Comparisons of GNSS Solutions
The following table provides a comparison between two Keysight GPS signal creation solutions:
- Option 409 GPS personality and Option 422 scenario generator for the E4438C ESG and E8267D PSG vector signal generators.
- N7609B Signal Studio for Global Navigation Satellite Systems (GNSS) application for the N5172B EXG or N5182B X-Series signal generators or the N5106A PXB baseband generator and channel emulator. (Table applies to software version 1.4 or later.)
| Feature | Option 409 GPS Personality with Option 422 Scenario Generator | N7609B Signal Studio for GNSS |
|---|---|---|
| Real-time GPS signal simulation | Yes | Yes (Option PFP) |
| Real-time GLONASS signal simulation | No | Yes (Option SFP) |
| Real-time Galileo signal simulation | No | Yes (Option UFP) |
| Real-time Beidou signal simulation | No | Yes (Option WFP) |
| Real-time SBAS/QZSS | No | Yes (Option XFP) |
| Support receiver tests for time to first fix (TTFF), accuracy, and sensitivity | Yes | Yes |
| Maximum number of line-of-sight satellites (per constellation) | 8 | 15 |
| Maximum number of channels (including multipath) | 8 |
40 for GPS, GLONASS, and/or Beidou 16 for Galileo |
| Multipath signals in scenario file | No | Yes |
| Add multipath signals in real-time | No | Yes |
| Real-time power and visibility control of individual satellites | No | Yes |
| Real-time satellites sky-view, power view and trajectory view | No | Yes |
| Ionospheric and tropospheric effects | Fixed models for WCDMA and cdma2000® (Option 422) | Yes, user-defined parameters |
| Moving receiver scenarios | Yes (Option 422) | Yes |
| Custom scenario generation and editing for GPS | Yes (Option 422) | Yes |
| Custom scenario generation and editing for GLONASS, Galileo, or Beidou | No | Yes |
| Real-time scenario generation | No | Yes |
| Maximum signal playback time | 24 hours (limited by length of scenario file) | 24 hours with scenario file, 7 days or longer with continuous scenario generation1 |
| Antenna mask model | Static scenarios only (Option 422) | Static and dynamic scenarios |
| Edit leap second data | No | Yes |
| Trajectory generator to create GGA format files for dynamic scenario generation | No | Yes |
| Add calibrated AWGN | No | Yes (requires AWGN option in instrument) |
| Add real-time CW interference signal | No | Yes (Option NFP) |
| Create or playback single and multi-satellite waveform file | No | Yes (Option EFP)2, 3 |
| A-GPS testing | Combine with 8960 in GS-9000 Lite bench-top system | Combine with 8960 in GS-9000 pre-conformance test system |
1 With continuous (real-time) scenario generation, accuracy will degrade as the simulated time gets farther from the date/time of the almanac and ephemeris files.
2 N7609B-EFP for the creation and playback of single-satellite waveform files is also supported on the E4438C ESG, N5182A MXG, E8267D PSG, E6607 EXT, E6630A, E6640A EXM and M9381A PXIe VSG.
3 N7609B-EFP also supports multi-satellite waveforms creation and playback on N5172B EXG, N5182B MXG-B, E6607 EXT, E6630A or E6640A EXM wireless test set, M9381A PXIe VSG. Memory at least 256 MSa is needed for location fix waveform file.