Spectracom GSG-5 series, User Manual With Scpi Manual

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USB[board]::manufacturer ID::model code::serial num-
ber[::USB interface number][::INSTR]
GPIB[board]::primary address[::GPIB secondary
address][::INSTR]
For more information about the VISA address, please see:
http://zone.ni.com/reference/en- XX/help/371361N- 01/lvinstio/visa_ map_
address/
iv.
The signal‐to‐noise ratio (SNR) is used to compare the level of a desired signal to the
level of background noise. The SNR is expressed in decibels (dB) and is used to
describe the GNSS signal strength in NMEA‐0183 GSV sentences.
v.
On the GSG unit, signal strength is specified in dBm, i.e. the power ratio in decibels of
the measured power referenced to one milliwatt (mW). Since dB cannot be directly con
verted into dBm, the Record and Playback program relies on a decibel offset value. This
offset value maps the NMEA signal strength (in dB) to the GSG signal strength (in dBm).
An offset value of [‐160] is recommended to begin with. This value can be adjusted up
or down until the offset is satisfactory.
vi.
You must also specify any scenario options that cannot be extracted from NMEA sen
tences. These options include signal type, antenna model, troposphere model, tem
perature, pressure, humidity, and elevation mask. For more information, see under
""Select" Menu" on page 36.
vii.
The input file name specifies the NMEA‐0183 file to parse. This file should only contain
NMEA‐0183 GGA, RMC, and GSV sentences.
viii.
The output file name specifies the name of the scenario as it will appear on the GSG
unit. Do not include a file extension. The Record and Playback program outputs scen
ario, trajectory, and event files. It will automatically append the correct file extension for
each output file. By default, the output files will be generated and saved in the same dir
ectory as the input file.
4.9.14.4 Recording Data with StudioView
StudioView's Data Recorder allows to obtain all required data automatically without the need
to execute SCPI commands. The Data Recorder generates NMEA data from the trajectory cur
rently being played on the GSG unit, collecting RINEX navigation and observation data,
recording RSG parameters, satellites information and navigation messages.
How can the recorded data be retrieved?
The data can be retrieved either by using the GSG Web Interface, or via SCPI commands, or
by using Studioview.
Using the StudioView Data Recorder for the First Time
To open the Data Recorder, navigate to Tools > Data Recorder , or click :
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User Manual GSG-5/6 Series Rev. 26
4.9 Studioview Tasks