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The VB273 Satellite redndancy solution provides full dual path redundancy for satellite signals with autonomous operation and deep signal analysis on both signal paths for the ultimate switching decision making.




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  • 2:1 redundancy switching functionality based on built-in monitoring of incoming satellite signals
  • Monitoring feature set of VB120 included making this a switch and a probe combined into one
  • Supports 70/140MHz IF (VB273) and 950-2150MHz L-band (VB273-LBAND)
  • Robust bistable RF relays ensures state is preserved even in the event of a power loss
  • Capable of receiving DVB-S/S2 QPSK, DVB-S2 8PSK, DVB-S2 16APSK, DVB-S2 32APSK
  • Possibility to customise alarming and switching template on all parameters
  • PID analysis, Service analysis, bandwidth overview, PSI/SI/PSIP table analysis
  • PSIP support (ATSCA/78)
  • Automatic or manual TS recording of up to 200MB for recording fault that triggered redundancy switch

The VB273 has multiple layers of redundancy. The 1RU chassis offers dual redundant power supplies and the VB273 switching card has magnetically latching relays to protect against signal disruption even during a complete loss of power.

The VB273 switch module actively taps off a small portion of the input signal from both inputs, converts it to L-band if required, amplifies it and then feeds it to the neighbouring VB272 DVB-S/S2 input module via two factory fitted loop cables. This allows monitoring and analysis to take place on both inputs simultaneously.

If any problem in any parameter is detected preset rules apply and the unit will check the opposite input for the same failure and perform a switch if no failure is detected. To avoid switch flapping a minimum switchback time can optionally be configured. All the parameters in the implementation of the TS 101 290 specification can be utilised as switching criteria. In automatic mode the VB273 system is fully independent and makes its own switching decisions based on the preset switching rules. In manual mode the unit can be controlled from any overlying NMS system via the extensive XML-based Eii (External Integration Interface) or via SNMP triggers.

The VB273 also features a unique superLocal mode feature to deliberately cut off overlying NMS control for emergency manual override situations via the front button panel. All parameters can be controlled via the built-in web GUI. The web GUI also gives a visual overview of parameters used in switch decisions and system status.

The VB120 blade offers a bonus ASI input port with TS 101 290 analysis support that can be used for ad-hoc monitoring in addition to the two main ASI input ports used on the VB242 blade should the need arise.

The hardware is custom designed and built to telco-grade standards for maximum reliability and minimum maintenance. The complete redundancy solution consumes less than 25W of power. This drastically cuts on power consumption and air conditioning needs in installations.

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