4: Element Operations • 79
©2008 Axia Audio — Rev. 3.0
A Reset function is provided to remotely turn the
channel Off while suppressing the Stop command, use-
ful for allowing certain types of tape machines to re-cue.
You’ll also find a Ready command which will remotely
illuminate the Off lamp on the Element channel and ac-
tivate the GPIO Off lamp driver, allowing source equip-
ment to signal the operator with either a steady-state Off
button (indicating source ready) or a flashing Off button
(indicating source next). Refer to the GPIO Node User’s
Manual for information on interfacing to the GPIO’s in-
puts and outputs.
The block diagram for this channel selection is
shown in Figure 4-36.
Phone Channel Operation
The Phone Channel profile is used, naturally, for tele-
phone hybrid audio sources. Each Phone Channel has its
own discrete Feed-to-Source mix-minus output.
Each Element can accomodate as many unique, au-
tomatically-generated mix-minus feeds as it has faders.
If the Feed-to-Source mode is set to “Auto” (the most
common option - see Chapter Two, “Configuring In-
puts,” for the section entitled “Source Profile Options”),
phone callers hear the output of the Program-1 bus, mi-
nus himself, when the the channels they’re assigned to
are On. When the caller’s channel is Off, their channel’s
Talkback key is lit and they hear the Board Operator’s
mic routed to their Talkback feed.
When a Phone Channel has been assigned to an
Element fader, the Status Symbol display located above
the channel name will display an icon to show the board
operator what is being fed to the caller.
Phone feed-to-source outputs can also be locked to
backfeed only PGM-1, PGM-2, PGM-3 or PGM-4, us-
ing the options provided when constructing the Source
Profile for your hybrid. This automatic switching mode
makes it very easy to prep callers and then seamlessly
put them on the air with a minimum of button pushes.
(See Chapter Two).
Channels configured for Phone sources can be turned
on and off remotely, and will provide on/off status to a
remote logic device. Remote Preview is also provided,
as are lamp drivers for On, Off and Preview. Start and
Stop pulses can be sent when the channel is turned on or
off, respectively. See the GPIO User’s Manual for infor-
mation interfacing to GPIO inputs and outpus.
The block diagram for this channel selection is
shown in Figure 4-37.
Codec Channel Operation
The Codec Channel is used for codec sources. Like
the Phone Channel, each codec source is brought up on
its own channel, and an individual Feed-to-Source (mix
minus) output is provided for each codec. Codec Chan-
nels can be turned on and off remotely and provide on/
off status to a remote logic device. Remote Talk and
Remote Mute are also provided, allowing talent to take
control using their own On/Off/Mute/Talk panels.
Talk enables remote talent to communicate with the
board op using the Talkback bus. When Talk is acti-
vated, all outputs for that channel are muted and the
source audio is fed to the Talkback bus; the channel’s
Talkback key lights, and its Status Symbol displays
T. When the user stops talking, the channel returns to
normal, and its Talkback key flashes for three seconds,
alerting the board operator to the guest who spoke to
him, and enabling him to reply using the Talkback key.
When the remote mute function is activated, the Sta-
tus Symbol displays M, and all the channel outputs are
muted until the command is released.
The mix-minus output normally feeds Program-1
audio to the remote, but can be switched to Program-
2. The Feed-to-Source output on a Codec Channel is
a dual mono output, occupying both sides of the stereo
pair. The Left output is normally used for remote talent’s
headphone feed, and is interrupted by Talkback audio
when the board op talks to the remote. The Right output
sends uninterrupted program audio for use as a PA feed.
The block diagram for this channel selection is
shown in Figure 4-38.
To Next Page
Loading...
