62 Chapter 2
Overall Troubleshooting
Troubleshooting Using Front Panel Keys
Using Alignment Features
Press: System, Alignments.
Alignment Keys
Auto Align
Align All Now
Align Subsystem
Align RF
Align IF
Align ADC
Align Current IF Flatness
Align Current SysGain
Restore Align Defaults
Auto Align
Auto Align can be set to one of three states listed below. Regardless of
the auto align state, an alignment will automatically occur whenever
the instrument power is cycled.
When the
Auto Align (ON) state is selected, the instrument will
automatically run all alignments in Table 2-2 every 24 hours or if the
internal instrument temperature changes ± 3 degrees C from the last
alignment. The alignment routine is the same as if you pressed the
Align All Now. The instrument will not sweep while the alignments are
running. After the alignment routine completes, the instrument reverts
back to the pre-alignment state. Therefore, if the instrument is
performing a measurement and an auto align is triggered, the
measurement will be interrupted, possibly causing a measurement
error, until the auto align completes.
The
Auto Align (Off) key causes neither automatic alignments nor an
alert to occur.
The
Auto Align (Alert) key causes an alert message to appear on the
display when, (1), a 3 degree (Celsius) change in temperature is
detected, or (2), at 24 hour intervals. The message will prompt you to
perform an alignment, but no alignment will occur automatically.
NOTE An annotation at the left side of the screen that reads “AA” will appear
when the Auto Align On or Alert features are active.
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