Instrument Function > RF Block > RF Measurement > NRP-Z Power Analysis > Configure Pulse Data
Configure Pulse Data

For R&S NRP-Z power sensors that support time domain analysis and automatic pulse analysis.

The power sensors enable pulse data analysis in measurement mode time. All important pulse parameters are measured after setting the threshold levels. The following graph shows most of these parameters:

The sensor calculates the pulse parameters from each measurement and delivers the results to the R&S SMA.

The "Pulse Data" button opens the dialog to configure and enable pulse data analysis:

The indication state of the parameters also affects the hardcopy function. Storing the measurement diagram as hardcopy includes the parameters selected in this dialog. For information on storing measurement data, refer to "Save Hardcopy".

A total of six parameters can be indicated at one time. Structured hierarchically, trace 1 features top priority and trace 4 is addressed with the lowest weighting. I.e. only the first six checked parameters are indicated, starting with the settings of trace 1.

The pulse data is only visible for certain zoom levels of the diagram. The REARRANGE key or the key combination <STR+A> on an external keyboard toggles between the different zoom levels.

In the remote control mode, commands for setting the indication state differ from the commands for reading the values of the corresponding pulse data parameters.

In the description of the checkboxes, the different remote control commands are listed as shown in the example below:

Trace

Selects the index of the trace. The source for the trace data is selected below. The trace color for each of the four possible traces is preset but can be changed.

Remote command: 

n.a.

In remote control, the trace is selected by the suffix of keyword TRACe.

 
Indication

(time measurement mode only)

Indicates the type of R&S NRP power sensor assigned to the selected trace. This field is automatically updated if the sensor is connected or disconnected. Additionally, this sensor is indicated on the trace button in the measurement diagram.

Remote command: 

n.a.

 
State - Pulse Data Analysis

Enables pulse data analysis. The measurement is started with the "Start" button in the main measurement diagram.

Remote command: 
 
Voltage / Power Related - Pulse Data Analysis

Selects how the threshold parameters are calculated, either voltage related or power related. The voltage-related parameters represent the normal case, as the usual representation when defining the pulse parameters (rise/fall time, pulse width) is U(t). To achieve a display with equivalent power-related values, the voltage-related threshold values must be converted (squared) (see example in table below).

 

Distal

Mesial

Proximal

Voltage related:

90%

50%

10%

Power related:

81%

25%

1 %

    

log. Scale (for example):

(approximately, difference between top- base power > 30 dB )

-0.9dB

-6dB

-20dB

Remote command: 
 
Distal - Pulse Data Analysis

Sets the upper reference level in terms of percentage of the overall pulse level (power or voltage related). The distal power defines the end of the rising edge and the start of the falling edge of the pulse.

Remote command: 
 
Mesial - Pulse Data Analysis

Sets the medial reference level in terms of percentage of the overall pulse level (power or voltage related). This level is used to define the pulse width (τ) and pulse period.

Remote command: 
 
Proximal - Pulse Data Analysis

Sets the lower reference level in terms of percentage of the overall pulse level (power or voltage related).

The proximal power defines the start of the rising edge and the end of the falling edge of the pulse.

Remote command: 
 
Notifications - Pulse Data Analysis

Selects the pulse parameters to be indicated below the measurement diagram.

Note: The "Rearrange" key or the key combination <STR+A> toggle between the diagram views.

"Duty Cycle"

Indicates the ratio between the pulse duration (τ) and the pulse period (T) of the measured pulse signal in per cent:

Duty Cycle = (pulse duration / pulse period) * 100

Remote command: 

 

"Pulse Width"

Indicates the pulse duration of the pulse data measurement in seconds.

Remote command: 

 

"Pulse Period"

Indicates the time the pulse signal needs to complete one cycle.

Remote command: 

 

"Pulse Off Time"

Determines the time the pulse signal is low, that means as long as the signal level is below the proximal value.

Remote command: 

 

Transition Times - Pulse Data Analysis

Selects the transition parameters of the pulse signal to be indicated below the measurement diagram.

The R&S NRP-Z sensor searches for the first rising edge and the first falling edge in the trace.

Note: The "Rearrange" key or the key combination <STR+A> toggle between diagram views.

"Rise Time / Fall Time"

Display the time the signal requires from crossing low reference until it reaches high reference level and vice versa.

Remote command: 

 

"Pulse Start Time / Pulse Stop Time"

Display the time when the pulse signal crosses the medial reference level.

Remote command: 

 

"Overshoot (Rising Edge / Falling Edge)"

Display the maximum value of the pulse signal following a rising transition and the minimum value of the signal after a falling transition, respectively.

Overshoot values are given in per cent of the pulse amplitude as shown below:
  • Overshoot(pos) = 100* (maximum - top level ) / (top level - base level)
  • Overshoot(neg) = 100* (base level - minimum) / (top level - base level)

Remote command: 

 

Signal Power - Pulse Data Analysis

Selects the power parameters of the pulse signal to be indicated below the measurement diagram.

Note: The REARRANGE key or the key combination <STR+A> toggle between the diagram views.

"Minimal / Peak / Average Power" display the minimum, the maximum and the average power of the pulse signal in dBm.

Remote command: 
 
Pulse Power - Pulse Data Analysis

Selects which pulse power parameters are indicated in the diagram (pulse data view only).

Note: The "Rearrange" key or the key combination "<STR+a>" toggles between the diagram views.

"Top / Base Power"

Indicate the pulse top and base level of the analyzed signal in dBm.

Remote command: 

 

"Distal / Mesial / Proximal Power"

Display the absolute power values of the medial, low and high reference level in dBm.

Remote command: 

 

Diagram.. - Power Analysis

Returns to the "NRP-Z Analysis Diagram".

 


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