JRC JMA-5912-6 Instruction Manual page 175

[3] AUTO Dynamic Range
• When the automatic sea clutter suppression mode and the automatic rain / snow clutter suppression
mode are in use, the dynamic range is automatically controlled.
• When the automatic sea clutter suppression mode is in use, this function improves gain by
widening the dynamic range of only areas where sea clutter is strong and narrowing the dynamic
range of areas where sea clutter is not detected.
• When the automatic rain / snow clutter suppression mode is in use, this function improves gain by
widening the dynamic range of areas where sea clutter and rain / snow clutter are strong and
narrowing the dynamic range of the other areas.
• Land videos become obscure when the automatic rain / snow clutter suppression mode is in use.
Off : Does not control the dynamic range automatically. (Standard setting)
The dynamic range is set in the same manner as when the manual sea clutter
suppression mode or the manual rain / snow clutter suppression mode is in use.
On : Automatically controls the dynamic range.
[4] Process Switch
• This function sets a specific area and switches the video process mode between the inside and
outside of the area.
• In [5] 2nd Process Mode, set the second video process mode for the area outside the boundary.
• In radar video processing (PROC) mode switching (④ lower left of the display on page 2-18), set
the first video process mode for the area inside the boundary.
• Gain at a distance can be improved by suppressing near sea clutter through the correlative process.
• There are two methods for setting an area.
Off
Range Fix
AUTO
[5] 2nd Process Mode
• Set the second video process mode for the outside of a specific area.
• This function is enabled when
Video process modes.
PROC Off
3Scan CORREL
4Scan CORREL
clutter
5Scan CORREL
Remain
Peak Hold
: Disables the Process Switching function. (Standard setting)
: Sets a boundary at a constant range from the center.
Set the boundary range in [6] Process Switch Range.
The specific area turns out to be a circle with the own ship's position as
the center.
: Automatically sets a specific area.
The area subject to many clutter returns is inside the boundary, and the
area less subject to clutter returns is outside the boundary.
Range Fix or AUTO is selected in [4] Process Switch.
: Select this mode in general.
: Select this mode when many rain / snow clutter returns are
detected.
: Select this mode to highlight targets while suppressing sea
returns.
: Select this mode to detect small targets hidden by sea clutter
returns.
: Select this mode when own ship yaws wildly.
: Select this mode to detect small targets of which detection
probability is low.
3-80
3.8 Applied Operations
3