Stepped Edit Subsweep Menu

Using the .X&g? or &&i, softkey within the edit list menu wiIl display the edit subsweep menu.

.< i..

This menu lets you select measurement frequencies arbitrarily. Using this menu it is possible to define the exact frequencies to be measured on a point-by-point basis. For example, the sweep could include 100 points in a narrow passband, 100 points across a broad stop band, and 50 points across the third harmonic response. The total sweep is defined with a list of subsweeps.

The frequency subsweeps, or segments, can be delined in any of the following terms:

nstart/stop/number of points

nstart/stop/step

ncenter/span/number of points

ncenter/span/step

nCW frequency

The subsweeps can overlap, and do not have to be entered in any particular order. The analyzer sorts the segments automatically and lists them on the display in order of increasing start frequency, even if they are entered in center/span format. If duplicate frequencies exist, the analyzer makes multiple measurements on identical points to maintain the specified number of points for each subsweep. The data is shown on the display as a single trace that is a composite of all data taken. The trace may appear uneven because of the distribution of the data points, but the frequency scale is linear across the total range.

Once the list frequencies have been deflned or modified, the list frequency sweep mode can be

p. ::;:.:::.::::~,::::::::::::::::.:..~..~.:.;;.;...:.:.:.:..:.:.: ......:,/ .~~.~~.~~.~~.~~.....~~~.~.~~~~

/ i

./>;....

iL. i/

...........>......

; ;; ; ,,..:

...::

s&c&d with the ~~~~~~~~~~~~~' s&key h the sweep type menu. The frequency fiti ;?:..:;:;?<+... ::.~.~~.....~.;.:..................... ..........;>a,.........................*...../...~...;..;;: ............:.::... ..,...,

parameters can also be saved with an instrument state.

6-24 Application and Operation Concepts