Anritsu RA725UA, Instruction Manual

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SECTION 2 OPERATION
1
the operation level of the mode you select. In the case of AT1,
set a range of 1.5 NM or more.
key continuously to display the
MENU.
2.3
Auto/Manual
Modes
The AUTO key switches the auto and manual modes.
I
1.5 HU
2.3.1 Auto Mode
The GAIN adjustment, sea clutter suppression (STC), and frequency tuning are automatically per-
formed.The GAIN and rain and snow clutter suppression
(FTC) can be adjusted manually even
when the AUTO function is used. If you want to make very fine adjustments, use these keys during
the AUTO mode. Adjustment can also be made manually using the STC key.
The AUTO mode is divided into AT1 and AT2 submodes. AT1 and AT2 are switched each time the
AUTO key is pressed. To return to the manual mode press the STC key.
Select the one to use according to the situation as described below.
AT1
Use this mode when confirming the course in areas where strong radar echoes are returned such
as: when leaving or entering port, or when navigating in bays and narrow channels, or near small
islands. The effect is the similar to reducing the STC manually and setting relatively-low GAIN.
AT2
Use this mode when navigating in areas where there are n o objects
returning very strong radar echoes
such as in the open sea, sea clutter is also suppressed automatically. The effect is similar to
ling sea clutter manually using the STC key and setting high GAIN.
The constants (image observation degree) for the AT1 and AT2 operation levels can be changed if
necessary using the following procedure.
8
Press AUTO key to select either AT! or AT@ to change
2 Press the BRIL
SETUP