Agilent Technologies Infinium DCA 86100A Service Manual page 48

Adjustments
Timebase Adjustment
Automated Test
Software Procedure
1 Make sure the instrument cover is in place.
2 Install the plug-in module(s) into the mainframe module slots, then tighten both screws.
3 Turn on the mainframe. After the boot-up is complete, press the Default Setup hardkey on the
DCA front panel.
4 Turn on the electrical channel by pressing the CHANNEL 2 hardkey on the DCA front panel.
Turn all other channels off.
5 On the DCA front panel, set the trigger source to Free Run by pressing the Source hardkey until
Free Run is selected.
N O T E Allow all of the equipment to warm up for at least one hour in the settings specified above before
you proceed. These settings are optimal for generating typical operating conditions.
6 Connect all cables from the VISION test system to the DCA under test.
7 Register the DCA to the test system database.
8 Select Adjust/Cal for doing the mainframe calibration.
9 Select the following tests to run:
• Module Calibration
• Mainframe Cal
10 Follow the on-screen instructions for the automated testing
N O T E DCA firmware versions earlier than A.04.00 prevent the test software from querying the DCA for
test completion during the mainframe timebase calibration. To workaround this issue the test
software goes into a wait loop while the DCA routine is working. You STOP the loop when your
see that the timebase routine is complete.
For example, at some point during the Mainframe Timebase Calibration, the message on the screen of the
DCA will say to "Adjust Capacitor for 2 mV". A wait loop will run on the test software for approximately
300 seconds (5 minutes), allowing you to make the adjustment. After the adjustment is complete, you click
the STOP button on the test software to allow it to continue to the next step (or let the 300 seconds run out
and it will automatically advance).
N O T E DCA firmware versions A.04.00 and above allow the test software to function normal, without
the wait loop.
N O T E If a capacitor adjustment is required, refer to
the full 10 minutes after changing the capacitor to allow it to settle and check the readings in the
normal operation position.
3-8
Step a above to locate the capacitor. Be sure to wait