Agilent Technologies Signal Analyzer N9030a - Manual (Page 1428)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Trigger
Modified at S/W
Revision A.04.00
Relative Trigger Level
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:
1. The measurement starts with the absolute RF Burst trigger setting. If it cannot 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.
2. 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
3. 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 Trigger, RF Burst
Scope Meas Global
Remote Command :TRIGger[:SEQuence]:RFBurst:LEVel:RELative
:TRIGger[:SEQuence]:RFBurst:LEVel:RELative?
Example TRIG:RFB:LEV:REL –10 dB
sets the trigger level of the RF burst envelope signal to the relative level of –10 dB
Notes Sending this command does not switch the setting from absolute to relative; to switch it you
need to send the :TRIGger[:SEQuence]:RFBurst:LEVel:TYPE command, above.
The relative trigger level is not available in some measurements. In those measurements the
RELative parameter, and the :TRIGger[:SEQuence]:RFBurst:LEVel:TYPE
command (above), will generate an error if sent.
Dependencies This key is grayed out and Absolute Trigger Level selected if the required hardware is not present
in your analyzer and the current measurement does not support Relative triggering.
Preset –6 dB
1428 Remote Language Compatibility Measurement Application Reference