System Overview
R&S
®
CMW500
57User Manual 1173.9463.02 ─ 06
Depending on the repetition mode (see below), a measurement may extend over one or
several measurement cycles.
Statistic length in continuous measurement
The statistic length has an impact on continuous measurements because it enters into
the averaging procedures, see chapter 3.2.4.4, "Averaging", on page 60.
Repetition Mode
The repetition mode defines how many statistics cycles are measured. Two modes are
available for all measurements:
●
Single-Shot: The measurement is stopped after one statistics cycle.
●
Continuous: The measurement is continued until explicitly terminated by the user;
the results are periodically updated.
Manual and remote control
In contrast to other instrument settings, the repetition modes in manual and remote con-
trol 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 and "Sta-
tistic Length", irrespective of the limit check results.
●
On Limit Failure: The measurement is stopped as soon as one of the limits is excee-
ded, irrespective of the repetition mode set. If no limit failure occurs, it is performed
according to its "Repetition" mode and "Statistic Length". Use this setting for meas-
urements that are essentially intended for checking limits, e.g. production tests.
3.2.4 Statistical Results
The R&S CMW500 repeats the measurements according to the selected statistic count
and repetition mode.
Consecutive measurement values are stored and used to calculate statistical results. The
following sections describe the calculation of statistical results in detail.
3.2.4.1 Statistics Type
The statistics type defines how the R&S CMW500 calculates the displayed values if the
measurement extends over several measurement intervals. Assume that a trace or a bar
graph contains a series of different measurement points. After n consecutive measure-
Measurements
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