20 21MIDAS DL231 Quick Start Guide
7. Technical Speci cations
This section contains the technical speci cations for the DL231 I/O unit.
Due to our policy of continual improvement, MIDAS reserves the right to alter the
function or speci cation at any time without notice.
General Statistics
General Speci cations
Audio Performance Speci cations
Frequency response
Input Output Gain 20 Hz 20 kHz
DL231 I/O Box DL231 I/O Box 0 dB +0 dB to -1 dB +0 dB to -1 dB
DL231 I/O Box DL231 I/O Box 45 dB +0 dB to -1 dB +0 dB to -1 dB
Gain error at 1 kHz
Input Output Gain Max. Min.
DL231 I/O Box DL231 I/O Box 0 dB +1 dB -1 dB
DL231 I/O Box DL231 I/O Box 45 dB +1 dB -1 dB
Input CMRR Typical
Input Output Gain 100 Hz 1 kHz
DL231 I/O Box DL231 I/O Box 0 dB 70 dB 70 dB
DL231 I/O Box DL231 I/O Box 45 dB 90 dB 90 dB
Distortion at 0 dBu
Input Output Gain 1 kHz 10 kHz
DL231 I/O Box DL231 I/O Box 0 dB 0.01% 0.01%
DL231 I/O Box DL231 I/O Box 45 dB 0.03% 0.03%
Distortion at +20 dBu
Input Output Gain 1 kHz 10 kHz
DL231 I/O Box DL231 I/O Box 0 dB 0.01% 0.01%
DL231 I/O Box DL231 I/O Box 45 dB 0.03% 0.03%
XLR Connections
DL231
1 x 5U rack I/O box houses: 24 x (XLR) mic/line inputs (48 mic/line amps)
24 x (XLR) line outputs
Resilience
Dual redundant network cables and dual redundant PSUs
Sampling frequency 48 kHz/96 kHz
Dynamic range @ 1 kHz22 Hz to 22 kHz (at unity gain): > 107 dB
Maximum gain 45 dB
Crosstalk @ 1 kHZ-90 dB physically adjacent input channels
Crosstalk @ 10k HZ-90 dB physically adjacent input channels
Dimensions 5U x 410 mm deep
Net wei
ght 15 kg
Shipping weight 18 kg
Power requirements 100 V to 240 V AC ±10%, 50 to 60 Hz
Power consumption <150 W
Operating temperature range +5° C to +40° C
Storage temperature range -20° C to +60° C
Signal path noise 22 Hz to 22 kHz unweighted (inputs 150 Ω terminated)
Input Output Gain Output noise EIN
DL231 I/O Box DL231 I/O Box 0 dB -86 dBu -86 dBu
DL231 I/O Box DL231 I/O Box 45 dB -81 dBu -126 dBu
Dynamic range 22 Hz to 22 kHz unweighted
Input Output Gain Maximum level Dynamic range
DL231 I/O Box DL231 I/O Box 0 dB +21 dBu 107 dB
DL231 I/O Box DL231 I/O Box 45 dB +21 dBu 102 dB
System Inputs and Outputs
Input and Output Characteristics
Analogue input characteristics
Input Load Z Gain Max. level Connector
DL231 I/O Box 10 kΩ -2.5 dB to +45 dB +24 dBu XLR
Analogue output characteristics
Output Source Z Gain Max. level Connector
DL231 I/O Box 50 Ω 0 dB +21 dBu XLR
48 kHz digital I/O characteristics
Type AES50
Channels24
Data length 24-bit
I/O Bi-directional
Description notes Conforms to AES50-2011
Connector EtherCON XLR
96 kHz digital I/O characteristics
Type AES50
Channels24
Data length 24-bit
I/O Bi-directional
Description notes Conforms to AES50-2011
Connector EtherCON XLR
I/O Box inputs
Connector 3-pin XLR balanced
A/D converter 24-bit, 96 kHz and 128 times oversampling
I/O Box outputs
Connector 3-pin XLR balanced
D/A convertor 24-bit, 96 kHz and 128 times oversampling
MIDI
MIDI connector In, out and through on 5-pin DIN (for use with MIDAS consoles only)
48 kHz I/O digital system inputs and outputs
System connector A (X)1 x AES50 (24 channels of bi-directional digital audio) on EtherCON XLR
Redundant connector A (Y) 1 x AES50 (24 channels of bi-directional digital audio) on EtherCON XLR providing redundant backup
System connector B (X)1 x AES50 (24 channels of bi-directional digital audio
) on EtherCON XLR
Redundant connector B (Y) 1 x AES50 (24 channels of bi-directional digital audio) on EtherCON XLR providing redundant backup
96 kHz I/O digital system inputs and outputs
System connector A (X)1 x AES50 (24 channels of bi-directional digital audio) on EtherCON XLR
Redundant connector A (Y) 1 x AES50 (24 channels of bi-directional digital audio) on EtherCON XLR providing redundant backup
System connector B (X)1 x AES50 (24 channels of bi-directional digital audio
) on EtherCON XLR
Redundant connector B (Y) 1 x AES50 (24 channels of bi-directional digital audio) on EtherCON XLR providing redundant backup
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