Orolia GSG-5 Series, User Manual With Scpi Manual, Page: 21 / 392

1.5 Intended Use and Operating Principle
DANGER! If the equipment is used in a manner not specified by the man-
ufacturer, the protection provided by the equipment may be impaired.
Orolia GSG-Series Signal Generators and GNSS Simulators are used to test GNSS receiv-
ers by generating GNSS signals, as they are transmitted by GNSS satellites. The signals are
transmitted via air (using an antenna; see
"Signal Power Level Considerations" on
page 24 ), or via an RF cable.
Depending on the model, and the options installed in a GSG unit, generated/simulated sig-
nals, as well as user position, time and output power can be manipulated by the user either:
during the test, i.e. in real-time, via the GSG front panel, or
before beginning the test, by saving the programmed signal data (as well as tra-
jectory data, if the receiver is to be tested under virtual movement conditions) in
scenario files, using the optional StudioView™ software.
In addition to GNSS, other signals such as interference and multi-path can be generated to
test the sensitivity to various disruptions.
The number of channels installed in a GSG unit determines how many signals can be gen-
erated. If more channels are required than available, two or more GSG units can be syn-
chronized to generate 128, 256, or more signals.
Built-in trajectories (static, configurable circle, and rectangular as defined in 3GPP TS
25.171) or user-designed trajectories (in NMEA standard format) can be run on GSG sim-
ulators. Users can upload their own ephemeris data in standard RINEX format or re-use the
default data for any time periods. The GSG-6 Series is capable of automatically down-
loading historical RINEX, WAAS and EGNOS data from official websites, as needed.
The GSG-6 Series can be controlled via an Ethernet network connection, or USB or GPIB.
A built-in web interface allows remote operation of the instrument. With the optional GSG
StudioView™ PC Software, you can build, edit, and manage the most complex scenarios,
including building trajectories via Google Maps, independent of the GSG unit, for later
upload.
Besides the variety of built-in navigation/positioning tests, GSG units are also suited for
accurate testing of timing GNSS-receivers. The GSG-6 is equipped with an ultra-high-sta-
bility OCXO timebase for precision timing of the satellite data, or use external syn-
chronization from a 10 MHz reference from e.g. a Cesium or Rubidium clock. A built-in
1PPS output, synchronized to the generated satellite data, allows comparison with the
1PPS signal from the timing receiver under test.
1.5 Intended Use and Operating Principle
User Manual GSG-5/6 Series Rev. 27 5