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Gemini TETRA drive-test tool Gemini is a trademark of Radio Systems Information Ltd, www.rsi-uk.com.

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Presentation on theme: "Gemini TETRA drive-test tool Gemini is a trademark of Radio Systems Information Ltd, www.rsi-uk.com."— Presentation transcript:

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2 Gemini TETRA drive-test tool Gemini is a trademark of Radio Systems Information Ltd,

3 Key Features Independent and objective TETRA network performance measurement tool Measurement of speech quality to ITU-T Rec. P.862 Use for network acceptance & ongoing performance Compatible with TETRA radio terminals –Motorola MTM800E –Sepura handportable & vehicle –Cleartone Survey using up to 4 radios simultaneously Scalable design: from walk-testing to multiple vehicles Powerful built-in analysis functions

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5 How does Gemini work? continuously makes calls between mobile and fixed parts of Gemini call failures logged call setup time logged speech samples sent on uplink & downlink to test speech quality

6 Master in Survey Vehicle Slave in Office TETRA Gemini Schematic GPS

7 Analysing Results Results displayed as icons on maps –original quality –very poor TETRA quality –poor TETRA quality –standard TETRA quality Following examples show different types of analysis on maps Speech quality measured as Mean Opinion Score

8 Colour indicates audio quality

9 Colour indicates Base Station

10 Colour indicates Signal Strength

11 Poor Coverage Area Lots of handovers, No Service and Call Drops Good Coverage Area All calls completed OK

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13 Analysing Results Results displayed on Graphs - almost any parameter can be displayed against any other parameter Following examples show different types of analysis on graphs

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18 Connect up to 4 TETRA radios to a single antenna in a survey vehicle Meets all ETSI interference requirements Gemini Antenna Combiner

19 Gemini Applications Network acceptance Investigating problems Benchmarking network performance Annual performance checks Objective measurements for contractual negotiations


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