Instruction manual

Installation Instructions
61
Symptom Possible Explanation
Dynamic labels don’t work on
a C-Bus DLT wall switch.
There are several options which need
to be selected for labels to function.
These options are located:
• on the More panel accessed by
clicking the “More....” button on
the Amplifier’s C-Bus Control tab in
Toolkit
• on the DLT wall switch’s Global tab
in Toolkit
• on the Zones branch of the Project
tree in the MARPA software.
An Amplifier switches off,
particularly when the volume
is loud.
If insufficient current is available for the
Amplifier, it will switch itself off. This
may occur if the Amplifier receives its
power from a Matrix Switcher. The
Amplifier may need its own external
power supply unit.
An Amplifier emits a high
pitched screeching sound
when a particular source is
selected.
This may occur if an output of an
Amplifier is connected to the input of
the Matrix Switcher. Such a connection
should be avoided as it can cause a
feedback loop.
The Matrix Switcher does not
power up.
The fuse may need replacing. Fuse
replacement is described in the Matrix
Switcher User’s Guide.
Audio is not broadcast via the
Matrix Switcher’s high priority
(HI) broadcast input.
The level of the audio connected to the
broadcast input may not be sufficient
to trigger the broadcast.
Cannot hear any sound when
using the optical input
The digital audio source may be
connected to the optical output instead
of the input (on a Matrix Switcher).
Some digital audio formats (such as
surround sound) are incompatible with
the MRA system.