SFN Synchronizers

---

Nowadays, consumers request for high-level quality of services and particularly when watching TV content. This mandates that broadcast and network operators guarantee the delivery of TV signal.

Single Frequency Network (SFN) for DVB-T and DVB-H networks is designed to broadcast the same content over the same frequency, enabling spectrum, bandwidth and network coverage optimization. The challenge in a Single Frequency Network is that transmitters shall deliver this content at the very same time.

Knowing that a single de-synchronization or wrong SFN signaling can disturb transmission and cause a complete TV black-out, operators tend to secure their SFN distribution link to meet consumers strong requirements. From the head-end toward each transmitter, operators implement double network paths (satellite, microwave, ...) to cope with one network failure. The challenge is that networks have different propagation delay.

ENENSYS' SynFoNizer^TM is cost-effective product designed to synchronize redundant SFN feeds and to perform a seamless switch-over between both distribution networks.

Key features

High-grade SynFoNizer Based on ENENSYS SFN expertise Unique and patented solution Resynchronizing SFN feeds Seamless switch-over	Several switching modes Automatic without network priority Automatic with network priority Manual network selection
Flexible switching conditions User-defined switching conditions ETR 290 L1, L2, L3 based SFN error conditions Switching conditions can be different per multiplex	Outstanding passthru mechanisms Maintain service continuity in case of breakdown or power failure Passive bypass : all inputs are broadcast as such Advanced bypass (SynFoGuard) : the last selected network is maintained when powers down
Monitoring and supervision Full SNMPv2 compliant Possibility to trigger traps upon customized events Dry relay alarms for local failover management Easy-to-use web-based Graphical User Interface Real-time monitoring of each network path Straight integration into any NMS