Lexicon 20/20 AD manual - page 8

3
Controls and Connectors
20/20 AD User Guide
The Level Meters
When the compressor is off , the behavior of the level meters is determined by the settings
of the 1dB SCALE, and PK HOLD switches.
When the compressor is
on , pressing DISPLAY will cause gain reduction (in dB) to be
displayed on the two right hand meters (2-channel mode) or on all four meters (4-channel
mode).
The following charts show all of the possible states of the level meter and the value in
decibels for each state.
The Compressor
DISPLAY
Press to cause gain reduc-
tion to be displayed on the
level meters — In 2-channel
mode, only the right two level
meters are activated; in 4-
channel mode, all four level
meters display compression.
Press again to deactivate.
GAIN
Adjusts the gain of low level
signals (below the compres-
sion threshold) between the
converter and the compres-
sor.
THRESHOLD
Sets the level at which com-
pression starts.
none
1 dB SCALE
DISPLAY
Normal
1 dB Scale
Gain Reduction
Normal
1 dB Scale
Gain Reduction
none
1 dB SCALE
DISPLAY
Normal
Normal
Normal
(Blank)
1 dB Scale
Gain Reduction
Switches ON Meters 1 & 2 Meters 3 & 4
4-Channel
Mode
2-Channel
Mode
1dB SCALE
GAIN
REDUCTION
NORMAL
OVL
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
1
2
3
4
5
6
7
8
9
10
11
OVL
0
-3
-6
-12
-18
-24
-30
-36
-42
-60
- red -
- red -
- yellow -
- yellow -
- green -
- green -
- green -
- green -
- green -
- green -
- green -
OVL
0
3
6
12
18
24
30
36
42
60
DISPLAY
RMT
LINK
ON
6
GAIN
8
10
12
4
2
0
-14
-10
0-36
-18
-22
-26
100
mS
THRESHOLD RELEASE
DIGITAL COMP/LIMITER
-6
CPM
•–+
0
10
VID
∞
1S
LINK
In 2-channel mode, links the
left and right compressors ; in
4-channel mode, where 1,2
and 3,4 are already linked,
this control links the two
pairs.
ON
Turns the compressor on
and off.
RELEASE
This control allows adjust-
ment of the release time of
the compressor. Release
times from 0mS to ∞ are
available. The attack time of
the compressor is automati-
cally set as a function of the
signal rise time.