HP 54540 Series - Keystroke Conventions; Operating Hints; Test Record

The loop test in the selftest menu is a troubleshooting aid for factory service only.
Test Record
You may record the results of the performance tests in the Performance Test Record
provided at the end of this chapter. The Performance Test Record lists the
performance tests and provides an area to mark test results. You can use the results
recorded at incoming inspection for later comparisons during periodic maintenance,
troubleshooting, and after repairs or adjustments.
Operating Hints
Some knowledge of operating the oscilloscope is helpful; however, these procedures
are written so that little experience is necessary. The following two hints will speed
progress of the testing.
Clear Display
When using many averages, it often takes awhile for a waveform display to stabilize
after a change. When a control on the oscilloscope is changed, averaging
automatically
restarts.
When
just
the
input
signal
is
changed,
the
instrument
must
average new data with the old so it takes longer for the waveform to stabilize.
Press Clear display while changing input signals. The instrument will
restart averaging and give a quick indication of the result of the signal change.
Averaging
Averaging is used to assure a stable signal for measurements. It is not necessary to
wait for complete stability of the signal (averaging complete), as long as the
measurement is well within the limits of the test.
Keystroke Conventions
To guide you while setting up the oscilloscope the following conventions are used to
represent keystrokes and other interactions with the instrument:
Text inabox,suchas Utility or “Time base , represents hardkeys, those
defined by text on the front panel.
Bold text in a typewriter font, such as Display or Calibrate..., represents text on
the CRT screen and may be a softkey you should press or a message to consider.
The blue key that has no writing on it is a shift key. It allows you to access the
functions written in blue above some of the hardkeys. In this guide it is represented
by a box with the word "blue" in it, like this: (blue)
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