214 – Reference
Component Condition Measurement Answer Comment
terminated?
What scan rate is being
used to measure the
device?
If set in continuous mode,
does the IL vary from one
scan to the next?
Device
Measurement
What mode is being used
for measurement?
IL
PDL
Are there any other
devices, such as a
circulator or a switch,
between the CM and the
device?
YES
NO
System Noise
SWS
software
running
Action: Take a zero-loss
reference on one channel.
Continuously acquire
traces. The noise on the
plot should be between
-0.025 dB and +0.025 dB.
What is the maximum
magnitude of the noise
seen on the plot?
Is the trace mostly less
than this (~0.01 dB)?
YES
NO
Is the trace flat around 0
dB?
Does the average value of
the insertion loss drift, with
time, by more than 0.005
dB?
YES
NO
Does the noise start
suddenly in the scan?
YES
NO
Does the noise stop
suddenly in the scan?
YES
NO
Is the noise present on all
scans?
YES
NO
If the noise is intermittent,
how frequently does it
appear?
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