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Figure 3-29:
Signal types configuration view
Combining signals from different GNSS systems
If your GSG unit is licensed for multiple channel operation, in Signal Generator mode it is
not only possible to choose between multiple frequency bands and codes, but also to sim-
ulate several GNSS signals, e.g., both GPS and GLONASS, at the same time. This can be
achieved by enabling several GNSS systems from the
Configure signal types menu.
In Signal Generator mode, GSG offers the following Signal type configuration options:
GNSS systems currently supported are: GPS, Glonass, Galileo, BeiDou, and QZSS,
and their corresponding signal types. For information on signal types , see also "Fre-
quency Bands and Signal De-/Activation" on page 76 .
Pseudo-encryption (P(Y)): For more information, see "Encryption" on page 81 .
SBAS Signals : It is possible to generate a signal for any of the SBAS PRNs. However,
GSG can generate a real SBAS message stream only if the chosen PRN corresponds
to a live SBAS satellite (see
"SBAS Satellites" on page 82 for further details).
Note: The SBAS signal type is only available with GSG-55, GSG-56,
and GSG-6 Series units.
Note that in signal generator mode (unlike in constellation simulation mode), GSG
will always attempt to download SBAS data. If such data is not available, then MT63
(i.e., “null messages”) will be transmitted.
Modulation options:
Modulated : This is the default mode, transmitting standard, modulated sig-
nals.
Sweep or Noise : In addition to the modulated signals, sweeping interference
or narrowband noise interference will be transmitted. Currently it is not pos-
sible to use sweep/noise with unmodulated signals.
Pure Carrier Signal : GSG will transmit an un-modulated signal (pure carrier),
using the user-specified signal strength, and frequency offset from the
3.6 "Options" Menu
User Manual GSG-5/6 Series Rev. 27 95