Garmin GTN 6 series Maintenance Manual page 36

3.4.4.5 GWX 70 Advanced Features (GTN 7XX Only)
The GTN 7XX can enable two Doppler radar features for the GWX 70. A Radar Turbulence Detection
Card (P/N 010-00878-45 or 010-00878-47 (dual install)) is needed for Turbulence Detection and a Radar
Automatic Ground Clutter Suppression Enablement Card (P/N 010-00878-44 or 010-00878-46 (dual
install)) is needed for Ground Clutter Suppression.
NOTE
For first time GWX 70 advanced feature enablement, refer to the GTN 6XX/7XX AML
STC IM, P/N 190-01007-A3, for additional installation requirements and checkout
procedures. This manual only describes the necessary steps to re-enable the feature for
existing installations.
To enable Radar Turbulence Detection:
1. Turn the GTN off by pulling the NAV/GPS circuit breaker.
2. Remove the database SD card from the SD card slot and insert the Radar Turbulence Detection
Enablement Card (P/N 010-00878-45), that was used at the initial installation.
3. Enter configuration mode on the GTN by applying power to the GTN (closing the circuit breaker)
while holding the HOME key.
4. Go to the Weather Radar page from the GTN Options page. Touch the Turbulence Detection key,
as shown in Figure 3-16.
5. When prompted, touch Yes to enable Turbulence Detection. When the feature is activated, the
Turbulence Detection key will be lit green.
To enable Ground Clutter Suppression:
1. Turn the GTN off by pulling the NAV/GPS circuit breaker.
2. Remove the database SD card from the SD card slot and insert the Radar AGCS Enablement Card
(P/N 010-00878-44) that was used at the initial installation.
3. Enter configuration mode on the GTN by applying power to the GTN (closing the circuit breaker)
while holding the HOME key.
4. Go to the Weather Radar page from the GTN Options page. Touch the Ground Clutter
Suppression key, as shown in Figure 3-16.
5. When prompted, touch Yes to enable Ground Clutter Suppression. When the feature is activated,
the Ground Clutter Suppression key will be lit green.
NOTE
The feature enablement card should be provided to the customer after service has been
completed.
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Page 3-16
190-01007-A1
Rev. 6