Agilent Technologies E8362B Service Manual page 123

PNA Series Microwave Network Analyzers
E8362B, E8363B, E8364B
Source Group Tests
A defective A22 switch splitter can exhibit the same symptom as a faulty
NOTE
source. Therefore, if it is determined that the source is functioning properly,
you are directed to
Equipment Used for These Tests
Equipment Type
Spectrum analyzer
Power meter
Power sensor, 3.5 mm
RF cable, 3.5 mm (f) to 3.5 mm (f)
Power sensor, 2.4 mm
RF cable, 2.4 mm (f) to 2.4 mm (f)
Getting Ready to Test
Before checking the assemblies, you must open the analyzer.
Use an antistatic work surface and wrist strap to reduce the chance of
CAUTION
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
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
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.
Service Guide E8364-90026
"Checking the Signal Separation Group" on page
Models
Used With
All
All
E8362B
E8362B
E8363B, E8364B
E8363B, E8364B
"Removing the Covers" on page
Measurement System Troubleshooting
Model or Alternate Model
Part Number or Part Number
8565E None
E4418B/19B E4418A/19A
8485A None
85131C Any
8487A None
85133C Any
"All Traces" on page
Troubleshooting
4-48.
7-6.
4-33.
4-41