Lexicon Converter manual Specifications, Cmrr

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Specifications

Digital Audio

Inputs and Outputs

AES, S/PDIF: XLR, 3-wire balanced RCA, 2-wire unbalanced coaxial line Optical, optical fiber

Word Clock: BNC, 75, unbalanced

Front Panel Controls Converter Gain (4) 1dB SCALE/ALT

PK HOLD ATTEN/MUTE

4CHAN/~

EMPH DISPLAY/RMT LINK/ tone burst

ON/VID Compressor Gain Compressor Threshold Compressor Release DITHER (3 types, and OFF)

FORMAT SAMPLE RATE (2)

EXT SYNC (2 types, and none)

POWER

Rear Panel Controls

BAL/UNBAL switch

Front Panel Indicators

UNBAL

THRESH Input level Dither selection Format selection Sample Rate selection External source selection,

presence and lock Button lights indicate:

1dB SCALE on PK HOLD on ATTEN on

Frequency Response (relative to 1kHz)

+0.1, -0.15dB, 10Hz to -20 kHz

MAX Input Level

Balanced:

Attenuator Off: +0 to +22 dBu

Attenuator On: +8 to +28 dBu Unbalanced:

Attenuator Off: -6 to +16 dBu (-8 to +14 dBV)

Dynamic Range

4-channel mode: 100dB typ, 98dB min @ 1kHz

2-channel mode: 112dB typ, 110dB min @ 1kHz

THD+N (at -2dBfs) 1kHz: <-94dB (0.002%)

20 Hz-20 kHz: <-90dB (0.0032%)

CMRR

Attenuator Off:

>60dB below 1kHz, >40dB above 1kHz

Attenuator On: >40dB

Crosstalk

-80dB typ, 0-20kHz

Sample Rates

44.1 kHz, 48 kHz

Sync Sources

Internal

External AES (Digital Input*) External Word Clock

(TTL level square wave)

Video (with optional daughter- board)

Signal Delay 112 samples

(2.54 ms at 44.1kHz

2.33 ms at 48kHz)

RFI Shielding

Complies with FCC Rules Part 15 Class A requirements for computer equipment

Power Requirements

100/120/220/240 VAC (+5%, -10%)

50-60 Hz 30W

Dimensions

19.0"W x 1.75"H x 13.9"D (483 x 45 x 353mm)

Conforms to 19" rack mount standard, 1U high

Weight

11 lbs 2 oz (5 kg)

Shipping materials meet or exceed Proj- ect 1A of the National Safe Transit Asso- ciation (NSTA) packaged-product specifications: vibration test, drop test, static compression test.

Environment

Operating Temperature: 32° to 95° F (0° to 35° C)

Storage Temperature: -22°to 167° F (-30°to 75° C)

Humidity: 95% maximum without condensation

Safety Approvals

UL, TUV

4-CHAN on EMPH on DISPLAY on LINK on COMP/LIMITER on

Lock Range

+5%*Units with Serial #'s <1215 do not have this option installed. Upgrades are avail- able from Lexicon.

Specifications subject to change without notice.

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Contents 20/20 AD Precautions Safety Summary Electrostatic Discharge ESD PrecautionsContents Introduction AES/EBU Interface ProfessionalControls and Connectors Power Mounting20/20 AD Front Panel Controls ConverterDisplay Level MetersCompressor LinkTo activate Alternate modes Synchronization Output FormattingAlternate Modes Press and hold Then press one of these20/20 AD Rear Panel Connectors BAL/UNBALConnectors Audio ConnectionsXLR Pinout Cables AES/EBUPdif Signal Type Attenuator DBu DBV Signal Type Pin Pin3Termination and Grounding via Internal Jumpers These instructions are for use by qualified personnel only Word ClockAnalog Jumpers Balanced Unbalanced Input Signals Atten Front panel AdjustmentsPK Hold ChanSynchronization and Sample Rate AES Sync Word ClockStates Internal and External modesAbout Dither Psychoacoustically Optimized Noise Shaping Pons00k 10.0k 12.0k 14.0k 16.0k 18.0k Automatic Offset Removal Compressor Modes Dynamic Range CompressionInput Compressor Knob Values Gain Threshold ReleaseNon-linear Transfer FunctionsUsing the 20/20 AD Lexicon Link Realigning Two DAT Recordings Digital Sinewave GeneratorGain Operating the 20/20 AD in the Digital Mode Specifications CmrrDefinition of Terms