Word Clock - Neumann Mca-Es Bedienungsanleitung

or AES11) as primary master, otherwise to the
Ethersound network.
• Support of sampling rates 44.1 / 48 kHz (high-
er sampling rates on request).
• Providing a control bus (RS 485) for transmit-
ting and processing bidirectional control data.
For this purpose Neumann supplies the RCS
remote control soft ware for use with a PC or
Mac.
Indicators (Fig. 1)
POWER
Indicates that the equipment is ready for opera-
tion. During the startup process, the indicator is
slightly dimmed.
ES NETWORK
Indicates the Ethersound network link to the IN
port and the OUT port. The indicators TX/RX blink
while transmitting/receiving data at the corre-
sponding port.

WORD CLOCK

EXT
Indicates that the MCA-ES is synchronized to the
Ethersound network or to the WORD CLOCK (or
AES11) input. If the device runs as primary master
and no external synchronization signal is detect-
ed, 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 yellow/green when the MCA-ES has
been successfully synchronized to the external
synchronization signal/Ethersound network. Con-
tinuous blinking of the indicator means that an
invalid synchronization signal is received by the
DMI-8; this may be due to an invalid word clock
frequency (+/–50 ppm) or to excessive jitter val-
ues. Red blinking indicates synchronizing to the
Ethersound network and feeding in an external
synchronization signal simultaneously. The exter-
nal synchronization signal is ignored in this case.
44.1 48 88.2 96 176.4 192
Indicates the Word Clock Frequency
VALID
Indicates a valid GN audio data stream from the
DMI-8 to the MCA-ES. The indicator blinks while
the connected DMI-8 is synchronized. It shines
continuously when a valid data stream is being
received and the DMI-8 has been successfully
synchronized. The MCA-ES Word Clock output is
required to be connected to the DMI-8 word clock
input.
Ports (Fig. 2)
GN IN 1..8
Eight RJ 45 inputs for connecting the DMI-8
GN audio signals. Moreover the MCA-ES is pow-
ered via this connection. Two or more connected
DMI-8 guarantee a redundant power supply for
the MCA-ES.
WORD CLOCK (OR AES11) IN/OUT
In digital studio setups, a central word clock or an
AES11 signal is usually used for synchronizing the
equipment. The MCA-ES automatically synchro-
nizes itself to this sync signal running as primary
master. If an Ethersound network is fed into the
MCA-ES IN port, the device synchronizes with
highest priority to the network.
If there is no valid synchronization signal at the
BNC input and no link to an Ethersound network
at the IN port, the MCA-ES automatically acti-
vates an internal word clock generator. The inter-
nally generated word clock signal is available at
the BNC output.
Even in the case of network- or external synchro-
nization, the internal clock generator (VCXO) of
the MCA-ES remains active and is synchronized
with the network or the external sync signal by
means of a phase-locked loop (PLL), which results
in very eff ective suppression of jitter.
CONTROL BUS (RS 485)
RJ 45 ports for connecting the DMI-8 or a com-
puter (PC or Mac). Standard Ethernet (patch)
cables are used (Shielded Twisted Pair – STP or
Unshielded Twisted Pair – UTP).
Data transfer is performed via an RS 485 inter-
face with an additional power-out pin for the op-
tional supply of an external control device.
Attention: These RJ 45 ports of the MCA-ES
must not be connected to an Ethernet or an
Ethersound network.
There are two ways to remote control the MCA-ES
and the connected DMI-8 and microphones by the
RCS:
EN
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