MDC-7000/7900 Series Chapter 2 Radar Basic Operation
0093169010-10
2.33 Reference position and Display center
Reference position
The base point for range, bearing, relative course, relative speed, CPA or TCPA, EBL or VRM is named
[Reference position], respectively.
Either CCRP (consistent common reference point) or ANT (antenna position) can be used as the
reference position.
Selection of the reference position is made in CCRP or ANT of [REF] located of the upper left of the
display, with trackball and ENT key.
Display center
The display center positon can be changed to CCRP (consistent common reference point) or ANT
(antenna position) when reference position is CCRP.
1 Press MENU key to display “Menu”
Select [DISPLAY] => [DISPLAY CENTER] => select [ANT] or [CCRP], and press ENT key.
The display center of echo image (PPI) is always ANT position.
When CCRP is selected for the reference position, there is possibility that CCRP is located outside of
90% echo image area in short distance range.
In this case, the reference position is automatically changed to ANT position.
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