Controls and Connectors | Lexicon |
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Synchronization and
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.
DITHER | WIDE | 20 BIT |
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| HF | PL DN | SAMPLE RATE |
| 48 | 44.1 | |
FORMAT |
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| AES | SPDIF | EXT SYNC |
| WC | AES | |
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AES / WC: | PRES | LOCK |
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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
Note: The format selected here will be sent to all out- puts.
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.
LOCK lights in external sync mode to indicate the unit has successfully locked to the in- coming signal (WC or AES).
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. This is for sync source only. See
Alternate Modes
To activate
the alternate modes...
press and hold | ...then press one of these. | ||||
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1dB SCALE | ATTEN |
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| DISPLAY | DITHER |
ALT | MUTE | RMT |
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| ~ 4 CHAN |
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| LINK | EXT SYNC |
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| ON |
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Repeat to exit the alternate mode. VID
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.
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.
ALT - LINK
Only active in
ALT - ON
Reserved for future en- hancements.
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
ALT - EXT SYNC
Enables the digital audio in- put. See Operating the 20/20 AD in the Digital Mode.
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