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Gemini TM

Gemini TM. Drive-test tool for digital radio networks. Gemini is trade mark of Radio Systems Information Ltd. Key Features. Measurement of speech quality to ITU-T Rec. P.862 Compatible with TETRA radio terminals Motorola MTM700 Sepura SRP2000 Cleartone

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Gemini TM

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  1. GeminiTM Drive-test tool for digital radio networks Gemini is trade mark of Radio Systems Information Ltd

  2. Key Features • Measurement of speech quality to ITU-T Rec. P.862 • Compatible with TETRA radio terminals • Motorola MTM700 • Sepura SRP2000 • Cleartone • Survey using up to 4 radios simultaneously • Expandable design for large networks • Very powerful built-in analysis functions

  3. How does GeminiTM 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

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

  5. Colour indicates audio quality

  6. Colour indicates Base Station

  7. Colour indicates Signal Strength

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

  9. 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

  10. GeminiTM Antenna Combiner • Connect up to 4 TETRA radios to a single antenna in a survey vehicle • Meets all ETSI interference requirements

  11. GeminiTM Applications • Network acceptance • Investigating problems • Benchmarking network performance • Annual performance checks • Objective measurements for contractual negotiations

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