Common Measurement Settings
R&S
®
FSPN
135
User Manual 1179.4363.02 ─ 01
Trigger Offset
Defines the time offset between the trigger event and the start of the measurement.
Offset > 0:
Start of the measurement is delayed
Offset < 0:
Measurement starts earlier (pretrigger)
Remote command:
TRIGger[:SEQuence]:HOLDoff[:TIME]
Defining a trigger hysteresis
The trigger "Hysteresis" is the distance in Hz to the
that the trigger
source must exceed before a trigger event occurs. Setting a hysteresis avoids unwan-
ted trigger events caused by frequency oscillation around the trigger frequency.
The trigger hysteresis is available for the frequency trigger.
Remote command:
TRIGger[:SEQuence]:FREQuency:HYSTeresis
Trigger Holdoff
Defines the minimum time (in seconds) that must pass between two trigger events.
Trigger events that occur during the holdoff time are ignored.
Remote command:
TRIGger[:SEQuence]:IFPower:HOLDoff
Defining a trigger slope
The trigger slope defines whether triggering occurs when the signal level or frequency
rises to the trigger level or frequency or falls down to it.
Remote command:
Defining a trigger drop-out time
The drop-out time is the minimum time period that must have passed between two
consecutive trigger events without initiating another measurement after the first trigger
event has occurred and initiated a measurement.
For the frequency trigger, the drop-out time avoids the triggering of another measure-
ment just because the frequency of the DUT is not yet stable.
Example:
The trigger event is a certain frequency on falling slope.
The first trigger event that initiates the measurement occurs. After some time, the trig-
ger frequency again falls below the trigger frequency - this happens several times, until
the DUT is stable.
Without a drop-out time, the R&S
FSPN would start a measurement each time the fre-
quency falls below the trigger frequency. With a drop-out time, however, only the first
trigger event initiates a measurement. The other trigger events after the first are
ignored, because the undesired events are within the drop-out time.
PN Transient Analysis Configuration
