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|VB252: DVB-T/T2 TERRESTRIAL RF INPUT MODULE
VB252 is a dual input DVB-T/T2 input interface module that enables monitoring of digital terrestrial transmissions. Two modules may be housed in a 1RU chassis together with a controlling VB120 or VB220 probe, providing high monitoring capacity occupying a minimum of rack space.
Figure - The 1RU Enhanced Chassis populated with one VB120 module controlling two VB252 DVB-T/T2 input modules
giving a total of 4 independent RF inputs.
In addition to monitoring typical RF parameters, the monitoring solution optionally allows advanced analysis of the complex DVB-T MI protocol; signal integrity is verified layer by layer. The VB252 also support the T2 Lite standard with full analysis of T2 Lite transmissions. All this analysis functionality is complemented by the renowned Bridge Technologies ETSI TR 101 290 monitoring engine to ensure standards conformance at all levels.
Similarly the VB252 can be used with a VB242 ASI input module, enabling high density ASI and DVB-T/T2 monitoring.
The basic VB252 supports one COFDM RF input. The second input of the VB252 can be enabled by the customer via a software licencing option. This flexibility allows probe capacity to be tailored to individual system needs, and increase as a monitoring system is expanded to include more transport streams.
The Advanced RF Option adds impulse response graphing and analysis to the VB252, making it possible to check reflection conditions at the probe location. Configurable threshold limits determine when an alarm should be raised due to reflection changes in time or power.
Impulse response analysis results are presented as a user-friendly graphical GUI, facilitating reflection measurement interpretation. Licence upgrades are performed by entering a licence key in the regular probe GUI and they can therefore be done remotely.
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