Furuno GD-1700, Руководство оператора

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3. RADAR OPERATION
3-2
3.2 Transmitting, Stand-by
1. Confirm that the network radar is plugged in.
2. Press the [DISP] key to select a radar display.
3. Press the [POWER/BRILL] key momentarily.
4. Press the RADAR STBY soft key to highlight TX on its label.
5. Press the RETURN soft key.
When the radar picture is not required, but you want keep it in a state of
readiness, press the RADAR TX soft key to highlight STBY on its label.
3.3 Tuning
The radar receiver can be tuned automatically or manually, and the default
tuning method is automatic. If you require manual 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, then press the EDIT soft key.
AUTO
MAN
TUNING
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Tuning bar
Tuning window
4. Choose MAN.
5. Adjust the [ENTER] knob so 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, ask your dealer
how to re-adjust tuning.
3.4 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.
To adjust the receiver sensitivity, transmit on long range, and then do the
following: