PRIMUSr 880 Digital Weather Radar System
ROLL GAIN ADJUSTMENT
This in- flight adjustment is made in a bank when the ground returns do not remain symmetrical during turns. The procedure is listed in table 5- 9.
Step | Procedure |
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1 | If two controllers are installed, one must be turned off. |
| If an indicator is used as the controller, 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 | On the WC controller, select variable gain (pull), WX, |
| and REACT OFF. VAR shows on the display |
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|
6 | Select STAB (STB) 4 times within 3 seconds. A |
| display with text instructions is shown. |
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7 | From the roll offset entry menu, push the STAB (STB) |
| button twice more to bring up the roll gain entry menu. |
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8 | To change the roll gain value, pull out the GAIN knob |
| and rotate it. The roll gain adjustment range is from 90 |
| to 110%. |
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9 | While flying with a steady roll angle of 10 to 20°, adjust |
| for symmetrical display of ground returns. |
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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 |
| (pitch gain). |
| Roll Gain Adjustment |
| Table 5- 9 |
A28- 1146- 102- 00 | Radar Facts |
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