Descripción

GNSS test system
Key Facts
  • Conducted GNSS receiver resilience testing of satellite GNSS (GPS, GLONASS, BeiDou, Galileo, EGNOS, L1, L2, L5) location technologies
  • One stop shopping with turnkey solution out of one hand
  • Saving CAPEX through re-usability of the same HW with other application such as R&S®TS8997, R&S®TS-LBS
  • Full coverage of EN303413 (Adjacent Frequency selectivity and Spurious Emission)
  • Automation of NMEA capable devices
  • Automation of Android devices
  • Size scalable and portable design
  • Easy to use GUI
  • Automated with path loss compensation routine
  • Re-usable for other RED tests such as EN300328/EN301893
  • Extendable to radiated testing
  • Generation of automated test reports
  • Using highly accurate R&S®Signal Generator and R&S®Spectrum Analyzer

Brief Description What is different when testing GNSS receivers? Currently, the bands adjacent to GNSS frequencies are not used by high-power signals, and there exists no legislation on the receiver performance. Therefore, many low-cost GNSS receivers are highly susceptible to interference. This prevents the regulatory authorities from assigning these bands to new services, like mobile broadband services, which contradicts the goal of efficient spectrum usage. To achieve the goal of increased spectral efficiency, the European Commission agreed on a directive (RED 2014/53/EU Article 3.2.), which requires all GNSS receivers to guarantee a certain resilience against (legal) interference from neighbor bands. When active, this directive requires all classes of GNSS receivers (navigation devices, mobiles, GPS based watches, high-end measurement instruments, any other devices using GNSS, etc.) to be certified and fulfill this requirement in accordance to ETSI EN303413. To obtain the CE mark all receivers sold in European Union that were newly designed or modified after June 13th 2017 have to ensure that they fulfill this directive. GNSS receiver manufacturers can self-certify compliance of their GNSS receivers or test it at a notified body (validated test houses). The R&S®GNSS-RxT test system is a scalable and re-usable solution ready to address the diversified market of GNSS receiver testing. No matter what the device under test is, it?s all about preferable conducted GNSS receiver spurious and adjacent frequency band selectivity testing.
Features & Benefits
  • User-friendly R&S®GNSS-RxT GUI The test cases can be easily executed and parametrized via the well-known R&S®CMWrun GUI. Integrated automation in the R&S®CMWrun GUI speeds up the test time and provides comfortable handling. This R&S®CMWrun GUI is as well used for other applications such as eCall and ERA GLONASS.
  • Testing GNSS receiver spurious emission Like any other electronic device, flaws in the design might lead to spurious emissions from local oscillators or clocks. To rule out potential harm for other devices, EN303413 mandates to analyze the spectrum from 30 MHz to 8.3 GHz, similar to the requirements for 2.4 GHz ISM Band, which are covered in EN300328.
  • Testing GNSS receiver adjacent frequency band selectivity Following fully automated and reliable measurements are performed with R&S®GNSS-RxT:
    • C/N0 without interferer in adjacent band vs. C/N0 with interferer in adjacent band
    • Interferer signal is a 1 MHz windowed White Gaussian Noise signal
    • Closest frequencies are: 1554 MHz and 1615 MHz, both at -105 dBm
    • Highest interferer power is -65 dBm at 1524 MHz
    • Covers L2 and L5 as well, GPS, GLO, BDS, GAL, SBAS, if supported by receiver
  • Required Equipment
    • R&S®FSV Spectrum Analyzer (already used in R&S®TS8997 WLAN test system)
    • R&S®SMW (Dual-channel Vector Signal Generator) (compatible with R&S®TS8997 WLAN test system)
    • PC running test cases
    • Cabling Set
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