GSG Series GPS/GNSS Simulators (2023)

GSG Series GPS/GNSS Simulators

GSG Series GPS/GNSS Simulators (1)

Overview GPS simulator

Our GPS/GNSS satellite simulators are easy-to-use, scenario-based instruments that combine a powerful, feature-rich platform with industry-leading value and accessibility for all GPS testing requirements.

The Spectracom GSG Series simulators generate the same RF signals emitted by navigation satellites to test any device or system with a GPS receiver. Several configurations are available, but all can be upgraded to add capabilities as your GPS testing needs grow.

Advantages of GSG Series Simulators

  • Powerful and accurate
  • Lowest cost of ownership
  • Easy to configure
  • Easy to use
  • Easy to connect
  • Lagan and portable

Rich in features

  • All available constellations: GPS, GLONASS, Galileo, BeiDou, QZSS, IRNSS
  • 1-64 channels (used for satellites, interference, multipath); sync multiple units for more
  • Multiple frequencies: L1, L2, L2C, L5, E1, E5, B1, B2; soon: E6, B3
  • Variable output: -65 to -160 dBm
  • High accuracy of time measurement

Check out our application packages for special testing requirements and tell us what else you need

Simple scenario-based testing

  • Test each condition using built-in or user-defined scenarios
  • Define trajectories: Via Google, in real time from streaming data, from recorded data and more
  • GSG StudioView Windows software makes creating, editing and managing scenarios easy
  • Test various GPS signal disturbances including multipath, interference, jamming, spoofing, atmospheric effects and more

Unprecedented convenience

  • Easy to set up and operate
  • Compact and lightweight (~3 kg / 6 lbs)
  • Independent control (front panel) or remote control via USB, Ethernet, GPIB
  • Simply connect an RF cable to your receiver or perform an antenna test with an antenna radiating in an RF shielded environment

Lowest cost of ownership

  • Performance/price standard
  • A modular hardware/software platform protects your investment
  • Buy only the features you need, upgrade when needed; future GNSS signals fully supported

GSG Series GPS/GNSS Simulators (2)

Single Channel GPS/GNSS L1 RF Generator

GSG-51 is a GNSS signal generator that emulates a single satellite signal. The main application is a simple but very fast production test to ensure that the circuit is correct, that the antenna is properly connected and that the receiver can receive and identify the satellite signal. It provides a fast and cost-effective solution for production testing of GNSS receivers in e.g. mobile phones with integrated GNSS receivers. The wide RF level range of –65 to –160 dBm allows the sensitivity of all types of GNSS receivers to be checked with minimal delay. An additional 60 dB of power from common test scenarios allows for multiple signal splits.

Easy to use

GSG-51 users can configure settings without the need for a remote computer and pre-compilation phase. The front panel allows the user to quickly change parameters such as satellite ID, time and output power. The front panel can be locked to prevent accidental shutdown or configuration change. Once started, the device can simulate continuously for 31 days (or indefinitely if the device is connected to the internet).


As the base model of the popular Series 5 GNSS simulator family, this affordable unit can be upgraded at any time after purchase to increase the number of channels, add receiver path control and add advanced features such as SBAS (WAAS, EGNOS, MSAS or GAGAN) , white noise generation or multipath simulation. Some restrictions apply. Your investment is protected because you can buy now and upgrade later if your requirements change.

GSG Series GPS/GNSS Simulators (3)

Visual Channels GPS/GNSS L1 RF Generator

The GSG-5 series is a GPS, GLONASS, Galileo, BeiDou and QZSS constellation simulator that generates all commercial signals in the standard L1 band. It provides a standard set of functions for testing GNSS systems. With a base of four channels, configurable and expandable to 8, 16 or more signals, this configuration is perfect for navigation fix and position testing, in-line product testing or engineering and development.

Easy to use

GSG-5 users can configure scenarios on the fly without the need for a remote computer and pre-compilation phase. The front panel allows the user to quickly change parameters such as user position, time and power. And using StudioView™ software, it's easy to create scenarios through the Google Maps interface.


As the base model of the popular Series 5 GNSS simulator family, this affordable unit can be upgraded at any time after purchase to increase the number of channels, add new GNSS constellations and advanced simulation capabilities. Some restrictions apply. Your investment is protected because you can buy now or upgrade later when your requirements change.

Connectivity increases ease of use and flexibility

The GSG-5 can be controlled via an Ethernet network connection, USB or GPIB. The built-in web interface allows full control of the instrument via the front panel controls. GSG StudioView™ PC software allows you to build, edit and manage the most complex scenarios independent of the unit for later loading.

GSG Series GPS/GNSS Simulators (4)

Multi-channel, multi-frequency GPS/GNSS RF generator

The GSG-6 series family offers multi-band operation, simulation of multiple GNSS constellations and expansion to many more channels. With all the features of the popular Series 5, the Series 6 line expands your ability to simulate all of the new emerging GNSS satellite signals. With a base of 32 channels, expandable to 48, 64 or more, it provides navigation fix and position testing for engineering and development testing. The Series 6 simulator protects your investment by being upgradeable in the future to multiple frequency bands and channels (plug-in hardware upgrade) and multiple signal formats (firmware upgrade).

All the features of the GSG-5 series and more

The GSG-6 series provides multiple channels and GNSS signals on multiple simultaneous frequencies. For example, GSG-6 supports testing of dual-frequency (L1/L2) receivers and military-grade SAASM modules using pseudo P(Y) code with soon-to-be-available M code.

Currently, the GSG-6 series also supports new GPS signals L2C, L5; GLONASS L2; Galileo E5; Beidou B2; and IRNSS L5.

The ideal solution for testing GPS time transmission

In addition to a range of built-in navigation/positioning tests, the GSG-6 is also suitable for testing the accuracy of time receivers. All GSG models feature an ultra-high stability OCXO time base for accurate timing of satellite data or use external synchronization of a 10 MHz reference from a cesium or rubidium clock, for example. The built-in 1 pps output, synchronized with the generated satellite data, allows comparison with the 1 pps signal from the timing receiver under test. And the OPT-TIM option enables a tenfold improvement in time calibration accuracy.

There are 3 hardware configurations of the GSG-6 series

Each configuration adds 16 channels and one more frequency that can be simulated at the same time. You can upgrade models by returning the device to the factory.

  • GSG-62: 32 channels and 2 simultaneous frequencies
  • GSG-63: 48 channels and 3 simultaneous frequencies
  • GSG-64: 64 channels and 4 simultaneous frequencies


  • GPS and L1 are included, and the second frequency and other constellations are ordered from the list of available options.
  • You can order more frequencies than the device can generate at the same time when testing L1+L2 and later testing L1+L5.
  • You do not need to order as many frequencies as the device can generate if you order hardware to generate multiple frequencies and later order frequency options as a firmware upgrade without having to return the device to the factory.

GSG Series GPS/GNSS Simulators (5)

GPS/GNSS Test Scenario Builder software for Windows®

GSG StudioView™ provides an easy way to create, edit and backup complex scenarios for the Spectracom GSG Series multi-channel GPS/GNSS simulators. GSG StudioView allows users to create and manage visual trajectories and supports the import and conversion of trajectory files from other software applications and devices such as Google Earth.

While the ability to manage scenarios without the need for an external computer is an advantage of the GSG simulator, StudioView Windows® software provides the following benefits to the test engineer:

  • Easily create, edit and organize all scenario parameters, including dynamic events
  • Create, edit and visualize paths using mapping tools
  • Convert tracks from CSV, KML, KMZ and GPX files to the required NMEA format
  • Create scenario files (including events and paths) without having to connect to the simulator

Simple route creation and dynamic event management

A key feature of GSG StudioView is the ability to create and customize a moving receiver simulation. Easily create visual routes with Google Maps. Or import tracks from most other software applications and devices such as Google Earth. The software converts a list of waypoints from a CSV file or waypoints, routes and tracks from a GPX (GPS Interchange Format) file to NMEA according to the device requirements. Google KML and KMZ files can be opened, edited and saved. Each waypoint can be specified. When converting a track file to NMEA format, specify the altitude and speed at each waypoint or use a constant value for the track. Route waypoints can be interpolated at a set interval from 100 msec to 1 hour.

Ephemeris and almanac data download

Based on the start time and duration of the scenario, the GSG StudioView software identifies the relevant RINEX files and pre-downloads them from the official websites. Once the scenario has been transferred to the simulator, no further downloads are required.

Simple file management and control

When you're ready to transfer (or download) scenario files to a GSG unit, simply connect via a network, USB or GPIB interface and use the built-in file manager. Drop and drag files, use predefined shortcuts to copy, delete or rename on PC or GPS simulator. Or use the "uploader" to batch upload scenarios or firmware files to multiple units at once. Also included is a "console" function for sending SCPI commands to the connected unit and viewing the response. The software comes standard with multilingual support. English and Russian are currently supported. Please contact us if you want other languages.

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