4.0 APPLICATIONS
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Some common applications of limiters are:
Obtaining more loudness
Obtaining more "punch"
Preventing transmitter overmodulation
Preventing tape overload
Preventing system peak overload
Preventing overcutting
Preventing satellite uplink overmodulation
Audio P.A. system protection
Special Effects
Conventional limiters are more
suited to certain of
these
uses
than
to others.
The
Studio Dominator,
because
of its
intelligent circuitry
and optional
configurations, is
equally
well
suited
to all
limiter
uses.
This
manual
will address
several
general
categories
of
limiter
application
and show
typical setups which can serve as the basis for your
particular
operation.
4.1 Broadcasting
FM
broadcast
processing
requires
special
consideration
because
of
the pre-emphasis
curve and
bandwidth restrictions
involved.
An option card (and a few other simple modifications)
can be
installed in
the Studio
Dominator to
produce accurate
operation for FM transmission.
With this option, two
operating
conditions may be chosen.
First, pre-emphasis can be
selected
which
causes
the
studio
Dominator
to
output
a
properly
pre-emphasized
signal
ready
for
direct
feed
into
a
non
pre-emphasized stereo generator.
This is the preferred approach
in
most
cases.
Second,
accurate de-emphasis
may be
selected
after limiting
to restore
flat system
response for
feed to a
pre-emphasized stereo generator.
NOTE:
If the
stereo generator used
does not include
the
necessary
left
and right
channel 15kHz
overshoot compensated
lowpass
filters,
then
the
lowpass
filter
option
should be
specified
in
the
Studio
Dominator.
Many
stereo generators
include lowpass filters. but they are not overshoot compensated,
which results in loss
of modulation capability.
In
this case,
the
filter
should
be
bypassed
or
removed
and
the
studio
Dominator filter used.
Setting
up
the
limiter
for
FM
operation
is basically
similar to the
general set-up procedure.
A program signal
is
fed into the studio Dominator
and drive is adjusted to
produce
at
least
BdB of
limitng.
Release
time
should be
full fast
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