Manual-
OPERATORS MANUAL
QUICK START
Shredded, this document makes excellent packing material.
In its present form, it makes interesting and useful reading. If
you run out of patience quickly, at least read this part to make
sure you don’t exterminate everything within a two mile radius
by doing something wrong.
First, be sure the
POWER
switch is off. Attach one or two
channels of Inputs and Outputs to the respective connectors on
the rear.
This device uses low impedance balanced line drivers.
Do
not
connect the XLR “+” or “–” output pins to ground, as this may
cause the power supply to shut down. For unbalanced use, leave the
unused output pin (“+” or “–”) unterminated.
OK, now you can
power up your sound system, volumes down, amp turned on
last
.
With the
GATE THRESHOLD
turned all the way
down
to
-80 dBu
,
COMPRESSOR THRESHOLD
turned all the way
up
to
20 dBu,
COMPRESSOR RATIO
turned all the way
down
to
1
,
and the
OUTPUT LEVEL
control in the
center
at
0
dB,
you have an expensive patch cord.
While sending a signal to the DC 22, adjust the output
level of the previous device so the
+4 dBu
LED lights occasion-
ally, but the
OL
LED does not light. If you are driving the ¼"
WEAR PARTS:
This product contains no wear parts.
DC 22
STEREO COMPRESSOR
INPUTS with a balanced signal (tip-ring-sleeve), set the Input
Gain switch to +4 dBu (
in
). When driving this input with an
unbalanced signal (tip-sleeve), set this switch to –10 dBv (
out
).
Regardless of the type of Input, you might need to set this switch
so the
INPUT LEVEL
LEDs light correctly.
Now increase the
COMPRESSOR RATIO
to something
useful, like
2:1
(with the control set at 2, the Ratio is 2:1; at 5, it
is 5:1.) Adjust the
COMPRESSOR THRESHOLD
to the point
you want the Compressor to kick in. The
GAIN REDUCTION
meter reads the amount of signal compression.
If you want the quiet parts to be even quieter, increase the
GATE THRESHOLD
so only higher levels make it through the
Gate.
Both Gates and Compressors will activate by the source
material applied to either channel if the
LINK
switch is on. This
is the preferred setting for stereo program material. The chan-
nel 1 controls set both channels to the same adjustments, as the
channel 2 controls go dormant and the LEDs extinguish. If
the
LINK
switch is off, then both channels are independently
controllable.
SLAVE
THRESHOLD
OL
+4 dBu
MASTER
REDUCTION
GAIN
THRESHOLD
RATIO
BYPASS
LEVEL
GATE
INPUT
COMPRESSOR
LINK
OUTPUT
LEVEL
6
24
12
3
1
THRESHOLD
OL
+4 dBu
REDUCTION
GAIN
THRESHOLD
RATIO
BYPASS
LEVEL
GATE
INPUT
COMPRESSOR
OUTPUT
LEVEL
POWER
6
24
12
3
2
DC 22
dBu
dBu
:1
dB
-20
-60
-80
-70
-50
-40
-30
0
10
20
-40
-30
-10
-20
3
1.7
∞
∞
1
1.2
10
2
6
-6
12
15
-15
-12
0
dBu
dBu
:1
dB
-20
-60
-80
-70
-50
-40
-30
0
10
20
-40
-30
-10
-20
3
1.7
1
1.2
10
2
6
-6
12
15
-15
-12
0
DYNAMIC
CONTROLLER
