Agilent Technologies E4406A manual Measurement Bar. Displays information about

Models: E4406A

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Measurement Bar. Displays information about

Getting Started

Display Annotation

 

6.

Measurement Bar. Displays information about

 

 

measurements including some mode setup parameters.

 

7.

Current Measurement Annotation.

 

8.

The Annunciators bar displays annunciators that

 

 

indicate that hardware errors, other errors, or specific

 

 

instrument states, are detected in the instrument, as

 

 

explained below. Error indicators are shown in red text.

 

 

Where applicable, some states will appear in green,

 

 

indicating that the feature is active and performing

 

 

correctly. Informational annunciators are shown in

 

 

white text. To view error messages fully you will use

 

 

keys in the Show Errors menu (see page 52). The current

 

 

error message with the highest priority will also appear

 

 

in the Status/Info Bar that appears at the bottom of the

 

 

display. The following annunciators are available:

 

 

Unlock - This annunciator indicates that one or

 

 

more of the internal phase-locked loops are unable to

 

 

maintain a phase-locked state.

 

 

Corr Off (corrections off) - This annunciator

 

 

appears when the Corrections softkey is set to off.

 

 

Err (error) - This annunciator appears when an

 

 

error message is placed in the history error queue. It

 

 

will persist until you use the Clear Error Queue(s) key

 

 

to clear the history error queue.

 

 

Ext Ref (external reference) - The green Ext Ref

 

 

annunciator indicates that the external reference

 

 

has been selected and the instrument is locked to it.

 

 

The red Ext Ref annunciator indicates that the

 

 

external reference has been selected, but the

 

 

instrument is not locked to that reference. Note that

 

 

the external reference on this instrument can be set

 

 

at any frequency between 1 and 30 MHz; if the

 

 

entered value does not correspond to the external

 

 

reference that is in use, a red Ext Ref annunciator

 

 

will appear.

 

Be aware that the value entered for the external reference frequency

NOTE

 

will persist, even after the instrument has been powered off. The user

 

must manually enter a new value for the external reference if a

 

different value is required, even if it corresponds with the default value.

An Ext Ref annunciator will appear only if the external reference has been activated by the user.

34

Chapter 1

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Agilent Technologies E4406A manual Measurement Bar. Displays information about