Media Technology Systems ION8.8 User Manual
Page 25
Page 25 of 31
Aug‐09
•
Test tone settings: The Test Tone is a simple Sine wave generator with controls
for level and frequency (see Figure 4-7 below)
Figure 4-7:
Test Tone Generator
•
Ducker:
The
Ducker
allows
the
user
to
bring
2
inputs
into
each
channel,
one
as
the
BGM
source
and
one
as
the
Paging
source.
When
the
paging
source
input
exceeds
a
set
threshold,
then
the
BGM
input
will
be
reduced
in
level
set
by
the
depth
control.
The
attach
and
release
times
set
the
speed
of
response
and
the
hold
time
will
hold
the
ducker
active
(ie
BGM
input
low)
for
a
set
time
after
the
paging
input
goes
low.
The
hold
time
stops
the
ducker
switching
in
and
out
during
gaps
in
speech.
See
Figure 4-8
below.
Figure 4-8: Ducker Controls
•
Mixer: The Even channels (Paging signal) are routed to both the Ducker (side
chain
control
and
to
the
Mixer.
The
mixer
recombines
the
BGM
and
Paging
signals
and
allows
the
user
to
set
the
relative
balance
between
input
1
(BGM)
and input 2 (Paging). The mixer is shown in Figure 4-9 below.
Figure 4-9:
Mixer Controls
•
EQ:
The
Equalizer
has
10
sections,
a
High
Pass
filter,
a
Low
Pass
filter
and
8
bands
of
Parametric
equalizer.
See
Figure 4-10
below.
Note
the
HPF
and
LPF
need
to
be
bypassed
if
they
are
not
to
be
used.