Agilent Technologies N5230A User Manual

4-36 Service Guide N5230-90014
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5230A
Source Group Tests
NOTE A defective test port switch can exhibit the same symptom as a faulty source.
Therefore, if it is determined that the source is functioning properly, you are
directed to “Checking the Signal Separation Group” on page 4-42.
Equipment Used for These Tests
Getting Ready to Test
Before checking the assemblies, you must open the analyzer.
CAUTION Use an antistatic work surface and wrist strap to reduce the chance of
electrostatic discharge for all of the procedures in this chapter.
1. Turn off the analyzer power.
2. Unplug the power to the analyzer and disconnect all rear panel connections.
3. Remove the covers from the analyzer. Refer to “Removing the Covers” on page 7-6.
WARNING Procedures described in this document are performed with power
supplied to the product while protective covers are removed. Energy
available at many points may, if contacted, result in personal injury.
4. With the covers off, plug in the analyzer and turn on the power.
Single vs. Broadband Failure
There are two main types of failures that are related to the source group. The failures are
classified as:
• broadband
• single band
Single band failures are indicated by all four channel traces having partial dropouts across
the frequency range or intermittent phase lock problems. Troubleshooting information is
provided under “If the traces faults are band-related,” under “All Traces” on page 4-29.
Broadband failures are indicated by all four channel traces being in the noise floor. Most
often this is due to problems in the phase lock signal path and will be characterized by a
“PHASE LOCK LOST” error message on the display.
Equipment Type
Models
Used With
Model or
Part Number
Alternate Model or
Part Number
Spectrum analyzer All 8565E None
Power meter All E4418B/19B E4418A/19A
Power sensor, 3.5 mm All 8485A None
RF cable, 3.5 mm (f) to 3.5 mm (f) All 85131C Any

Agilent Technologies N5230A Specifications

General

Brand	Agilent Technologies
Model	N5230A
Category	Measuring Instruments
Language	English