Service Guide E8364-90026 4-49
PNA Series Microwave Network Analyzers Troubleshooting
E8362B, E8363B, E8364B Measurement System Troubleshooting
Checking Port 2 Power (B Signal)
The object of this check is to verify the power of the B signal across the entire frequency
range. Perform this test if there is an observed problem only with the channel B trace. The
ten second sweep is slow enough to allow you to observe the output power on the power
meter as the sweep occurs.
1. Connect the power sensor to Port 2.
2. Observe the power reading on the power meter as the sweep occurs on the analyzer.
3. The measured output power on the power meter should be within −12 dBm ±4 dB for
E836xB with no options or −17 dBm ±4 dB for E836xB with options, over the entire
frequency range.
Checking the Signal through the Signal Separation Path
For all of the following checks, refer to the block diagrams at the end of this chapter and to:
• “Bottom Assemblies, No Options” on page 6-20 and
• “Bottom Assemblies, Option UNL” on page 6-24 thru “Bottom Semi-Rigid Cables,
Options UNL/014/016/080/081” on page 6-58 (as required)
Port 1 trace loss in the signal separation group is due to one or more of the following
assemblies being defective:
• A22 switch splitter
• A25 test port 1 coupler
• A36 60-dB step attenuator (Option UNL)
• A38 bias tee (Option UNL)
Port 2 trace loss in the signal separation group is due to one or more of the following
assemblies being defective:
• A22 switch splitter
• A26 test port 2 coupler
• A37 60-dB step attenuator (Option UNL)
• A39 bias tee (Option UNL)
Equipment Used for These Tests
To determine which assembly is defective, check the signal at each available measurement
point in the signal path from the A22 switch splitter to the test port coupler.
For Port 1 measurements, set the network analyzer for an S
11
measurement with a CW
frequency of 1GHz.
Equipment Type
Models
Used With
Model or
Part Number
Alternate Model
or Part Number
Spectrum analyzer All 8565E
856xE
1
1. Must be capable of measuring a signal at 1 GHz.
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