CMU Measurement Control
1100.4903.12 3.19 E-9
Counting Repeated single shot measurement with a fixed number of
statistics cycles
The repetition mode is set in the Control tab of the measurement configuration
popup-menus.
Note: In contrast to other instrument settings, the repetition modes in
manual and remote control are independent and do not overwrite
each other. The default repetition mode in manual control is
Continuous (observe results over an extended period of time), the
default mode in remote control is Single Shot (perform one
measurement and retrieve results).
Stop Condition
For measurements providing a limit check, two stop conditions can be selected:
None The measurement is performed according to its repetition
mode, regardless of the measurement results,
On Limit Failure The measurement is stopped as soon as one of the limits is
exceeded, regardless of the repetition mode set. If no limit
failure occurs, it is performed according to its repetition mode.
Some other stop conditions are defined for network tests. See the relevant
manuals for more information.
The stop condition is set in the Control tab of the measurement configuration
popup-menus.
Display Mode
In graphical measurement diagrams, the display mode defines which of the
measured and calculated curves (traces) is displayed if the measurement
extends over several evaluation periods. In general, traces are evaluated at a
set of fixed, equidistant test points (samples). After n evaluation periods, n
measurement results per test point have been acquired. After a single shot
measurement extending over c periods, c measurement results per test point
have been acquired.
Current The current burst, i.e. the last result for all test points, is
displayed.
Minimum At each test point, the minimum value of all bursts measured
is displayed.
Maximum At each test point, the maximum value of all bursts measured
is displayed.
Average At each test point, a suitably defined average over all bursts
measured is displayed; see paragraph on Calculation of
average quantities below.
Note the difference in the calculation of Average on one hand, Minimum,
Maximum and Max./Min. on the other hand, if the measurement extends over
more than one statistic count (repetition mode Continuous, measurement time
longer than one statistic count).
After evaluation of the different traces, the burst power is logarithmized and
plotted in a semi-logarithmic diagram.
The display mode is set in the Control tab of the measurement configuration
popup-menus.
Calculation of
average quantities
The Average traces in the Spectrum menus are obtained as follows:
Let c be the number of bursts forming one statistics cycle (one statistic count)
and assume that n bursts have been measured since the start of the
measurement. In calculating the Average trace, the following two situations are
distinguished:
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