Revision C • 10/07
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3-11
3 Operation
signed, then the source is selected in bus order;
PGM 2, PGM 3, PGM 4, then Offline.
While the Channel is Off: The Offline bus is the
foldback mix bus. If it’s not assigned (unlit), then
there is no foldback audio—except for talkback.
Auto-Foldback On is the most common setting
for call-in contests or interviews where the caller
also goes live on-air. Typically, only the talent mic
channel and the caller’s Telco channel are assigned
to Offline. While the Telco channel is Off, the caller
can hear the talent thru their mic feeding the
Offline bus. The talent can hear the caller by lis-
tening to Telco monitor or by putting the Telco
channel into cue. In this setup, the talent mic is
live all the time it is assigned to Offline.
If, while the caller is waiting to go on-air, they
must listen to something like a “contest rules and
regulations” recording, then it is best to only as-
sign the recording playback channel and the caller
to Offline. The talent can then press the caller’s
Talkback button to talk to the caller, or can mo-
mentarily assign their mic to Offline to talk to the
caller without pressing Talkback.
When the caller then goes live on-air (the Telco
channel is On), the foldback automatically switches
to PGM 1 (assuming the air feed is the Program 1
bus) so that the caller hears everything else going
out on-air, but of course, minus their own voice.
Auto-Foldback Off
When Auto-Foldback is off (the AUTO F/B but-
ton is unlit), the Telco channel has a different bus
priority order for selecting which is the foldback
feed.
While the Channel is On or Off, the primary
foldback source is Offline. If it is not assigned, then
the program buses are selected in order: PGM 1,
PGM 2, PGM 3, PGM 4.
Auto-Foldback Off is the most common setting
for recording callers for later broadcast or for do-
ing a live remote
where a “broad-
cast” feed to the
remote site is re-
quired.
In a remote
broadcast, when
the remote talent
goes between be-
ing off-air and
on-air, the
foldback mix
shouldn’t change.
In this case select
only PGM 1 on
the Telco channel
and the PGM 1
foldback will al-
ways be sent to the remote, regardless of whether
the channel is On or Off. If a special remote broad-
cast mix is required, construct it using the Offline
bus and it will be the foldback feed, regardless of
the program bus assignments and whether the
channel is On or Off.
TELCO RECORD OUTPUT
A two-channel Telco Record output, assigned
during console configuration, sends a “caller” on
the left output along with the “talent” on the right
output to an editor like a VoxPro®.
The “caller” output are those Telco channels that
are assigned as To Record Telcos by the session
file. The “talent” output is a base mix of one pro-
gram bus or the Offline bus (the source for the
base mix is set using a bus priority order, just like
how the foldback mix source is selected). Typi-
cally, just the talent mic channel is assigned to the
bus for the base mix, but any channels assigned
to that bus will be recorded.
The base mix bus is the highest priority bus
assigned on any To Record Telco—even if more
Foldback
Source
when
AUTO F/B
is not lit
Channel
status does
not change
the foldback
source.
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