Rohde & Schwarz SMAB-K24 - Next Window List

Improving Level Performance
R&S
®
SMA100B
250User Manual 1178.3834.02 ─ 05
Remote command:
:SENSe<ch>[:POWer]:SWEep:TIME[:SENSor]:TRIGger:HYSTeresis
on page 464
Drop out Time - Power Analysis
Determines the minimum time for which the signal must be below (above) the power
level defined by Level - Power Analysis and Hysteresis - Power Analysis before trigger-
ing can occur again. This 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 performing a measurement in sync 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 - Power Analysis and Hysteresis - Power
Analysis , the trigger hysteresis alone cannot prevent triggering at B or at C. This is
why the dropout time parameter is selected to be 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. This ensures that triggering takes place at A.
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. For
the example described, this would mean that although stable triggering conditions
could be obtained with a suitable hold-off time (regular triggering at the same point), it
would not be possible to set exclusive triggering at A.
Remote command:
:SENSe<ch>[:POWer]:SWEep:TIME[:SENSor]:TRIGger:DTIMe on page 464
Auto Set - Power Analysis
Sets the trigger level, the hysteresis and the drop out time to default values.
Remote command:
:SENSe<ch>[:POWer]:SWEep:TIME[:SENSor]:TRIGger:AUTO on page 463
Next Window List
Access:
1. Select "Clk Syn/Power Sens" > "NRP Power Analysis".
2. Select "Configure" > "Next Window List"
Using Power Sensors