Furuno NAVNET 1752C - Manual (Page 36)

2. RADAR OPERATION
2-2
2.2 Transmitting, Stand-by
1. Turn the power on. The products information appears and is then followed by
the radar screen. You can display the radar screen at once by pressing the
any key.
2. Press the [POWER/BRILL] key momentarily.
3. Press the RADAR STBY soft key to highlight TX on its label.
4. When the radar picture is not required, but you want to keep it in a state of
readiness, press the [POWER/BRILL] key momentarily followed by RADAR
TX soft key.
5. Press the RETURN soft key to finish.
2.3 Tuning
The radar receiver can be tuned automatically or manually, and the default
tuning method is automatic. To adjust manually or switch to automatic tuning, do
the following:
1. Press the [MENU] key to display the main menu.
2. Press the RADAR DISPLAY SETUP soft key.
3. Select TUNING and press the EDIT soft key.
AUTO
MAN
TUNING
¡
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Tuning bar
Tuning window
4. Choose MAN or AUTO as appropriate.
5. For manual tuning, adjust the [ENTER] knob until the tuning bar is at its
longest position.
6. Press the RETURN soft key.
7. Press the [MENU] key to close the menu.
Note:
If the auto setting does not provide satisfactory tuning, see the installation
manual for how to adjust tuning.
2.4 Adjusting the Gain
The [GAIN] key adjusts the sensitivity of the radar receiver. It works in a manner
similar to the volume control of a broadcast receiver, which amplifies received
signals.
The proper setting is such that the background noise is just visible on the screen.
If your gain setting is too low, weak echoes may be missed. On the other hand
excessive gain yields too much background noise; strong targets may be missed
because of the poor contrast between desired echoes and the background noise
on the display.