Auditronics ALM-12d, Техническое руководство, Страница: 64 / 101

page 9 – 8
ALM-12d / Oct 2001
O P E R A T I O N
signal strength, but we also need to control the audio that the caller hears (also
known as caller feed). Since the signal input to the section is always the caller,
there is no need to display that information. Instead, the DISPLAY in the
phone section shows the caller feed.
Also, the callers may need to hear one feed when the combined caller audio
is assigned to a bus and the phone section is ON (on air) and a different feed
when the combined caller audio is not assigned to a bus or the phone section
is OFF (off air).
To prevent possible feedback and annoying echo, the caller feed never
contains the caller’s own voice. Each caller feed will, however, contain the
voice of the other caller (if there is one).
So, operation of the phone section is different than operation of a normal
fader, and you need to read the instructions carefully to make the most of the
caller features.
Select Button - Selecting What the Caller Hears
As noted above, the audio selected by the phone section is the audio the
callers will hear, and that audio may be different depending on whether the
caller is off air or on air.
On Air Caller Feed Selection
Make sure that the phone section is ON (ON BUTTON is lit). Press the
SELECT BUTTON. The button lights, the CHANNEL DISPLAY in the
monitor section shows “CALL ON”, and the SOURCE DISPLAY shows the
current on air caller feed. The ENTER BUTTON begins to flash. Turn the
SELECT KNOB until the desired on air caller feed shows in the SOURCE
DISPLAY, then press the ENTER BUTTON (the ENTER BUTTON stops
flashing) to select the source. The source name shows in the phone section
DISPLAY, and the SELECT BUTTON light goes off. Each caller will hear
the displayed source, along with the other caller’s voice, when the phone is on
air. In each caller’s feed, the caller’s own voice is absent.
The on air caller feed source can be any signal appearing at a console input
connector (except the caller inputs and the producer talkback input), any of the
four main buses, or either of the general purpose mix-minus buses. As
mentioned previously, the caller feed will never contain the caller’s own
voice.
Auto Selection of On Air Caller Feed
If this feature has been enabled by the installer, operation of the phone
section is different than described above. First, the phone can only be assigned
to one of the four main buses at a time. Selecting a new bus will turn off the
previous bus assign. Second, when the phone section is on and a bus assign
switch is pressed, the on air caller feed is automatically reselected to be the
assigned bus output, minus the caller’s own voice. If the current bus is
deselected, the caller feed goes back to what was selected for it by the selection
process.