Agilent Technologies E4406A, Руководство пользователя

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Chapter 2 69
Using System Features
Using Input/Output Configuration Keys
Reference
Press the Reference menu key to activate a menu which allows you to
select an external reference, or to deactivate a 10 MHz out signal on the
rear panel.
• Freq Ref - Allows you to select an external or an internal (the
default) reference. When toggled to Ext (external) you will set the
external reference frequency by entering a value between 1 and 30
MHz. When the instrument is locked to an external reference a
green Ext Ref indicator will appear in the annunciator bar.
External reference values are persistent. This means that the external
reference frequency you select will remain active until it is changed,
even if the instrument is turned off and on, or preset. If the frequency
you have input to the rear panel external frequency connector is not
the same as the external frequency value you have manually set, a red
Ext Ref error indicator and a red Unlock error indicator will appear
in the annunciator bar.
• 10 MHz Out - Activates, or deactivates, the 10 MHz out signal on
the rear panel of the instrument. The 10 MHz out can be used to lock
other test equipment to the same frequency reference that is used by
the transmitter tester. Once activated, the 10 MHz out feature is
persistent, so if it is set to On it will remain on, even if the
instrument has been preset, or powered off and then on.
Front Panel
Key Level 1 Level 2 Toggle Entry
System Reference Freq Ref
Int/Ext When toggled
to Ext, enter
any value
between 1
and 30 MHz
10 MHz Out
Off/On