Agilent Technologies ESA-E Series Programmer's Manual page 320

Language Reference
TRIGger Subsystem
This command activates the trigger condition that allows the next
sweep to start when the external voltage (connected to GATE
TRIG/EXT TRIG IN on the rear panel) passes through approximately
1 .5 volts . The external trigger signal must be a 0 V to +5 V TTL signal.
This function only controls the trigger polarity (for positive o r
negative-going signals) .
Factory Preset
and *RST : Positiv e
Front Panel
Access :
Trig, External Pos Neg
Trigger Offset
TRIGger :SEQuence :OFFSet <64 bit floating point value >
TRIGger : SEQuence :OFFSet ?
This command sets the trigger offset .
Factory Preset
and *RST :
0 seconds
Example : : TRIG : SEQ :OFFS 1 .0s
Range: Hardware specific; dependent upon the ADC being
used, current state and the number of sweep points .
Default Unit: seconds
Remarks : Trigger offset refers to the specified time interval befor e
or after the trigger event from which data is to be
written to the trace, and then displayed . Ordinarily, th e
trigger offset value is zero, and trace data is displayed
beginning at the trigger event. A negative trigger offse t
value results in the display of trace data prior to th e
trigger event . A positive trigger offset value results in
an effective delay in the display of trace data after the
trigger event .
The trigger offset value used when the feature is
enabled will depend on the following parameters :
• Nominal trigger offset value originally entere d
• Specific instrument hardware in use
• Sweep time
• Number of sweep points
The effective trigger offset value will be re-calculate d
whenever any of these parameters change .
5-160 Chapter 5