Quantec Zombies 12xx Series, Operation Manual

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2. Menu Structure - 2.4 CS Data symbolic
ZOMBIEs 12xx
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Automatic »intelligent« Routing of the AES18 data stream on the
AES/EBU ZOMBIE 1203:
In order to integrate an external AES/EBU compatible device which is connected to the local loop
into the studio AES18 communication, the following transparency test is automatically run after
every modification to the LL receiver.
1. Send a »user data transparency test parcel « to the LL output.
2. Check whether this parcel:
is returned by the external device and reappears at the LL input
or disappears without trace, i.e. cannot be located at the LL input
If the device is transparent for user data, the data stream is routed through the external device, e.g.
the user data which leaves the LL output arrives back at the LL input.
The device attached to the local loop is integrated into the network.
If the external AES/EBU device blocks die user data, the data stream is routed around the external
device, e.g. from the GL input directly to the GL output. Only a copy is generated at the LL- output.
The device attached to the local loop is bypassed, but can listen in.
Hands On
The user data (»UD«) of the selected channel is treated as a group of HDLC-Frames according to
AES18 protocol , i.e. unwrapped, analyzed and/or routed through to the local loop.
Possible reactions generated by the ZOMBIE itself to incoming AES18-Stimuli, such as display
updates, are organized into new HDLC frames and incorporated into the continuous data stream
according to the AES18 standard format.
The ZOMBIE never processes data from more than one user data channel in the AES18 specified
HDLC protocol. The second user data channel is routed transparently and is free.