Specifications

Audio International, Inc. A/V-9691-01(-02)-x Installation & Operation Manual
Document # 540250, Rev D, 07/2004
Page 24 of 33
3.8.11 A/V-9691-01(-02)-x Order of Audio Adjustments
The order of audio adjustments for the A/V-9691-01(-02)-x module
is critical to the audio performance of the system (both cabin audio
and headphone audio). The overall objective should be to
maximum system gain while minimizing noise introduction. That is
to say, the main goal in audio adjustment of the A/V-9691-01(-02)-x
system is to maximize signal-to-noise ratios.
Below, a suggested order of audio adjustments is provided to aid in
achieving maximum signal-to-noise ratios for the system. Keep in
mind, however, that these are suggestions only and that final
adjustments may vary depending upon user preferences.
Entertainment Audio
• Step 1-Adjust all entertainment source equipment audio output gain levels to
a medium setting if possible.
• Step 2-Adjust all entertainment audio inputs using the trim control settings.
Based upon audio input level specifications, the initial trim settings for each
entertainment audio input should be set between approximately 80% to 90%
of maximum.
• Step 3-Specify all power-up settings for all audio output channels for volume,
bass, and treble levels.
• Step 4-Set all digital EQ frequency band settings to 0dB (flat response).
• Step 5-Set forward and aft amplifier input levels to an initial setting of 50% if
using split-cabin mode. Set
forward amplifier input level to an initial setting of
50% if using bi-level mode.
• Step 6-Set forward and aft amplifier output levels to an initial setting of 50% if
using split-cabin mode. Set high
and low amplifier output levels to an initial
setting of 50% if using bi-level mode.
• Step 7-Set forward and aft amplifier weight-on-wheels output levels to an
initial setting of 0% if using split-cabin mode. Set high and low amplifier
weight-on-wheels output levels to an initial setting of 0% if using bi-level
mode.
• Step 8-Final adjustment of entertainment audio levels and digital EQ
frequency band settings should be per user preference.
PA Audio
• Step 1-Adjust all microphone audio and audio briefer input levels to an initial
setting of 80%.
• Step 2-Adjust all pilot and copilot sidetone and chime audio output levels to
an initial setting of 50%.
• Step 3-Adjust chime audio output level, composite PA/chime audio output
levels, and composite speaker audio output levels to initial settings of 50%.
• Step 4-Adjust amplifier PA audio input level to an initial setting of 50%.
• Step 5-Final adjustment of PA audio levels should be per user preference.