Additional Notes On Limit Testing - HP 8711C User Manual

Using Instrument Functions
Using limit Testing
Stimulus end Amplitude
In frequency sweep mode, the stimulus values are interpreted as frequencies;
Values
in power sweep mode, the stimulus values are interpreted as output power
levels.
The values entered for stimulus and amplitude are unitless. If the
C A U T I O N
measurement format is changed after limit lines are set, the amplitude values
do not automatically change. Therefore, you should select the format you
want to use before entering your limits.
Calculating the
Frequency of a Data
Point
The frequency of each data point is calculated using the following formula:
Freq (pi!-number) =
where
number-of-points
limit Testing and
Limit testing is only performed on actual data points,
Measurement Points
between them. The limit lines or points that you enter are converted
to values at each measurement point. Most of the time, this has little or
no effect on the validity of the limit testing. However, note the following
examples of problems that could arise when using limit lines:
4-44
深圳市盛腾仪器仪表有限公司
(p-t-number - x (stop-freq - start-freq)
1)
number-of -points -
pt-number
ranges from 1 (for the leftmost display point) to
(the rightmost display point).
Tel:0755-83589391
+ start-freq
1
not
interpolated values
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