Keysight Technologies FieldFox N9913A Service Manual

Also see for FieldFox N9913A: User guide Security features and volatility documentation Configuration guide

Contents

Keysight Technologies FieldFox N9913A Service Manual Manual pdf 47 page image

Keysight FieldFox Handheld Analyzers Service Guide 47TroubleshootingMeasurement Group TroubleshootingMeasurement Group Troubleshooting— Make sure the unit is warmed up for at least 30 minutes.— Make sure the correct cal kit definition is being used; erase user data toforce use of factory cal kit definitions (see Chapter 8 for information on the“Erase User Data Utility”).Problems in NA ModeEvery FieldFox contains a factory calibration that was performed at the port 1and port 2 connectors over the entire frequency range of the FieldFox using anumber of data points that allows reasonable interpolation over the FieldFoxfrequency range.This calibration, known as CalReady, allows you to immediately make accuratemeasurements for a DUT that is connected directly at the test ports (PORT 1and/or PORT 2). CalReady corrects measurements when the FieldFox is turnedON, when Preset is pressed, and when a measurement is created with no othercorrection in place.If you are seeing a problem at Preset, perform the standard S-parameter testset troubleshooting procedure, starting with the following procedure:“Checking the A, B, R1, and R2 Signals (NA Mode)”.Checking the A, B, R1, and R2 Signals (NA Mode)The first step is to verify that the A, B, R1, and R2 traces are present and thatthey are approximately level:— To access this:1. Press Trace, 32. Select 3. Choose 4. Select 5. Press Measure, 16. Choose 7. Select 8. Repeat Steps 1, 4, 5, 6, and 7 for Receivers B, R1, and R2.— Traces A, B, R1, and R2 are displayed in four separate data windows asshown in Figure 4-2 on page 48. Identifying discrepancies of the traces inthese windows can help you to isolate the faulty assembly.