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Contents
Installation and Maintenance Manual Nimbra 300 Series
©2006 Net Insight AB, All rights reserved
Note:
In order to comply with the EMC directives, unused
output ports must be terminated with a 75-ohm
termination plug.
(Two termination plugs are delivered together with the
ASI Transport module.)
8 x ASI Transport Access Module
The 8 x8 ASI Transport Module provides simultaneous transport of up to eight
independent MPEG-2 Transport Streams (TS), IN or OUT. The capacity across
the network of each transport channel can be configured to match the actual size
of the TS. The ASI board can handle MPEG-2 transport streams between 2 –
212 Mbps.
The ASI Transport Access Module accepts and transmits MPEG-2 Transport
streams according to ISO/IEC 13818-1 (ITU-T H.222), with either 188 byte
packets or 204 byte packets. An ASI channel across the network can be unicast
to one receiving port or multicast to several receiving ports.
The board also has one monitoring port. Each port can duplicate either the
incoming or outgoing signal of an in-out port pair. They can thus be used for
monitoring the incoming ASI stream or for duplicationg an outgoing stream (“bi-
casting”).
The ASI physical interface, Transmit and Receive, are Female 75 Ohm, BNC
connectors.
Multicast is a way to transport data from one single source to many destinations
without any need to duplicate data on multiple channels. Each individual
destination point can either be network or source routed. They can furthermore
be dynamically added and deleted while a connection is still administratively up.
The front panel of the module is shown below.
Figure 17. Front panel
The module provides eight video ports and one monitoring port. Refer to chapter
Specifications for data.
In normal operation the Power LED is lit and the Remove indicator LED is off.
The Request removal button is used when the Module should be replaced.
Status indicator LEDs provide information about the status of the respective
port. Refer to the Specifications chapter for more information about the
indicators.
To insert, connect or replace the ASI Transport module, refer to chapter
Hardware Maintenance.
