Where To Begin Troubleshooting - Agilent Technologies PNA Series Service Manual

PNA Series Microwave Network Analyzers
E8361A
• If all traces are present and are similar to the traces in
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"
— If a problem still exists, contact Agilent. Refer to
• 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
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 12
— A18 MA 24
— A19 splitter
— A20 LODA
— A21 SOMA 50
— A23, A24 SOMA 70
• the signal separation group
— A22 switch
— A25 and A26 test port couplers
— 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
Service Guide E8361-90001
Measurement System Troubleshooting
Figure 4-9, then there are no
and perform all the tests in that section.
"Contacting Agilent" on page
Troubleshooting
2-10.
"Where to
4- 31