Simrad RA771UA, Инструкция по эксплуатации

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Range Pulse /Repetition
I
0.8 600
0.5 to
.25 1800
0 . 2 5 1200
ON:
0 . 8 600)
0.08 1800 ON: 0 . 2 5
Gain Adjustment Press the GAIN key to set the
gain adjustment mode. The underline
shown below will be displayed
on
the
screen.
Indicates that the gain
adjustment mode is selected.
Turn the control knob to adjust the
gain. The gain adjustable range is
from
0
to
50.
Turning the control knob clockwise
elevates the level, enhances
reception sensitivity and makes
targets visible. Turning the
control further clockwise changes
the brightness level of echo
signals reflected from targets with
high reflection coefficients.
For
long-range observations, increase
the gain by turning the control knob
clockwise so that slight receiver
noise can be observed. (Receiver
noise usually appears on the entire
surface the display as speckled
noise.
Conversely, excessive gain at short
range
will obscure the picture with
noise and unwanted echoes. Small
targets will be concealed in the
obscure areas.
In such a case, turn the control
knob counterclockwise to the
appropriate point. The intensities
of signals reflected from targets
are expressed as changes of
brightness.
Adjustment Press the key to change the CRT
Picture Brilliance
brightness and the panel
illumination. One press varies the
brilliance by one level.
U
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