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DL231
7. Technical Specifications
This section contains the technical specifications for the DL231 I/O unit.
Due to our policy of continual improvement, Midas reserves the right to alter the
function or specification at any time without notice.
General Statistics
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
General Specifications
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
Audio Performance Specifications
Frequency response
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
Gain error at 1 kHz
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
Input CMRR Typical
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
Distortion at 0 dBu
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
Distortion at +20 dBu
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
20 Hz
20 kHz
+0 dB to -1 dB
+0 dB to -1 dB
+0 dB to -1 dB
+0 dB to -1 dB
Max.
Min.
+1 dB
-1 dB
+1 dB
-1 dB
100 Hz
1 kHz
70 dB
70 dB
90 dB
90 dB
1 kHz
10 kHz
0.01%
0.01%
0.03%
0.03%
1 kHz
10 kHz
0.01%
0.01%
0.03%
0.03%
Signal path noise 22 Hz to 22 kHz unweighted (inputs 150 Ω terminated)
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
Dynamic range 22 Hz to 22 kHz unweighted
Input
Output
Gain
DL231 I/O Box
DL231 I/O Box
0 dB
DL231 I/O Box
DL231 I/O Box
45 dB
System Inputs and Outputs
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
Input and Output Characteristics
Analogue input characteristics
Input
Load Z
Gain
DL231 I/O Box
10 kΩ
-2.5 dB to +45 dB
Analogue output characteristics
Output
Source Z
Gain
DL231 I/O Box
50 Ω
0 dB
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
Quick Start Guide
Output noise
EIN
-86 dBu
-86 dBu
-81 dBu
-126 dBu
Maximum level
Dynamic range
+21 dBu
107 dB
+21 dBu
102 dB
Max. level
Connector
+24 dBu
XLR
Max. level
Connector
+21 dBu
XLR
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