N9030B PXA Signal Analyzer Service Guide 73Boot Up and Initialization TroubleshootingPotential Problems During Boot ProcessFails an Initial AlignmentTroubleshooting Alignment Failures Using the Alignment HistoryScreenAt instrument power on, an initial alignment is automatically performed. It isalso possible to manually trigger an alignment by pressing System,Alignments, Align Now, All. The power on alignment performs a few morealignments than the manual Align Now All routine.The number of alignments depends on the hardware options present in thesignal analyzer.Using an external USB keyboard and mouse, access the alignment history,which can be found in a text file at:E:AlignDataStorage\AlignmentHistory.txtYou 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 multiplemeasurements are made for a given alignment routine, and measured valueswith upper and lower limits are given. For example, the Mechanical AttenuatorAlgorithm 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 inputattenuator drawing on the PXA RF Block Diagram, you can determine whichattenuator steps are available on each of the two input attenuators. Then youcan view the troubleshooting information for the Front End Controller ordeduce from the attenuator steps that fail, which attenuator is faulty.Assure there is no 50 MHz signal above 0 dBm applied to the signalanalyzer input when the alignment routine is performed. This can causeerrors.The description of the alignment and the alignment hardwaredependencies are listed in Table 2-3.
