Gwx 68 Or Gwx 70 Weather Radar - Garmin G1000 System Maintenance Manual

7.12

GWX 68 or GWX 70 Weather Radar

Original GWX 68 or GWX 70 Reinstalled
No software or configuration loading is required if the removed GWX 68 or GWX 70 is re-installed. This
does not include units that were returned for repair as their software and configuration files are deleted
during the repair testing process. Continue to the GWX 68 or GWX 70 Test (Section 7.12.1).
New, Repaired or Exchange GWX 68 or GWX 70 Installed
If a new, repaired or exchange GWX 68 or GWX 70 is installed, the correct software and configuration
files must be loaded to the unit. See Section 3.9 and then continue to the GWX 68 or GWX 70 Test
(Section 7.12.1).
7.12.1 GWX 68 or GWX 70 Test
Operation of the GWX 68 or GWX 70 Weather Radar is accomplished using the MFD/GCU 477. Refer
to G1000 300/B300 King Air Cockpit Reference Guide, listed in Table 1-2, for basic operation.
Before energizing the equipment, be sure microwave radiation safety precautions
including both fuel and personnel safety considerations have been observed. These
include clearing all personnel to an area beyond the maximum permissible exposure level
(MPEL) boundary. The MPEL for the GWX 68 is 11 feet and the GWX 70 is 10 feet.
1. On the GCU, turn the large FMS knob to select the Map Page Group then turn the small FMS knob
to select the Weather Radar page.
2. Select the MODE softkey.
3. Select the STANDBY softkey to initiate the one minute warm-up period. Verify the radar enters the
standby mode after the warm-up is complete.
4. Select the MODE softkey.
5. Select the WEATHER softkey. After reading the CAUTION statement, turn the large FMS knob to
select YES. Press the GCU ENT key.
6. Select the STAB ON softkey to activate antenna stabilization or select the STAB OFF softkey to
deactivate. Verify the current stabilization condition is shown in the upper right of the weather radar
display.
7. Select the BACK softkey.
8. Select the VERTICAL softkey.
9. Select the TILT softkey to activate the cursor in the TILT field.
10. On the GCU, turn the small FMS knob to select the desired antenna tilt angle. Press the GCU ENT
key. Press the GCU FMS knob to remove the cursor.
11. Select the GAIN softkey to activate the cursor in the GAIN field.
12. On the GCU, turn the small FMS knob to adjust the gain for the desirable level. Verify the gain
setting is visible in the gain field as a movable horizontal bar in a flashing box and the line pointer is
a reference depicting the calibrated position. Press the FMS knob to remove the cursor.
13. On the GCU, select the GAIN softkey again to recalibrate the gain. Verify 'CALIBRATED' is
displayed in the GAIN field.
14. Select the MODE softkey.
15. Select the OFF softkey.
Page 7-30
Revision 4
NOTE
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01