
Logarithmic Frequency Sweep (Hz)
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The
activates a logarithmic frequency sweep mode. The source is stepped
in logarithmic increments and the data is displayed on a logarithmic graticule. This is slower
than a continuous sweep with the same number
points, and the entered sweep time may
therefore be changed automatically. For frequency spans of less than two octaves, the sweep
type automatically reverts to linear sweep.
Stepped List Frequency Sweep (Hz)
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frequency sweep modes. The stepped list mode allows the analyzer to sweep a list of arbitrary
frequency points This list is
and modified using the edit list menu and the edit
menu. Up to 30 frequency subsweeps (called “segments”) of several different types
can be specified, for a maximum total of 1632 points. One list is common to both channels.
Once a frequency list has been defined and a measurement calibration performed on the full
frequency list, one or of the frequency segments can be measured and displayed without
loss of calibration.
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frequency
segments
into CW points in order of increasing frequency. It then measures each
point and displays a single trace that is a composite of data taken. If duplicate frequencies
exist, the analyzer makes multiple measurements on identical points to maintain the specified
number of points for each subsweep. Since the frequency points may not be distributed evenly
across the display, the display resolution may be uneven, and more compressed in some parts
of the trace than in others. However, the stimulus and response readings of the markers are
always accurate. Because the list frequency sweep is a stepped CW sweep, the sweep time is
slower than for a continuous sweep with the same number of points
Segment Menu
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See below for information on how to enter or modify the list frequencies. If no list has been
entered, the message
is displayed. A tabular printout of the
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frequency list data can be obtained using the
function in the copy menu.
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ii
This menu is used to edit the list of frequency segments (subsweeps)
with the edit
menu, described next. Up to 30 frequency subsweeps can be specified, for a
maximum of 1632 points. The segments do not have to be entered in any particular order:
the analyzer automatically sorts them and shows them on the display in increasing order of
start frequency. This menu determines which entry on the list is to be modified, while the edit
menu is used to make changes in the frequency or number of points of the selected
entry.
Application and Operation Conccptc
Содержание HP 8753E
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Страница 138: ...Figure 2 62 aw000024 Gating Effects in a Frequency Domain Example Measurement Making Measurements 2 87 ...
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