Rev.7a (for units from ser.no. 51053/built 2010) 26.01.2010 This document substitutes previous versions page 25 of 34
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AIRCOM Manual
7.4.2.
Intercom and Commentator Audio Link including fail-safe operation
We presume, that you are well acquainted with the previously described „Simple Intercom Link“.
In this example we describe an application with 2 commentators but no guest commentator.
Concept
All settings and functionalities of the „Simple Intercom Link“ apply. But in addition, you use the
intercom-system audio capacity fort he commentator’s ON AIR signals as well.
Thus you use the infrastructure of the intercom-system and do not need to install separate audio lines.
However, you may use the standard AIRCOM audio I/Os on a fail-safe system with redundant audio
transmission. It takes over, if the intercom-system breaks down. E.g. connect sum output A+GUEST+B
and PROGRAM input (maybe also COM3) to a failsafe-system.
Note:
Your commentators mainly use the clear AIRCOM operational interface and AIRCOM’s high quality
audio front-end. At the same time you achieve a maximum utilisation of technical resources in the field
… and there is an option for a failsafe-system.
But consider:
In this setup, your ON AIR signals rely mostly on the intercom-system. Make sure, that
its audio capabilities meet your demands. In case of doubt … rather draw your ON AIR audio signals
straight from the AIRCOM.
AIRCOM Configuration refer to 7.4.1
Interconnections between AIRCOM and intercom-system like 7.4.1 but additionally
ON AIR A
control signal from AIRCOM to intercom-system
ON AIR B
control signal from AIRCOM to intercom-system
LINK
„always active“ control signal from intercom-system. It should release in case there is a
functional problem or a system breakdown.
functional description refer to 7.4.1 but additionally:
-
Inside the intercom-system commentator signals are handled depending on control signal states of
ON AIR A and ON AIR B. As a result they can be accurately routed inside the intercom-system and
extracted at an adequate (studio) location.
-
The intercom-system delivers intercom as well as program audio signals (same as 7.4.1 last passage
„alternatively“)
-
As we presume, that LINK will release in case the intercom-system breaks down, the AIRCOM
PROGRAM monitor will automatically switch over to the XLR PROGRAM input.
-
Optionally use SC CUT A/B (external disable of SIDECHAIN monitoring) in this setup. More
information see chapter 7.3.
