Front Panel Controls - Lexicon 20 - REV 1 User Manual

Controls and Connectors
20/20 AD
Front Panel
Controls
UNBAL THRESH UNBAL THRESH
OVL
0
3
6
12
18
24
30
36
42
60
1 2
The Converter
UNBAL THRESH
OVL
0
3
6
12
18
24
30
36
42
60
1
1dB SCALE
Press to select 1dB Scale
display on level meters.
Also used to select alternate
modes.
2
The 20/20 AD front panel controls are divided into three functional groups for
conversion, compression, and synchronization/output formatting.
Converter
UNBAL THRESH UNBAL THRESH
OVL
1dB SCALE
0
ALT
3
6
12
PK HOLD
18
24
30
ATTEN M 36 +
42
C •
MUTE
60
P –
3 4
Gain Controls: 1, 2, 3 and 4
Provide continuously vari-
able gain control over a 30dB
range.
Note: In 2-channel mode,
only 1 and 2 are active.
UNBAL THRESH UNBAL
1dB SCALE
ALT
PK HOLD
ATTEN
MUTE
2
PK HOLD
Press to cause the level
meter LEDs to hold at the
highest level received. Press
again to deactivate.
* Non-linearity of the potentiometer can cause the signal to become unbalanced when the level knob is
set to 11:30. To correct this, turn the knob slightly in either direction until the UNBAL light goes out.
Compressor
DIGITAL COMP/LIMITER
DISPLAY
RMT
6
-18 -14
4 CHAN
4
~ 8
-22
LINK
EMPH
2 10
-26
12
ON 0
-36 0
M P
C
VID
GAIN THRESHOLD
UNBAL
Lights when there is a mis-
match between the input sig-
nal and the setting of the
rear-panel Balance switch.*
THRESH UNBAL THRESH
OVL
0
3
6
12
18
24
30
36
M +
42
C •
60
3 4
P –
ATTEN
Press to attenuate balanced
input signals by 6dB. Press
again to turn attenuation off.
Do not use this control on
unbalanced signals.
Synchronization and
Output Formatting
DITHER WIDE 20BIT
100
mS HF PL DN
SAMPLE RATE
48 44.1
-10
FORMAT
10 1S
AES SPDIF
EXT SYNC
-6
WC AES
0
+ • –
AES / WC: PRES LOCK
RELEASE
THRESH
When the compressor is on,
indicates that the input level
has risen above the selected
compression threshold.
4 CHAN
Push on-push off selection of
2-channel or 4-channel
4 CHAN
~ mode; lit when in 4-channel
EMPH
mode.
EMPH
Turns pre-emphasis on and
off.
Lexicon
POWER
20/20 AD
20 BIT A/D CONVERTER