Ignore-Out-Of-Lock Mode - Agilent Technologies e1420b User Manual

Phase noise measurement system

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Advanced Software Features

Ignore-Out-Of-Lock Mode

The Ignore Out Of Lock test mode enables all of the troubleshooting mode

functions, plus it causes the software to not check for an out-of-lock condition

before or during a measurement. This allows you to measure sources with high

close-in noise that normally would cause an out-of-lock condition and stop the

measurement. When Ignore Out Of Lock is selected, the user is responsible for

monitoring phase lock. This can be accomplished using an oscilloscope

connected to the test set Aux. Monitor port to verify the absence of a beatnote

and monitor the dc output level.

• When Ignore Out Of Lock is selected, the test system does not verify the

phase lock of the measurement. The user must ensure that the

measurement maintains phase lock during the measurement.

Agilent E5505A User's Guide