Keysight Technologies N9321C, Руководство пользователя

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Key Reference
BW
110
Voltage
Selects the logarithmic (decibel) scale for all filtering
and averaging processes. This scale is “Video” because it is the
most common display and analysis scale for the video signal within
a spectrum analyzer. This scale is excellent for finding CW signals
near noise. When this type of averaging is selected, LgAv appears
on the left side of the display.
Power
In this average type, all filtering and averaging processes
work on the power (the square of the magnitude) of the signal,
instead of its log or envelope voltage. This scale is best for
measuring the true time power of complex signals. When this type
of averaging is selected, PAvg appears on the left side of the
display.
Log Pwr
In this Average type, all filtering and averaging
processes work on the voltage of the envelope of the signal. This
scale is good for observing rise and fall behavior of AM or
pulse-modulated signals such as radar and TDMA transmitters.
When this type of averaging is selected, VAvg appears on the left
side of the display.
There are actually four types of averaging processes within a
N932xC. All, except VBW filtering, are affected by this setting. They
are listed as follows:
• Trace averaging
Averages signal amplitudes on a trace-to-trace basis. (Press
Log
Pwr
or
Pwr
)
• Average detector
Averages signal amplitudes during the time or frequency interval
and represents the result as a single measurement point.
• Noise marker
Averages signal amplitudes across measurement points to reduce
variations for noisy signals.
• VBW filtering
Performs a form of averaging of video signal.