Grass Valley M-2100 - Manual (Page 68)

2-44 MMCP Installation/Operation Manual
Section 2 — System Operations
Audio Breakaway Operations
If the Audio Only button in the Breakaway section has been selected (high tally),
pressing any of the PST buttons on the Program/Preset bus causes an
Audio Breakaway to occur, switching just the audio matrix crosspoint to
that indicated by the newly selected button. This Audio Breakaway cross-
point displays low tally. Audio Only tally in the Breakaway section is
dropped. If there was a Breakaway or/and an Over previously selected, it
is dropped.
You may also press an Audio Control subpanel PST button to perform an
Audio Breakaway with the Audio Only button selected. The PST button in the
Audio Control subpanel shows low tally to indicate the Audio Breakaway.
The four Audio Only sources are an extension of the 16 primary inputs,
allowing an Audio Breakaway to be one of 20 sources.
There can be both a Breakaway and an Over. The Breakaway and Over
source can both be crosspoints in the Audio Control subpanel. It is possible
for an Audio Only to be selected as an Over on one bus (Program for
example) and as a Breakaway on the other (Preset for example). There can
be no more than one Over at a time on a bus.
Selecting a married or breakaway source drops an Over if present. Thus,
Overs must be selected last.
Audio Only PGM Buttons
Audio Only PGM buttons select the Program source in the manner
described previously for the PST buttons. The source(s) selected on the
Program bus are immediately transitioned to air, (Over or Breakaway) as a
hot cut. If an Over is selected, it is transitioned as discussed in the Audio
Ratio Profile section (see Audio Ratio Profiles
on page 2-50 ).
Audio Breakaway Audio (ABA) Control
The system is in the Audio Breakaway Audio (ABA) mode when control is
delegated to one Audio Processor, AP 2–4. The following operations are
enabled for the selected Audio Processor:
To Change or Select an Over
Select the desired PST or PGM button in the Audio Control subpanel. Any
previously selected Over is dropped. Re-selecting the same Over drops it
(toggle off). Since a primary audio source selection drops an Over, Over
selection must be done last.
To Change or Select an Audio Source as an Audio Breakaway
If the desired crosspoint is on the Program/Preset bus, selection can be
made regardless of the state of the
Audio Only button in the Breakaway sub-
panel. An Over, if present, is dropped.