Agilent Technologies 54830 Series, Service Manual

Page: 83 / 170

4–2
Calibrating and Adjusting
This chapter provides firmware (self calibration) and hardware adjustment procedures
for the Agilent Technologies 54830 Series oscilloscope.
• Self calibration
Self Calibration Interval and Hardware Adjustments
The firmware calibration is the self cal (self calibration). Self calibration should be done
every year, or every 2,000 hours of operation, whichever comes first. There are no
hardware adjustments required for the 54830 Series oscilloscope.
The self calibration uses signals generated in the oscilloscope to calibrate channel
sensitivity, offsets, and trigger parameters. You should run the self calibration
• yearly, or according to your periodic needs,
• when you adjust or replace the acquisition assembly or acquisition hybrids,
• when you replace the hard drive or any other assembly,
• when the delta temperature is more than
±
5
°
C different than the last calibration, or
• after performing incoming performance verification and before performing outgoing
performance verification.
The need for self calibration will also depend on the environment in which you use the
oscilloscope.
Calibration Procedures
The procedures start with the next paragraphs. Unless specified elsewhere, procedures
must be followed in the order given. Display checks are optional and independent of
other procedures.
W A R N I N G
SHOCK HAZARD!
Read the Safety information at the back of this guide before performing adjustment procedures.
Failure to observe safety precautions may result in electrical shock.
W A R N I N G
INJURY CAN RESULT!
Install the fan safety shield (included in the Service Kit) if you remove the oscilloscope cover.
Without this shield, the oscilloscope fan blades are exposed and can cause injury.
Let the Oscilloscope Warm Up Before Adjusting
Warm up the oscilloscope for 30 minutes before starting adjustment procedures. Failure to allow warm-
up may result in inaccurate calibration.