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2. RADAR, CHART RADAR OPERATION
2-49
The radar is automatically set as follows when the performance monitor is activated.
*
1
Gain is automatically set according to [PM GAIN ADJ] if it was adjusted at installa-
tion.
*
2
North-up RM is selected when the mode is North-up TM.
*
3
The setting is not memorized.
*
4
The performance monitor is deactivated if the range is changed.
How to check radar performance
The range scale is automatically set to 24 NM. The radar screen will show arcs. You
can set the number of arcs. If the radar transmitter and receiver are in good working
order in as much as the original state when the monitor was turned on, the innermost
arc should appear between 8.0 NM and 19.8 NM. The performance monitor can ob-
serve a total of 10 dB loss in the transmitter and receiver.
Note 1: The location of the arcs changes with the setting of [ARC].
Note 2: When [ARC] (the number of arcs) is set to [0] (see "How to set the number of
arcs" below), there are no arc indications. Only the performance monitor graph is dis-
played in the information box.
How to set the number of arcs
1. Open the menu then select the [1 ECHO] menu. Select [6 PERFORMANCE MON]
(B type) or [5 PERFORMANCE MON] (IMO and A types).
2. Select [0], [2], [3], [5] or [6] in [ARC].
Item
Setting at activation
of PM
Adjustable while PM
is active
Setting at deactivation
of PM
CONDITION Setting stored No Setting before activation
CUSTOMIZE
ECHO
Grayed out, setting
stored
No Return to active display
EAV OFF No Setting before activation
ES OFF No Setting before activation
GAIN
70 *
1
Yes*
3
Setting before activation
IR OFF No Setting before activation
LOW LEVEL
ECHO
Setting stored No Setting before activation
NOISE
REJECT
OFF No Setting before activation
OFF center OFF Yes Setting at deactivation
Presentation Mode
Setting stored *
2
Yes Setting at deactivation
PULSE LONG No Setting before activation
RAIN 0 No Setting before activation
RAIN AUTO MAN No Setting before activation
RANGE 24 NM, 24 SM,
48 km, 48 kyd
Yes *
4
Setting at deactivation
SEA 0 No Setting before activation
SEA AUTO MAN No Setting before activation
TUNE AUTO No Setting before activation
VIDEO
CONTRAST
4B No Setting before activation
WIPER OFF No Setting before activation