Honeywell MKXXII installation manual Category 14 Audio Output Level, Ohm

Honeywell

MK XXII EGPWS Installation Manual

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.

HJ1-70 L J1-71

HJ1-75 L J1-74

High level audio

			600 ohm
L			Audio
	o	w level audio
			Panel

8 ohm

FIGURE 3.16-1 Audio Interface

Note: Because most helicopters use a full muff headset, cockpit speakers are not applicable.

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