SEL-MDX2

The Selenio SEL-MDX2 multiplexer is capable of accepting unencrypted programs from a variety of sources — from local encoders to network interfaces, including ASI or Gigabit Ethernet. It includes a Simulcrypt synchronizer to request information from a conditional access system over a dedicated Ethernet connection. Each program is encrypted using DVB common scrambling, and Entitlement Control Messages (ECM) are multiplexed into each stream to provide a DVB-compliant output.

The encryption engine supports 240 user-accessible simultaneous programs at a combined rate of up to 214 Mb/s. When not using encryption, the multiplexer supports up to an 800 Mb/s throughput.

External connections can include up to eight software-selectable independent inputs or outputs that can handle either DVB-ASI or the SMPTE 310M protocols.

DVB-T2 Gateway Functionality
The Selenio SEL-MDX2 multiplexer can be upgraded to serve as a DVB-T2 Gateway. The Harris T2 Gateway is an integral part of the company’s overall DVB-T2 broadcasting solution. The DVB-T2 Gateway encapsulates DVB/MPEG-TS into Physical Layer Pipes (PLP), authors in-band channel signaling, and orchestrates DVB-T2 transmitters with both Single Frequency Networking (SFN) time synchronization and transmitter control.

The Harris T2 Gateway is integrated with the service multiplexors on a single module providing up to 8 PLPs.

In-band control and signaling is automatically authored based on validated modulation parameters entered through the intuitive web-based GUI.

SFN network synchronization is achieved by highly accurate and deterministic timestamps which can be generated by the gateway's internal GPS receiver. All of this is then encapsulated into a T2-MI MPEG-TS stream for distribution to DVB-T2 modulators such as the Harris Maxiva products.

DVB-T2 offers many advantages over a traditional DVB-T broadcasting solution in terms of both channel robustness of the waveform and overall user throughput. Effective user throughput is a function of implementation choices in the gateway, and not all gateways are engineered to be equal. Harris has designed our T2 Gateway to help maximize user throughput.

Back Module Connectivity
The SEL-MDX1 mux/demux application module offers two choices for back module external connectivity ― one with HD-BNC electrical connections for eight input or output ASI signals and one with HD-BNC electrical connections for five input or output ASI signals, and RJ-45 100Base-T connectivity to support conditional access.

SDI and ASI interfaces utilize a Belden-type 1505A, 1694A or 1695A cable with HD-BNC connectors. A cable removal tool is provided for these types of HD-BNC connections.