Page 3-16
G1000/GFC 700 Post Installation Checkout Procedure - Hawker / Beechcraft King Air C90
Revision 5
190-00682-00
7. Repeat steps 5 and 6 for each of the following frequencies:
•
121.175 MHz
•
121.200 MHz
•
131.250 MHz
•
131.275 MHz
•
131.300 MHz
8. Repeat steps 3 through 7 while monitoring GPS2 signal levels on the MFD.
9. Repeat steps 3 through 8 for the No. 2 COM transceiver.
10. On the MFD, select AUX page 5.
11. Under the
COM CONFIG
field, change the COM channel spacing from 25 kHz to 8.33 kHz.
12. Re select AUX page 4 and monitor GPS1 signal strength bars.
13. Select 121.185 MHz on the No. 1 COM transceiver.
14. Transmit for a period of 35 seconds while monitoring GPS1 signal strength levels.
15. During the transmit period, verify that the GPS “
INTEG
” flag does not come into view on either
PFD and verify that GPS1 does not lose a 3-D navigation solution on the MFD.
16. Repeat steps 14 through 15 for each of the following frequencies:
•
121.190 MHz
•
130.285 MHz
•
131.290 MHz
17. Repeat steps 13 through 16 while monitoring GPS2 signal levels on the MFD.
18. Repeat steps 13 through 17 for the No. 2 COM transceiver.
19. On the MFD, select AUX page 5 and return the COM channel spacing to 25 kHz.
3.9
VOR/LOC/GS Test
Check the VOR, ILS, and Glideslope functions with ramp test equipment. Operate the equipment
according to the test equipment manufacturer’s instructions. Select the appropriate HSI source by using
the CDI softkey.
NOTE
The PFD HSI does not show a course deviation bar unless a valid VHF nav frequency is tuned.
Simulate a VOR signal on radial 360°. Verify full scale deflection of the CDI while applying a 10°
deviation signal. Exercise the CDI with both right and left deviations for both VOR 1 and VOR 2 receivers.
Repeat using a simulated localizer signal. Exercise the Glideslope deviation indicator with up and down
deviation indications and verify proper direction of deviation.
3.10
COM Antenna VSWR Checks
Check for insertion loss and VSWR (Voltage Standing Wave Ratio). VSWR should be checked with an
in-line type VSWR/wattmeter inserted in the coaxial transmission line between the transceiver and the
antenna. The VSWR should be inserted as close to the transceiver as possible. Any problem with the
antenna installation is most likely seen as high reflected power. A VSWR of 3:1 may result in up to a 50%
loss in transmit power. Ideally, the VSWR should be 2.5:1 or less.
