The Digital Microphone Interfaces in
general
Equipment that supports the AES 42 standard can process the output signals of
Solution-D microphones directly. In all other cases, the DMI-2 portable or DMI-8
digital microphone interface is used. The DMIs convert the AES 42 data format
supplied by the microphone into an AES/EBU signal.
The Interface is operated via the Neumann RCS remote control software, which is
installed on a desktop or laptop computer. The computer is connected to the DMI
via a USB port and a USB to RS 485 interface converter. If a large number of
microphones is used, several DMI-8's can be cascaded. In this case, each digital
microphone interface can be addressed individually.
In addition to a word clock input and output, the DMIs also have an internal
word clock generator. If no master word clock signal (e.g. from a mixing
console) is present at the input, the DMI internal word clock is used
automatically to synchronize the microphone channels, and the signal is switched
to the word clock output.
External commands such as "On Air" (red light) can be controlled via a 9-pin
user port.
The DMI-8
The DMI-8, an eight-channel version of the digital microphone interface is
considerably simplifying the setup for multichannel applications.
In addition to the proven functions of the two-channel DMI-2:
- AES 42 to EBU conversion
- Powering, remote control and synchronization of the microphones without a
sample rate converter (AES42, mode2)
- Automatic word clock or AES 11 synchronization
- All sample rates, from 44.1 kHz to 192 kHz
- Complete control and storage of the settings via Mac or PC
The DMI-8 also offers the following features:
- The capability of cascading up to 128 channels
- Level meter and gain setting on the front panel, operable even without a
computer
- D-sub 25 outputs with Tascam� and Yamaha� pin assignments
- Optical ADAT� interface
- Open architecture for later connection to other multi-channel interfaces and
audio networks, such as EtherSound� and MADI
The DMI-8 offers several possibilities for easy integration into audio networks.
The ES100 (DMI-8) module permits integration into EtherSound networks.
Explanation Mode 2:
The DMI performs a frequency/phase comparison between the word clock signal
recovered from the mic signal, and the word clock of the DMI. From the phase
deviation thus determined, the DMI calculates a control signal which is
transmitted via the remote control data stream to the mic, where it controls the
frequency of the internal quartz oscillator.
Delivery range
Digital Microphone Interface DMI-8
CD with RCS software and USB driver
Order Information
DMI-8 EU silver - Cat. No. 533130
DMI-8 UK silver - Cat. No. 533132
DMI-8 US silver - Cat. No. 533131
Network Module, DMI-8 ES100 - Cat. No. 539398
DMI-8 connection set (USB cable, RJ 45 patch cable, USB 485 converter - Cat. No.
533126
|
| Operating
temperature |
0
�C � +45 �C |
| Storage
temperature |
�20 �C � +70 �C |
| Relative
humidity |
max. 90 % at +20 �C |
| AES42
inputs |
8x
XLR3F , Audio data in accordance withAES/EBU (AES3) data format, Digital
phantom power (DPP)Remote control data |
| Phantom
power (DPP) |
+10 V, max. 250 mA per channel, short-circuit proof |
| Remote
control data |
Pulses (+2 V), superimposed on the phantom power, approx. 750 bits/s or
9,600 bits/s (depending on the microphone) |
| Outputs |
2x
SUB-D 25, AES/EBU (AES3) data format, Yamaha� and Tascam� pinout,
1x Toslink, ADAT� format up to 48 kHz, 1x RJ 45, GN format up to 192
kHz, incl. power-out pin: approx. +15 VDC, max.1 A, short-circuit-proof |
| Sampling
rates supported |
44,1 / 48 / 88,2 / 96 kHz /176,4 kHz/ 192 kHz |
| Microphone
synchronization |
AES42 � Mode 2 (synchronous mode) Microphone clock control via PLL |
| DMI-8
Synchronization |
automatically to an external word clock or AES11 signal, if present,
otherwise the internal word clock generator is activated. |
| Word clock
(or AES11) input |
BNC |
| - Vin |
>100 mV at 75 ohms |
| Word clock
(or AES11) output |
BNC |
| - Vout |
=
Vin (external synchronization) |
| - Vout |
approx. 1.5 V at 75 ohms
(internal word clock generator) |
| Internal
word clock generator |
44,1 / 48 / 88,2 / 96 kHz / 176,4 /
192 kHz, Accuracy �25 ppm |
| Indicators |
Power, Ext Word Clock, Valid,Level (microphone) |
| Control
elements |
8x
Channel SelectGAIN +/� |
| Control bus |
2
x RJ 45 ports; connection to computer USB port via the Neumann USB 485
interface converter; connected in parallel for the purpose of cascading.
RS 485 with additional power-out pin (approx. +11.3 V, max. 500 mA) |
| Device
address (ID) |
0
to 15, adjustable viacoding switch on the backof the device |
| User port |
9-pin sub-D, 1 switch function per channel (Mute and/or Light 1/Light 2
selectable) |
| Power
supply |
90
V to 240 V; 50/60 Hz |
| Power
consumption |
<
55 VA |
| Dimensions
(W x H x D) |
483 x 88 x 210 mm |
| Weight |
approx. 2,8 kg |
|
|
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