86 Chapter 2 
Front-Panel Key Reference
Det/Demod
NOTE It is normal to hear clicking sounds when the Auto Alignment function 
is On. During retrace, a small portion of the analyzer circuitry is 
realigned. Some of the switching of the analyzer circuitry is done using 
relays. It is the rapid switching of these relays during retrace that 
causes the clicking sounds. To eliminate the clicking sounds, turn the 
auto alignment off by pressing 
System, Alignments, Auto Align, Off. 
When this is done, the 
Align Now, All function should be performed 
periodically. Refer to the Specifications Guide for your instrument to 
learn more information on how often to perform 
Align Now, All when the 
auto alignment is off.