4-32 Service Guide E8364-90026
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting E8362B, E8363B, E8364B
• If all traces are present and are similar to the traces in Figure 4-9, then there are no
major problems with the analyzer’s measurement system. There may, however, be a
minor failure in the analyzer.
To test further:
—Go to Chapter 3 , “Tests and Adjustments,” and perform all the tests in that section.
— If a problem still exists, contact Agilent. Refer to “Contacting Agilent” on page 2-13.
• If any of the traces are not present, are noisy or distorted, or are at an incorrect level,
then there is a problem with the analyzer’s measurement system. Proceed to “Where to
Begin Troubleshooting”.
Where to Begin Troubleshooting
For the purposes of troubleshooting, the analyzer block diagram is divided into the
following functional groups:
• the source group
— A8 fractional-N synthesizer
— A10 frequency reference
— A11 phase lock
— A12 source 20
— A16 test set motherboard
— A17 LOMA 10
— A18 MA 20
— A19 splitter
— A20 LODA
— A21 SOMA 50 (E8363B and E8364B only)
• the signal separation group
— A22 switch splitter
— A23 and A24 detectors (E8363B and E8364B only)
— 30-dB fixed attenuators (E8362B only)
— A25 and A26 test port couplers
— A36 and A37 60-dB step attenuators (Option UNL only)
— A38 and A39 bias tees (Option UNL only)
— Port 1, Port 2, A, B, R1, and R2 ports
• the receiver group
— A27, A28, A29, and A30 first converters
— A31 receiver A
— A32 receiver R1
— A33 receiver R2
— A34 receiver B
— A35 receiver motherboard
—A6 SPAM
• the frequency offset group (Option 080 only)
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