HP 75000 C Series Service Manual page 55

Adjustments
5-1.
Introduction
This chapter contains a4ustments that assure peak performance of the
HP E1426A Oscilloscope. This instrument should be a4usted after
repair to assure performance.
Some Oscilloscope a4ustments are performed electrically, meaning a
manual a4ustment on a particular component is not necessary. The
order in which the aGustments are made is critical. Perform
aGustments in the order given.
Note
To consider the tests valid, the following conditions must be met:
The Oscilloscope must have a 30 minute warm-up a t ambient
temperature installed in the mainframe.
The line voltage must be 115/230 Vac f 10%.
For greatest accuracy, the temperature of the test area should
be between 18°C and 28°C and should be stable within f 1°C.
5-2. Equipment
Equipment required for the a4ustment procedures is listed in Table
Required
1-1,
Recommended Test Equipment. Any equipment that satisfies the
critical specifications given in the table may be substituted.
Caution
Do not remove the module with power applied to the mainframe.
The firmware calibration procedures should only be performed after the
instrument has run for one half hour a t ambient temperature installed
in the mainframe.
Notes
All firmware calibration/a&ustment procedums should be
done
in
the
order given
After calibrating, you MUST perform an AUToscale or *RST (reset) to
return
to
normal operation.
Adjustments 5-1