GTN 625/635/650 TSO Installation Manual
Page 6-15
190-01004-02
Rev. C
6.6.11
VOR/LOC/GS Configuration Page (GTN 650 Only)
Access the VOR/LOC/GS Configuration page, as
shown in Figure 6-18, by touching the
‗VOR/LOC/GS‘ key from the GTN Setup page.
This page allows you to verify and calibrate the CDI
outputs from the VOR/LOC/GS receiver as well as
the OBS resolver input to the VOR receiver. It also
allows you to select the format for the DME tuning
data.
ENABLE/DISABLE NAV RADIO
To enable or disable the NAV radio, touch the key
to toggle between ‗Enabled‘ and ‗Disabled‘. The
NAV radio defaults to enabled state.
CALIBRATE OBS RESOLVER
To calibrate the OBS resolver, touch the ‗Calibrate‘ key on the VOR/LOC/GS Configuration page, as
shown in Figure 6-18. Next, select 150˚ on the OBS, then touch the OK key, as prompted on the display.
After the OBS resolver is finished calibrating, the GTN will display ‗OBS Resolver Calibration
Complete‘. Touch ‗OK‘ after the calibration is complete. Verify OBS operation by checking that the
course displayed on the GTN is within 2° of the selected course.
ARINC 429 CONFIGURATION SPEED (RX AND TX)
Selection
Description
Low
Standard low-speed ARINC 429 (nominally 12.5 kilobits per second)
High
High-speed ARINC 429 (nominally 100 kilobits per second)
SDI
Selection
Description
Common
TX: Generates all 429 outputs with SDI = 0.
VOR/ILS 1
Number 1 (Pilot) VOR/ILS Receiver
TX: Generates all 429 outputs with SDI = 1.
VOR/ILS 2
Number 2 (Copilot) VOR/ILS Receiver
TX: Generates all 429 outputs with SDI = 2.
DME MODE
Selection
Description
Directed freq 1
If the GTN is connected to a multi-channel ARINC 429 DME, channel 1 of that
DME is tuned. “Directed freq 1” should be selected if a single-channel ARINC
429 DME is to be tuned.
Directed freq 2
If the GTN is connected to a multi-channel ARINC 429 DME, channel 2 of that
DME is tuned.
DME CHANNEL MODE
This configuration setting allows you to set the format for DME tuning data output.
Selection
Description
King serial
King Serial DME tuning data
Parallel 2x5
2 of 5 parallel DME tuning.
Parallel BCD
Shifted BCD (Binary Coded Decimal) parallel DME tuning
Parallel slip
Slip-code parallel DME tuning
Narco 890/891
2 of 5 parallel DME tuning, compatible with the following DME units:
Narco DME 890
Narco DME 891
ARC (Cessna) RTA-476A
Figure 6-18. VOR/LOC/GS Configuration Page
