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 E4402B, E4403B, E4404B, E4405B, E4407B, or E4408B, 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.

18

Chapter 1