Rohde & Schwarz is introducing its new R&S AEM100 multiplexer that enables network operators to expand their existing ATSC transmitter networks for ATSC Mobile DTV quickly and reliably. The company says the AEM100 is the only multiplexer on the market that allows operators to leverage their existing network infrastructure. It can be integrated into the […]
Rohde & Schwarz is introducing its new R&S AEM100 multiplexer that enables network operators to expand their existing ATSC transmitter networks for ATSC Mobile DTV quickly and reliably.
The company says the AEM100 is the only multiplexer on the market that allows operators to leverage their existing network infrastructure. It can be integrated into the operator’s system and is compatible with all commercially available transmitters. The new standard, which Rohde & Schwarz played a major role in developing, makes it possible to set up frequency-efficient single-frequency networks (SFNs) that can be implemented using transmitters from Rohde & Schwarz.
Rohde & Schwarz already offers the complete product portfolio for the ATSC Mobile DTV standard, which is to be adopted by the end of the year. In addition to the main ATSC transport stream, ATSC Mobile DTV transmits video and audio data for mobile receivers. As a key component for handling ATSC Mobile DTV, the AEM100 inserts the mobile data into the existing ATSC multiplex.
A special error-protection technique ensures interference-free reception on the mobile user equipment. Using complex error-correction algorithms (Reed-Solomon and turbo codes), the R&S AEM100 creates this protection and generates the required robust transport stream, which is output via a standard asynchronous serial interface (ASI) or via Ethernet. Because the Ethernet interface allows network operators to utilize a conventional IP infrastructure for signal distribution, no additional costs are incurred.
The AEM100 includes all of the required functions for ATSC Mobile DTV, the company says. “ATSC network operators can upgrade their equipment to this new standard quickly and easily by inserting the multiplexer into the existing system between ATSC headend and transmitter.” The customer’s ATSC headend and its components do not have to be replaced.
The R&S AEM100 comes with the SFN function already integrated. This function, which can be optionally activated, makes it possible to simultaneously supply the ATSC Mobile DTV transport stream from the multiplexer to several transmitters. This allows simultaneous transmission on the same frequency in SFNs. The advantages for network operators are obvious: They can increase the range and cover more viewers without having to apply for additional frequencies.
The complete ATSC Mobile DTV functionality can be configured, controlled and monitored using a Web browser locally or remotely. All commands for automatic monitoring and for the instrument settings are available over an SNMP interface.
The R&S AEM100 multiplexer for ATSC Mobile DTV, consisting of the R&S AEM100BU base unit and the R&S AEM100I IP encapsulator, is now available from Rohde & Schwarz.
Rohde & Schwarz offers all the required components for a complete ATSC Mobile DTV system: In addition to the new R&S AEM100 multiplexer, the R&S AVE264 encoder for coding the audio/video data stream and the R&S AVP264 multiplex manager, which uses statistical methods for better utilization of channel capacity, are also available. As a result, up to 40 percent more programs can be transmitted, Rohde & Schwarz says.