Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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5.3.9 Category 9, Navigation Input Select
The following table provides identification of the Navigation type. The entry in the Navigation Type corresponds to a
table that provides detailed information on the configuration. For example, the details for Navigation Type #1 are found
in Table 5.3.9-1. In this category, only the following signals are defined:
• Glideslope source selection.
• Localizer source selection.
• PFD Mode Select Word
• Selected Course
Note: Numerous (but not all) Envelope Modulation cases require a localizer input. Therefore, a NAV ID
that supplies both Glideslope and Localizer should be selected in this category, if possible.
However, due to hardware limitations, use of Localizer for installations that can only provide low
level GS validity is not supported. In these cases, only ID #1 can be selected. Envelope
Modulation will still function for those locations which do not require a Localizer input, but not
for those that require Localizer.

TABLE 5.3.9: NAVIGATION INPUT SELECT

ID Navigation
Inputs Select Description Software
Effectivity
EGPWS
Effectivity
(Table 5.3.9-x) MKVI MK VIII
00
Analog Glideslope (ARINC 547) with +28V Validity
Flag -020 X X
11
Analog Glideslope (ARINC 547) with Low Level
Validity -020 X X
2 2 Digital Glideslope (ARINC 429) -020 X X
3 3 Digital Glideslope and Localizer (ARINC 429) -020 X X
4 4 Digital KN40 Glideslope and Localizer (ARINC 429) -020 X X
55
Analog Glideslope/Localizer (ARINC 547) with
+28V Validity Flag -020 X X
250 250 Digital Glideslope, Localizer, PFD Word and Selected
Course (ARINC 429 via dual IOC buses) (Note 1) -020 N/A X
251 251 Digital Glideslope, Localizer and Selected Course
(ARINC 429 via dual IOC buses) (Note 2) -020 N/A X
252 252 Digital Glideslope and Localizer – Alternate Input
Channels (ARINC 429 via dual IOC buses) (Note 2) -020 N/A X
253 253 Digital Glideslope and Localizer (ARINC 429 via
dual IOC buses) (Note 2) -020 N/A X
254 254 Digital Glideslope, Localizer and PFD Word (ARINC
429 via dual IOC buses) (Note 1) -020 N/A X
255 255 Digital Glideslope and Localizer – Alternate Labels
(ARINC 429 via dual IOC buses) (Note 2) -020 N/A X
Note 1: ID 250 and 254 may only be used in conjunction with other IOC bus selections for categories 2,6,8,10,11 and 12.
The use of either the left or right source is based on the displayed source provided on label 163.
Note 2: ID 251, 252, 253, and 255 may only be used in conjunction with other IOC bus selections for categories
2,6,8,10,11 and 12.