Chapter 1 17
Installation and Setup
Running Internal Alignments
Running Internal Alignments
Each time the analyzer is powered on, the internal alignment routine runs automatically.
The analyzer was shipped from the factory with the Alignments mode set to
Auto,
Align All.
NOTE When the Alignment routine runs, you will hear the attenuator settings changing, which
generates noise. This is not an indication of trouble.
Manually Performing an Alignment
If the analyzer is an Agilent Technologies E7402A, E7403A, E7404A, or E7405A, connect a BNC cable
from the AMPTD REF OUT to INPUT 50 Ω using an adapter. After a 5 minute warm-up, press
System,
Alignments, Align Now, All.
NOTE It is normal to hear clicking when the Auto Alignment function is on. During the interval
between sweeps, portions of the analyzer’s circuitry are realigned. Some of the circuitry
is controlled by relays. It is the rapid switching of these relays between sweeps which
causes the clicking sound. Under normal operation, these relays will last over 50 years.
To eliminate the clicking sound, turn off the automatic alignment. (See the Alignments
key description in your User’s guide.”) With
Auto Align turned off, however, the Align
Now All function should be performed periodically. For more information on how often
to perform Align Now All when the Auto Alignment function is off, refer to the
appropriate “Specifications and Characteristics” chapter in your specifications guide.
If
Auto Align, Off is selected, refer to the Specifications guide for the conditions required to maintain
calibration.
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