Simrad RA771UA, Instruction Manual

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TRACK, OFF-C, GZ, RINGS, GAIN, STC, FTC,
OFF), MODE, for EBL2 and
Rejection)
7
8
2
3
4 G z
RINGS
6
STC
7
Frc
9
10 MODE
11
12
13
14
a
G AI N
Select the key position by the range key, and
set the function number to the key by the control knob.
Replace the KEY-CAP (in the accessory pack) with the new
function's one.
AUTO TUNE CALIBRATION
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This mode is used to adjust the auto-tuning system for the
maximum visibility of the target echoes.
Set the mode to CALIBRATION" by the range
key, and turn the control knob to get maximum picture
visibility. In this condition, the tuning system is in
manual mode.
Then set the mode to AUTO", and auto tune system
calibration will be carried out. The calibration will take
several minutes.
When the calibration is finished, the "CALIBRATION
COMPLETED" is displayed on the screen. The auto-tunig
calibration voltage is displayed at "CONTROL" area.
(5) TIMING ADJUSTMENT
Before enter the Setup mode, set the range scale to
This mode is used to adjust the timing for distance
Set the range to or 0.25 NM,
to target.
the radar, and enter this setup mode to adjust the timing.
Then turn the control knob to decrease the diameter of the
inner ring of the bright sunspot until the diameter
becomes nil and coincides with the sunspot center.
HEAD DIRECTION ADJUSTMENT
This mode eliminates the angular difference between
the heading direction of the scanner installed on the ship
and that of the displayed picture. When the control knob
is turned clockwise, the heading marker on the picture
moves clockwise (the picture on the screen turns
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