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MK XXII EGPWS Installation Manual
CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225 REV: C
SHEET
104
3.3.14 Category 14 – Audio Output Level
Category 14 controls the Audio Output level for alert menu callouts (cautions and warnings).
Refer to Category 13 for information on the Mode 6 Low Volume discrete.
Appendix E Table E 3.1.14
defines the Audio Output Level options and identifies the first MK
VI/VIII EGPWS version in which the option was available (see the Effectivity entry).
3.3.14.1 Instructions
1. Using
Appendix E Tables E 3 and E 3.1.14
as described above, select the Audio Output
Level ID number that matches the feature preferences and version (part number) being
installed.
2. Record the ID number for the Audio Output Level from
Appendix E Table E 3.1.14
under the
Ident No. heading for Step (Category) 14 in
Appendix E Table E 3.
The Nominal Volume Select is equivalent to MK XXII MAX volume level. The –6dB through –24
dB are successively lower volume from Nominal. The Nominal output is 4 watts rms into an 8-
ohm load and 100 milli-watts rms into a 600-ohm load. The audio output level for Mode 6 alerts
can be reduced an additional 6 dB by activating the Mode 6 Low Volume discrete of Category 13.
High level audio
600 ohm
Audio
Panel
Low level audio
J1-70
H
J1-71
L
J1-75H
J1-74L
8 ohm
FIGURE 3.16-1 Audio Interface
Note: Because most helicopters use a full muff headset, cockpit speakers are not applicable.