Lexicon Converter Manual Do Utilizador
27
20/20 AD User Guide
Digital Audio
Inputs and Outputs
Inputs and Outputs
AES, S/PDIF: XLR, 3-wire balanced
RCA, 2-wire
unbalanced coaxial line
Optical, optical fiber
unbalanced coaxial line
Optical, optical fiber
Word Clock:
BNC, 75
Ω
, unbalanced
Front Panel Controls
Converter Gain (4)
1dB SCALE/ALT
PK HOLD
ATTEN/MUTE
4 CHAN/~
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
Converter Gain (4)
1dB SCALE/ALT
PK HOLD
ATTEN/MUTE
4 CHAN/~
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
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
4-CHAN on
EMPH on
DISPLAY on
LINK on
COMP/LIMITER on
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
4-CHAN on
EMPH on
DISPLAY on
LINK on
COMP/LIMITER on
Signal Delay
112 samples
(2.54 ms at 44.1kHz
2.33 ms at 48kHz)
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
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
100/120/220/240 VAC (+5%, -10%)
50-60 Hz 30W
Dimensions
19.0"W x 1.75"H x 13.9"D
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)
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.
ect 1A of the National Safe Transit Asso-
ciation (NSTA) packaged-product
specifications: vibration test, drop test,
static compression test.
Environment
Operating Temperature: 32
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
condensation
Safety Approvals
UL, TUV
UL, TUV
Frequency Response
(relative to 1kHz)
+0.1, -0.15dB, 10Hz to -20 kHz
(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
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:
4-channel mode:
100dB typ,
98dB min @ 1kHz
98dB min @ 1kHz
2-channel mode:
112dB typ,
110dB min @ 1kHz
110dB min @ 1kHz
THD+N (at -2dBfs)
1kHz: <-94dB (0.002%)
20 Hz-20 kHz: <-90dB (0.0032%)
1kHz: <-94dB (0.002%)
20 Hz-20 kHz: <-90dB (0.0032%)
CMRR
Attenuator Off:
Attenuator Off:
>60dB below 1kHz,
>40dB above 1kHz
>40dB above 1kHz
Attenuator On: >40dB
Crosstalk
-80dB typ, 0-20kHz
-80dB typ, 0-20kHz
Sample Rates
44.1 kHz, 48 kHz
44.1 kHz, 48 kHz
Sync Sources
Internal
External AES (Digital Input*)
External Word Clock
(TTL level square wave)
Video (with optional daughter-
board)
Internal
External AES (Digital Input*)
External Word Clock
(TTL level square wave)
Video (with optional daughter-
board)
Lock Range
+5%
+5%
Specifications subject to change without notice.
Specifications
*Units with Serial #'s <1215 do not have
this option installed. Upgrades are avail-
able from Lexicon.
this option installed. Upgrades are avail-
able from Lexicon.