Keysight E6640A, Measurement Applications User & Programmer Reference

Page: 346 / 2870

7 Trigger Functions
Trigger
had ONLY relative burst triggering
Initial S/W Revision Prior to A.02.00
Modified at S/W Revision A.04.00
Trigger Slope
It is set positive to trigger on a rising edge and negative to trigger on a falling edge.
Key Path
Trigger, RF Burst
Remote Command
:TRIGger[:SEQuence]:RFBurst:SLOPe POSitive|NEGative
:TRIGger[:SEQuence]:RFBurst:SLOPe?
Example TRIG:RFB:SLOP NEG
Couplings This same slope is used in the RF Burst selection for the trigger source in the Trigger menu and for
the period timer sync source (in the Trigger menu and in the Gate Source menu).
Preset POSitive
State Saved Saved in instrument state
Backwards
Compatibility SCPI :TRIGger[:SEQuence]:FRAMe:RFBurst:SLOPe
Backwards Compatibility
Notes The legacy :TRIGger[:SEQuence]:SLOPe command affects the slopes for the VID, LINE, EXT1, EXT2,
and RFB triggers.
Initial S/W Revision Prior to A.02.00
Trig Delay
Controls a time delay during which the analyzer will wait to begin a sweep after meeting the trigger
criteria. You can use negative delay to pre-trigger the instrument in time domain or FFT, but not in swept
spans.
Key Path
Trigger, RF Burst
Remote Command :TRIGger[:SEQuence]:RFBurst:DELay <time>
:TRIGger[:SEQuence]:RFBurst:DELay?
:TRIGger[:SEQuence]:RFBurst:DELay:STATe OFF|ON|0|1
:TRIGger[:SEQuence]:RFBurst:DELay:STATe?
Example TRIG:RFB:DEL:STAT ON
TRIG:RFB:DEL 100 ms
Notes Video trigger delay may be set to negative values, in time domain, FFT and even swept. It makes
intuitive sense in time domain and works well in FFT mode where the bandwidth of the filter before
the video trigger is about 1.25 span. In swept spans, negative settings of Trig Delay are treated as a
zero setting within the internal hardware and the advisory message "Neg. Trig Delay unavailable in
Swept Mode, zero delay used." is generated when such a delay is set.
346 W-CDMA & HSPA Measurement Applications Reference