R&S ZVA
Repairs
1177.5333.02
3.93
E-11
Determining which Boards are defective
The table below lists boards that are probably defective based on the faults that occurred during the
performance test.
Defective board
Problem with:
Probable
Also possible
Frequency accuracy
Frequency reference
SSB phase-noise
Only one port
All ports
Synthesizer1
Frequency reference
Level accuracy
Only one port
All ports
Reflectometer associated with defective port
Synthesizer1
Max. output level
Only one port
All ports
Reflectometer associated with defective port
Synthesizer1
Absolute accuracy wave quantity a
Reflectometer associated with defective port
Level linearity
Reflectometer associated with defective port
Harmonic ratio
Reflectometer associated with defective port
Synthesizer1
Spurious suppression
Synthesizer1
Matching portx
Bridge unit of reflectometer associated with the
defective port
Directivity portx
Bridge unit of reflectometer associated with the
defective port
Receiver absolute accuracy Port 1, 2
Port 3, 4
All ports
Reflectometer associated with defective port
Reflectometer associated with defective port
Synthesizer1
Network controller1
Network controller2
Frequency reference
Receiver linearity for high levels Portx
All ports
Reflectometer associated with defective port
LO divider
LO divider
Synthesizer2
Receiver linearity for low levels Port1, 2
Port3, 4
Network controller1
Network controller2
Receiver noise level portx
Reflectometer associated with defective port
Synthesizer2 or
synth.1 for 2-port models
Dynamic range portx
Reflectometer associated with defective port
(see Circular 10028)
Synthesizer2 or.
synth.1 for 2-port models
DC measurement input1V
Motherboard
Network controller1
DC measurement input 10V
Motherboard
Network controller1
Frequency reference input/output
Frequency reference
Accuracy on S-parameter measurements
depending on meas. bandwidth
See Circular 10029
A board test should be performed before the board that has been deduced to be defective is replaced.
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