654 Keysight N9927-90001 User’s Guide
System Settings
System Configuration
Saving Data with GPS Enabled
GPS position and clock data are included when data is saved with the following
files types: *.csv, *.SnP, State, State+Trace data save.
A warning is shown if the GPS is ON but unlocked at time of save, or if the GPS
feature is ON but no GPS is physically present at time of save.
The following is a sample S1P file with GPS information:
!GPS Latitude: 38 28.87717 N
!GPS Longitude: 122 42.66625 W
!GPS TimeStamp: 06/25/2010 16:24:48
!GPS Seconds Since Last Read: 2s
Saving GPS Display Data
To save the current GPS data displayed:
—Press Save/Recall 9
—Then Save File Picture (PNG)
— A menu opens to enable naming the file you are saving (*.png).
GNSS and GPS Freq Ref Source Settings
For convenience, the GNSS Settings menu includes the Freq Ref Source
softkey.
—Press System
> System Configuration > GNSS (GPS+) > Freq Ref Source
[GPS] then
— Choose one of the following:
— Int
, Ext, or GPS
For more, on the Freq Ref Source softkey choices, refer to “Frequency
Reference Source” on page 654.
Frequency Reference Source
The FieldFox internal frequency reference source is used to make accurate and
stable measurements. To improve measurement accuracy and stability, you
can use a highly-stable external 10 MHz reference source or a precision timing
signal provided with Built-in GPS (Opt. 307).
The Frequency Reference setting will survive a Factory Preset or Mode Preset
and is saved as part of the Instrument State. When resuming after Standby, the
FieldFox will display an Unlock message while it acquires a lock to an external
or GPS source.
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