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22
Specific Applications
Anticipated compression
By feeding the program directly to the 160XT's
detector input and sending
the
audio signal
through a delay line before
the
audio
input
,
the
unit
can
"an
ticipate" the need for
a gain change.
See Figure 16. With some experimentation
the
ef-
fect can be that of
"ze
ro"
attack time at a given fre-
quency. Additional signal
delays
beyond
this
"zero"
time will then cause
the compressor to
fin-
ish reducing
the gain before the
leading
edge of the
loud
passage
even enters
the
signal
input. This
will
suppress the
program material preceding
this
loud
passage.
The 160XT will then
begin
to release
(re-
cover from compression) before
the loud passage
has dropped back down toward the
set
threshold.
This will cause
the
output
level to
surge
higher
as
the note or passage should be
decaying. The
pro-
duced effect sounds
like reverse
playback of a
tape
recording. When coupled
with Infinity+
compres-
sion,
highly unusual
effects can be achieved.
Installation Considerations
Power Considerations
Connect
Power
A. Check the
line
voltage.
The
160XT is shipped for
115
or 230V, 50 or
60Hz
operation. Refer to the unit's rear panel to verify
your unit's precise line voltage.
SOURCE
I!
IN
DETECTOR
,
I
DEIAY
IN
AUDIO
OUT
'
160
XT
Figure 16: Anticipated Compression
dbx
160XT
B. Connect the
160XT's
power cord to an appropriate AC power source.
Mounting the 160XT in a Rack (OPTIONAL)
Mount
the 160XT
in
a
lU
rack
space
(1.75
inches,
4.45
cm).
Mounting
the unit
directly over large heat-producing devices
(such
as a vacuum-tube power amplifier)
may
shor
ten
componen
t
life and is not recommended. Ambient temperatures
sho
uld
not exceed 113°F
(45°C)
when equipment
is
powered.
23
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