External Reference Clock with LabSat 4
This article contains information about how to use an External Reference clock input with the LabSat 4 product range.
External Reference Clock Input
The LabSat 4 product range features an external reference input for synchronization to a 10 MHz clock. To use this feature, connect a 10 MHz reference signal with a minimum + 3 dB level to the REF SMA connector and ensure that the External 10MHz reference clock option is ticked in Menu -> Setup -> CLK REF -> External 10 MHz in the Display Menu or in the System Setup menu in the LabSat 4 Web Server.
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| Note: When LabSat 4 operates from the internal TCXO or OCXO, you can configure the REF connector to output a 10 MHz reference that can be used by other equipment. This is enabled by ticking the REF OUT menu option which is visible only when internal TCXO or OCXO is enabled. |
When you have enabled the External 10MHz option on LabSat 4, you will see the following symbol displayed on the File Selection Screen when you exit the menu:
The circular symbol next to the battery symbol indicates that the External 10MHz reference has been enabled.
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| When the symbol is white, the reference has been enabled but there is no valid signal present. | When the symbol is black, the reference has been enabled and there is a valid signal present. The unit is ready to record. |