Spectracom GSG-5 series, User Manual With Scpi Manual

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SAIF
L2C
L5
Active Signals
Frequency bands can be turned ON/OFF separately, so as to configure which types of RF sig
nals specific to each supported satellite system shall be active/inactive when a scenario is run
ning.
Depending on the configuration of your GSG unit, all of the frequency bands listed above can
be turned ON/OFF.
To turn ON/OFF a signal band, navigate to: Select > [ Select Scenario ] > Configure Scenario :
View 3/3 > [ Satellite System ]: Enter a number of satellites > 1 (see "Number of Satellites" on
page 71).
The satellite constellation (see "Satellite Constellations" below) must be configured accordingly,
in order to allow for, e.g., the L2C band to be simulated. In other words, if you chose to dis
able satellites that can generate this signal, it will not be generated, even if you activate the sig
nal. Hence, it is recommended to leave all signal types ON (default), thereby letting the
configured satellite type determine which RF signals are active.
Use cases for turning OFF the transmission of individual frequency bands are:
simulating a one-band antenna
reserving the maximum number of channels for other requirements (e.g., L1-only trans
mission)
Considerations:
Altering active RF signals will not alter the navigation message. Hence from a receiver
point of view, choosing to de-active L2 and L5 will mimic the situation of using a single
band (L1) antenna.
Settings are GNSS-specific, not satellite-specific.
For GLONASS, C/A code is always used.
3.5.10.4 Satellite Constellations
Once existing GNSS satellites of a satellite system in orbit are being replaced by new, more
modern satellite types, the satellites are often categorized by their
generation , or historic con
stellation . In the case of the GPS system, these constellations are named by their block numbers,
e.g., "IIA".
3.5 "Select" Menu
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