Date printed: 24.01.12
24
D21m System
6.2 analog I/O Cards
6.2.1 Mic/line In Card
(
and
)
A949.0427
Four analog microphone/line inputs, electronically balanced, with 24 bit,
44.1/48/88.2/96 kHz delta-sigma A/D converters. Four analog split outputs,
electronically balanced. Green ‘signal present’ and yellow ‘phantom power’
indicators per channel. Mic/line sensitivity, gain setting in 1 dB steps, low-
cut filter, soft clipping and 48 V phantom power on/off are controlled by the
console software. Inputs and split outputs on a standard 25-pin D-type con-
nector (female).
Gain setting: 15 dBu 0 dB
FS
, unless otherwise noted.
Input sensitivity
(for 0 dB
FS
)
–60…+26 dBu
Input impedance
1.8 k
Ω
Split out gain
(input sensitivity –60…+3 dBu)
0 dB
(input sensi4…+26 dBu)
–20 dB
Split out impedance
50
Ω
Equivalent input noise
(R
i
200
Ω
, max. gain)
–124 dBu
Crosstalk
(1 kHz)
< –110 dB
Frequency response
(30 Hz-20 kHz)
–0.2 dB
THD&N
(1 kHz, –1 dB
FS
)
< –97 dB
FS
(20 Hz-20 kHz, –30 dB
FS
)
< –111 dB
FS
CMRR
(30 Hz-20 kHz, all gain settings)
> 55 dB
(1 kHz, input sensitivity –10 to +26 dBu for 0 dB
FS
) typ. 100 dB
Low-cut filter
75 Hz / 12 dB/oct.
Input delay
(local)
38 samples (0.79 ms @ 48 kHz)
(remote)
45 samples (0.94 ms @ 48 kHz)
Current consumption
(7 V)
0.2 A
(±15 V)
0.25 A
Operating temperature
0-40 °C
Backplane Connector
Mic/Line In 1
A
D
48 V Phantom Pwr
0 dB*
–20 dB*
A
D
0 dB*
–20 dB*
0 dB*
–20 dB*
0 dB*
–20 dB*
* 0 dB for input sensitivity –60...+3 dBu, –20 dB for input sensi4...+26 dBu
Mic/Line In 2
Mic/Line In 3
Mic/Line In 4
Split out 1
Split out 2
Split out 3
Split out 4
Control Logic
Sensitivity
–60...+26 dBu
INS
INS
INS
INS
Insert Connector
Sensitivity Control
High-Pass Filter
Insert Control
