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4
S Y S T E M D E S C R I P T I O N
The functional elements of the systems are shown in FIG. 2.
FIG. 2
RS 232C
TTL USER I/O
HSD (Relay)
PAD (ADD. DATA)
The signal to be monitored is connected to the 2-Mbit/s interface of the ETI
Audio Decoder system. The incoming signal will automatically and regener-
ated be connected without any modification to the 2-Mbit/s output interface.
One of the ETI audio streams can be decoded using the ISO/MPEG Layer II
decoder and is available as an analogue audio signal.
The audio signal can also be in the digital format AES/EBU if the system is
equipped with the optional AES/EBU module. The intgrated Sample Rate
Converter (SRC) synchronises the audio signal to a connected external clock.
Alternatively, the clock can also be supplied by the system (internal clock).
The Windows PC software allows the configuration and control of the system
over an RS232 interface. The User I/O interface and the HSD Relay interface
can be used for external alarm signalling.
Remark
Functional Restrictions
i
Presently the decoding of audio signals with 24-kHz sampling frequency is
not supported.
PAD (Program Associated Data) is not available at the ADD. DATA interface.
BLOCK DIAGRAM OF THE MAGIC ETI DECODER
Interface Unit
ISO/MPEG Decoder
S y s t e m
D e s c r i p t i o n
Line
Interfaces
Clock
2 Mbit/s Module
2-Mbit/s
Audio
Interfaces
Clock (SRC)
AES/EBU
Audio
Module
Audio Aux
PA G E 1 5
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