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S SEL -- Selects the language or music
Vol. 1 05--25--5
REV 56, Jan 31/03
COMMUNICATIONS
Announcement and Boarding Music System
Flight Crew Operating Manual
CSP A--013
MASTER
Boarding Music and Announcement System <0035>
Figure 05---25---3
Key
Used to scroll upward through
the displayed menu or to
increase the volume.
Language/Volume (L/V) Key
Pressed once to enter the language selection
menu. To enter the volume adjustment mode,
press twice, if initiated from the announcement
or music selection mode; press once if
initiated from the language selection mode.
STOP Key
When pressed,
stops the
broadcast of music
or announcement.
Display Unit
A 16--character LCD which displays the
selection and announcement menus or
built--in test messages or error codes.
PLAY Key
When pressed, begins
broadcast of music or an
announcement.
Digital Boarding Music Unit
Entrance/ Flight Attendant Station
Announcement (A) Key
Used to enter the selection
and broadcast menu of
music or announcements.
LED (green)
Linked to the ON key, which indicates the
status of the system (lit when system is on).
ON Key
When pressed, turns
the system on.
Pressing again will
turn the system off.
LED (green)
Linked to the PLAY key, which
indicates (lit) that a broadcast is
in progress.
Selection (SEL) Key
Used to select or cancel
the desired language or
music.
Key
Used to scroll downward through the
displayed menu or to decrease the volume.
REV 56, Jan 31/03
Vol. 1 05--25--6
COMMUNICATIONS
Announcement and Boarding Music System
Flight Crew Operating Manual MASTER
CSP A--013
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Boarding
Music System Tape Player PASS ADDR. DC BAT 1 Q5
Vol. 1 05--30--1
REV 56, Jan 31/03
COMMUNICATIONS
Radio Communication System
Flight Crew Operating Manual
CSP A--013
MASTER
1. RADIO COMMUNICATION SYSTEM
Two VHF radio communication systems provide AM voice communication with ground
stations and other aircraft. The radios work with the audio integrating system to provide full
two way communication. The audio control panels provide selection and control of the audio
outputs. The radio communication system is energized when electrical power is applied to
the aircraft.
Two VHF radio communication systems provide AM voice communication with ground
stations and other aircraft. A third VHF system provides a backup to VHF 1 and VHF 2. The
radios work with the audio integrating system to provide full two way communication. The
audio control panels provide selection and control of the audio outputs. The radio
communication system is energized when electrical power is applied to the aircraft.
<0008> <0014>
Two VHF radio communication systems provide AM voice communication with ground
stations and other aircraft. A third VHF system is used as a data link only. The radios work
with the audio integrating system to provide full two way communication. The audio control
panels provide selection and control of the audio outputs. The radio communication system
is energized when electrical power is applied to the aircraft. <0081><0084>
Transceiver tuning range is 118.000 to 136.975 MHz. Frequency tuning and mode selection
is done by two primary radio tuning units (RTU). Frequency tuning can also be done by a
backup standby tuning unit or the FMS control display unit.
A. Radio Tuning Unit
The radio tuning units and radio systems have an on-side relationship. RTU 1 monitors
and controls COM 1 and RTU 2 monitors and controls COM 2. In the event of total AC
power loss or failure of both radio tuning units, the backup tuning unit provides
reversionary control of COM 1.
Radio information is presented on two levels of the radio tuning units. The top level
page displays the overall status of all radios and allows the operator to make frequency
changes. A COM main page provides the means to change frequencies, codes and
operating modes.
The active VHF COM frequency is shown on the top left hand side of the radio tuning
unit top level page, while the preset frequency is displayed on the top right hand side.
Pressing the line select key adjacent to any frequency brings the tuning window to that
frequency. It is then possible to modify that frequency with the frequency select knobs.
Pressing the line select key adjacent to the preset frequency twice, swaps the active
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