GTR 225/GNC 255 TSO Installation Manual
190-01182-02
Page 6-8
Rev. B
6.4.2.2 ARINC 429 (GNC Only)
The ARINC 429 page (Figure 6-11) allows the installer to configure the NAV ARINC 429 output on the
GNC. Configure the port according to the connected VOR/ILS indicator. See Table 6-7 and Table 6-8 for
description of the configuration speeds.
Figure 6-11. ARINC 429 Page
Table 6-7. ARINC 429 Configuration Speed (TX)
Table 6-8. SDI Selections
6.4.2.3 DME Configuration (GNC Only)
Select the DME configuration page to configure the DME channel mode settings.
6.4.2.3.1 Mode (DME Channel Mode)
This configuration setting allows the installer to set the format for DME tuning data output. See Table 6-9
for DME settings.
Table 6-9. DME Settings
Selection
Description
LO SPEED
Standard low-speed ARINC 429 (nominally 12.5 kilobits per second)
HI SPEED
High-speed ARINC 429 (nominally 100 kilobits per second)
Selection
Description
COMMON
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
SERIAL
For use with serial Electronic Flight Instruments (EFIS) conforming to the
Garmin Serial Data Specification. See Appendix B
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 Narco DME units:
DME 890
DME 891
Summary of Contents for GNC 255
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