Agilent Technologies X Series Manual page 588

Trigger
Min
Max
Default Unit
Initial S/W Revision
Modified at S/W Revision
Key Path
Remote Command
Example
Preset
State Saved
Initial S/W Revision
Modified at S/W Revision
Relative Trigger
Sets the relative trigger level for the RF burst envelope.
In some models, the relative burst trigger function is implemented in hardware. In other models, without
the advanced triggering hardware required, the relative burst trigger function is implemented in software
in some measurements, and is unavailable in other measurements.
When implemented in software, the relative RF Burst trigger function is implemented as follows:
The measurement starts with the absolute RF Burst trigger setting. If it can not get a trigger with that
level, auto trigger fires and the acquisition starts anyway. After the acquisition, the measurement
searches for the peak in the acquired waveform and saves it.
Now, in the next cycle of the measurement, the measurement determines a new absolute RF Burst level
based on the peak value from the first measurement and the Relative RF Burst Trigger Level (always 0
or negative dB) set by the user. The following formula is used:
absolute RF Burst level = peak level of the previous acquisition + relative RF Burst level
If the new absolute RF Burst level differs from the previous by more than 0.5 dB, the new level is sent to
the hardware; otherwise it is not updated (to avoid slowing down the acquisition)
Steps 2 and 3 repeat for subsequent measurements.
Key Path
Scope
588
–200 dBm
100 dBm
depends on the current selected Y-Axis unit
Prior to A.02.00
A.04.00
Trigger, RF Burst
:TRIGger[:SEQuence]:RFBurst:LEVel:TYPE
ABSolute|RELative
:TRIGger[:SEQuence]:RFBurst:LEVel:TYPE?
TRIG:RFB:LEV:TYPE REL
sets the trigger level type of the RF burst trigger to Relative.
ABSolute
Saved in instrument state
Prior to A.02.00
A.04.00
Trigger, RF Burst
Meas Global