Audio International PA-7500A Installation Manual - page 10
Audio International, Inc. PA-7500A Installation
Document # 540056A, Rev. A, 7/2000
Page 9 of 11
3.9 Post-Installation
Test
3.9.1 With aircraft power ‘ON’, test the cabin audio amplifier. Any unit
providing audio that is connected to the RS-485 data bus may be
used to test proper operation the unit.
3.9.2 While an audio unit is sending audio signals through the amplifier,
key and speak into a microphone to ensure that the page / chime
overrides the entertainment audio. Ensure all microphones are
tested. Verify that the briefer audio can be heard through the
speakers.
3.9.3 Verify that the selected material may be heard through the
headphone and/or speaker system. Activate the PA key. Verify PA
overrides the headphone and/or speaker system.
3.9.4 Remove power from the amplifier and verify that the +28 VDC
emergency power is supplied to the amplifier. Verify that the
subwoofers are disabled while emergency power is applied.
Ensure that PA audio can be heard in the speaker system from all
respective microphones.
3.9.5 Audio level adjustments are accomplished via AI’s proprietary
RS-485 data bus. Contact Audio International, Inc. for setup
requirements.