JRC JMA-3300 Series, Instruction Manual, Page: 163 / 298

Chapter 2 OPERATIONS
2.14 FUNCTION KEY SETTINGS
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AUTO STC/FTC (Automatic clutter suppression)
y Detects unwanted waves such as rain/snow clutter and sea clutter and automatically
suppresses them.
y When the sea state or weather changes, this function automatically performs
suppression processing in accordance with the situation.
y Suppression processing is not full automatic, and requires the operator to control the
afterimages of unwanted waves.
y To control the afterimage of sea clutter, use the
[SEA]
control.
y To control the afterimage of rain/snow clutter, use the
[RAIN]
control.
y
In areas where the density of unwanted waves is low, unwanted waves may remain
being judged as targets. Thus, use the automatic clutter suppression mode together
with the video process mode.
y Characteristics of the automatic clutter suppression function:
Off: Disables the automatic clutter suppression function.
Select "Off" when rain/snow clutter and sea clutter are not strong
or when the ship is in a bay.
AUTO STC: Automatically detects the strength of sea clutter, and performs the
most suitable sea clutter suppression processing.
Even when the strength of sea clutter varies depending on the wind
direction, AUTO STC performs the most suitable suppression
processing.
Land like islands can be displayed naturally.
Since rain clouds outside sea clutter areas are recognized as land,
there is no effect of suppressing rain/snow clutter.
Use the
[RAIN] control to set the rain/snow clutter suppression
function.
AUTO FTC: Along with AUTO STC, this function automatically detects the
strength of rain/snow clutter, and performs the most suitable
rain/snow clutter suppression processing.
Since land is recognized as rain clouds, land videos become
obscure.
z
Pulse Length
y
Sets the standard transmitter pulse length in each range.
y
When the range is called, the pulse length is used.