9.2.2 Elimination of Multiple Static PIM Faults
In situations where RTF analysis reveals multiple static PIM faults in the system under test, it is strongly recommended
that the user repairs only one fault at a time, starting with the largest. When the largest fault has been repaired, a new
RTF sweep should be performed and the above process repeated until all faults have been eliminated. DO NOT attempt
to repair multiple static PIM faults based on the results of a single RTF sweep.
9.2.3 PIM Testing Flowchart
The diagnosis and repair of PIM faults in the RF infrastructure should be carried out in a methodical manner. A flowchart
of the recommended procedure is shown in Figure 43. Steps that involve RTF Analysis are highlighted in yellow.
Figure 43 PIM testing flowchart including RTF analysis
NO
NO
NO
NO
YES
YES
YES
YES
START
Perform STATIC
system PIM test
Fail static
PIM test?
Disconnect jumper
from antenna port
Attach low-PIM load
to end of feed system
Switch iQA/iPA
software to RTF
Mode
Perform Range to
Fault Analysis
Repair
LARGEST PIM
problem identified
Fail RTF
Analysis?
Perform DYNAMIC
system PIM test
Fail dynamic
PIM test?
Record passing
system results
Repair PIM
problem found
END
Remove low PIM
load
Reconnect antenna
to feed system
Switch iQA
software to
PIM Test
Mode
Perform DYNAMIC
feed system PIM
test (low-PIM load
still installed)
Repair PIM
problem found
Fail dynamic
PIM test?
Operating Manual
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Passive Intermodulation and Return Loss Fault Ranging Device
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