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                                                            Section 6 Internal Calibration and Diagnostics


 SECTION      6         INTERNAL CALIBRATION and DIAGNOSTICS



6.1   Introduction

        The 9354A/T internal calibration use routines to confirm basic functionality, no test
        equipment is required to do these test procedures. The diagnostics menu is entered by
        simultaneously depressing the third and fourth menu push buttons on the right hand
        side of the CRT and then by depressing the fifth.

        To quickly check the performance of the digital storage oscilloscope, select the
        calibration diagnostics.

        Press the recalibrate completely button to do a full recalibration of the front end.
        It is advisable to perform this type of check when the scope is in a stable condition.




                                         Page 6-1
Section 6 Internal Calibration and Diagnostics


6.2      Diagnostic Summary

            Press diagnostic summary.

            This is a handy tool to perform a quick but comprehensive internal performance
            check, without touching the acquisition settings. The failures are indicated by channel
            identifiers.

            If no problem is detected, the fields are left blank.




            The gain and offset calibration results displayed for Channel 1, Channel 2, Channel 3
            and Channel 4 are independent of the following conditions:

            Time base
            50  or 1 M input impedance
            BWL on or off
            Variable gain
            Offset
            Trigger mode and coupling

            The internal calibration is checked at DC 1 M, and for the six gain settings :
            2 mV, 5 mV, 10 mV, 20 mV, 50 mV, .1 V/div.




                                             Page 6-2

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