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

The "Trigger…" button opens the "Trigger NRP-Z Analysis" dialog. The button is only active for time measurement mode. For this mode, the measurement start has to be known to the sensor as the measurement is controlled by the sensor.

Power Sensor - Power Analysis

Selects the power sensor to be set if more than one sensor is connected to the instrument.

Remote command: 

n.a.

In remote control mode, the sensor is selected via the numeric suffix in the sense key word of the command, for example SENSe2:POWer:SWEep:….

 
Mode - Power Analysis

Selects if the measurement is free running, or starts only after an internal or external trigger event.

Remote command: 
 
Level - Power Analysis

Sets the trigger threshold. This setting is also possible by means of the trigger marker on the left side of the diagram.

Remote command: 
 
Slope - Power Analysis

Sets the polarity of the active slope of the trigger signals.

"Positive"

The rising edge of a trigger signal is active.

"Negative"

The falling edge of a trigger signal is active.

Remote command: 
 
Hysteresis - Power Analysis

Sets the hysteresis of the internal trigger threshold. Hysteresis is the magnitude (in dB) the trigger signal level must drop below the trigger threshold (positive trigger slope) before triggering can occur again.

Remote command: 
 
Drop out Time - Power Analysis

Determines the minimum time for which the signal must be below (above) the power level defined by "Level" and "Hysteresis" before triggering can occur again. It prevents the trigger system from being activated too early if the trigger threshold is briefly underranged or exceeded.

The dropout time parameter is useful when dealing with, for example, GSM signals with several active slots. When measuring in synchronization with the signal, a trigger event is to be produced at A, but not at B or C. As the RF power between the slots is below the threshold defined by "Level" and "Hysteresis", the trigger hysteresis cannot prevent triggering at B or at C. Select the dropout time parameter greater than the time elapsed between points E and B and between F and C, but less than the time elapsed between G and A. It makes sure that the trigger at A is effective.

As the mechanism associated with the dropout time parameter is reactivated whenever the trigger threshold is crossed, unambiguous triggering can also be obtained for many complex signals. By contrast, all triggering is suppressed during the hold-off time. I.e. in the example, that although stable triggering conditions can be obtained with a suitable hold-off time (regular triggering at the same point), it is not possible to set exclusive triggering at A.

Remote command: 
 
Auto Set - Power Analysis

Sets the trigger level, the hysteresis and the drop out time to default values.

Remote command: 
 
Diagram.. - Power Analysis

Returns to the "NRP-Z Analysis Diagram".

 


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