Roll Offset; Roll Gain; Pitch Offset; Pitch Gain - Honeywell Primus 880 Pilot's Manual

Roll Offset

Function - Roll offset permits exact compensation of the
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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.)
Entry Method - Using only one controller that is in the WX and
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variable gain modes, select RCT OFF. Push STB 4 times within
3 seconds. Verify that VAR and RCT are not displayed.
Control - The GAIN control is used to adjust the roll offset.
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Exit Method - Push STAB (once) to continue with the next
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adjustment.

Roll Gain

Function - Roll gain corrects the installation at bank angles over
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20° , for unsymmetrical radar displays.
Entry Method - Selected by sequencing through the roll offset
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and pitch offset menus with the STAB button. (Refer to Section
5, Radar Facts, table 5- 9.)
Control - Pull GAIN knob out and use it.
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Exit Method - Push STAB (once) to continue with the next
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adjustment.

Pitch Offset

Function - Adjusts the pitch attitude of the antenna to allow
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radar returns, in straight and level flight, to conform to the radar
range rings.
Entry Method - Selected by sequencing through the roll offset
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menu with the STAB button. (Refer to Section 5, Radar Facts,
table 5- 8.)
Control - Pull the GAIN knob out and use it.
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Exit Method - Push STAB (once) to continue with the next
D
adjustment.

Pitch Gain

Function - Adjusts the gain if the radar display is in pitch so that
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the contour lines track the range lines at higher pitch attitudes.
A28- 1146- 102- 00
PRIMUSr 880 Digital Weather Radar System
Operating Controls
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