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1.2 160X FRONT PANEL
dbx
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1B0X
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C
D
E
F
Q
H
I
Fif. 1·1 - Model 110X Fro,,t
Panel
A. BYPASS
SWITCH ANO INDICATOR
Depressing the BYPASS button creates a
"hard-wire
bypass" of the 160X's circuitry by
connecting the input directly to the output; the
LED above the switch turns ON in Bypass mode.
B. SLAVE
SWITCH ANO INDICATOR
Depressing the SLAVE button on one 160X
of a stereo pair determines that the
other
160X
will be the Master (the controlling unit). The LED
above the SLAVE button turns ON when the
160X is in SLAVE mode, indicating that the front
panel functions (with the exception of BYPASS
and DISPLAY select switches) are deactivated and
under control of the Master 160X. When neither
160X is in SLAVE mode, each will operate
normally
as a
mono compressor/limiter.
C. THRESHOLD
CONTROL
Adjusting this knob sets the threshold of
compression from -40 dBm (7
.8
mV) to 20 dBm
(7.8 V).
In hard-knee compression mode, the thres•
hold is defined as that point above which the out•
put level no longer changes on
a
1
:
1 basis with
changes in the input level. In Over Easy mode, the
threshold of compression is defined as the
approximate middle of the Over Easy threshold
region, as shown
in
Figure
3-1.
2
0. OVER EASY SWITCH
Depres.
s ing this button changes the threshold
mode to dbx's Over Easy
characteristic.
and allows
the
middle (an1ber)
T~~RESl-iOLO LED to turn ON
w:
1P.
1 1
thP.
signal
is in
the
Over Easy region. When
th
is
button is out
,
the
160X
oµerates as a hard-
k1
ice
c:on1pressor /I
imiter.
E. THRESHOLD
INDICATORS
These three LEDs indicate the relationship
of the
input
signal level to the threshold of com-
prc~s
ion. The green
"BE
LOW" LED
is
ON
when
the signal is below threshold and the red
"ABOVE"
l[ D is ON when the signal is above threshold.
When
the
160X is switched to Over Easy mode,
the
amber
LED is ON when the signal is in the
Over Easy region (Ref er to Figure 3-1 )
.
F. COMPRESSION RATIO
CONTROL
Rotating this control in a clockwise direction
increases the maximum amount of compression
from 1: 1 (no compression) up to infinity
:
1 (no
increase in
RMS
output regardless of input level
increases above threshold); further clockwise
rotation increases compression into the
INFINITY+ region, up to• maximum of-1:1
(i.e.,
1
1
dB
d«reast1
in input level causes a 1
dB
increase
in output level). In the INFINITY+ region,
the 160X inverts the program dynamics for
special effects.
G. OUTPUT
GAIN
CONTROL
Adjusting this control varies the amount of
fixed gain (up to ±20 dB) in the 160X's output
amplifier
stage.
The OUTPUT GAi N control does
not
interact with the threshold of compression.
H.
DISPLAY FUNCTION
SWITCH AND
INDICATORS
·
Depressing this button causes the upper
LEO
array
to
display
the INPUT level to the 160X.
With the button out, the OUTPUT signal level
is
displayed.
A
pair of LEDs immediately above the
OISPLA Y switch indicates the selected display
•
status.
I.
LEVEL
ANO GAIN
REDUCTION
DISPLAYS
The upper row of 19 LEDs displays either
the INPUT or OUTPUT level, as selected with the
DISPLAY switch. This display is factory set so that
0
dB
is equivalent to +4 dBm input or output levf:I
( 1.23
V
rms), but may
be
reset with the rear panel
METER CALIBRATION trimmer. (See Section 3.5
for recalibration instructions.)
The lower
row
of 12 LEDs displays up to
40 dB of GAIN REDUCTION being caused by the
160X. (Fixed gain changes commanded by
the
OUTPUT GAi N control are not displayed by the
gain change LEDs but are reflected in the output
level display.)
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