Lexicon 20/20 AD User Manual page 8

20/20 AD User Guide
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.
Switches ON
none
4-Channel
1 dB SCALE
Mode
DISPLAY
none
2-Channel
1 dB SCALE
Mode
DISPLAY
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.
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.
Meters 1 & 2 Meters 3 & 4
Normal Normal
1 dB Scale 1 dB Scale
Gain Reduction Gain Reduction
Normal (Blank)
Normal 1 dB Scale
Normal Gain Reduction
DISPLAY
RMT 6
4
LINK
2
0
ON
M
C
VID
GAIN
GAIN
Adjusts the gain of low level
signals (below the compres-
sion threshold) between the
converter and the compres-
sor.
OVL
0
3
6
12
18
24
30
36
42
60
DIGITAL COMP/LIMITER
100
mS
-18 -14
8
-22 -10
10 10
-26 -6
12 0
-36 0 + • –
P
THRESHOLD RELEASE
THRESHOLD
Sets the level at which com-
pression starts.
Controls and Connectors
The Level Meters
NORMAL 1dB SCALE
- red - OVL OVL
- red - 0 0
- yellow - -3 -1
- yellow - -6 -2
- green - -12 -3
- green - -18 -4
- green - -24 -5
- green - -30 -6
- green - -36 -7
- green - -42 -8
- green - -60 -9
The Compressor
1S
RELEASE
This control allows adjust-
ment of the release time of
the compressor. Release
times from 0mS to
available. The attack time of
the compressor is automati-
cally set as a function of the
signal rise time.
GAIN
REDUCTION
1
2
3
4
5
6
7
8
9
10
11
are
3