Frequency Reference Source - Agilent Technologies N9913A User Manual


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: 2

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 FieldFox or Mode Preset and is
saved as part of the Instrument State. When resuming after Stand By, the
FieldFox will display an Unlock message while it acquires a lock to an external or
GPS source.
How to select Frequency Reference Source
 Press System 7
 Then
 Then
 Then
 Then choose from the following:
System Settings
Choose from:
Elevation Unit
(Meters)
m
o
Feet
o
System Configuration
Frequency Ref
Freq Ref Source
Internal frequency reference
Int
o
External frequency reference. Connect the 10 MHz External Reference to
Ext
o
the Ref In/Trig In SMA (f) connector on the FieldFox top panel. The
FieldFox may take up to 10 seconds to lock to a valid External Reference
source.
GPS Available ONLY with Built-in GPS (Opt. 307). When selected, the
o
internal GPS is immediately enabled and a search for satellites begins. When
satellites are found, the precision timing signal is NOT used directly, but is
used to correct the absolute frequency of the internal reference many times
per second.
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