Agilent Technologies 6800 Series, Product Note, Page: 22 / 30

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Agilent 6800 series setup
• Set the initial (immediate) voltage to 0 Vrms.
• Set the triggered voltage level to 120 Vrms.
• Set the frequency to 60 Hz.
• Set the peak current limit to maximum.
• Set the transient trigger source to BUS.
• Set the trigger synchronization source to Phase.
• Set the initial synchronization Phase to 40°
(re-program to 50°, 60°, 70°, 80°, and 90°).
• Set the acquisition trigger source to TTLTrg.
• Set the data acquisition offset to -409 points.
• Enable the output of the ac power source/
analyzer.
• Initiate the transient trigger.
• Initiate the acquisition trigger.
• Send a Bus trigger.
• Fetch the peak current measurement.
Upon receipt of the trigger, the ac power source/
analyzer output goes to 120 Vrms when the phase
voltage waveform reaches 40°. The data buffer
acquires 409 instantaneous current data points
before the turn-on event and 3687 instantaneous
current data points beginning at the onset of the
turn-on event (for a total buffer of 4096 current
data points) to generate the peak current measure-
ment. To continue the peak inrush current charac-
terization, change the synchronization phase (from
40° to 50°, 60°, 70°, 80°, and 90°) and repeat the
same procedure.
Timing Diagram for Application 4