Chapter 3
System Settings Screens
System Settings Screens
Rev. 001
CX300 ComXpert Operation Manual
22130634
3 - 20
February, 2022
The CX300 supports the following clock source selections.
3.1.14 GNSS Screen
Global Navigation Satellite System (GNSS) refers to a constellation of satellites that
transmit positioning and timing data to GNSS receivers; the GNSS receivers use the data
to determine location and time settings. The
GNSS screen
is used to configure the CX300
GNSS settings to use satellites to determine location, or to use GNSS as a frequency and
clock source.
Table 3-13 Clock Source Selections
Internal
No
Display
When
Internal
is selected, the CX300 uses the test set’s 10 MHz internal
clock as the timing source.
External - 10 MHz
When
External - 10 MHz
is selected, the CX300 uses an external 10 MHz
frequency reference as the test set’s timing source.
External - 13 MHz
When
External - 13 MHz
is selected, the CX300 uses an external 13 MHz
frequency reference as the test set’s timing source.
External - 15 MHz
When
External - 15 MHz
is selected, the CX300 uses an external 15 MHz
frequency reference as the test set’s timing source.
GPS
When
GPS
is selected, the CX300 uses a GPS signal as the test set’s
frequency and timing source.
GPS connectivity must be configured before this selection can be used as a
clock source.
Auto Select
When
Auto Select
is selected, the clock source is selected by the system.
•
No external source detected: the system uses the internal reference.
•
External source detected: the system uses the external reference and
auto-adjusts based on the frequency detected (i.e., 10, 13, or 15 MHz).
GNSS Button