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Operating Instructions
TDS 684A, TDS 744A, & TDS 784A Service Manual
2–13
2. Set up a function using the general purpose knob (20). (The examples of
possible menu selections in the substeps that follow assume you’ve pushed
TRIGGER MENU.)
19 20
21
a. Pushing some main-menu buttons displays a side menu with labels
containing readouts that can be varied. Example: Push Level (21).
b. Pushing the side-menu button Level assigns the general purpose knob to
control the readout appearing in the button label. It also copies the
readout to the general purpose knob readout area in the right corner of
the screen. Example: Push Level (19).
c. Use the general purpose knob (20) to adjust the trigger level to the
setting desired. Example: Turn the knob to –20 mV.
More About the General Purpose Knob. As you’ve just seen, the general purpose
knob can be used to extend the number of choices available to a side menu
button. The general purpose knob can also be assigned to control the following
functions:
H Cursor positioning
H Display intensities
H Delay time