The basic evaluation period for POWer and SPECtrum measurements (function group RF) corresponds to a sweep (see also General Settings). In Audio measurements, the evaluation period corresponds to the time until the system has settled and a valid result is available.
Together with the Statistic Count, the Repetition Mode defines how many evaluation periods are measured if the measurement is not stopped explicitly (measurement control commands STOP..., ABORT...) or by a limit failure. With remote control the three repetition modes Single Shot, Continuous and Counting are available (Counting is not available in manual control, see Introduction - Manual Operation).
In POWer and SPECtrum measurements, different traces corresponding to the result in the current evaluation period, the maximum, minimum, or average over a set of evaluation periods (bursts) are determined. These results can be queried independently.
Repetition mode in remote control
|
Setting |
Description |
Command |
|
Statistic Count |
Integer number of evaluation periods forming one statistics cycle. |
CONFigure:<meas_obj>:CONTrol:STATistics
|
|
Repetition mode Single Shot |
The measurement is stopped after one statistics cycle. |
CONFigure:<meas_obj>:CONTrol:REPetition
|
|
Continuous |
The measurement is continued until stopped explicitly or by a limit failure. Results are valid after one evaluation period and updated after the next evaluation period has been terminated. Average results are calculated according to the rules given in chapter 3. |
CONFigure:<meas_obj>:CONTrol:REPetition |
|
Counting |
Repeated single shot measurement with a definite number of evaluation periods. The stepping mode (<Stepmode> = STEP | NONE) determines whether or not the measurement is stopped after each evaluation period or not, see Measurement Control Commands and States. |
CONFigure:<meas_obj>:CONTrol:REPetition
A counting measurement with 1 evaluation period is equivalent to a single shot measurement.. |
|
Traces |
The specifiers [CURRent:], MAXimum, MINimum, and AVERage denote the traces for the current evaluation period, the maximum, minimum, extreme value, or average of a set of evaluation periods. They correspond to the Display Mode set in the measurement configuration menus. In general all four traces are evaluated during the measurement. They are selected via the specifiers used as last keywords in the READ..., FETCh... or SAMPle... queries. |
Measurement results: Limit matching: <disp> = [:CURRent] | :AVERage | |
Note: Some measurement groups (e.g. the WPOWer measurement in function group RF) use simplified statistical settings where the Statistic Count is always 1. It is still possible to select different repetition modes for these measurements.