Spectracom GSG-5 series, Руководство пользователя с руководством по SCPI

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GNSS systems currently supported are: GPS, Glonass, Galileo, BeiDou, and QZSS, and
their corresponding signal types. For information on signal types , see also "Frequency
Bands and Signal De-/Activation" on page 71.
Pseudo-encryption (P(Y)): For more information, see "Encryption" on page 76.
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 77 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 signals.
Sweep or Noise : In addition to the modulated signals, sweeping interference or
narrowband noise interference will be transmitted. Currently it is not possible 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 nominal fre
quency. With GSG-6 series simulators, it is possible to generate carrier signals
for L1 and L2 at the same time.
Prn : Pseudo-random noise
3.6.2.2 Satellite ID
The
Satellite ID
field is used to specify the GPS PRN, Galileo PRN, and the GLONASS satellite
ID, therefore it is limited to 24 (the highest GLONASS satellite ID). If this field is set to a value
higher than 24, then GLONASS will not be selectable under Configure signal types .
3.6.2.3 Transmit Power
The term Transmit Power refers to the signal power transmitted by GSG during the execution of
a scenario.
3.6 "Options" Menu
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