Übersicht
Es gibt zahlreiche Situationen, in denen Netzwerkbetreiber ihre Netzwerkleistung überprüfen müssen. Libra™ misst die Signalstärke in einem ganzen Bereich. Diese Daten können anschließend mit dem Plan verglichen werden.

Libra(TM)

How does Libra™ work? Libra™ uses the concept of the sample gap to produce statistically valid and repeatable measurements. Over a given distance (commonly 50m) Libra™ logs all signal samples from the receiver and at the end of the distance calculates the % confidence levels from the raw data.

The software judges the distance travelled 20 times per second using a technique of estimation and interpolation - this allows a measurement of sample gap distance derived from GPS accurate to better than 1m (even using standard GPS).

The fast sampling rate of the receiver ensures repeatable results, even when surveying more than one frequency.

What information does Libra™ provide?  Survey data can be presented as maps or graphs or exported in standard file formats for further analysis. Maps can be displayed on bitmap backgrounds or as a scale preview suitable for printing and physically overlaying on paper maps. The map projection is configurable for all standard mapping systems allowing world-wide use of Libra.

One of the fundamental principles of Libra™operation is the use of site names rather than frequencies to identify sets of survey data. The real benefit of this comes during the analysis when complete sets of data for each site can be included or excluded from the analysis without having to worry about the actual survey frequency. Maps may show either coverage of a single site or composite coverage from any combination of sites allowing powerful "what if" analysis of the survey data. In addition, signal values for individual sites may be adjusted to show what additional transmit power is needed to fill in coverage.

Statistical analysis of the survey data allows objective measurements of coverage for proving system design. Data may be exported in a number of different formats suitable for correlation with prediction tools.

Libra™ is a trademark of Radio Systems Information