ESI-121-24 - INCAS³ Solutions

ESI-121-24
- data sheet
INCAS
Solutions
key Features
The Ethernet Sound Interface ESI-121-24 is a networked
audio device for excellent quality sound capturing, capable
of recording within an extensive sound range. ESI converts
analog microphone signals to digital audio streams, and a
built-in processor enables connectivity and real-time audio
streaming to Ethernet.
The digitizer board features two channels and due to its
large bandwidth the ESI-121-24 is able to record analog
audio signals up to 96 kHz with 24 bit resolution. In
combination with an ultra-low noise floor, this offers a
dynamic range of more than 120 dB. Analog audio input
is provided by two mini-XLR connectors and includes a
switchable phantom power.
Frequency response
The frequency response of the ESI-121-24 is characterized for
a 150 mV input signal (approximately −5 dBFS).
0
Channel A
Channel B
Response [dB]
-5
specifications
Analog input channels
2 x mini XLR (chA/chB)
ADC resolution
max. 384 kHz, 24 bit
Dynamic range
> 120 dB (20 kHz, unweighted)
0 − 280 mVrms
Bandwidth at -0.5 dB
50 Hz to 48 kHz (sample rate 192 kHz)
50 Hz to 96 kHz (sample rate 384 kHz)
Sensitivity
0.35 %FS / mV (at 1 kHz)
17 nVrms/bit
Noise floor
< −140 dB/√Hz
THD + N
< −86 dB
Level THD + N
< −98 dB
Phantom power
0 or 48 V (switchable)
Power requirements
5 W; recommended 5.2 V (2 A peak)
Output
Audio stream via Ethernet
Time synchronisation
Network Time Protocol (NTP)
Size
108 x 60 x 104 mm3 (w x h x l)
Weight
392 g
-10
THD + N
-15
-20
102
103
Frequency [Hz]
104
105
The total harmonic distortion and noise versus amplitude is
characterized for the following settings: 1 kHz input signal,
60 Hz rejection base frequency bandwidth, 20Hz-20kHz
frequency limits, 256k point-FFT, no averaging. Amplitude
reference: 0.25 V (approximately 0 dBFS).
0
noise floor
Channel A
Channel B
The noise floor of the ESI-121-24 is characterized using a 256k
point-FFT, Hann window, 20x averaging.
-20
THD + N [dB]
0
Channel A
Channel B
FFT Level [dBFS]
-40
-40
-60
-80
-80
-100
-120
-50
-160
102
103
Frequency [Hz]
104
INCAS³ Solutions BV
Dr. Nassaulaan 9
9401 HJ Assen
The Netherlands
E [email protected]
www.incas3-solutions.com
105
-40
-30
-20
Input amplitude [dBr]
-10
0

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