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TDS 620A, 640A, & 644A User Manual
Once the digitizing oscilloscope is installed, it is typical to leave the princi-
pal power switch on and use the ON/STBY button as the power switch.
ON/STBY Button
Figure 1-2: ON/STBY Button
Self Test
Check the self test results. The digitizing oscilloscope automatically performs
power-up tests each time it is turned on. It will come up with a display screen
that states whether or not it passed self test. (If the self test passed, the
status display screen will be removed after a few seconds.)
If the self test fails, call your local Tektronix Service Center. Depending on the
type of failure, you may still be able to use the oscilloscope before it is serv-
iced.
Power Off
Toggle the ON/STBY switch to turn off the oscilloscope.