Fails An Initial Alignment - Keysight N8973B Service Manual

Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
If there is a problem with any of these initializations not completing or causing
an error message to be displayed refer to the instrument Event Log. This can
be accessed by using an external USB keyboard and mouse and selecting
Start, Command Prompt, enter Eventvwr.exe, and select OK.
Once the Event Viewer comes up, look under SA for the latest error entries.
Double-click on the entries to view further details, which should give you some
idea of what the problem is.

Fails an Initial Alignment

Troubleshooting Alignment Failures Using the Alignment History Text
File
At instrument power on, an initial alignment is automatically performed. It is
also possible to manually trigger an alignment by pressing System,
Alignments, Align Now, Align Now All. The power on alignment performs a
few more alignments than the manual Align Now All routine.
The number of alignments depends on the hardware options present in the
signal analyzer.
Using an external USB keyboard and mouse, access the alignment history,
which can be found in a text file at:
E:AlignDataStorage\AlignmentHistory.txt
You will find the most current alignment information at the bottom of this file.
Look for the failed alignments. From the windows task bar you can click Edit,
Find and type in FAILED and search for a failure.
Note that the information in the history file usually shows that multiple
measurements are made for a given alignment routine, and measured values
with upper and lower limits are given. For example, the Mechanical Attenuator
Algorithm measures and displays all of the attenuator step values. In this case,
you can view which steps fail, and by how much. Then based on the input
attenuator drawing on the RF Block Diagram, you can determine which
attenuator steps are available on each of the two input attenuators. Then you
can view the troubleshooting information for the Front End Controller or
deduce from the attenuator steps that fail, which attenuator is faulty.
Assure there is no 50 MHz signal above 0 dBm applied to the signal
analyzer input when the alignment routine is performed. This can cause
errors.
The description of the alignment and the alignment hardware
dependencies are listed in
62
Table 2-1, "Initial Alignments,".
Keysight NFA Series Noise Figure Analyzers Service Guide