Spectracom GSG-5 series, User Manual With Scpi Manual

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3.
The following generic commands are supported (to display this list in the console win
dow, type
list
.):
clh
– clear commands history
cls
– clear console screen
connect
<resource
1
> – connect to a specific GSG unit
disconnect
– disconnect from currently connected device
list
– print the list of available commands
loop
<interval> <SCPI command> – execute specific command in a loop with
specific interval in milliseconds between repetition
query
<SCPI command> – send SCPI command to connected device and read
response string of connected device
read
– read the response string of connected device
write
<SCPI command> – send SCPI command to the connected device
GSG has en error queue that can be checked automatically after every execution of a com
mand. To enable or disable this function, click .
To clear the console screen, click .
4.9.8 Creating a Trajectory in StudioView
What is a Trajectory?
In the context of GNSS testing, a trajectory is the predefined path a receiver is traveling during
the execution of a scenario. It is the input to the scenario that defines how the virtual vehicle will
move in up to 6 degrees of freedom during the test (X, Y, Z; pitch, roll, yaw).
While the definition of the vehicle path itself is an important constituent of any scenario, the
GNSS signal reception at any given time during scenario execution is of equal importance,
since the reception will be affected by these trajectory-dependent factors:
The environment along the trajectory changes: Infrastructure blockages such as tall build
ings ("urban canyons") or other topographic characteristics will cause the signal recep
tion to vary.
The attitude of the vehicle in motion can affect signal reception due to on-vehicle block
ages and antenna affects.
The acceleration/jerk in the context of position and attitude can have a significant effect
on signal reception.
1
A resource string (e.g., "TCPIP::10.32.1.203::inst0::INSTR") can point to a USB or GPIB connection. It is generated
automatically when you add a new connection and its IP address becomes validated.
4.9 Studioview Tasks
CHAPTER
4
•
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