![Spectracom GSG-5 series Скачать руководство пользователя страница 256](http://html1.mh-extra.com/html/spectracom/gsg-5-series/gsg-5-series_user-manual-with-scpi-manual_1343630256.webp)
The syntax to be used while GSG is not generating any RF allows to omit the
signal_
mode_letter
parameter and instead specify only the
gnss_letter
parameter fol
lowed by an integer. In such case, a modulated signal mode is assumed.
The
integer
parameter:
If the signal mode is modulated or PRN, the parameter <
integer
> must be a valid
satellite id number.
For an unmodulated GPS, Galileo, BeiDou, QZSS, or IRNSS signal, the parameter
<
integer
> must not be specified. For an unmodulated GLONASS signal the
<
integer
> parameter specifies the frequency slot [–7 … 6].
Additionally, as of firmware version 7.0.1, it is possible to specify only the signal mode and
satellite id. All signals that have been enabled by the
source:onechn:signaltype
com
mand (or via the front panel) and are compatible to the specified signal mode and satellite id
remain set. Incompatible signals are automatically disabled. This syntax is designed to be used
together with the ‘
source:onechn:signaltype
’ command, so that you can first specify
the signal mode and satellite ID using the ‘
source:onechn:satid
’ command and later
specify particular signals with the ‘
source:onechn:signaltype
’ command.
When GLONASS signals are selected along with the modulated mode, the GLONASS fre
quency slot is determined by the satellite id from the navigation data (specified either using the
SOURce:ONECHN:EPHemeris
command or from the Ephemeris field in the front panel
interface).
For the PRN mode, the frequency slot for GLONASS is determined automatically by a pre
defined mapping of satellite id to frequency slot.
While the GSG unit is generating RF it is possible to change the signal mode using the reduced
command syntax specifying only the desired signal mode. Note that currently it is only possible
to change the signal mode to any mode that is ‘lower’ or equal to the initial signal mode used
when the signal generator was started. For example, if the signal generator is started in PRN
mode it is possible to switch to unmodulated mode and back to PRN mode, but not to mod
ulated mode. If started in modulated mode it is possible to switch between all three signal
modes. The signal mode cannot be changed if the signal generator started in unmodulated
mode.
Examples (used when the unit is not generating RF)
Set modulated GPS signal with id11:
SEND:
SOURce:ONECHN:SATid G11
Set unmodulated GLONASS signal with frequency slot -5:
SEND:
SOURce:ONECHN:SATid UR-5
240
CHAPTER
6
•
User Manual GSG-5/6 Series
Rev.
26
6.3 Command Reference
Содержание GSG-5 series
Страница 2: ......
Страница 4: ...Blank page II User Manual GSG 5 6 Series...
Страница 116: ...BLANK PAGE 3 6 Options Menu 100 CHAPTER 3 User Manual GSG 5 6 Series Rev 26...
Страница 182: ...BLANK PAGE 4 9 Studioview Tasks 166 CHAPTER 4 User Manual GSG 5 6 Series Rev 26...
Страница 368: ...BLANK PAGE 6 7 Revision History SCPI Guide 352 CHAPTER 6 User Manual GSG 5 6 Series Rev 26...
Страница 374: ...BLANK PAGE vi User Manual GSG 5 6 Series...