Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Radar/Chart Radar User Guide Basic Operation of Radar
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Always use the control with great care. Excessive suppression can
cause loss of small targets. It is often advantageous to use this
control to search for targets in the clutter region, returning the
control to zero after the search.
 Anti Clutter (SEA)
Use the Anti-Clutter Sea control to reduce sea clutter to an
operational level where some residual clutter speckle is present.
The setting must permit small targets, often of similar signal
strength to the sea clutter returns to be detected.
Always use the control with great care. Avoid setting the control to
completely remove all sea clutter, as this will reduce the detection
of small targets. The setting should be periodically checked as
prevailing sea conditions change.
Each control is adjusted using the shaded bar behind its associated caption
which indicates the level in percentage terms with 0% on the left, 100% on
the right.
To manually adjust the Video GAIN, RAIN and SEA settings, do the
following:
The Gain and anti-clutter settings may be adjusted either from the control
panel, or by using the trackball.
IMPORTANT NOTE – There are different stored values of Gain
setting for Auto and Manual, you will need different settings for
each mode.
To adjust the Gain and anti-clutter settings using the trackball:
1. Position the screen cursor over the Gain
value and left click to make the control bar
active. The bar colour will appear blue.
Or:
1. With the Auto/Manual control set to Manual , position the screen
cursor over the anti-clutter control (Rain or Sea) you wish to
change and left click to make control bar active. The bar colour will
appear blue.
2. Move the trackball left or right to move
the bar to the gain/suppression level
required, as the bar is adjusted the
current percentage figure appears in the
centre of the field. You can exit the adjustment and return to the
previous setting by right clicking.