Lexicon 20/20 AD User Manual page 9

Controls and Connectors
Synchronization
Output Formatting
DITHER
Selects the type of dither:
wide bandwidth, 20 bit, or
High Frequency .
FORMAT
Selects the format to be
available at the output con-
nectors, AES or S/PDIF.
Note: The format selected
here will be sent to all out-
puts.
Alternate Modes
ALT - ATTEN
Mutes the outputs. Note that
the level meters still work. To
unmute, hold ALT and press
ATTEN again.
ALT - 4 CHAN
Activates output of a digital
sinewave at the AES ports.
4
and
DITHER WIDE
FORMAT
AES / WC: PRES
AES/WC
In internal sync mode, PRES
indicates that either WC or
AES is available at the inputs
as a sync source.
In external sync mode, PRES
indicates that the selected
sync source is present at the
input connectors.
To activate
the alternate modes...
press and hold
1dB SCALE
ALT MUTE
Repeat to exit the alternate mode.
ALT - DISPLAY
Activates remote mode/front
panel lockout. When acti-
vated, the 1dB SCALE and
DISPLAY LEDs flash and
front panel controls are
locked into their current set-
tings. To unlock, hold ALT
and press DISPLAY again.
20 BIT
HF PL DN
SAMPLE RATE
48 44.1
AES SPDIF
EXT SYNC
WC AES
LOCK
LOCK lights in external sync
mode to indicate the unit has
successfully locked to the in-
coming signal (WC or AES).
...then press one of these.
DISPLAY
ATTEN
RMT
4 CHAN LINK
~
ON
VID
ALT - LINK
Only active in 4-channel
mode. Activates a short tone
burst. See Realigning Two
DAT Recordings.
ALT - ON
Reserved for future en-
hancements.
SAMPLE RATE
Selects the sample rate of
the A/D conversion. This
switch should be set to the
same sample rate as your
sync source. When Word
Clock is selected as an exter-
nal sync source, the AES
Channel Status Sample Rate
bit will be set to the sample
rate value you have selected
here.
(The PL DN setting of this
switch is reserved for future
enhancements.)
EXT SYNC
This switch allows selection
of: Internal mode (unlit),
Word Clock source, or AES
source.
DITHER
ALT - DITHER
Activates psychoacousti-
cally optimized noise shap-
ing. When activated, WIDE,
20BIT and HF will be lighted.
Note that this type of dither
can only be used in 2-chan-
nel mode; activating will dis-
able 4-channel mode and
compressor functions.
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