Gemini - Drive test tool
Gemini is a survey tool that measures radio network performance as perceived by a user, whether it is affected by coverage problems, system overloading or equipment failure.
What is Gemini?
Gemini is a survey tool that measures radio network performance as perceived by a user, whether it is affected by coverage problems, system overloading or equipment failure.
Gemini measures the critical parameters associated with coverage and grade of service and provides sophisticated analysis to display the results as maps, graphs or tables. Standard radio terminals are used so that results truly match what the end-user perceives
Gemini is intended to be used for initial network acceptance testing and then for regular performance checking against Service Level Agreement criteria. Gemini is essentially technology independent akthough it has been developed with the requirements of the TETRA market particularly in mind
Gemini is available in robust carry-case or 19" rack options or, if only using one raido terminal, as a hand-held unit
How does Gemini work?
Gemini consists of two parts, the master in the survey vehicle and the slave at a fixed location with good coverage. Both parts may control up to 4 radios, with each master radio initiating calls to irs corresponding slave radio over the radio network. Calls are made continuously and entirely automatically with attempts being made to re-establish the call should it be lost. Each master-slave pair of radios works independently so that in total, there may be up to 4 simultaneous test calls at any time - useful for comparison of different networks or different radios on the same network or for testing the network under load.
During each test call all the results including any failures are logged together with speech quality measurements of both the uplink and downlink and GPS coordinates.
Post-survey, the slave uplink results are merged and synchronised with the master downlink results toproduce a single database with all data for further analysis. Data from other survey vehicles can also be imported to a single database thereby giving the option for centralised data analysis when using a fleet of survey vehicles
