Agilent Technologies Infinium DCA 86100A Service Manual page 46

Adjustments
Timebase Adjustment
Figure 3-2. Mainframe Timebase Calibration
On the DCA screen press, Mainframe Time base Calibration (Service Only).
16 Follow the instructions on screen.
If it is necessary to adjust the tuning capacitor:
a Turn the DCA on it's side to locate the hole plug at the bottom. See Figure 3-3.
Figure 3-3. Hole Plug Location
b Rotate the hole plug while pulling to remove it from the adjustment hole.
3-6