getting started

20 21DL231 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 kHz 22 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 weight 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
Channels 24
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
Channels 24
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