Lexicon Converter manual 20/20 AD Front Panel Controls

Controls and Connectors Lexicon

20/20 AD

Front Panel

Controls

The 20/20 AD front panel controls are divided into three functional groups for conversion, compression, and synchronization/output formatting.

																Synchronization and
	Converter								Compressor							Output Formatting
                                    
UNBAL THRESH OVL	UNBAL THRESH 1dB	SCALE	UNBAL THRESH		OVL		UNBAL THRESH	DISPLAY			DIGITAL COMP/LIMITER				100	DITHER	WIDE	20BIT		POWER
0	ALT				0			RMT		6							HF	PL DN SAMPLE RATE
3					3		4 CHAN					-18	-14		mS
									4		8
6					6		~										48	44.1		20/20 AD
12	PK	HOLD			12			LINK			-22		-10			FORMAT
18					18		EMPH		2		10		10			1S	AES	SPDIF
24					24						-26		-6						EXT SYNC	20 BIT A/D CONVERTER
30					30											– ∞	WC	AES
36	ATTEN			M	36	+		ON	0		12	-36	0	0 +
										M C							PRES	LOCK
42	MUTE			C	42	•		VID			P				•	AES / WC:
60	2		3	P	60	–	4			GAIN	THRESHOLD			RELEASE
1

The Converter

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

Lights when there is a mis- match between the input sig- nal and the setting of the rear-panel Balance switch.*

THRESH

When the compressor is on, indicates that the input level has risen above the selected compression threshold.

UNBAL THRESH

OVL

UNBAL

THRESH

1dB

SCALE

UNBAL

THRESH

OVL

UNBAL THRESH

0

0

3

ALT

3

~

4 CHAN

6

6

12

PK

HOLD

12

EMPH

18

18

24

24

30

ATTEN

30

36

M

36

+

42

C

42

•

1

2

MUTE

3

4

60

P

60

–

1dB SCALE

PK HOLD

ATTEN

Press to select 1dB Scale

Press to cause the level

Press to attenuate balanced

display on level meters.

meter LEDs to hold at the

input signals

by 6dB. Press

Also used to select alternate

highest level received. Press

again to turn attenuation off.

again to deactivate.

Do

not use

this control on

modes.

unbalanced signals.

4 CHAN

Push on-push off selection of 2-channel or 4-channel mode; lit when in 4-channel mode.

EMPH

Turns pre-emphasis on and off.

*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.

2