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 Interfaces are operated via the Neumann RCS remote control software, which
is installed on a desktop or laptop computer. Some parameters of the DMI-2
portable can be accessed directly at the interface. 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 the 9-pin
user port of the DMI-2 and DMI-8.
The DMI-2 portable
The DMI-2 portable is the ideal digital microphone interface solution for ENG
and other field recording applications.
It supports two digital microphones and allows adjustment of the Gain, Pre
Attenuation and Low Cut filter settings at the device. The front panel display
shows the selected gain and, by means of bar graphs, shows the current signal
level and any gain reduction. Of course, these functions can also be operated
via the RCS software.
Microphone presets can be stored inside the DMI-2 portable and recalled for use
in the field.
Delivery range
1 x Digital Microphone Interface DMI-2 portable
1 x CD with RCS software and USB drivers
Order Information
DMI-2 portable silver - Cat. No. 542400
|
| Ports |
2x
AES42 IN (XLR3F),
1x AES/EBU (AES3) OUT (XLR3M),
2x Word Clock IN/OUT (BNC),
1x Remote Control (USB) |
| Indicators |
Monochrome display, bar graphs for gain, level and gain reduction, LED�s
for Power, Battery status, Synchronization and Valid |
| 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) |
| Microphone
synchronization |
AES42 � Mode 2 (synchronous mode) Microphone clock control via PLL |
| DMI-2
portable 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 |
| Control
elements |
2x
push-switch rotary encoder |
| CTL
(Control interface) |
1x
USB port |
| Power
supply |
DC
10-18 V (Hirose) , NP1 rechargeable battery or AC/DC converter |
| Power
consumption |
<
8 VA |
| Dimensions |
(W
x H x D) 186 x 44 x 126 mm |
| Weight |
approx. 625 g |
|
|
|
