Instruction manual
ACU-1000 Operations Manual
Interoperability Now 4-9
4.8 Poor Audio Quality
Clear communication is vital during an emergency. This section describes ways to optimize
the clarity of spoken messages so that Interoperability System users are heard, heard correctly,
and heard the first time, and not asked to repeat themselves. The ACU-1000 has a variety of
options to improve audio quality.
4.8.1 Incompatible Audio Levels
When a conversation is taking place, especially a conference call between three or more people,
clear communication is enhanced when all parties are heard at the same volume.
The ACU Controller’s module settings screens provide a quick and simple means to set proper
audio levels for each extension. It is preferable to adjust all extensions during initial setup
rather than to try to modify individual interfaces later. This is because an interoperability
cross-connection involves a variety of audio levels and it may be difficult to determine which
level is at fault when not following a systematic process.
DSP
Module
Radio A
Radio B
Radio A
B
DSP
Module
A
R
X
A
u
d
io
&
C
O
R
TX Audio & PTT
RX Audio: What is being spoken into Radio A
COR: This signal is active while the talking is going on
TX Audio: This same audio being sent back out
PTT: This signal is active when COR is active
Radio B
Figure 4-5 Audio Levels Involved With Each Cross-Connection