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trol Software, the LEDs can be set to four diff erent
brightness levels or switched off .
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 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 op-
erated in synchronous mode (Mode 2), 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. Also, the output of
two microphone signals as one AES 3 stereo sig-
nal is possible only if the microphones are syn-
chronized with one another.
Parameters which can be remote controlled
via the AES 42 interface
Polar pattern: Switching the polar pattern is
achieved by varing the polarization voltage of the
rear capsule half. During the reloading process
the microphone is temporarily muted.
Low Cut: Acccording to AES42 there are four set-
ting for the low cut: off , 40 Hz, 80 Hz and 160 Hz.
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.
During the reloading process the microphone is
temporarily muted.
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. The switching process is click-
less.
Peak limiter: The very fast peak limiter has an ad-
justable threshold, and 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 over a broad frequency
range, 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 and muting of
the output signal and the LEDs can be controlled
remotely.
The software in the microphone can be updated
via the Neumann DMI-2. Therefore software up-
dates are also available to existing customers.
Please refer to the RCS manual for details con-
cerning 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
Permissible atmospheric conditions
1)
Operating temperature range .......... 0 °C to +40 °C
Storage temperature range ...........–20 °C to +70 °C
Humidity range .....................0 % to 99 % at +20 °C
0 % … 95 % at +60 °C
Acoustical op. principle ............Double diaphragm
pressure gradient transducer
Directional
pattern ..........................Om n i...car d ioid. ..fi gure-8,
15 patterns in total
Frequency range ............................ 20 Hz to 20 kHz
Sensitivity
2)
............................................. –44 dBFS
Equivalent noise level,
CCIR
4)
...............................................................19 dB
Equivalent noise level,
A-weighted
4)
..................................................8 dB-A
Signal-to-noise ratio
3)
,
CCIR
4)
...............................................................75 dB
Signal-to-noise ratio
3)
,
A-weighted
4)
...................................................86 dB
Maximum SPL
at 0 dBFS
3)
............................................. 138 dBSPL
Dynamic range
including capsule
4)
.......................................130 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 humidity.
2)
at 1 kHz, 0 dB gain, and 94 db SPL
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
Remote controlled functions
Pre-attenuation ..........................0/–6/–12/–18 dB
High-pass fi lter ..........................Off /40/80/160 Hz
Digital gain .................................................0...63 dB
in steps of 1 dB, clickless
Test signals ..........................Off , 1 kHz (–48 dBFS),
pink noise (–35 dBFS),
white noise (–43 dBFS)
Compressor/Limiter ......................................On/Off
Lower cut-off frequency
of the working range ..........Flat/1 kHz/2 kHz/4 kHz
Max. gain reduction:
Flat mode ...................................................... > 63 dB
1 kHz/2 kHz/4 kHz ........................................> 20 dB
Compression ratio ..........................1.2:1/1.5:1/2:1/
3:1/4:1/6:1/8:1/>100:1
Threshold .........................–63 dBFS..–10...0 dBFS,
in steps of 1 dB
Attack time ..............0/0.1/0.3/1/3/10/30/100 ms
Release time ..................0.05/0.1/0.2/0.5/1/2/5 s
(for a level change of approx. 10 dB )
Peak limiter ....................................................On/Off
Attack time .................................–160 µs (negative)
Release time .................. approx. 50 ms to 150 ms
(signal-dependent)
Threshold ......................................Off : 0 dBFS fi xed
On: –15 dBFS to 0 dBFS,
in steps of 1 dB
Mut e ................................................................On /O ff
Phase (polarity) ......................................... 0°, 180°
Signal light ......................LED 1 (red), LED 2 (blue),
brightness adjustable
Sampling rates ..44.1/48/88.2/96/176,4/192 kHz
Latency:
44.1/48 kHz ...........................................52 samples
88.2/96 kHz ...........................................61 samples
176,4/192 kHz ......................................121 samples
Synchronization
Asynchronous operation (free-running),
frequency stability ................................... ± 25 ppm
Synchronous operation,
pulling range .................................. min. ± 100 ppm
Power supply
(phantom power complying with AES 42)
Supply voltage range ...................... +6 V to +10.5 V
Current consumption .........................max. 220 mA
Connector ..................................................... XLR 3 M
Dimensions ...................................Ø 63.5 x 185 mm
Weight .............................................................700 g