Agilent Technologies ESA Series User's/Programmer's Reference page 67

Auto
Average
When the
NOTE
the fastest sweet time is 8 milliseconds.
Peak
Chapter 2
The system selects peak detection as the default. If a
measurement condition arises where a different type of
detection scheme would be better utilized, the system
will use the alternate scheme. For example, the Marker
Noise function uses Average detection when in Auto
mode because the system determines that the data will
be more accurate for noise-type signals. Refer to
2-1 on page 57 for more information.
Key Access:
Det/Demod, Detector Auto Man
Average detection measures the average value of the
amplitude across each trace interval (bucket). The
averaging method will be set to either Video or Power
as appropriate when the Average Type is Auto coupled,
or it may be set explicitly with the
key.
Auto Man
Video Average detection computes the averaged trace
interval as appropriate to the Y-axis scale:
• Log-power average when in log scale.
• Voltage average when in linear scale.
• Frequency deviation when Demod View is enabled
for FM Demod.
Power Average ("root mean square" or RMS) detection
computes the RMS of the samples collected across the
trace interval. The number of samples included in the
RMS average for each trace interval depends on the
sweep time, the resolution bandwidth, and whether or
not option B7D is installed. With option B7D installed,
more samples are available as appropriate for wider
resolution bandwidths and faster sweep times. Slower
sweep times also increase the number of samples
averaged for each trace interval.
When is selected, Avg appears on the left side
Average
of the display.
detector is selected and the amplitude scale is linear,
Average
Key Access:
Det/Demod, Detector Auto Man
Peak detection is used primarily when measuring
sinusoidal (spectral) components. Peak detection
obtains the maximum video signal value between the
last display point and the present display point and
Front-Panel Key Reference
Det/Demod
Figure
,
BW/Avg Avg Type
67