Chapter 5 mA-1302/mA-1305 Control and Operation
Configure Clock References
Rev. D0
mA-1302/mA-1305 AXIe Chassis Operation Manual
May 2020
Page 5-21
Configure Clock References
Refer to the section titled “Clock (Timing) Configuration Page” for details about Chassis
Clock references and settings.
Internal Reference Timing Source
This procedure provides instructions to manually configure a Chassis to use the system's
internal 100 MHz reference as a timing source.
How to Configure Internal Reference Timing Source
1
Navigate to the Clock Routing Diagram of the Chassis Web UI.
–
Access: Main Menu > Clock Diagram
2
Select the INT_REF Signal Relay Switch.
External Reference Timing Source
When the Chassis is powered on, the Shelf Manager performs a standardized discovery
routine which identifies Chassis Input/Output signal connections. The Shelf Manager must
detect a valid external frequency reference signal at the Chassis External Reference Input
Connector in order to configure the Chassis to use an external reference as a timing
source.
This procedure provides instructions to configure a Chassis to use an External Reference
as a timing source.
How to Configure Internal Reference Timing Source
1
Connect an external 10 MHz or 100 MHz frequency reference to the Chassis'
External 10/100 MHz Reference Input Connector.
2
Navigate to the Clock Routing Diagram of the Chassis Web UI.
–
Access: Main Menu > Clock Diagram
3
Select the 10/100 MHz EXT_REF Signal Relay Switch.
NOTE
In order for an external frequency reference to be valid the signal must be within the
Chassis' lockable frequency range. Refer to the Chassis data sheet for valid frequency
range.
NOTE
If a 10/100 MHz External Frequency Reference is not available an error message is
displayed and the system defaults to the Internal Frequency Reference.
Summary of Contents for mA-1302
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