HP 75000 C Series Service Manual page 56

Calibt
-3.
Vertical
Vertical calibration is performed on channels one through four
Procedure
(simultaneously) using the following procedure:
1.
Set the
CAL
FACTOR PROTECT switch to
UNPROTECTED.
2. Connect the Oscilloscope DC Calibrator Output connector to the
Input
1-4
connectors.
Note
Verify that the BNC cables are not longer than
1
meter and a s close in
length as possible.
I
PROTECTED
U
TOP VIEW
Figure 5-1. Example: Vertical Calibration Setup
3. Load the "default" calibration data.
4.
Perform clear status, reset, then preset the Oscilloscope.
5. Select and
start the vertical calibration routine. Calibration
will last for approximately 15 minutes. During calibration,
the access and error LED'S will be on.
5-2 Adjustments
February 9, 1991