System Overview
R&S
®
CMW500
63
User Manual 1173.9463.02 ─ 02
Statistic Count / Measurement Cycle
The statistic count (also termed statistic length) is the integer number of measurement
intervals per measurement cycle (statistics cycle, single-shot measurement). The length
of a measurement interval is measurement-specific. Conformance measurement speci-
fications often request a certain number of repetitions of a particular measurement. Select
the statistic count accordingly. The required statistics for the measurement is then
reached after one measurement cycle (single shot).
●
The measurement interval for the GPRF Power measurement is a configurable time
interval termed the Measurement Length/Step Length. This corresponds to either a
single power step (if no sequence mode is active) or a step sequence.
●
The measurement interval for the GPRF External Power Sensor measurement is the
time to request and obtain a single power result from the power sensor.
●
The measurement interval in most network test applications is related to a network-
specific periodic time interval, e.g. a timeslot or burst.
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
.
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 mode 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). See also
.
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.
Measurements
