Input - (Trace Input For Apd Measurements) - Keysight Technologies FieldFox B Series User Manual

Electromagnetic Interference (EMI) Measurements – Option 361
EMI Measurements Mode Settings
Repeat the detection setup process as needed for up to 4 traces and 3
detection methods.
Input – (Trace Input for APD Measurements)
This softkey is active when APD Statistics is the selected CISPR Measurement.
See also,
Control" on page
— Press Trace 6 >
Keysight N9938-90006 User's Guide
data point displays the minimum value encountered during its
bucket. If the signal is NOT classified as noise (does NOT rise and fall)
then Normal is equivalent to Positive Peak.
— Negative Peak [#NPk] Displays the minimum value of all the
measurements in each bucket.
— Sample
[#Smp] Displays the center measurement of all the energy
detected in each bucket. This setting gives a good representation of
the random noise in each bucket. However, it does not ensure that all
signals are represented.
— Average [#RMS] Displays the Root Mean Squared (RMS) average
power of all the measurements in each bucket. This is the preferred
method when making power measurements.
The following softkey is available for most CISPR Band choices, but not
APD Statistics:
— Positive Peak [P] Displays the maximum value of all the
measurements in each bucket. This setting ensures that no signal is
missed. However, it is not a good representation of the random noise
in each bucket.
The following softkeys are only available when the CISPR Band softkey is
set to CISPR Band Scan scan or CISPR Band Zoom Scan.
— Quasi Peak [Q] Displays the quasi-peak response, as defined by
CISPR 16.
— EMI Average [A] Displays the Root Mean Squared (RMS) average
power of all the EMI measurements in each bucket. This is the
preferred method when making power measurements.
"CISPR (International Special Committee on Radio Interference)
321.
Input – Selects the type of data type that is used to display
the APD statistics trace based on the APD Dwell Time. Then choose:
— CCDF – A CCDF curve shows how much time the signal spends at or
above a given power level. The power level is expressed in dB relative
to the average power. The percentage of time a signal spends at or
above each line defines the probability for that particular power level.
A CCDF curve is a plot of relative power levels versus probability.
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