Garmin 500 Series Installation Manual page 89

5.3.4 Deviation & Flags Check
The analog deviation (LEFT/RIGHT and UP/DOWN), TO/FROM, and FLAG (lateral and vertical) outputs
to a CDI or HSI should be verified in flight with potential sources of electrical noise such as autopilot,
flaps, gear, heater blowers, etc. operating. Lateral deviation and flags may be checked with either GPS or
VOR/ILS, and vertical deviation and flags must be checked with Glideslope. Verify that the flags are
hidden at the correct times, and that the flag is in view at the correct times.
5.3.5 Crossfill Check (Only if dual units installed with RS-232 crossfill connected)
Turn on both 400/500 Series units in the aircraft. For each 400 Series unit:
1. Select the first AUX page (titled "FLIGHT PLANNING").
2. Select "CROSSFILL".
3. Verify that the displayed status is "Ready". If "Not Available" is displayed, there may be an RS-
232 wiring problem between the two 400/500 Series units.
5.3.6 VHF COM Interference Check (GNC 520 and GNS 530 Only)
Once the Signal Acquisition Test has been completed successfully, perform the following steps:
4. View the Satellite Status Page and verify that 7 to 8 satellites have been acquired.
5. Verify that the GPS "NAV" flag is out of view.
6. Select 121.150 MHz on the 500 Series COM transceiver.
7. Transmit for a period of 20 seconds.
8. Verify that the GPS "NAV" flag does not come into view.
9. Repeat steps 4 and 5 for the following frequencies:
•
121.175 MHz
•
121.200 MHz
•
131.250 MHz
•
131.275 MHz
•
131.300 MHz
10. Repeat steps 3 through 6 for all COM transceivers installed in the aircraft.
11. If the GPS "NAV" flag comes into view, refer to Section 2.2.7 for options to improve
performance.
5.3.7 VHF COM Check (GNC 520 and GNS 530 Only)
A flight test is recommended after the installation is complete to ensure satisfactory performance. To check
the communications transceiver, maintain an appropriate altitude and contact a ground station facility at a
range of at least 50 nautical miles. Contact a close ground station. Press the squelch disable button to
defeat the automatic squelch feature and listen for any unusual electrical noise which would increase the
squelch threshold. If possible, verify the communications capability on both the high and low ends of the
VHF COM band.
5.3.8 VOR/ILS Check (GNS 530 Only)
Select a VOR channel within a 40 nautical mile range. Listen to the VOR audio and verify that no electrical
interference such as magneto noise is present. Check the tone identifier filter operation. Fly inbound or
outbound on a selected VOR radial and check for proper LEFT/RIGHT, TO/FROM, and FLAG indications.
Check the VOR accuracy. Verify that the flag is hidden with a valid received station, and that the flag is in
view when there is not a received station.
5.3.9 DME Tuning Check (GNS 530 Only)
Select a VOR/ILS channel that corresponds to (1) a DME station within a 40 nautical mile range, or (2) the
frequency of a DME ground tester. Verify that the DME locks on to the signal and a valid distance,
groundspeed and time are displayed.
Page 5-16
Page Rev. B
500 SERIES INSTALLATION MANUAL
P/N 190-00181-02