Network operators can use the R&S®AEM100 multiplexer to expand their existing ATSC
transmitter networks to include ATSC Mobile DTV – without a major installation
effort. As a key component in mobile digital networks, the R&S®AEM100 feeds
the mobile data into the existing ATSC multiplex. A multiplexer for ATSC Mobile
DTV is part of the active signal path, for which failsafe, redundant
configurations are common. Rohde & Schwarz has enhanced the R&S®AEM100
accordingly with a 1+1 redundancy option.
The new solution ensures that a bit-identical
signal is applied synchronously to the outputs of the two multiplexers. A
higher-level redundancy controller is not needed: The two multiplexers check
each other’s results. The two instruments communicate with each other. If, due
to an error, one of the multiplexers does not receive the input signals
completely or processes them incorrectly, the error is immediately detected and
eliminated. This ensures interrupt-free transmission. Viewers receive their
Mobile DTV program without any noticeable effect on transmission quality.
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