Set up control loop analysis source channel – Teledyne LeCroy Power Analyzer Package User Manual
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Operator's Manual
When setting up the Control Loop trigger:
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Set up a stable display of the signal that will be used as the source of the modulation information.
Ensure that a clean signal can be acquired that will allow the signal’s width (or other characteristic)
to be readily measured.
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If the modulated signal is to be acquired as the result of a one-time event such as turn-on, test the
trigger for satisfactory operation in Single trigger mode. If the event is repetitive, you can use the
oscilloscope’s Normal trigger.
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Be sure to set trigger Delay and Time/div to a value that will allow the capture of a modulated sig-
nal record sufficiently long to cover the time of interest.
Set Up Control Loop Analysis Source Channel
This procedure selects the voltage source channel and makes any necessary offset or deskew adjust-
ments to ensure measurement accuracy.
If you have just performed the preliminary deskew procedure, begin at Step 5.
1. From the menu bar, choose Analysis > Power Analysis to open the Power Analysis dialog.
2. Check Enable.
3. Select the Voltage Source channel where the voltage probe is attached.
4. If you are using a current device to trigger on a load change event:
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Touch the Input Settings tab and enter the Deskew value obtained during the preliminary deskew
procedure.
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Choose ProbeType.
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If the current device is other than a probe (e.g., shunt resistor), also make these entries:
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If an amplifier, also enter the Amps/div.
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If a shunt resistor, also enter Shunt Resistor Ohms.
5. Adjust Fine DC Offset to zero the level.
6. If necessary, touch Select Source and make any final adjustments on the voltage or current Channel
setup dialogs.
NOTE: If you change the probe, bandwidth or filter settings at this point, repeat the
and re-adjust the Deskew setting on the Input Settings dialog.
Obtain a stable display of at least one cycle of the voltage signal across the device, then go on to perform
your desired tests.
921326 Rev B
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