Furuno FCV-582L manual 49.6, 28.2, Marker-zoom display, Dual-frequency display

		50k
			0
	0.0
Fish		20
school		40

Bottom

60

Marker-zoom display

This mode expands selected area of the nor- mal picture to full vertical size of the screen on the left-half window. You may specify the portion to expand by operating the VRM (Variable Range Marker), which you can shift with the [▲] or [▼] key. The area between the VRM and zoom range marker is expanded. The length of the segment is equal to one di- vision of the depth scale.

49.680

Figure 1-7 Typical 50 kHz display

High frequency (200 kHz) display

The higher the frequency of the ultrasonic pulse the better the resolution. Therefore, the 200 kHz frequency is ideal for detailed ob- servation of fish schools.

Dual-frequency display

15

20

Zoomed fish school

25

28.2

0

10

14.7

Fish

school

20

30

Normal display

Variable range marker (green)

This section is zoomed

The 50 kHz picture appears on the left; the 200 kHz picture on the right. This display is useful for comparing the same picture with two different transmitting frequencies.

0	50/200	0
	0.0
50 kHz	200 kHz
picture	picture
20		20
40		40
60
49.6		80

Figure 1-8 Dual-frequency display

Zoom marker

Marker-zoom (yellow) display

Figure 1-9 Marker-zoom display

plus normal display

Note : The zoom marker looks like white when the background is blue.

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