Logarithmic Frequency Sweep (Hz); List Frequency Sweep (Hz); Segment Menu - Agilent Technologies 8719D User Manual

Logarithmic Frequency Sweep (Hz)

The XJXZ-BNK~ softkey 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 of 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.

List Frequency Sweep (Hz)

The ~~~~~~~~~, softkey provides a user-definable arbitrary frequency list mode. This list is
defined and modified using the edit list menu and the edit subsweep 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 all of the frequency
segments can be measured and displayed without loss of calibration.
When the ~~~~~~~~~;; key is pressed, the network analyzer sorts all the defined 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 all data taken. If duplicate frequencies exist, the
analyzer makes multiple measurements on identical points to maintain the specided 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

any single segment (~~:~~~~~~~~~~.3 in the frequency list or all of the segments
,
Refer to "Modifying List Frequencies" in this section for information on how to enter or modify
the list frequencies. If no list has been entered, the message CAUTION: LIST TABLE EMPTY is
displayed.
A tabular printout of the frequency list data can be obtained using the ~~~~~~~ function
in the copy menu.