Chapter 4
Configuring System Settings
Configuring Timing Reference (Clock Source)
Rev. 001
CX300 ComXpert Operation Manual
22130634
4 - 14
February, 2022
4.6 Configuring Timing Reference (Clock Source)
The following sections describe how to arrange the CX300 to configure the timing
reference.
See section 3.1.13, “Clock Source Screen”, on page 3-19
for a description of any of the
settings referenced in this section.
4.6.1 Internal Reference
The following procedure describes how to configure the CX300 to use the test set’s internal
clock as a timing reference:
1.
Navigate to the
Clock Source screen
.
2.
Select
Internal
from the
Clock Source menu
.
The Clock Source Indicator is not displayed when Internal is selected as the clock source.
4.6.2 External Timing Reference
The following procedure describes how to configure the CX300 to use an external clock
source as a timing reference:
1.
Navigate to the
Clock Source screen
.
2.
Connect the external reference to the CX300’s RF Input Connector.
3.
Select the external reference from the
Clock Source menu
.
The Clock Source Indicator updates to identify the selected external reference.
4.6.3 GPS Timing Reference
The following procedure describes how to set the GNSS operation.
1.
Arrange the test set for GNSS operation.
See section 4.5, “Setting up GNSS”, on
).
2.
Navigate to the
Clock Source screen
.
3.
Select
GPS
from the
Clock Source menu
.
The
Clock Source Indicator
updates to identify the selected clock source.
NOTE
When selecting an external clock source, ensure that the clock source is connected to
the test set and that the external clock source is accurate to /- 500 ppb.
