to select a deeper range.
3. If necessary, press the RANGE AUTO MAN soft key to select AUTO range.
RANGE
AUTO MAN
AUTO range is indicated by the letter R in the status bar.
4. To adjust the shift, press the appropriate SHIFT soft key: use the up soft key
to select a shallower shift, use the down soft key to select a deeper shift.
The image window is shifted up by the selected amount
5. Press ENTER to return to the default display.

Selecting the Frequency

The L755/L760 is a dual frequency sonar. The two frequencies used are
50 kHz and 200 kHz. The Fishfinder automatically selects the appropriate
frequency. Alternatively, you can manually select either frequency, or both
frequencies simultaneously. Each is suitable for a particular purpose:
50 kHz Frequency
When using this frequency, the transducer scans a wide area. The 50 kHz
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 200 kHz signal is good for finding fish near the
bottom or close together. It is better for use in shallow water.
Split Frequency
The transducer can operate in both 50 kHz and 200 kHz frequencies at the
same time. If you choose split frequency operation, the scrolling bottom
display is split horizontally; the upper half shows the 200 kHz detailed view
and the lower half shows the 50 kHz image.
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