Config; Digital Cellular Phones; Overview - Leica GPS1200+ Technical Reference Manual

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Technologies

Config...\Interfaces... - Controlling Devices

For digital cellular phones, information such as

the reference stations that can be contacted

the phone numbers of the reference stations and

the type of protocol to be used

can be defined.

Changing the reference station to be dialled is of interest in two cases.

Two real-time reference stations, each equipped with a digital cellular phone,

are set up at two locations belonging to different network providers.

When leaving the area of one reference, the station can be changed and the

other reference can be called.

Set up as in case 1.

Two separate fixes from each reference for each point can be obtained,

providing redundancy for future least squares adjustment operations.

Code Division Multiple Access is a high speed data transmission for very

effective and flexible use of available ressources such as band width. Users

of a cellular phone network occupy the same frequency band. The signal is

especially coded for each user.