PRIMUSr 880 Digital Weather Radar System
PITCH OFFSET ADJUSTMENT
This in- flight adjustment in made in straight and level flight when the ground returns do not follow the contours of the radar display range arcs. The procedure is listed in table 5- 8.
Step | Procedure |
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1 | If two controllers are installed, one must be turned off. |
| If an indicator is used, the procedure is the same as |
| given below. |
2 | Fly to an altitude of 10,000 feet AGL or greater. |
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3 | Set range to 25 NM. |
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4 | Adjust the tilt down until a solid band of ground returns |
| are shown on the screen. Then adjust the tilt until the |
| green region of the ground returns start at about 20 |
| NM. |
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5 | Select RCT OFF. |
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6 | Select STAB (STB) 4 times within 3 seconds. The roll |
| offset display is shown. |
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7 | From the roll offset entry menu, push the STAB (STB) |
| button once more to bring up the pitch offset entry |
| menu. |
8 | To change the pitch offset value, pull out the GAIN |
| knob and rotate it. The offset range is from - 2.0°to |
| +2.0° . |
9 | When flying straight and level, adjust so the contour of |
| the ground returns follow the contour of the range arcs |
| as closely as possible. |
10 | When change is completed, push in the GAIN knob. |
| The display returns to the previous message. |
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|
11 | Push the STAB (STB) button to go to the next menu |
| (roll gain). |
| Pitch Offset Adjustment Procedure |
| Table 5- 8 |
Radar Facts | A28- 1146- 102- 00 |
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