Neumann.Berlin DMI-8 Bedienungsanleitung Seite 15

ceived and the microphone has been successfully
synchronized.
LEVEL
Peak Level Indicator (multicolor LED) for the mi-
crophone signal:
• Off: below –60 dBFS
• Green: –60 dBFS to –12 dBFS
• Orange: –12 dBFS to –1.5 dBFS
• Red: above –1.5 dBFS
EXT WCLK
Indicates that an external synchronization signal
is being fed to the WORD CLOCK (or AES11) input.
If no external synchronization signal is detected,
the indicator will not be lit up. The indicator
blinks if a signal is present but synchronization
has not yet been achieved. The indicator shines
continuously when the DMI-8 has been success-
fully synchronized. Continuous blinking of the in-
dicator means that an invalid synchronization sig-
nal is being received by the DMI-8; this may be due
to an invalid word clock frequency (+/–50 ppm) or
to excessive jitter values.
Control elements
SELECT
A microphone channel can be selected by press-
ing the corresponding button. The VALID indica-
tor for the channel will then appear orange rather
than green. Pressing this button again or press-
ing another button deselects the microphone
channel.
GAIN +/–
Pressing the GAIN buttons changes the digital
gain in the microphone of the selected channel in
steps of 1 dB.
Ports (Fig. 2)
MAINS
Disconnecting the DMI-8 to/from the mains power
supply:
• Pull the mains plug out of the wall socket.
WORD CLOCK (OR AES11) IN/OUT
In digital studio setups, a central word clock or an
AES11 signal is usually used for synchronizing the
connected equipment. The DMI-8 automatically
synchronizes itself to this sync signal.
If there is no valid synchronization signal at the
BNC input, the DMI-8 automatically activates an
internal word clock generator. Either the received
external synchronization signal or the internally
generated word clock signal is available at the
BNC output.
Even in the absence of power, an external sync
signal is transferred by the DMI-8 directly to the
BNC output. If no cable has been attached to the
BNC output, a termination (75 ohms) is automati-
cally enabled at the BNC input.
Even in the case of external synchronization, the
internal clock generator (VCXO) remains active
and is synchronized with the external sync signal
by means of a phase-locked loop (PLL), which re-
sults in very effective suppression of jitter.
AES42 IN
Eight 3-pin XLR inputs for connecting digital mi-
crophones.
AES/EBU OUT
25-pin sub-D connectors with Yamaha and Tas-
cam pinout for the AES/EBU output signal.
The AES/EBU signal includes 2 standard audio
channels.
The distribution of the audio data of adjacent
mono microphone channels between the audio
channels of the corresponding AES/EBU output
signal is as follows:
• Channel 1 AES/EBU OUT
Left: microphone 1
Right: microphone 2
• Channel 2 AES/EBU OUT
Left: microphone 3
Right: microphone 4
• Channel 3 AES/EBU OUT
Left: microphone 5
Right: microphone 6
• Channel 4 AES/EBU OUT
Left: microphone 7
Right: microphone 8
Digital stereo microphones are supported at odd-
numbered AES42 microphone inputs only. In this
case the audio data of the microphones are routed
to the left and right channels of the corresponding
AES/EBU output.
EN
15