1 7
8 4 4
S
E R I E S I I
I
NTRODUCTION
The DOD 844 Series II Quad Noise Gate consists of 4 independent noise gates
in a single rack space unit. Threshold, release time, and attenuation (0 dB to
90 dB) for each gate are user controllable. Special features include a Key
input for gating, or "keying", from a signal other than the input. A control out-
put is also provided for triggering other devices with a 5 volt pulse from the
selected channel when the input for that channel rises above the threshold.
Monitoring the operation of the 844 is made simple with front panel LEDs that
indicate the operating status of each channel (lit when input signal is being
gated).
I
NSTALLATION
Install the 844 in a rack with the provided rack screws. Route the AC cord
away from audio lines to a convenient outlet. Connections to the input and
output jacks are made using balanced tip-ring-sleeve or unbalanced 1/4" tip-
sleeve phone plugs.
FOR BALANCED CONNECTION: wire the plug as follows:
Tip: high.
Ring: low.
Sleeve: ground.
FOR UNBALANCED CONNECTION: wire the plug as follows:
Tip: high.
Sleeve: low
Connection to the Key input is made using a 1/4" mono phone plug wired for
unbalanced connection as indicated above.
Connection to the control output is made using a 1/4" mono phone plug wired
for unbalanced connection as in previous. This is NOT an audio output.
-25
+10
-60
THRESHOLD
1
5
0.02
RELEASE
45
90
0
ATTENUATION
dB
sec
dBu
INT.
IN
EXT.
OUT
CHANNEL
ONE
-25
+10
-60
THRESHOLD
1
5
0.02
REL
45
90
0
ATTENUATION
dB
sec
dBu
CHANNEL TWO
-25
+10
-60
THRESHOLD
1
5
0.02
RELEASE
45
90
0
ATTENUATION
dB
sec
dBu
CHANNEL THREE
-25
+10
-60
THRESHOLD
1
5
0.02
RELEASE
45
90
0
ATTENUATION
dB
sec
dBu
CHANNEL FOUR
KEY
GATE
KEY
GATE
KEY
GATE
KEY
GATE
INT.
IN
EXT.
OUT
INT.
IN
EXT.
OUT
INT.
IN
EXT.
OUT
844
series
II
quad noise gate
Signal Processors 18-0121-B 6/8/99 10:25 AM Page 17
