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3.4
3.4.1
3.4.2
3-17E
BRIEF CHECKING PROCEDURE
General information
This procedure is intended to check the oscilloscope performance with a minimum of test steps and actions
required.
It is assumed that the operator doing this test is familiar with oscilloscopes and their characteristics.
WARNING: _ Before switching-on, ensure that the oscilloscope has been installed in accordance with the
instructions mentioned in Chapter 2.
NOTE:
The procedure does not check every facet of the instrument's calibration; rather, it is concerned
primarily with those parts of the instrument that are essential to measurement accuracy and
correct operation,
It is not necessary to remove the instrument covers to perform this procedure. All checks
are made from the outside of the instrument.
If this test is started a few minutes after switching-on, bear in mind that test steps may be out of specification,
due to insufficient warm-up time. Therefore, to ensure accuracy, allow the full indicated warm-up time.
The following abbreviations are used:
CW
= Clockwise
CCW = Counter clockwise
The brief checking procedure is set up in such a way that in a fixed sequence of ten steps the most important
functions, including all front panel controls, are shown and checked. At the end of each step, the continuously
controls must be reset to the previous setting.
As stated, the procedure can be performed without removing the instrument covers.
For a complete check of every facet of the instruments calibration, refer to the section 'Performance Check"
in the Service Manual (for qualified personnel only).
Entering the brief checking procedure
To enter the procedure, proceed as follows:
—
Press MENU and keep it pressed.
— Press also AUTO SET.
— The L.C.D. should indicate: 1", "2" and "3".
— Press V-ch. B (i.e. the left side of the ch.
B UP—DOWN control).
— The L.C.D. should indicate: 2', which is the start for the checking procedure.
~— Check that the trace lies parallel with the horizontal graticule lines; if necessary readjust the TRACE ~
ROTATION control (see Appendix A).
—
Connect the CAL output to the channel A and B input sockets via 10:1 passive probes.
— The LCD indicates the stepnumbers.
—
Each step (2.0...2.9) can now be selected by pressing the "MENU" key.
—
For leaving the brief checking procedure, press AUTO SET two times.
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