Lexicon 20/20 AD manual Synchronization Output Formatting, Alternate Modes

Controls and Connectors Lexicon

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
	HF	PL DN	SAMPLE RATE
	48	44.1
FORMAT
	AES	SPDIF	EXT SYNC
	WC	AES
AES / WC:	PRES	LOCK

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.

Alternate Modes

To activate

the alternate modes...

press and hold	...then press one of these.
    	          
1dB SCALE	ATTEN		DISPLAY DITHER
ALT	MUTE	RMT
	~ 4 CHAN		LINK
			ON

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 4-channel mode. Activates a short tone burst. See Realigning Two DAT Recordings.

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 2-chan- nel mode; activating will dis- able 4-channel mode and compressor functions.

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