PRIMUS
r
880 Digital Weather Radar System
A28- 1146- 102- 00
Operating Controls
3-27
Roll Offset
D
Function
- Roll offset permits exact compensation of the
antenna roll to eliminate the effects of small errors in the aircraft
radar installation. Constantly lopsided ground returns can be
eliminated. (Refer to Section 5, Radar Facts, table 5- 5.)
D
Entry Method
- Using only one controller that is in the WX and
variable gain modes, select RCT OFF. Push STB 4 times within
3 seconds. Verify that VAR and RCT are not displayed.
D
Control
- The GAIN control is used to adjust the roll offset.
D
Exit Method
- Push STAB (once) to continue with the next
adjustment.
Roll Gain
D
Function
- Roll gain corrects the installation at bank angles over
20
°
, for unsymmetrical radar displays.
D
Entry Method
- Selected by sequencing through the roll offset
and pitch offset menus with the STAB button. (Refer to Section
5, Radar Facts, table 5- 9.)
D
Control
- Pull GAIN knob out and use it.
D
Exit Method
- Push STAB (once) to continue with the next
adjustment.
Pitch Offset
D
Function
- Adjusts the pitch attitude of the antenna to allow
radar returns, in straight and level flight, to conform to the radar
range rings.
D
Entry Method
- Selected by sequencing through the roll offset
menu with the STAB button. (Refer to Section 5, Radar Facts,
table 5- 8.)
D
Control
- Pull the GAIN knob out and use it.
D
Exit Method
- Push STAB (once) to continue with the next
adjustment.
Pitch Gain
D
Function
- Adjusts the gain if the radar display is in pitch so that
the contour lines track the range lines at higher pitch attitudes.
Summary of Contents for Primus 880
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