Agilent Technologies E8362A, Service Manual

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Service Guide E8364-90001 4- 29
PNA Series Microwave Network Analyzers Troubleshooting
E8362A, E8363A, E8364A Measurement System Troubleshooting
• 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 (E8363A and E8364A only)
• the signal separation group
— A22 switch splitter
— A23 and A24 detectors (E8363A and E8364A only)
— 30-dB fixed attenuators (E8362A only)
— A25 and A26 test port couplers
— A36 and A37 60-dB step attenuators (Option UNL only)
— A38 and A38 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
Use the list on the following pages to help you determine in which analyzer functional
group to begin troubleshooting.
This is by no means an exhaustive list of possible symptoms nor possible failures. It is
recommended that you view the system block diagram, located at the end of this chapter,
as you review the entries in this list and while performing any of the troubleshooting
procedures listed.
Good judgement and established logical troubleshooting techniques must be used to