4-25 Limit Chapter 4 — Spectrum Analyzer
4-40 MS20xxA VNA Master UG 10580-00166 Rev. C
Upper Points, ## (if Upper Limit is selected)
or
Lower Points, ## (if Lower Limit is selected)
Use this soft key to define how many inflection points you want for the selected
upper or lower limit envelopes. The value can be between 2 and 41. Note that the
upper and lower limit lines do not need to have the same number of points.
Upper Offset, ## dB (if Limit is toggled to Upper)
or
Lower Offset, ## dB (if Limit is toggled to Lower)
This soft key is used to define how far away from the measured signal the upper
or lower envelope will be placed. The limits are ±100 dB. For an upper envelope,
usually the value will be positive in order to place the envelope above the signal.
for a lower envelope, the value will usually be negative in order to place the
envelope below the signal.
Upper Shape, Square/Slope (if Limit is toggled to Upper)
or
Lower Shape, Square/Slope (if Limit is toggled to Lower)
With this soft key you can choose whether the default for the upper or lower
envelope will be with flat tops and reasonably vertical lines to change level or
whether the envelope will have sloped lines between adjacent inflection points.
When the square envelope type is selected, two inflection points are used for each
horizontal segment. You can toggle between a square envelope and a sloped
envelope by pressing this soft key.
Back
Press this soft key to return to the Limit soft key menu
10580-00166C.book Page 40 Thursday, February 21, 2008 12:52 PM
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