The dialog contains the parameters required for configuring the measurement in the frequency, power or time domain.
See also overview of features and operation in "NRP-Z Power Analysis".
► | To access the "Configure NRP-Z Analysis" dialog, select "Config...". The measurement section provides the parameters for configuring the measurement either in frequency, power or time domain. |
Selects the measurement mode.
The power versus frequency and power versus power modes are generator driven, that means, the generator provides the measurement signal. The time mode is signal driven, that means besides the generator signal also external signals can be analyzed. It requires an additional trigger event, for which level, hysteresis and dropout time are freely selectable.
"Frequency" | Power versus frequency measurement (frequency response). |
"Power" | Power versus power measurement (power sweep, AM/AM). |
"Time" | Power versus time measurement (envelope power measurement as a function of time, NRP trace mode). The R&S SMA samples power over a time interval and assigns the internal power values that have been determined to a number of points. This mode also provides gated measurement and pulse data analysis, e.g. with a connected R&S NRP-Z81, and the corresponding graphical display "Gate View" and "Pulse Data View". |
Sets the minimum frequency/power/time of the measurement.
The available frequency/power range depends on the frequency/power range of the generator and the used power sensor.
The range for the start time is -1s to +1s. Value 0 defines the trigger point. By choosing a negative time value, the trace can be shifted in the diagram.
It is possible, that the measurement cannot be performed over the complete time range because of limitations due to sensor settings. In this case, the R&S SMA generates an error message.
If you change this value for a finished single measurement, only the scaling of the x-axis changes. This way, you can zoom the trace. However, for subsequent measurements, the measurement range is changed according to the new setting.
If you change this value during a continuous measurement, only the scaling of the x-axis changes for measurement cycles that have been triggered before the change. For subsequent measurement cycles, the measurement range changes according to the new setting.
Remote command:Sets the maximum frequency/power/time of the measurement.
The available frequency/power range depends on the frequency/power range of the instrument and the used power sensor.
The range for the stop time is 0 s to 2 s. Value 0 defines the trigger point.
It is possible, that the measurement cannot be performed over the complete time range because of limitations due to sensor settings. In this case, an error message is output.
If you change this value for a finished single measurement, only the scaling of the x-axis changes. This way, you can zoom the trace. However, for subsequent measurements the measurement range is changed according to the new setting.
If you change this value during a continuous measurement, only the scaling of the x-axis changes for measurement cycles that have been triggered before the change. For subsequent measurement cycles, the measurement range changes according to the new setting.
Remote command:Sets the number of steps for the sweep. The number of measured points is steps + 1. The number of steps is one of the parameters that define the measurement speed. The higher the number of steps, the longer the measurement takes (frequency and power mode).
Remote command:Frequency and power mode only.
Selects the timing mode of the measurement in frequency and power mode. This parameter is not available in time mode.
"Fast" | Fast measurement with an integration time of 2 ms for each measurement step. |
"Normal" | A longer but more precise measurement (integration time is 20 ms/step). |
Time mode only
Selects the averaging factor in time mode. This parameter is not available in frequency and power mode.
The factor determines how many measurement cycles are used to form a measurement result. Higher averaging counts reduce noise but increase the measurement time. Averaging requires a stable trigger event so that the measurement cycles have the same timing. If factor 1 is selected, no averaging is performed.
Remote command:Sets the mode for calculating the sweep steps.
In power versus frequency mode, selection between linear and logarithmic spacing is possible.
"Linear" |
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"Logarithmic" | Power versus frequency In a logarithmic sweep, the frequency is swept in equidistant steps on a logarithmic scale. The x-axis is a logarithmic frequency axis. |
Selects single or continuous mode in power analysis.
The measurement is started in the diagram using the "Start" button. During measurement, the "Start" button is replaced by a "Stop" button which can be used to abort the measurement. The progress bar indicates the status of the measurement.
Note: For time mode, an additional trigger is required (see "Configure Trigger").
"Single" | Selects single measurement. |
"Cont." | Selects continuous measurements. |
Ddetermines, whether the measurement data processing starts with a trigger event in one of the sensors (Logical OR), or whether all channels have to be triggered (logical AND). Each sensor evaluates a trigger event according to its setting independently.
This function supports the internal or external trigger modes with multi-channel time measurements.
"Wired AND" | When all channels are triggered, the measurement starts. |
"Wired OR" | The measurement starts when a trigger event occurs. |
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