Tektronix 4000 Series, Service Manual

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Adjustment Procedures
Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual
3- 3
NOTE
. Do not turn any knobs or push any front-panel buttons other than the
Next Step or Previous Step buttons during the adjustment procedure. Doing so
will cause the oscilloscope to abort the adjustment procedure. The oscilloscope
uses the previous calibration constants if the adjustment procedure is aborted or
fails.
The screen does not display the actual oscilloscope settings (such as channel
input impedance, or vertical and horizontal settings) during the adjustment
procedure. The oscilloscope automatically sets the instrument settings, but these
settings may not read out correctly on the display.
During some steps, the instrument may appear to be idle for several minutes
while it is processing information internally.
If the oscilloscope completes all steps in the procedure successfully, a “Pass”
message is displayed and the new calibration constants take effect. If the
oscilloscope does not pass a step, you can repeat the step. To cancel the
calibration procedure, press the
Menu Off front panel button on the oscilloscope.
This reverts the oscilloscope to the old calibration constants.