Specifications

Audio International, Inc. A/V-9691-01(-02)-x Installation & Operation Manual

Document # 540250, Rev D, 07/2004

Page 7 of 33

Audio Briefer Input: One (1) audio briefer input is provided to

allow for broadcast of briefing messages from either the cockpit or

an external device. The PTT input is ground active (<1.2 VDC to

activate). Configurable audible tone activation for the audio briefer

PTT activation allows either an ON tone and/or an OFF tone when

the PTT input is activated and/or deactivated.

Pilot and Copilot Chime Audio Outputs – Cockpit Chime: Each

initiation of the cockpit chime input will cause a single high tone

activation over the Pilot and Copilot chime outputs. When the input

is removed, the unit generates a single high tone. This input is

ground active (<1.2 VDC to activate). Additionally, the cockpit

chime feature does not activate a PA/chime key output when

activated. The cockpit chime feature is only audible over the Pilot

and Copilot chime audio outputs.

Pilot and Copilot Sidetone Audio Outputs: One (1) Pilot sidetone

and one (1) Copilot sidetone audio output is provided to allow for

separate Pilot or Copilot microphone audio output to either the Pilot

or Copilot positions respectively.

PA/Chime Audio Output: Two (2) composite PA/Chime audio

outputs are provided at 600 Ω output impedance each to allow each

output to interface to additional aircraft systems. All microphone,

briefer, and chime audio signals are present at these two (2)

outputs except the cockpit chime tone activation.

Speaker Audio Output: Two (2) composite PA/Chime audio

outputs are provided at an 8 Ω output impedance each with each

output having a power rating of approximately 12 W to allow for

interface to speaker connections such as galley and/or lavatory

speaker locations. The output power rating level is not adjustable,

but an input level adjustment is provided to the internal amplifier for

this output for user adjustment. All microphone, briefer, and chime

audio signals are present at these two (2) outputs except the

cockpit chime tone activation.

Two-Tone Chime Inputs: Three (3) two-tone chime inputs are

provided for use. Each initiation will cause a high tone activation

followed by a low tone activation. When the activation input is

removed, a single high tone is generated. The two-tone chime

feature activates both PA/chime key outputs when activated. All

three (3) two-tone chime inputs are +28 VDC active.