Neumann KM D Bedienungsanleitung Seite 5

well as the two-channel Digital Microphone Inter-
face (DMI-2) with the accompanying RCS control
software for remote controlling all microphone
characteristics (see also the "Technical data" sec-
tion).
The consumption of power results in slight warm-
ing of the microphone, which increases with
shorter cable lengths and higher sampling rates.
The KM D microphone series is a modular system
which allows to change capsules with diff erent
characteristics. The following capsules are cur-
rently available:
KK 183 (nx): Omnidirectional characteristic
KK 184 (nx): Cardioid characteristic
KK 185 (nx): Hypercardioid characteristic
Additional capsules will follow. The capsules can
also be ordered separately. All parts are available
in classic satin nickel fi nish or with a non refl ec-
tive black nextel fi nish (nx).
4. Setup
Mounting the microphone
Using the mount provided, attach the microphone
to a stable, sturdy stand. If necessary, use an elas-
tic suspension from our range of accessories to
suppress impact sound by means of mechanical
isolation.
Extremely low-frequency signals can result from
interference such as structure-borne noise or pop
and wind noise. In order to suppress such noise
signals, we recommend the use of an elastic sus-
pension, a windscreen or a popscreen, available
as accessories.
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Connecting the microphone
An incorrect supply voltage can damage
the microphone!
Connect the microphone to microphone inputs
and to equipment which supplies phantom
power in accordance with AES 42. *)
Very high signal levels can damage
loudspeakers and your hearing!
Reduce the volume of connected playback equip-
ment before connecting the microphone. This is
also advisable in order to avoid acoustic feedback.
Connect the microphone by means of an XLR cable
to the AES 42 microphone input of the DMI-2 Digi-
tal Microphone Interface, to the Neumann con-
nection kit or to other audio equipment along to
AES 42 standard.
With a correct power supply, a blue LED on the mi-
crophone indicates that the microphone is ready
to operate. When the microphone is switched
on, the LED at fi rst glows dimly, and after a short
time shines with the preset brightness. When the
DMI-2 Digital Microphone Interface is used, the
LED can be set to four diff erent brightness levels
and switched off by means of the Remote Control
Software.
When connecting the cables, ensure that the con-
nectors are locked correctly.
Long cables and multiple connectors lead to a
drop in the supply voltage and to a deterioration
in jitter behavior, particularly in the case of high
sampling rates. Therefore, to the greatest extent
possible, use continuous cable between the mi-
crophone and subsequent equipment, and for
longer distances use AES/EBU cable exclusively
(with an impedance level of 110 ohms).
Ensure that the microphone and all equipment in
the digital signal chain are synchronized. If the
Neumann Digital Microphone Interface is used,
the connected microphones should always be
operated in synchronous mode, whether or not
sample rate converters are used in the subse-
quent signal chain. This will ensure very eff ective
jitter suppression in the DMI (as of hardware ver-
sion 3). The output of two microphone signals in
an AES 3 stereo signal is also possible only if the
microphones are synchronized with one another.
*) See also chapter "Safety Instructions".
Parameters which can be controlled
remotely via the AES 42 interface
Pre-attenuation: Pre-attenuation is achieved by
reducing the capsule voltage. If pre-attenuation is
activated, the dynamic range is shifted by the cor-
responding value to higher sound pressure levels.
Gain: Gain is carried out exclusively in the digital
domain, thus avoiding the additional noise and
possible eff ects on the sound which can occur in
analog processing.
Peak limiter: The very fast peak limiter has an
adjustable threshold, and generally prevents
overloading or clipping of the audio signal in the
signal path.
Compressor/Limiter: As well, a compressor/lim-
iter with completely adjustable parameters is
provided. It can function in a broad band, or as
a high-frequency compressor/limiter (de-esser)
in one of three selectable frequency ranges. All
important parameters are adjustable.
In addition, the sampling rate, the synchroniza-
tion mode, test signals, the polarity of the output
signal and the LED can be controlled remotely.
The software in the microphone can be updated
via the Neumann DMI-2. Therefore software en-
hancements are also available to existing custom-
ers. Please refer to the RCS manual for details
concerning the updates.
5. Shutdown and Storage
When disconnecting a cable, always pull only on
the connector and not on the cable itself.
Microphones which are unused for prolonged
periods should be stored under normal ambient
atmospheric conditions, and should be protected
from dust. For this purpose, use a lint-free, air-
permeable dust cover or the original packaging of
the microphone.
6. Technical data
and connector assignments
Permissible atmospheric conditions 1)
Operating temperature .................... 0 °C to +40 °C
Storage temperature .....................–20 °C to +70 °C
Relative humidity .................0 % to 99 % at +20 °C
0 % ... 95 % at +60 °C
Conversion principle .................Pressure/pressure
gradient transducer
Directional
characteristic 5) .......Omni/cardioid/hypercardioid
Frequency response ...................... 20 Hz to 20 kHz
Free-fi eld sensitivity 2) ...........–41/–39/–43 dBFS
Equivalent noise level,
CCIR 4) .................................................24/22/24 dB
Equivalent noise level,
A-weighted 4) ...................................13/13/15 dB-A
Signal-to-noise ratio 3) ,
4)
CCIR ................................................ 70/72/70 dB
3)
Signal-to-noise ratio ,
A-weighted 4) ......................................81/81/79 dB
Maximum SPL
at 0 dBFS 3) ........................... 135/133/137 dBSPL
Dynamic range
including capsule 4) ......................122/120/122 dB
A/D conversion ...........................Neumann process
(patented), 28-bit
internal word length
Digital signal processing ..... Fixed-point, variable
internal word length
28 bits to 60 bits
Sampling rates .................................44,1/48/88,2/
96/176,4/192 kHz
Output data format ............................ 24 bits as per
AES/EBU (AES 3)
At 0 dB pre-attenuation and 0 dB gain.
1) All values are for non-condensing moisture.
2) at 1 kHz into 1 kohms rated load impedance.
3) re 94 dB SPL
4) according to IEC 60268-1;
CCIR-weighting acccording to CCIR 468-3, quasi peak;
A-weighting according to IEC 61672-1, RMS
5)
For KM 183 D, KM 184 D and KM 185 D
5)
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5)
5)
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